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203 Area Code

Area code 203 is in Connecticut (CT), USA and some of its main locations are Bridgeport, New Haven, Stamford, etc. (jump to city list below).

Area code 203 has been in service since January 01, 1947 and is the older Numbering Plan Area in overlay complex 203/475 (overlaying area codes cover the same geographic area).

06:38:27 PM is the current time in area code 203 (Eastern Time Zone).

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203 phone number location

NPANXX Area served1 Date2
203-200 New Haven 8/14/2008
203-201 New Haven N/A
203-202 Darien N/A
203-204 Guilford N/A
203-205 Danbury N/A
203-206 Waterbury N/A
203-207 Danbury N/A
203-208 Branford N/A
203-209 Bridgeport N/A
203-210 Wilton N/A
203-212 Bridgeport 10/23/2008
203-213 Meriden N/A
203-214 New Haven N/A
203-215 New Haven N/A
203-216 Westport N/A
203-217 Waterbury N/A
203-218 Bridgeport N/A
203-219 Stamford N/A
203-220 Trumbull N/A
203-221 Westport N/A
203-222 Westport N/A
203-223 Stamford N/A
203-224 Bridgeport N/A
203-225 Huntington N/A
203-226 Westport N/A
203-227 Westport N/A
203-228 Waterbury 10/4/2002
203-229 Norwalk N/A
203-230 New Haven N/A
203-231 Ansonia/ Derby N/A
203-232 Waterbury N/A
203-233 Waterbury N/A
203-234 New Haven N/A
203-235 Meriden N/A
203-236 Waterbury N/A
203-237 Meriden N/A
203-238 Meriden N/A
203-239 New Haven N/A
203-240 Danbury N/A
203-241 Danbury N/A
203-242 Huntington N/A
203-243 Bridgeport N/A
203-244 Ridgefield 3/28/2003
203-245 Madison N/A
203-246 Norwalk N/A
203-247 Norwalk N/A
203-248 New Haven N/A
203-249 Stamford N/A
203-250 Cheshire N/A
203-251 Stamford N/A
203-252 Stamford N/A
203-253 Stamford N/A
203-254 Fairfield N/A
203-255 Fairfield N/A
203-256 Fairfield N/A
203-257 Bridgeport N/A
203-258 Bridgeport N/A
203-259 Fairfield N/A
203-260 Bridgeport N/A
203-261 Trumbull N/A
203-262 Woodbury N/A
203-263 Woodbury N/A
203-264 Woodbury N/A
203-265 Wallingford N/A
203-266 Woodbury N/A
203-267 Woodbury N/A
203-268 Trumbull N/A
203-269 Wallingford N/A
203-270 Newtown N/A
203-271 Cheshire N/A
203-272 Cheshire N/A
203-273 Stamford 10/22/2002
203-274 Stamford N/A
203-275 Bridgeport N/A
203-276 Stamford 3/28/2003
203-277 Old Greenwich 4/16/2003
203-278 Ansonia/ Derby 5/1/2001
203-279 Bridgeport N/A
203-280 Darien 3/24/2004
203-281 New Haven N/A
203-282 Stamford N/A
203-283 Milford N/A
203-284 Wallingford N/A
203-285 New Haven N/A
203-286 Norwalk N/A
203-287 New Haven N/A
203-288 New Haven N/A
203-289 Danbury N/A
203-290 Bridgeport 11/14/2013
203-291 Westport N/A
203-292 Fairfield N/A
203-293 Westport N/A
203-294 Wallingford N/A
203-295 Norwalk N/A
203-296 Bridgeport N/A
203-297 Danbury N/A
203-298 New Haven N/A
203-299 Norwalk N/A

NPANXX Area served1 Date2
203-300 Danbury 10/25/2001
203-301 Milford N/A
203-302 Greenwich N/A
203-303 Wallingford N/A
203-304 Newtown N/A
203-305 Ansonia/ Derby N/A
203-306 Milford N/A
203-307 Fairfield 1/31/2005
203-308 Ansonia/ Derby 10/22/2008
203-309 Darien 9/11/2007
203-310 New Canaan 4/16/2003
203-312 Danbury N/A
203-313 Danbury N/A
203-314 New Haven N/A
203-315 Branford N/A
203-316 Stamford N/A
203-317 Meriden N/A
203-318 Madison N/A
203-319 Fairfield N/A
203-320 Darien 4/16/2003
203-321 Stamford N/A
203-322 Stamford N/A
203-323 Stamford N/A
203-324 Stamford N/A
203-325 Stamford N/A
203-326 Stamford N/A
203-327 Stamford N/A
203-328 Stamford N/A
203-329 Stamford N/A
203-330 Bridgeport N/A
203-331 Bridgeport N/A
203-332 Bridgeport N/A
203-333 Bridgeport N/A
203-334 Bridgeport N/A
203-335 Bridgeport N/A
203-336 Bridgeport N/A
203-337 Bridgeport N/A
203-338 Bridgeport N/A
203-339 Bridgeport N/A
203-340 Greenwich 8/19/2003
203-341 Westport N/A
203-342 Bridgeport N/A
203-343 Ansonia/ Derby 1/18/2012
203-344 Old Greenwich N/A
203-345 Bridgeport N/A
203-346 Waterbury N/A
203-347 Byram 3/11/2004
203-348 Stamford N/A
203-349 Westport N/A
203-350 Madison N/A
203-351 Stamford N/A
203-352 Stamford N/A
203-353 Stamford N/A
203-354 Norwalk N/A
203-355 Stamford N/A
203-356 Stamford N/A
203-357 Stamford N/A
203-358 Stamford N/A
203-359 Stamford N/A
203-360 Bridgeport 12/10/2008
203-361 New Haven 12/16/2010
203-362 Bridgeport N/A
203-363 Stamford N/A
203-364 Newtown N/A
203-365 Bridgeport N/A
203-366 Bridgeport N/A
203-367 Bridgeport N/A
203-368 Bridgeport N/A
203-369 Old Greenwich 10/7/2003
203-370 New Haven N/A
203-371 Bridgeport N/A
203-372 Bridgeport N/A
203-373 Bridgeport N/A
203-374 Bridgeport N/A
203-375 Bridgeport N/A
203-376 New Haven N/A
203-377 Bridgeport N/A
203-378 Bridgeport N/A
203-379 Meriden N/A
203-380 Bridgeport N/A
203-381 Bridgeport N/A
203-382 Bridgeport N/A
203-383 Bridgeport N/A
203-384 Bridgeport N/A
203-385 Bridgeport N/A
203-386 Bridgeport N/A
203-387 New Haven N/A
203-388 Stamford N/A
203-389 New Haven N/A
203-390 New Haven 11/10/2015
203-391 Stamford N/A
203-392 New Haven N/A
203-393 New Haven N/A
203-394 Bridgeport N/A
203-395 Bridgeport N/A
203-396 Bridgeport N/A
203-397 New Haven N/A
203-398 Norwalk N/A
203-399 Stamford N/A

NPANXX Area served1 Date2
203-400 Trumbull 2/19/2002
203-401 New Haven N/A
203-402 Huntington N/A
203-403 Ridgefield N/A
203-404 New Haven N/A
203-405 Woodbury 4/4/2001
203-406 Stamford N/A
203-407 New Haven N/A
203-408 Redding N/A
203-409 Old Greenwich N/A
203-410 New Haven N/A
203-412 New Haven N/A
203-413 Greenwich N/A
203-414 Bridgeport N/A
203-415 New Haven 4/12/2001
203-416 Bridgeport N/A
203-417 Danbury N/A
203-418 Fairfield N/A
203-419 Waterbury N/A
203-420 Meriden N/A
203-421 Madison N/A
203-422 Greenwich N/A
203-423 Wilton N/A
203-424 Darien 6/29/2007
203-425 Stamford N/A
203-426 Newtown N/A
203-427 Meriden N/A
203-428 Stamford N/A
203-429 Westport N/A
203-430 New Haven N/A
203-431 Ridgefield N/A
203-432 New Haven N/A
203-433 Branford N/A
203-434 Norwalk N/A
203-435 New Haven N/A
203-436 New Haven N/A
203-437 Waterbury N/A
203-438 Ridgefield N/A
203-439 Cheshire N/A
203-440 Meriden N/A
203-441 Wolcott N/A
203-442 New Canaan N/A
203-443 Meriden N/A
203-444 New Haven N/A
203-445 Trumbull N/A
203-446 Ansonia/ Derby N/A
203-447 Huntington N/A
203-448 Danbury N/A
203-449 Bridgeport N/A
203-450 Bridgeport 5/12/2008
203-451 Westport N/A
203-452 Trumbull N/A
203-453 Guilford N/A
203-454 Westport N/A
203-455 Bridgeport N/A
203-456 Danbury 12/6/2011
203-457 Guilford N/A
203-458 Guilford N/A
203-459 Trumbull N/A
203-460 Danbury N/A
203-461 Stamford N/A
203-462 Stamford N/A
203-463 Seymour N/A
203-464 New Haven N/A
203-465 Waterbury N/A
203-466 New Haven N/A
203-467 New Haven N/A
203-468 New Haven N/A
203-469 New Haven N/A
203-470 Danbury N/A
203-477 New Haven N/A
203-479 New Haven N/A
203-480 Fairfield N/A
203-481 Branford N/A
203-482 Danbury 3/23/2001
203-483 Branford N/A
203-484 Branford N/A
203-485 Greenwich N/A
203-486 Woodbury N/A
203-487 Stamford 1/3/2001
203-488 Branford N/A
203-489 Greenwich 5/25/2011
203-490 Naugatuck N/A
203-491 Newtown 2/12/2010
203-492 New Haven N/A
203-493 Georgetown N/A
203-494 New Haven N/A
203-495 New Haven N/A
203-496 Greenwich N/A
203-497 New Haven N/A
203-498 New Haven N/A
203-499 New Haven N/A

NPANXX Area served1 Date2
203-500 New Haven 10/25/2001
203-501 Danbury 7/9/2010
203-502 Bridgeport N/A
203-503 New Haven N/A
203-504 Stamford 2/12/2004
203-505 Norwalk N/A
203-506 New Haven N/A
203-507 New Haven N/A
203-508 New Haven 2/3/2005
203-509 Waterbury N/A
203-510 Waterbury N/A
203-512 Danbury N/A
203-513 Huntington N/A
203-514 Meriden N/A
203-515 Norwalk N/A
203-516 Ansonia/ Derby N/A
203-517 Stamford N/A
203-518 Waterbury 7/2/2001
203-519 Waterbury 2/9/2011
203-520 Bridgeport 5/30/2002
203-521 Bridgeport N/A
203-522 Bridgeport N/A
203-523 Norwalk N/A
203-524 Stamford N/A
203-525 Waterbury N/A
203-526 Bridgeport N/A
203-527 Waterbury N/A
203-528 Waterbury N/A
203-529 Wilton N/A
203-530 New Haven N/A
203-531 Byram N/A
203-532 Byram N/A
203-533 Guilford N/A
203-534 Bridgeport N/A
203-535 New Haven N/A
203-536 Stamford N/A
203-537 Meriden N/A
203-538 Huntington N/A
203-539 Stamford N/A
203-540 Bridgeport 1/31/2005
203-541 Stamford N/A
203-542 Greenwich N/A
203-543 Bridgeport N/A
203-544 Georgetown N/A
203-545 Bridgeport N/A
203-546 Danbury N/A
203-547 Stamford N/A
203-548 Stamford 5/30/2002
203-549 Bridgeport N/A
203-550 Stamford N/A
203-551 Bridgeport N/A
203-552 Byram N/A
203-553 New Haven N/A
203-554 Stamford N/A
203-556 Bridgeport N/A
203-557 Westport N/A
203-558 Waterbury N/A
203-559 Darien N/A
203-560 Waterbury N/A
203-561 Stamford N/A
203-562 New Haven N/A
203-563 Wilton N/A
203-564 Stamford N/A
203-565 Waterbury N/A
203-566 Stamford 2/4/2003
203-567 Huntington N/A
203-568 Waterbury N/A
203-569 Stamford N/A
203-570 Stamford 3/26/2001
203-571 Westport N/A
203-572 Bridgeport 7/13/2007
203-573 Waterbury N/A
203-574 Waterbury N/A
203-575 Waterbury N/A
203-576 Bridgeport N/A
203-577 Waterbury N/A
203-578 Waterbury N/A
203-579 Bridgeport N/A
203-580 Byram 10/2/2012
203-581 Bridgeport N/A
203-582 New Haven N/A
203-583 Bridgeport N/A
203-584 New Haven 7/9/2010
203-585 Stamford N/A
203-586 Woodbury N/A
203-587 Georgetown N/A
203-588 Stamford N/A
203-589 New Haven N/A
203-590 Trumbull 3/18/2011
203-591 Waterbury N/A
203-592 Waterbury N/A
203-593 Norwalk N/A
203-594 New Canaan N/A
203-595 Stamford N/A
203-596 Waterbury N/A
203-597 Waterbury N/A
203-598 Waterbury N/A
203-599 Meriden N/A

NPANXX Area served1 Date2
203-600 Meriden 10/3/2008
203-601 Trumbull N/A
203-602 Stamford N/A
203-603 New Haven N/A
203-604 Norwalk 3/14/2001
203-605 New Haven N/A
203-606 New Haven N/A
203-607 Stamford 2/4/2003
203-608 Meriden N/A
203-609 Stamford N/A
203-610 Bridgeport N/A
203-612 Bridgeport N/A
203-613 Norwalk N/A
203-614 Stamford N/A
203-615 Bridgeport N/A
203-616 Danbury N/A
203-617 Danbury 9/5/2006
203-618 Greenwich N/A
203-619 New Haven N/A
203-620 Darien 7/19/2004
203-621 Darien N/A
203-622 Greenwich N/A
203-623 New Haven N/A
203-624 New Haven N/A
203-625 Greenwich N/A
203-626 Wallingford N/A
203-627 New Haven N/A
203-628 Danbury N/A
203-629 Greenwich N/A
203-630 Meriden N/A
203-631 Meriden N/A
203-632 Naugatuck N/A
203-633 Wolcott N/A
203-634 Meriden N/A
203-635 Westport N/A
203-636 Darien 9/14/2004
203-637 Old Greenwich N/A
203-638 Trumbull N/A
203-639 Meriden N/A
203-640 New Haven N/A
203-641 New Haven N/A
203-642 Norwalk N/A
203-643 Branford N/A
203-644 Norwalk N/A
203-645 New Haven N/A
203-646 Branford N/A
203-647 Milford N/A
203-648 Danbury N/A
203-649 Cheshire N/A
203-650 Bridgeport 3/26/2001
203-651 Cheshire N/A
203-652 New Canaan N/A
203-653 Stamford N/A
203-654 New Haven N/A
203-655 Darien N/A
203-656 Darien N/A
203-657 New Haven N/A
203-658 Stamford N/A
203-659 Fairfield N/A
203-660 Byram 1/3/2001
203-661 Greenwich N/A
203-662 Darien N/A
203-663 Norwalk N/A
203-664 Redding N/A
203-665 Wilton N/A
203-666 Bridgeport 9/26/2013
203-667 Stamford N/A
203-668 New Haven N/A
203-669 Darien N/A
203-670 Fairfield 12/6/2021
203-671 New Haven N/A
203-672 New Haven N/A
203-673 Bridgeport N/A
203-674 Stamford N/A
203-675 New Haven N/A
203-676 New Haven N/A
203-677 Wallingford N/A
203-678 Wallingford N/A
203-679 Wallingford N/A
203-680 New Haven 10/31/2012
203-681 Byram N/A
203-682 Westport N/A
203-683 Bridgeport N/A
203-684 New Haven 10/3/2008
203-685 Bridgeport 3/30/2001
203-686 Meriden N/A
203-687 New Haven N/A
203-688 New Haven N/A
203-689 Guilford N/A
203-690 Bridgeport 3/21/2008
203-691 New Haven N/A
203-692 Fairfield N/A
203-693 Milford 7/13/2010
203-694 Meriden N/A
203-695 Waterbury N/A
203-696 Bridgeport N/A
203-697 Wallingford N/A
203-698 Old Greenwich N/A
203-699 Cheshire N/A
NPANXX Area served1 Date2
203-701 Milford N/A
203-702 Danbury N/A
203-703 Stamford N/A
203-704 Wolcott 7/17/2002
203-705 Stamford N/A
203-706 Waterbury 2/12/2004
203-707 Waterbury 3/10/2011
203-708 Stamford N/A
203-709 Waterbury N/A
203-710 New Haven N/A
203-712 Huntington N/A
203-713 Milford N/A
203-714 Naugatuck N/A
203-715 Meriden N/A
203-716 New Canaan N/A
203-717 Greenwich 1/28/2011
203-718 Cheshire N/A
203-719 Stamford N/A
203-720 Naugatuck N/A
203-721 Waterbury N/A
203-722 Norwalk N/A
203-723 Naugatuck N/A
203-724 Stamford N/A
203-725 Waterbury N/A
203-726 Bridgeport 9/8/2010
203-727 Bridgeport 6/5/2001
203-728 Stamford 11/22/2006
203-729 Naugatuck N/A
203-730 Danbury N/A
203-731 Danbury N/A
203-732 Ansonia/ Derby N/A
203-733 Danbury N/A
203-734 Ansonia/ Derby N/A
203-735 Ansonia/ Derby N/A
203-736 Ansonia/ Derby N/A
203-737 New Haven N/A
203-738 Guilford N/A
203-739 Danbury N/A
203-740 Danbury N/A
203-741 Wallingford N/A
203-742 Greenwich 4/10/2003
203-743 Danbury N/A
203-744 Danbury N/A
203-745 New Haven N/A
203-746 Danbury N/A
203-747 New Haven N/A
203-748 Danbury N/A
203-749 Danbury N/A
203-750 Norwalk N/A
203-751 Ansonia/ Derby N/A
203-752 New Haven N/A
203-753 Waterbury N/A
203-754 Waterbury N/A
203-755 Waterbury N/A
203-756 Waterbury N/A
203-757 Waterbury N/A
203-758 Waterbury N/A
203-759 Waterbury N/A
203-760 Bridgeport 4/16/2012
203-761 Wilton N/A
203-762 Wilton N/A
203-763 Fairfield N/A
203-764 New Haven N/A
203-765 New Haven N/A
203-766 New Haven N/A
203-767 Bridgeport N/A
203-768 Waterbury N/A
203-769 Greenwich N/A
203-770 Danbury N/A
203-771 New Haven N/A
203-772 New Haven N/A
203-773 New Haven N/A
203-774 Wallingford N/A
203-775 Danbury N/A
203-776 New Haven N/A
203-777 New Haven N/A
203-778 Danbury N/A
203-779 Madison N/A
203-780 New Haven 10/2/2012
203-781 New Haven N/A
203-782 New Haven N/A
203-783 Milford N/A
203-784 New Haven N/A
203-785 New Haven N/A
203-786 New Haven N/A
203-787 New Haven N/A
203-788 Danbury N/A
203-789 New Haven N/A
203-790 Danbury N/A
203-791 Danbury N/A
203-792 Danbury N/A
203-793 Wallingford 3/23/2001
203-794 Danbury N/A
203-795 New Haven N/A
203-796 Danbury N/A
203-797 Danbury N/A
203-798 Danbury N/A
203-799 New Haven N/A
NPANXX Area served1 Date2
203-800 New Haven 3/10/2011
203-801 New Canaan N/A
203-802 Waterbury 10/3/2008
203-803 Norwalk N/A
203-804 New Haven N/A
203-805 Waterbury N/A
203-806 Cheshire N/A
203-807 Norwalk 1/30/2001
203-808 Waterbury 5/30/2002
203-809 New Haven 11/4/2002
203-810 Norwalk 7/27/2001
203-812 New Haven N/A
203-813 Byram N/A
203-814 Bridgeport N/A
203-815 New Haven N/A
203-816 Trumbull 3/14/2001
203-817 Stamford N/A
203-818 Norwalk N/A
203-819 Waterbury N/A
203-820 Norwalk N/A
203-821 New Haven N/A
203-822 Norwalk N/A
203-823 New Haven N/A
203-824 New Haven N/A
203-825 Danbury N/A
203-826 Danbury N/A
203-827 Old Greenwich 7/19/2004
203-828 Seymour N/A
203-829 Norwalk N/A
203-830 Danbury N/A
203-831 Norwalk N/A
203-832 Stamford 4/6/2006
203-833 New Haven 7/29/2015
203-834 Wilton N/A
203-835 Norwalk N/A
203-836 New Haven 12/6/2011
203-837 Danbury N/A
203-838 Norwalk N/A
203-839 Norwalk N/A
203-840 Norwalk N/A
203-841 Waterbury N/A
203-842 Norwalk N/A
203-843 New Haven N/A
203-844 Fairfield 8/16/2004
203-845 Norwalk N/A
203-846 Norwalk N/A
203-847 Norwalk N/A
203-848 New Haven N/A
203-849 Norwalk N/A
203-850 New Haven 10/3/2008
203-851 Norwalk N/A
203-852 Norwalk N/A
203-853 Norwalk N/A
203-854 Norwalk N/A
203-855 Norwalk N/A
203-856 Norwalk N/A
203-857 Norwalk N/A
203-858 Norwalk N/A
203-859 New Haven N/A
203-861 Greenwich N/A
203-862 Greenwich N/A
203-863 Greenwich N/A
203-864 Bridgeport 3/7/2011
203-865 New Haven N/A
203-866 Norwalk N/A
203-867 New Haven N/A
203-868 New Haven N/A
203-869 Greenwich N/A
203-870 Bridgeport N/A
203-871 Branford N/A
203-872 Cheshire N/A
203-873 Bridgeport 2/7/2007
203-874 Milford N/A
203-875 Darien N/A
203-876 Milford N/A
203-877 Milford N/A
203-878 Milford N/A
203-879 Wolcott N/A
203-880 Trumbull N/A
203-881 Seymour N/A
203-882 Milford N/A
203-883 Stamford N/A
203-884 Guilford N/A
203-885 Danbury 10/30/2006
203-886 Meriden N/A
203-887 New Haven N/A
203-888 Seymour N/A
203-889 New Haven N/A
203-890 Stamford 7/27/2001
203-891 New Haven N/A
203-892 Ansonia/ Derby 11/8/2010
203-893 Ansonia/ Derby 6/29/2007
203-894 Ridgefield N/A
203-895 Trumbull N/A
203-896 Madison N/A
203-897 Stamford 8/20/2008
203-898 Darien 1/31/2005
203-899 Norwalk N/A

NPANXX Area served1 Date2
203-900 Greenwich 2/24/2012
203-901 New Haven N/A
203-902 New Haven N/A
203-903 New Haven N/A
203-904 Norwalk N/A
203-905 Stamford N/A
203-906 Ansonia/ Derby 4/23/2002
203-907 New Haven N/A
203-908 Bridgeport 4/5/2006
203-909 New Haven 5/13/2008
203-910 Waterbury N/A
203-912 Stamford N/A
203-913 Bridgeport N/A
203-914 Stamford 2/24/2012
203-915 New Haven N/A
203-916 Bridgeport 1/30/2001
203-917 Danbury 10/22/2008
203-918 Stamford N/A
203-919 Norwalk N/A
203-920 New Canaan 2/20/2004
203-921 Stamford N/A
203-922 Huntington N/A
203-923 Bridgeport N/A
203-924 Huntington N/A
203-925 Huntington N/A
203-926 Huntington N/A
203-927 New Haven N/A
203-928 New Haven N/A
203-929 Huntington N/A
203-930 Greenwich 3/14/2001
203-931 New Haven N/A
203-932 New Haven N/A
203-933 New Haven N/A
203-934 New Haven N/A
203-935 Meriden N/A
203-936 New Haven 9/12/2008
203-937 New Haven N/A
203-938 Redding N/A
203-939 Norwalk 6/25/2008
203-940 Stamford N/A
203-941 Seymour 9/21/2010
203-942 Danbury N/A
203-943 Norwalk N/A
203-944 Huntington N/A
203-945 Norwalk N/A
203-946 New Haven N/A
203-947 Danbury N/A
203-948 Danbury N/A
203-949 Wallingford N/A
203-951 Milford N/A
203-952 Norwalk N/A
203-953 Bridgeport 7/27/2001
203-954 Ansonia/ Derby N/A
203-955 Fairfield 2/20/2004
203-956 Norwalk 1/30/2001
203-957 Norwalk 5/25/2011
203-960 Stamford 9/15/2008
203-961 Stamford N/A
203-962 Stamford N/A
203-963 Norwalk N/A
203-964 Stamford N/A
203-965 Stamford N/A
203-966 New Canaan N/A
203-967 Stamford N/A
203-968 Stamford N/A
203-969 Stamford N/A
203-970 Norwalk 4/4/2011
203-971 Greenwich N/A
203-972 New Canaan N/A
203-973 Stamford N/A
203-974 New Haven N/A
203-975 Stamford N/A
203-977 Stamford N/A
203-978 Stamford N/A
203-979 Stamford N/A
203-980 New Haven 8/20/2002
203-981 Norwalk N/A
203-982 Waterbury N/A
203-983 Greenwich N/A
203-984 Norwalk N/A
203-985 New Haven N/A
203-986 Old Greenwich 2/20/2004
203-987 Greenwich 3/30/2001
203-988 New Haven N/A
203-989 Stamford N/A
203-990 Old Greenwich 1/31/2005
203-991 Norwalk N/A
203-992 Greenwich 5/12/2006
203-993 Bridgeport 7/20/2006
203-994 Danbury 12/14/2001
203-995 Bridgeport 10/8/2008
203-996 New Haven 12/14/2001
203-997 Ansonia/ Derby 5/18/2011
203-998 Stamford 10/15/2004
203-999 New Haven 3/9/2011
  1. 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.
  2. Assignment date. N/A - mostly CO codes assigned before 2001.
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Cities in area code 203

City1 County Time2
Ansonia New Haven E
Beacon Falls New Haven E
Bethany New Haven E
Bethel Fairfield E
Bethlehem Litchfield E
Botsford Fairfield E
Branford New Haven E
Bridgeport Fairfield E
Brookfield Fairfield E
Cheshire New Haven E
Cos Cob Fairfield E
Danbury Fairfield E
Darien Fairfield E
Derby New Haven E
East Haven New Haven E
Easton Fairfield E
Fairfield Fairfield E
Georgetown Fairfield E
Greens Farms Fairfield E
Greenwich Fairfield E
Guilford New Haven E
Hamden New Haven E
Hawleyville Fairfield E
Madison New Haven E
Meriden New Haven E
Middlebury New Haven E
Milford New Haven E
Monroe Fairfield E
Naugatuck New Haven E
New Canaan Fairfield E
New Fairfield Fairfield E
New Haven New Haven E
Newtown Fairfield E
North Branford New Haven E
North Haven New Haven E
Northford New Haven E
Norwalk Fairfield E
Old Greenwich Fairfield E
Orange New Haven E
Oxford New Haven E
Prospect New Haven E
Redding Fairfield E
Redding Center Fairfield E
Redding Ridge Fairfield E
Ridgefield Fairfield E
Riverside Fairfield E
Roxbury Litchfield E
Sandy Hook Fairfield E
Seymour New Haven E
Shelton Fairfield E
Sherman Fairfield E
South Britain New Haven E
Southbury New Haven E
Southport Fairfield E
Stamford Fairfield E
Stevenson Fairfield E
Stratford Fairfield E
Trumbull Fairfield E
Wallingford New Haven E
Waterbury New Haven E
West Haven New Haven E
Weston Fairfield E
Westport Fairfield E
Wilton Fairfield E
Wolcott New Haven E
Woodbridge New Haven E
Woodbury Litchfield E
  1. Listed above are most places served by area code 203. When multiple places in a state/province share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. E stands for Eastern Time Zone (currently 06:38:27 PM).
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