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240 area code

Area code 240 is in Maryland (MD), USA and some of the main locations covered are Germantown, Rockville, Gaithersburg, .. (jump to city list below).

Area code 240 has been in service since 01 June 1997 and is an overlay code part of overlay complex 301/240 (overlaying area codes cover the same geographic area).

10:03:52 AM is the current time in area code 240 (Eastern Time).

Reverse phone lookup

Map of area code 240

More Maryland area codes

List of 240-NXX prefixes and corresponding locations

NPANXX¹	Area served²	Date³

240-200	Washington Zone 2	10/4/2010
240-201	Ridge
240-202	Highfield	5/28/2020
240-203	Hagerstown	10/4/2011
240-204	Washington Zone 2	9/7/2011
240-205	Washington Zone 10	7/23/2003
240-206	Washington Zone 14
240-207	Damascus
240-208	La Plata
240-209	Indian Head
240-210	Waldorf
240-212	Oakland
240-213	Waldorf
240-214	Mechanicsville
240-215	Frederick
240-216	Waldorf	3/15/2001
240-217	Hagerstown	4/16/2001
240-218	Nanjemoy
240-219	Ridge	9/22/2014
240-220	Poolesville
240-221	Washington Zone 11
240-222	Waldorf
240-223	Washington Zone 2
240-224	Gaithersburg	9/10/2012
240-225	Frederick
240-226	Oakland	7/16/2020
240-228	Washington Zone 13
240-229	Waldorf
240-230	Hughesville
240-231	Hagerstown
240-232	Washington Zone 14
240-233	Tompkinsville
240-234	Washington Zone 2	10/4/2011
240-235	Washington Zone 2
240-236	Frederick
240-237	Lexington Park-Great Mills
240-238	Washington Zone 10
240-239	Leonardtown
240-240	Damascus	7/2/2020
240-241	Washington Zone 13
240-242	Washington Zone 11
240-243	Gaithersburg
240-244	Washington Zone 16
240-245	Washington Zone 14
240-246	Gaithersburg
240-247	Washington Zone 3
240-248	Ridge
240-249	Mechanicsville
240-250	Brandywine
240-251	Highfield
240-252	Gaithersburg
240-253	Washington Zone 6
240-254	Hughesville
240-255	Poolesville
240-256	Leonardtown
240-257	Nanjemoy
240-258	Ridge
240-259	Hughesville	4/22/2021
240-260	Washington Zone 14
240-261	Gaithersburg	12/23/2015
240-262	Lexington Park-Great Mills	10/17/2011
240-263	Washington Zone 2	11/10/2011
240-264	Laurel
240-265	Washington Zone 2	11/10/2011
240-266	Washington Zone 14
240-267	Hagerstown	5/18/2017
240-268	Washington Zone 10
240-269	Washington Zone 16
240-270	Waldorf	11/7/2011
240-271	Washington Zone 2
240-272	Washington Zone 2	11/10/2011
240-273	Washington Zone 6
240-274	Washington Zone 2
240-275	Grantsville
240-276	Washington Zone 10	5/4/2004
240-277	Washington Zone 2	10/18/2002
240-278	Laurel	7/8/2011
240-279	Waldorf
240-280	Laurel
240-281	Washington Zone 2
240-282	Mechanicsville
240-283	Washington Zone 11
240-284	Frostburg	11/1/2004
240-285	Frederick
240-286	Washington Zone 2	9/17/2002
240-287	Hancock
240-288	Thurmont	11/1/2004
240-289	Washington Zone 6
240-290	Washington Zone 11
240-291	Hagerstown	10/15/2002
240-292	Washington Zone 11
240-293	Washington Zone 12
240-294	Laurel
240-295	Laurel
240-296	Washington Zone 4
240-297	Washington Zone 13
240-298	Leonardtown
240-299	Waldorf
240-300	Waldorf	12/7/2010
240-301	Clear Spg	6/9/2020
240-302	Laurel	9/28/2016
240-303	Washington Zone 16
240-304	Washington Zone 5	7/3/2002
240-305	Washington Zone 3
240-306	Gaithersburg
240-307	Emmitsburg	3/27/2003
240-308	Damascus
240-309	Leonardtown	9/10/2012
240-310	Hagerstown
240-312	Washington Zone 5
240-313	Hagerstown
240-314	Washington Zone 10
240-315	Frederick
240-316	Washington Zone 2
240-317	Lexington Park-Great Mills
240-318	Washington Zone 16
240-319	Laurel	6/6/2008
240-320	Waldorf
240-321	Oakland
240-322	Mccoole
240-323	Emmitsburg
240-324	Ashton	10/8/2008
240-325	Damascus
240-326	Washington Zone 15
240-327	Gaithersburg
240-328	Washington Zone 10
240-329	Hagerstown
240-330	Washington Zone 2	12/14/2007
240-331	Washington Zone 3
240-332	Tompkinsville
240-333	Washington Zone 2	5/9/2001
240-334	Washington Zone 14
240-335	Washington Zone 14
240-336	Washington Zone 2
240-337	Washington Zone 5
240-338	Washington Zone 3
240-339	Washington Zone 15
240-340	Washington Zone 2	8/18/2011
240-341	Buckeyestown	2/25/2009
240-342	Ashton
240-343	Hancock	5/10/2011
240-344	Frederick	10/15/2002
240-345	Ashton	3/9/2006
240-346	Waldorf
240-347	Hagerstown	8/4/2008
240-348	Washington Zone 16
240-349	La Plata
240-350	Washington Zone 3
240-351	Washington Zone 3
240-352	La Plata
240-353	Washington Zone 3
240-354	Washington Zone 3
240-355	Washington Zone 3
240-356	Myersville
240-357	Frederick	6/12/2006
240-358	Damascus
240-359	Indian Head
240-360	Laurel	9/17/2013
240-361	Gaithersburg
240-362	Cumberland
240-363	Washington Zone 11
240-364	Gaithersburg	5/9/2001
240-365	Damascus
240-366	Williamsport
240-367	Frederick	10/18/2002
240-368	Waldorf
240-369	Mount Airy
240-370	Washington Zone 2	12/14/2007
240-371	Washington Zone 12
240-372	Gaithersburg
240-373	Washington Zone 13
240-374	Laurel
240-375	Washington Zone 5
240-376	Hughesville
240-377	Indian Head
240-378	Cumberland
240-379	Frederick
240-380	Washington Zone 2	9/17/2007
240-381	Washington Zone 3
240-382	Hagerstown	6/11/2009
240-383	Washington Zone 2
240-384	Lexington Park-Great Mills
240-385	Myersville
240-386	Washington Zone 10
240-387	Washington Zone 13
240-388	Gaithersburg	11/4/2002
240-389	Ashton
240-390	Ashton
240-391	Washington Zone 13
240-392	Washington Zone 5
240-393	Washington Zone 3
240-394	Mount Airy	12/13/2004
240-395	Washington Zone 2
240-396	Washington Zone 2
240-397	Frederick	3/6/2009
240-398	Washington Zone 3	7/3/2002
240-399	Washington Zone 10
240-400	Washington Zone 2	8/18/2011
240-401	Washington Zone 10
240-402	Washington Zone 13	9/21/2010
240-403	Washington Zone 10
240-404	Gaithersburg	2/13/2001
240-405	Frederick	7/27/2004
240-406	Washington Zone 10	9/17/2009
240-407	Washington Zone 16
240-408	Washington Zone 10	10/14/2009
240-409	Frederick
240-410	Cumberland	1/13/2021
240-412	Waldorf	1/16/2001
240-413	Washington Zone 4	3/12/2001
240-414	Washington Zone 6
240-415	Frederick	12/16/2008
240-416	Waldorf	5/18/2001
240-417	Washington Zone 5
240-418	Washington Zone 2	11/12/2001
240-419	Waldorf	10/29/2007
240-420	Hagerstown
240-421	Washington Zone 10	4/9/2001
240-422	Frederick	5/15/2002
240-423	Washington Zone 3	5/21/2001
240-424	Washington Zone 3	11/16/2007
240-425	Washington Zone 2
240-426	Washington Zone 2	10/25/2001
240-427	Waldorf	4/23/2001
240-428	Washington Zone 10
240-429	Washington Zone 3	12/19/2006
240-430	Washington Zone 11
240-431	Lexington Park-Great Mills
240-432	Washington Zone 3
240-433	Washington Zone 12
240-434	Leonardtown
240-435	Waldorf	5/7/2009
240-436	Buckeyestown
240-437	Ashton
240-438	Washington Zone 3	8/15/2011
240-439	Frederick	6/6/2008
240-440	Frederick	2/27/2009
240-441	Washington Zone 6	6/6/2001
240-442	Oakland	5/22/2001
240-443	Washington Zone 6	11/6/2020
240-444	Laurel	9/7/2011
240-445	Washington Zone 2	11/10/2011
240-446	Frederick	8/9/2001
240-447	Washington Zone 10
240-448	Waldorf	9/7/2011
240-449	Gaithersburg
240-450	Washington Zone 3
240-451	Thurmont	9/2/2016
240-452	Hagerstown	7/22/2010
240-453	Washington Zone 10
240-454	Gaithersburg	4/22/2005
240-455	Washington Zone 5	6/20/2001
240-456	Laurel
240-457	Frederick	9/4/2008
240-458	Waldorf	10/4/2011
240-459	Laurel	7/27/2010
240-460	Washington Zone 3
240-461	Washington Zone 3
240-462	Washington Zone 3
240-463	Washington Zone 3
240-464	Washington Zone 2
240-465	Washington Zone 2
240-466	Mechanicsville	7/10/2001
240-467	Washington Zone 4	4/25/2013
240-468	Washington Zone 3	11/16/2007
240-469	Hagerstown	2/14/2008
240-470	Laurel	10/4/2011
240-471	Washington Zone 12
240-472	Washington Zone 3
240-473	Washington Zone 13
240-474	Gaithersburg	5/22/2015
240-475	Washington Zone 3
240-476	Washington Zone 3	2/21/2001
240-477	Gaithersburg	5/20/2005
240-478	Washington Zone 3	7/27/2004
240-479	Washington Zone 2	4/7/2008
240-480	Washington Zone 2	9/27/2010
240-481	Washington Zone 3	5/11/2001
240-482	Washington Zone 2
240-483	Washington Zone 2
240-484	Laurel	6/12/2017
240-485	Washington Zone 3
240-486	Washington Zone 14	3/12/2001
240-487	Washington Zone 4
240-488	Oakland	5/16/2012
240-489	Poolesville	2/13/2001
240-490	Middletown	6/12/2001
240-491	Washington Zone 3
240-492	Washington Zone 5
240-493	Washington Zone 6
240-494	Washington Zone 3	5/9/2001
240-495	Washington Zone 4	10/29/2013
240-496	Leonardtown	3/17/2016
240-497	Washington Zone 2
240-498	Washington Zone 2
240-499	Washington Zone 10
240-500	Hagerstown	10/21/2010
240-501	Washington Zone 3	10/8/2001
240-502	Washington Zone 3	10/4/2011
240-503	Tompkinsville	4/9/2013
240-504	Washington Zone 3	10/4/2011
240-505	Washington Zone 3	10/31/2001
240-506	Washington Zone 10	1/9/2002
240-507	Washington Zone 2	9/5/2008
240-508	Washington Zone 5
240-509	Washington Zone 14	3/31/2008
240-510	Washington Zone 15
240-512	Washington Zone 13	8/8/2006
240-513	Hagerstown	10/19/2011
240-514	Washington Zone 11
240-515	Washington Zone 2	6/20/2001
240-516	Washington Zone 12
240-517	Laurel	10/28/2014
240-518	Waldorf	10/21/2011
240-519	Washington Zone 2	11/10/2011
240-520	Hagerstown	3/29/2006
240-521	Laurel	1/11/2018
240-522	Cumberland	12/12/2001
240-523	La Plata	2/13/2001
240-524	Laurel
240-525	Washington Zone 15
240-526	Leonardtown
240-527	Hagerstown
240-528	Hughesville
240-529	Frederick
240-530	Waldorf	8/1/2013
240-531	Washington Zone 3	3/7/2017
240-532	Washington Zone 5	10/29/2013
240-533	Washington Zone 3
240-534	Washington Zone 2	4/11/2016
240-535	Washington Zone 3	1/9/2001
240-536	Ashton
240-537	Hagerstown	9/15/2017
240-538	Leonardtown	2/13/2001
240-539	Washington Zone 4
240-540	Washington Zone 13	10/5/2016
240-541	Washington Zone 2	10/31/2011
240-542	Washington Zone 13
240-543	Washington Zone 2	7/25/2006
240-544	Washington Zone 14
240-545	Washington Zone 15
240-546	Washington Zone 16
240-547	Laurel
240-548	Washington Zone 14
240-549	Frederick	3/17/2016
240-550	Washington Zone 10	3/26/2009
240-551	Washington Zone 10	3/25/2009
240-552	Washington Zone 10	3/25/2009
240-553	Washington Zone 13
240-554	Laurel
240-556	Washington Zone 14
240-557	Washington Zone 6	3/14/2017
240-558	Washington Zone 11
240-559	Ashton
240-560	Washington Zone 12	4/23/2001
240-561	Leonardtown	7/7/2008
240-562	Gaithersburg	6/12/2015
240-563	Washington Zone 5	7/5/2017
240-564	Laurel	12/21/2018
240-565	Laurel	12/30/2005
240-566	Frederick	6/11/2002
240-567	Washington Zone 10	7/12/2006
240-568	Laurel
240-569	Flintstone	9/22/2017
240-570	Ashton	2/24/2016
240-571	Laurel	1/14/2021
240-572	Leonardtown	11/15/2017
240-573	Washington Zone 15
240-574	Friendsville	8/27/2020
240-575	Frederick	12/30/2005
240-576	Hagerstown	12/20/2017
240-577	Leonardtown	8/9/2006
240-578	Frederick	7/8/2011
240-579	Ashton	1/11/2018
240-580	Cumberland	6/14/2001
240-581	Laurel
240-582	Washington Zone 4
240-583	Laurel	4/28/2010
240-584	Laurel	1/11/2018
240-585	Waldorf	6/29/2011
240-586	Frederick	12/22/2006
240-587	Leonardtown	7/6/2009
240-588	Grantsville	2/1/2018
240-589	Mccoole	3/7/2018
240-590	Washington Zone 12	4/9/2018
240-591	Hagerstown	4/17/2018
240-592	Washington Zone 13	7/1/2016
240-593	Laurel	3/13/2001
240-594	Bittinger	5/15/2018
240-595	Washington Zone 3	9/13/2006
240-596	Ashton	6/11/2018
240-597	Gaithersburg
240-598	Hughesville	6/11/2018
240-599	Washington Zone 10
240-600	Washington Zone 2	4/27/2011
240-601	Washington Zone 3
240-602	Washington Zone 3
240-603	Washington Zone 3
240-604	Washington Zone 3
240-605	Washington Zone 3
240-606	Washington Zone 3
240-607	Waldorf
240-608	Frederick	3/11/2013
240-609	Cumberland	9/11/2014
240-610	Washington Zone 4	6/11/2018
240-612	Washington Zone 5
240-613	Washington Zone 4	4/5/2012
240-614	Washington Zone 10	7/16/2013
240-615	Washington Zone 4	5/29/2013
240-616	Washington Zone 13
240-617	Highfield	7/16/2015
240-618	Washington Zone 10	10/7/2014
240-619	Washington Zone 5
240-620	Washington Zone 10
240-621	Washington Zone 11
240-622	La Plata	6/11/2018
240-623	Washington Zone 4	12/8/2014
240-624	Washington Zone 13
240-625	Hagerstown	4/17/2001
240-626	Frederick
240-627	Washington Zone 11
240-628	Mechanicsville	6/11/2018
240-629	Frederick
240-630	Washington Zone 2	10/31/2011
240-631	Gaithersburg
240-632	Gaithersburg
240-633	Hughesville	5/22/2015
240-634	Ridge	6/11/2018
240-635	Tompkinsville	6/11/2018
240-636	Laurel
240-637	Washington Zone 3	6/11/2018
240-638	Washington Zone 3
240-639	Laurel	6/1/2018
240-640	Waldorf	3/24/2009
240-641	Washington Zone 3
240-642	Washington Zone 10	8/2/2018
240-643	Washington Zone 3	5/16/2002
240-644	Washington Zone 2
240-645	Washington Zone 3
240-646	Laurel
240-647	Clear Spg	6/11/2018
240-648	Keedysville	6/12/2018
240-649	Smithsburg	6/12/2018
240-650	Washington Zone 3	11/17/2011
240-651	Frederick
240-652	Mechanicsville	2/13/2001
240-653	Laurel
240-654	Gaithersburg	5/19/2006
240-655	Kitzmiller	12/18/2017
240-656	Frederick	8/30/2019
240-657	Frostburg	1/6/2016
240-658	Gaithersburg	12/4/2018
240-659	Ashton	1/30/2019
240-660	Washington Zone 10	3/31/2015
240-661	Lexington Park-Great Mills	5/21/2015
240-662	Washington Zone 3
240-663	Middletown	1/30/2019
240-664	Cumberland	3/6/2019
240-665	Washington Zone 10	1/9/2017
240-666	Nanjemoy	6/25/2015
240-667	Washington Zone 4
240-668	Damascus
240-669	Washington Zone 11
240-670	Washington Zone 3	3/6/2012
240-671	Washington Zone 2
240-672	Washington Zone 10
240-673	Washington Zone 2	5/17/2019
240-674	Frederick
240-675	Myersville
240-676	Washington Zone 3
240-677	Washington Zone 5	5/20/2019
240-678	Washington Zone 3
240-679	Friendsville	6/11/2018
240-680	Frederick	10/29/2018
240-681	Brandywine	10/30/2003
240-682	Waldorf
240-683	Gaithersburg
240-684	Washington Zone 13
240-685	Brandywine
240-686	Gaithersburg
240-687	Washington Zone 3
240-688	Washington Zone 3	6/12/2006
240-689	Washington Zone 15	5/28/2019
240-690	Gaithersburg	11/10/2016
240-691	Washington Zone 5
240-692	Grantsville	5/30/2019
240-693	Walkersville	9/25/2019
240-694	Washington Zone 2
240-695	Washington Zone 5
240-696	Washington Zone 4
240-697	Mechanicsville	9/12/2019
240-698	Myersville	10/15/2019
240-699	Buckeyestown	5/22/2001
240-701	Washington Zone 3	3/25/2009
240-702	Gaithersburg	10/7/2014
240-703	Ashton	2/10/2021
240-704	Washington Zone 3	3/25/2009
240-705	Washington Zone 3	3/25/2009
240-706	Washington Zone 3	3/26/2009
240-707	Hagerstown	1/27/2012
240-708	Laurel	6/8/2012
240-709	Laurel	10/25/2019
240-710	Frederick	12/30/2019
240-712	Laurel	11/1/2011
240-713	Laurel	11/2/2011
240-714	Washington Zone 4	2/20/2015
240-715	Washington Zone 10
240-716	Washington Zone 5	11/15/2013
240-717	Leonardtown	4/22/2021
240-718	Lexington Park-Great Mills	2/13/2001
240-719	Washington Zone 5	4/11/2016
240-720	Gaithersburg
240-721	Washington Zone 5	3/19/2020
240-722	Ashton
240-723	Washington Zone 3
240-724	Washington Zone 6
240-725	Lexington Park-Great Mills
240-726	Washington Zone 4	9/1/2020
240-727	Cumberland
240-728	Washington Zone 10	5/12/2020
240-729	Ashton	6/16/2020
240-730	Hagerstown	8/12/2020
240-731	Washington Zone 10
240-732	Mount Airy	11/12/2015
240-733	Ashton	7/15/2020
240-734	Smithsburg	3/22/2012
240-735	Brunswick	9/1/2020
240-736	Laurel	9/2/2020
240-737	Washington Zone 4	5/9/2001
240-738	Hancock	9/3/2020
240-739	Frederick	9/15/2020
240-740	Washington Zone 10	9/3/2015
240-741	Frederick	10/1/2020
240-742	Washington Zone 14	11/20/2020
240-743	Washington Zone 2	11/16/2006
240-744	Washington Zone 2
240-745	Damascus
240-746	Brandywine	12/4/2020
240-747	Washington Zone 11	5/9/2001
240-748	Washington Zone 3	12/23/2020
240-749	Laurel	1/12/2021
240-750	Gaithersburg	5/6/2005
240-751	Gaithersburg
240-752	Washington Zone 2
240-753	Washington Zone 10
240-754	Waldorf	11/11/2011
240-755	Laurel	1/5/2006
240-756	Washington Zone 10	2/10/2021
240-757	Washington Zone 13
240-758	Laurel	3/3/2016
240-759	Washington Zone 15	3/25/2021
240-760	Washington Zone 2	9/22/2015
240-761	Laurel	7/20/2021
240-762	Washington Zone 2	8/22/2012
240-763	Washington Zone 15	10/1/2015
240-764	Washington Zone 4
240-765	Washington Zone 5
240-766	Washington Zone 6
240-767	Washington Zone 5	5/9/2001
240-768	Nanjemoy	4/22/2021
240-769	Keedysville	7/20/2021
240-770	Washington Zone 4	11/22/2004
240-771	Poolesville	2/18/2016
240-772	Frederick	11/17/2011
240-773	Washington Zone 10
240-774	Lonaconing	10/5/2015
240-775	Westernport	10/5/2015
240-776	La Plata
240-777	Washington Zone 10
240-778	Washington Zone 10
240-779	Ashton
240-780	Gaithersburg
240-781	Washington Zone 2	8/18/2015
240-782	Damascus
240-783	Washington Zone 2
240-784	Myersville	6/6/2001
240-785	Oakland	7/20/2021
240-786	Laurel
240-787	Brandywine
240-788	Washington Zone 5
240-789	Washington Zone 10	8/10/2021
240-790	Washington Zone 13
240-791	Washington Zone 4	8/11/2021
240-792	Frederick	8/11/2021
240-793	Gaithersburg	3/15/2001
240-794	Lexington Park-Great Mills
240-795	Washington Zone 5	8/12/2021
240-796	Washington Zone 10	8/25/2021
240-797	Ashton	8/25/2021
240-798	Gaithersburg	9/1/2021
240-799	Brandywine	6/26/2020
240-800	Washington Zone 2	6/22/2012
240-801	Gaithersburg	10/4/2013
240-802	Washington Zone 2	5/10/2013
240-803	Cumberland	1/27/2012
240-804	Tompkinsville	4/23/2001
240-805	Gaithersburg	11/17/2015
240-806	Indian Head	9/30/2015
240-807	Cumberland	9/1/2021
240-808	Leonardtown	3/31/2015
240-809	Smithsburg	9/1/2021
240-810	Washington Zone 10	4/5/2016
240-812	Poolesville
240-813	Gaithersburg
240-815	Frederick	11/17/2015
240-816	Keedysville	10/5/2015
240-817	Ashton	1/12/2016
240-818	Myersville
240-819	Williamsport	9/1/2021
240-820	Ashton	3/25/2021
240-821	Washington Zone 3	5/27/2005
240-822	New Market	3/15/2021
240-823	Brandywine	2/13/2001
240-824	Frostburg	3/15/2021
240-825	Washington Zone 4	3/17/2016
240-826	Washington Zone 10	5/7/2007
240-827	Lonaconing	9/1/2021
240-828	Washington Zone 4
240-829	Emmitsburg	9/12/2019
240-830	Washington Zone 5	11/10/2015
240-831	Frederick	4/26/2016
240-832	Washington Zone 2
240-833	Washington Zone 11
240-834	Kitzmiller	3/15/2021
240-835	Clear Spg	6/3/2021
240-836	Mt Savage	9/1/2021
240-837	Hughesville	2/13/2001
240-838	Washington Zone 5	3/12/2001
240-839	Washington Zone 3	1/13/2007
240-840	Frederick	6/19/2018
240-841	Laurel
240-842	Washington Zone 14
240-843	Washington Zone 13
240-844	Ridge	2/13/2001
240-845	Washington Zone 13
240-846	Washington Zone 16
240-847	Washington Zone 3	12/9/2015
240-848	Gaithersburg
240-849	Hagerstown	9/8/2021
240-850	Hagerstown	5/25/2016
240-851	Mccoole	7/16/2020
240-852	Myersville	9/13/2021
240-853	Laurel	9/28/2021
240-854	Washington Zone 4	12/7/2021
240-855	Washington Zone 2	10/9/2006
240-856	Laurel	4/11/2016
240-857	Washington Zone 5
240-858	Washington Zone 2	7/12/2016
240-859	Ashton	7/11/2016
240-860	Cumberland	8/23/2016
240-861	Ashton	10/7/2021
240-862	Mt Savage	9/2/2016
240-863	Washington Zone 3
240-864	Washington Zone 10	5/9/2001
240-865	Washington Zone 14
240-866	Hagerstown	9/20/2019
240-867	Washington Zone 3	6/20/2017
240-868	Washington Zone 12	5/9/2001
240-869	Washington Zone 10	10/7/2021
240-870	Middletown	9/2/2016
240-871	Lexington Park-Great Mills	10/7/2021
240-872	Washington Zone 6	10/7/2021
240-873	Buckeyestown	10/10/2019
240-874	Thurmont	10/10/2019
240-875	Mount Airy	10/10/2019
240-876	Washington Zone 2
240-877	Frederick	8/25/2016
240-878	Hagerstown	8/3/2017
240-879	Washington Zone 4	10/7/2021
240-880	Washington Zone 11
240-881	Washington Zone 13	11/4/2021
240-882	Washington Zone 5
240-883	Ashton
240-884	Tompkinsville	4/29/2021
240-885	Washington Zone 10	1/21/2021
240-886	Washington Zone 4	11/17/2021
240-887	Ashton	12/7/2021
240-888	Washington Zone 10
240-889	Washington Zone 10	12/6/2021
240-890	Washington Zone 5	12/7/2021
240-891	Damascus	12/10/2021
240-892	Washington Zone 15
240-893	Washington Zone 3
240-894	Lexington Park-Great Mills	12/10/2021
240-895	Lexington Park-Great Mills
240-896	Hagerstown	12/28/2021
240-897	Washington Zone 16
240-898	Washington Zone 4
240-899	Washington Zone 2	3/13/2001
240-900	Washington Zone 4	2/18/2015
240-901	La Plata	5/22/2014
240-902	Damascus	12/28/2021
240-903	Indian Head	12/3/2013
240-904	Laurel	6/23/2016
240-905	Brandywine	1/10/2022
240-906	Washington Zone 4
240-907	Washington Zone 10	7/12/2016
240-908	Walkersville	9/2/2016
240-909	Laurel	1/11/2022
240-910	Frederick	3/3/2021
240-912	Gaithersburg
240-913	Damascus	9/2/2016
240-914	Highfield	1/11/2022
240-915	New Market
240-916	Cumberland	1/11/2022
240-917	Laurel	11/12/2015
240-918	Ashton	10/20/2016
240-919	Ashton	1/26/2022
240-920	Cumberland	5/3/2001
240-921	Washington Zone 10	1/26/2022
240-922	Washington Zone 11	7/15/2020
240-923	Washington Zone 6	1/26/2022
240-924	Mount Airy	2/10/2022
240-925	Leonardtown	8/9/2001
240-929	Washington Zone 14
240-933	Buckeyestown	2/28/2022
240-934	Middletown	2/12/2021
240-938	Ashton	6/6/2001
240-942	Bittinger	3/15/2021
240-944	Westernport	3/15/2021
240-945	Washington Zone 3	11/6/2020
240-946	Washington Zone 14	10/25/2021
240-949	Washington Zone 16	5/9/2001
240-951	Hagerstown	3/24/2022
240-952	Hagerstown	3/24/2022
240-953	Hagerstown	3/24/2022
240-954	Hagerstown	3/24/2022
240-956	Washington Zone 2	11/6/2020
240-964	Cumberland	5/27/2008
240-965	Washington Zone 13
240-966	Washington Zone 16	2/25/2022
240-970	Washington Zone 12	6/2/2015
240-971	Frederick	8/2/2016
240-972	Laurel	5/26/2015
240-979	Cumberland
240-985	Williamsport	10/17/2016
240-986	Nanjemoy	2/13/2001
240-988	Washington Zone 3
240-993	Indian Head	2/13/2001
240-994	Washington Zone 10
240-995	Flintstone	5/8/2020
240-996	Brunswick	10/17/2016
240-997	Washington Zone 3
240-998	Hancock	10/17/2016

The NPA is the Numbering Plan Area (area code) and NXX is the central office code.
For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
The assignment date. If no date is shown the exchange code was assigned before 2001.

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List of cities in area code 240

City⁴	County	Time⁵
Abell	St Marys	E
Accident	Garrett	E
Accokeek	Prince George's	E
Adamstown	Frederick	E
Andrews Afb	Prince George's	E
Aquasco	Prince George's	E
Ashton	Montgomery	E
Avenue	St Marys	E
Barnesville	Montgomery	E
Barton	Allegany	E
Beallsville	Montgomery	E
Bel Alton	Charles	E
Beltsville	Prince George's	E
Benedict	Charles	E
Bethesda	Montgomery	E
Big Pool	Washington	E
Bittinger	Garrett	E
Bladensburg	Prince George's	E
Bloomington	Garrett	E
Boonsboro	Washington	E
Bowie	Prince George's	E
Boyds	Montgomery	E
Braddock Heights	Frederick	E
Brandywine	Prince George's	E
Brentwood	Prince George's	E
Brinklow	Montgomery	E
Brookeville	Montgomery	E
Brownsville	Washington	E
Brunswick	Frederick	E
Bryans Road	Charles	E
Bryantown	Charles	E
Buckeystown	Frederick	E
Burkittsville	Frederick	E
Burtonsville	Montgomery	E
Bushwood	St Marys	E
Cabin John	Montgomery	E
California	St Marys	E
Callaway	St Marys	E
Capitol Heights	Prince George's	E
Cascade	Washington	E
Cavetown	Washington	E
Chaptico	St Marys	E
Charlotte Hall	St Marys	E
Cheltenham	Prince George's	E
Chevy Chase	Montgomery	E
Chewsville	Washington	E
Clarksburg	Montgomery	E
Clear Spring	Washington	E
Clements	St Marys	E
Clinton	Prince George's	E
Cobb Island	Charles	E
College Park	Prince George's	E
Coltons Point	St Marys	E
Compton	St Marys	E
Corriganville	Allegany	E
Cumberland	Allegany	E
Damascus	Montgomery	E
Dameron	St Marys	E
Derwood	Montgomery	E
Dickerson	Montgomery	E
District Heights	Prince George's	E
Drayden	St Marys	E
Eckhart Mines	Allegany	E
Ellerslie	Allegany	E
Emmitsburg	Frederick	E
Fairplay	Washington	E
Faulkner	Charles	E
Flintstone	Allegany	E
Fort Washington	Prince George's	E
Frederick	Frederick	E
Friendship	Anne Arundel	E
Friendsville	Garrett	E
Frostburg	Allegany	E
Funkstown	Washington	E
Gaithersburg	Montgomery	E
Garrett Park	Montgomery	E
Germantown	Montgomery	E
Glen Echo	Montgomery	E
Glenn Dale	Prince George's	E
Grantsville	Garrett	E
Great Mills	St Marys	E
Greenbelt	Prince George's	E
Hagerstown	Washington	E
Hancock	Washington	E
Helen	St Marys	E
Highland	Howard	E
Hollywood	St Marys	E
Hughesville	Charles	E
Hyattsville	Prince George's	E
Ijamsville	Frederick	E
Indian Head	Charles	E
Ironsides	Charles	E
Issue	Charles	E
Jefferson	Frederick	E
Keedysville	Washington	E
Kensington	Montgomery	E
Kitzmiller	Garrett	E
Knoxville	Frederick	E
La Plata	Charles	E
Ladiesburg	Frederick	E
Lanham	Prince George's	E
Laurel	Anne Arundel	E
Leonardtown	St Marys	E
Lexington Park	St Marys	E
Libertytown	Frederick	E
Little Orleans	Allegany	E
Lonaconing	Allegany	E
Loveville	St Marys	E
Luke	Allegany	E
Marbury	Charles	E
Maugansville	Washington	E
Mc Henry	Garrett	E
Mechanicsville	St Marys	E
Middletown	Frederick	E
Midland	Allegany	E
Midlothian	Allegany	E
Monrovia	Frederick	E
Montgomery Village	Montgomery	E
Morganza	St Marys	E
Mount Airy	Frederick	E
Mount Rainier	Prince George's	E
Mount Savage	Allegany	E
Mount Victoria	Charles	E
Myersville	Frederick	E
Nanjemoy	Charles	E
New Market	Frederick	E
New Midway	Frederick	E
Newburg	Charles	E
Oakland	Garrett	E
Oldtown	Allegany	E
Olney	Montgomery	E
Owings	Calvert	E
Oxon Hill	Prince George's	E
Park Hall	St Marys	E
Patuxent River	St Marys	E
Piney Point	St Marys	E
Pinto	Allegany	E
Point Of Rocks	Frederick	E
Pomfret	Charles	E
Poolesville	Montgomery	E
Port Tobacco	Charles	E
Potomac	Montgomery	E
Rawlings	Allegany	E
Ridge	St Marys	E
Riverdale	Prince George's	E
Rock Point	Charles	E
Rockville	Montgomery	E
Rocky Ridge	Frederick	E
Rohrersville	Washington	E
Sabillasville	Frederick	E
Sandy Spring	Montgomery	E
Scotland	St Marys	E
Sharpsburg	Washington	E
Silver Spring	Montgomery	E
Smithsburg	Washington	E
Southern MD Facility	Prince George's	E
Spencerville	Montgomery	E
Spring Gap	Allegany	E
St Inigoes	St Marys	E
St James	Washington	E
St Marys City	St Marys	E
Suburb Maryland Fac	Montgomery	E
Suitland	Prince George's	E
Swanton	Garrett	E
Takoma Park	Montgomery	E
Tall Timbers	St Marys	E
Temple Hills	Prince George's	E
Thurmont	Frederick	E
Tuscarora	Frederick	E
Unionville	Frederick	E
Upper Marlboro	Prince George's	E
Valley Lee	St Marys	E
Waldorf	Charles	E
Walkersville	Frederick	E
Washington Grove	Montgomery	E
Welcome	Charles	E
Westernport	Allegany	E
White Plains	Charles	E
Williamsport	Washington	E
Woodsboro	Frederick	E

Listed in the table above are most, often not all places served by area code 240. When two or more places with the same name are located in the same state we list the largest one only. Cities with population over 50,000 are displayed in bold text.
E stands for Eastern Time (currently 10:03:52 AM).

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