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Area Code 631

Area code 631 is in New York, USA , spanning 1 county and serving 106 cities, including Brentwood, West Babylon or Coram; it currently uses 777 prefixes, assigned from 631-200-XXXX through 631-998-XXXX.

In service since November 01, 1999, area code 631 is the parent Numbering Plan Area in overlay complex 631/934.

The current local time is .

631 area code location on a map

© OpenStreetMap contributors
For exact boundaries see official 631 area code map

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Locate any 631-NXX prefix:

NPANXX Area served1 Date2
631-200 Bayport 12/8/2003
631-201 Amityville 2/8/2016
631-202 Ronkonkoma 2/9/2016
631-203 Central Islip N/A
631-204 Southampton N/A
631-205 Yaphank N/A
631-206 Bay Shore N/A
631-207 Patchogue N/A
631-208 Riverhead N/A
631-209 Shoreham N/A
631-210 Islip N/A
631-212 Commack 2/15/2016
631-213 Midland N/A
631-214 Deer Park 5/21/2015
631-215 Brentwood 4/22/2016
631-216 Stony Brook N/A
631-217 Stony Brook N/A
631-218 Sayville N/A
631-219 Brentwood 10/13/2003
631-220 Brentwood N/A
631-221 Nassau Zone 09 N/A
631-223 Huntington N/A
631-224 Islip N/A
631-225 Lindenhst N/A
631-226 Lindenhst N/A
631-227 Farmingdale N/A
631-228 Shoreham N/A
631-229 Amityville N/A
631-230 Montauk Point 9/6/2012
631-231 Brentwood N/A
631-232 Central Islip N/A
631-233 Brentwood N/A
631-234 Central Islip N/A
631-235 Brentwood 10/18/2002
631-236 Brentwood N/A
631-237 Bridgehampton 9/25/2001
631-238 Montauk Point 9/25/2001
631-239 Northport N/A
631-240 Smithtown 10/30/2001
631-241 Brentwood 6/5/2003
631-242 Deer Park N/A
631-243 Deer Park N/A
631-244 Sayville N/A
631-245 Brentwood 8/16/2005
631-246 Stony Brook N/A
631-247 Farmingdale N/A
631-248 East Hampton 9/6/2012
631-249 Farmingdale N/A
631-250 St James 4/9/2013
631-251 Sag Harbor N/A
631-252 Brentwood 2/4/2003
631-253 Midland N/A
631-254 Deer Park N/A
631-255 Riverhead 7/22/2002
631-256 Sayville N/A
631-257 Smithtown 5/30/2012
631-258 Brentwood 8/15/2002
631-259 Southampton N/A
631-260 Brentwood 8/28/2014
631-261 Northport N/A
631-262 Northport N/A
631-263 Smithtown N/A
631-264 Amityville N/A
631-265 Smithtown N/A
631-266 West Commack N/A
631-267 Amagansett N/A
631-268 Southampton 4/4/2013
631-269 Kings Park N/A
631-270 Farmingdale N/A
631-271 Huntington N/A
631-272 Central Islip N/A
631-273 Brentwood N/A
631-274 Deer Park N/A
631-275 Brentwood 7/10/2003
631-276 Hampton Bays 10/21/2002
631-277 Islip N/A
631-278 Brentwood 10/21/2003
631-279 Brentwood N/A
631-280 Brentwood N/A
631-281 Atlantic N/A
631-282 Yaphank N/A
631-283 Southampton N/A
631-284 Riverhead N/A
631-285 Ronkonkoma N/A
631-286 Bellport N/A
631-287 Southampton N/A
631-288 Westhampton N/A
631-289 Patchogue N/A
631-290 Babylon 7/29/2015
631-291 Brentwood 7/23/2003
631-292 Kings Park N/A
631-293 Farmingdale N/A
631-294 Yaphank 10/21/2002
631-295 Yaphank N/A
631-296 Bridgehampton 6/28/2013
631-297 Central Islip N/A
631-298 Mattituck N/A
631-299 Brentwood N/A

NPANXX Area served1 Date2
631-300 Brentwood N/A
631-301 Farmingdale 12/5/2016
631-302 East Fire Island N/A
631-303 Amityville 9/1/2017
631-304 Brentwood 10/13/2015
631-305 Brentwood 2/1/2016
631-306 Deer Park N/A
631-307 Patchogue 8/2/2013
631-308 Brentwood 1/8/2020
631-309 Amityville 4/13/2018
631-310 Patchogue 1/24/2017
631-312 Patchogue N/A
631-313 Islip 6/14/2018
631-314 Babylon N/A
631-315 Mattituck 12/16/2006
631-316 Brentwood 2/21/2007
631-317 Patchogue 12/4/2009
631-318 Amagansett 1/27/2010
631-319 Sayville 2/3/2006
631-320 Selden 8/21/2006
631-321 Babylon N/A
631-322 Brentwood N/A
631-323 Orient N/A
631-324 East Hampton N/A
631-325 Eastport N/A
631-326 Commack N/A
631-327 Huntington 8/27/2002
631-328 Bay Shore N/A
631-329 East Hampton N/A
631-330 Farmingdale 9/30/2011
631-331 Port Jefferson N/A
631-332 Brentwood 2/15/2002
631-333 Greenport 5/5/2009
631-334 Central Islip N/A
631-335 Brentwood 7/10/2003
631-336 Brentwood 6/1/2010
631-337 Sayville N/A
631-338 Brentwood 2/18/2004
631-339 Brentwood 2/12/2010
631-340 Babylon N/A
631-341 Yaphank N/A
631-342 Central Islip N/A
631-343 Commack 9/10/2003
631-344 Yaphank N/A
631-345 Yaphank N/A
631-346 Selden 8/19/2010
631-347 Brentwood 12/15/2023
631-348 Central Islip N/A
631-349 Stony Brook 9/13/2002
631-350 Huntington N/A
631-351 Huntington N/A
631-352 Smithtown 8/20/2010
631-353 Southampton 8/26/2010
631-354 Mattituck N/A
631-355 Brentwood 8/21/2003
631-356 Brentwood 8/21/2003
631-357 Brentwood N/A
631-358 Babylon 9/10/2010
631-359 Wading River 9/6/2012
631-360 Smithtown N/A
631-361 Smithtown N/A
631-363 Bayport N/A
631-364 Stony Brook 11/8/2010
631-365 Brentwood 9/10/2003
631-366 Smithtown N/A
631-367 Cold Spring Harbor N/A
631-368 West Commack N/A
631-369 Riverhead N/A
631-370 Farmingdale N/A
631-371 Stony Brook 6/17/2002
631-372 Brentwood 12/18/2014
631-373 Brentwood N/A
631-374 Brentwood 11/14/2001
631-375 Riverhead 11/14/2001
631-376 Babylon N/A
631-377 Southampton 11/21/2006
631-378 Shoreham N/A
631-379 Brentwood 1/9/2002
631-380 Stony Brook N/A
631-381 Riverhead 6/7/2016
631-382 Smithtown N/A
631-383 Bay Shore 6/17/2002
631-384 Selden 5/14/2002
631-385 Huntington N/A
631-386 Farmingdale N/A
631-387 Commack N/A
631-388 Brentwood 10/25/2010
631-389 Ronkonkoma N/A
631-390 Farmingdale N/A
631-391 Farmingdale N/A
631-392 Deer Park 2/14/2006
631-393 Farmingdale N/A
631-394 Yaphank 10/26/2010
631-395 Atlantic N/A
631-396 Farmingdale N/A
631-397 Amityville 2/12/2010
631-398 Brentwood N/A
631-399 Atlantic N/A

NPANXX Area served1 Date2
631-400 Center Moriches N/A
631-401 Brentwood 1/13/2020
631-402 Brentwood 2/1/2012
631-403 Port Jefferson 8/23/2006
631-404 Brentwood N/A
631-405 Riverhead 2/22/2011
631-406 Smithtown N/A
631-407 Southold 3/21/2011
631-408 Amityville 2/6/2012
631-409 Nassau Zone 09 N/A
631-410 Commack N/A
631-412 Lindenhst N/A
631-413 Selden 2/8/2006
631-414 Farmingdale N/A
631-415 Central Islip N/A
631-416 Brentwood 7/11/2011
631-417 Babylon 10/10/2011
631-418 Huntington 5/3/2001
631-419 Bayport N/A
631-420 Farmingdale N/A
631-421 Huntington N/A
631-422 Babylon N/A
631-423 Huntington N/A
631-424 Huntington N/A
631-425 Huntington N/A
631-426 Babylon N/A
631-427 Huntington N/A
631-428 Ronkonkoma 4/4/2001
631-429 Lindenhst 9/6/2012
631-430 Greenport 4/3/2013
631-431 Central Islip N/A
631-432 Brentwood 8/2/2013
631-433 Brentwood 6/26/2002
631-434 Brentwood N/A
631-435 Brentwood N/A
631-436 Brentwood N/A
631-437 Fire Island 10/8/2013
631-438 Patchogue 5/3/2011
631-439 Central Islip N/A
631-440 Fire Island N/A
631-441 Brentwood N/A
631-442 Brentwood N/A
631-443 Eastport N/A
631-444 Stony Brook N/A
631-445 Brentwood 3/15/2001
631-446 Islip 6/7/2007
631-447 Patchogue N/A
631-448 Yaphank 8/10/2011
631-449 Brentwood 6/14/2013
631-450 Lindenhst 3/2/2012
631-451 Selden N/A
631-452 Central Islip 9/8/2015
631-453 Selden N/A
631-454 Farmingdale N/A
631-455 Deer Park N/A
631-456 Brentwood 2/9/2005
631-457 Brentwood N/A
631-458 Sag Harbor N/A
631-459 Brentwood 1/27/2012
631-460 Kings Park N/A
631-461 Riverhead 9/13/2011
631-462 West Commack N/A
631-463 Central Islip N/A
631-464 Amityville 6/9/2011
631-465 Farmingdale N/A
631-466 Riverhead N/A
631-467 Ronkonkoma N/A
631-468 Ronkonkoma N/A
631-469 Brentwood 4/24/2018
631-470 Huntington N/A
631-471 Ronkonkoma N/A
631-472 Bayport N/A
631-473 Port Jefferson N/A
631-474 Port Jefferson N/A
631-475 Patchogue N/A
631-476 Port Jefferson N/A
631-477 Greenport N/A
631-478 Brentwood N/A
631-479 Huntington N/A
631-480 Amityville 3/9/2012
631-481 Islip N/A
631-482 Babylon 3/29/2007
631-483 Montauk Point 2/3/2012
631-484 Brentwood 12/31/2001
631-485 Midland N/A
631-486 West Commack N/A
631-487 Brentwood 7/18/2006
631-488 Southampton 8/21/2007
631-489 West Commack N/A
631-490 Atlantic 3/16/2012
631-491 Midland N/A
631-492 Deer Park N/A
631-493 West Commack N/A
631-494 Riverhead 4/21/2009
631-495 Brentwood N/A
631-496 Selden 2/20/2012
631-497 Yaphank N/A
631-498 Cold Spring Harbor N/A
631-499 West Commack N/A

NPANXX Area served1 Date2
631-500 Water Mill N/A
631-501 Farmingdale N/A
631-502 Jamesport 3/16/2012
631-503 Center Moriches N/A
631-504 Yaphank 5/23/2006
631-505 Lindenhst 2/24/2010
631-506 Riverhead N/A
631-507 Amityville 6/27/2013
631-508 Riverhead 3/13/2018
631-509 Port Jefferson 8/21/2006
631-510 Midland N/A
631-512 Selden 2/8/2006
631-513 Brentwood N/A
631-514 Brentwood N/A
631-515 Shelter Island 10/31/2012
631-517 Babylon N/A
631-518 Bay Shore 4/3/2013
631-519 East Fire Island 4/3/2013
631-520 Amityville N/A
631-521 Brentwood N/A
631-522 Deer Park 4/2/2009
631-523 Central Islip N/A
631-524 Brentwood 7/18/2011
631-525 Brentwood 11/4/2003
631-526 Babylon 10/22/2012
631-527 East Hampton 6/3/2011
631-528 Kings Park N/A
631-529 Orient N/A
631-530 Amityville 11/24/2015
631-531 Farmingdale N/A
631-532 Amityville N/A
631-533 Central Islip 2/9/2009
631-534 Cold Spring Harbor N/A
631-535 Port Jefferson 9/6/2012
631-536 Eastport N/A
631-537 Bridgehampton N/A
631-538 Selden 8/2/2013
631-539 Babylon N/A
631-540 Mattituck 5/12/2020
631-541 Nassau Zone 09 N/A
631-542 Ronkonkoma 3/16/2012
631-543 Commack N/A
631-544 Kings Park N/A
631-545 Amityville 8/20/2012
631-546 Huntington N/A
631-547 Huntington N/A
631-548 Riverhead N/A
631-549 Huntington N/A
631-550 Yaphank 3/4/2020
631-551 St James N/A
631-552 Amityville 8/22/2013
631-553 Brentwood N/A
631-554 Brentwood N/A
631-556 Brentwood 11/15/2005
631-557 Amagansett 6/9/2014
631-558 Riverhead N/A
631-559 Brentwood 3/30/2006
631-560 Brentwood 9/19/2006
631-561 Selden N/A
631-562 Patchogue 10/6/2011
631-563 Sayville N/A
631-564 Sayville N/A
631-565 Amityville 5/19/2009
631-566 Riverhead 1/5/2006
631-567 Sayville N/A
631-568 Amityville 11/13/2013
631-569 Patchogue 5/19/2006
631-570 Fire Island N/A
631-571 Orient 4/3/2013
631-572 Babylon 5/27/2009
631-573 Sayville 10/6/2011
631-574 Riverhead N/A
631-575 Brentwood 9/30/2008
631-576 Patchogue N/A
631-577 Farmingdale N/A
631-578 Yaphank 4/26/2007
631-579 Brentwood 11/14/2008
631-580 Ronkonkoma N/A
631-581 Islip N/A
631-582 Central Islip N/A
631-583 Fire Island N/A
631-584 St James N/A
631-585 Ronkonkoma N/A
631-586 Deer Park N/A
631-587 Babylon N/A
631-588 Ronkonkoma N/A
631-589 Sayville N/A
631-590 Ronkonkoma N/A
631-591 Riverhead N/A
631-592 Lindenhst N/A
631-593 Greenport N/A
631-594 Hampton Bays 3/15/2001
631-595 Deer Park N/A
631-596 Quogue 1/13/2006
631-597 East Fire Island N/A
631-598 Amityville N/A
631-599 Riverhead N/A

NPANXX Area served1 Date2
631-600 West Commack N/A
631-601 Brentwood 11/29/2012
631-602 Shelter Island 2/3/2006
631-603 Riverhead N/A
631-604 East Hampton 1/11/2006
631-605 Patchogue 5/13/2009
631-606 Northport 4/17/2009
631-607 Wading River 9/6/2018
631-608 Amityville N/A
631-609 Brentwood 9/8/2008
631-610 Eastport N/A
631-612 Babylon N/A
631-613 Bridgehampton N/A
631-614 Southampton N/A
631-615 Ronkonkoma N/A
631-616 Peconic 1/13/2006
631-617 Brentwood 8/21/2006
631-618 Yaphank N/A
631-619 Ronkonkoma N/A
631-620 Babylon 6/22/2011
631-621 St James N/A
631-622 Farmingdale N/A
631-623 West Commack N/A
631-624 Brentwood 6/30/2008
631-625 Orient 2/3/2006
631-626 Brentwood 5/12/2008
631-627 Patchogue 11/3/2005
631-628 Northport N/A
631-629 Huntington 10/31/2007
631-630 Central Islip N/A
631-631 Fire Island 10/11/2022
631-632 Stony Brook N/A
631-633 Bellport 3/3/2014
631-634 Commack 10/9/2019
631-635 Babylon N/A
631-636 Brentwood 12/15/2014
631-637 Brentwood 4/28/2014
631-638 Stony Brook 10/5/2005
631-639 Brentwood N/A
631-640 Amityville 3/28/2017
631-641 Water Mill N/A
631-642 Port Jefferson N/A
631-643 Midland N/A
631-644 Riverhead 10/14/2014
631-645 Brentwood N/A
631-646 Sayville 5/28/2020
631-647 Bay Shore N/A
631-648 Ronkonkoma N/A
631-649 Babylon N/A
631-650 Islip N/A
631-651 Northport N/A
631-652 Smithtown 1/13/2014
631-653 Quogue N/A
631-654 Patchogue N/A
631-655 Riverhead N/A
631-656 Smithtown N/A
631-657 Atlantic N/A
631-658 East Hampton 7/11/2013
631-659 Cold Spring Harbor N/A
631-660 Riverhead N/A
631-661 Babylon N/A
631-662 Huntington 10/25/2002
631-663 Kings Park N/A
631-664 Central Islip N/A
631-665 Bay Shore N/A
631-666 Bay Shore N/A
631-667 Deer Park N/A
631-668 Montauk Point N/A
631-669 Babylon N/A
631-670 Commack N/A
631-671 Lindenhst 6/17/2002
631-672 Smithtown 6/17/2002
631-673 Huntington N/A
631-674 Midland N/A
631-675 Stony Brook N/A
631-676 Ronkonkoma 8/20/2004
631-677 Sayville N/A
631-678 Brentwood N/A
631-679 Nassau Zone 09 N/A
631-680 Riverhead 2/14/2001
631-681 Selden 11/8/2004
631-682 Selden 3/14/2002
631-683 Huntington N/A
631-684 Westhampton 6/23/2001
631-685 Hampton Bays N/A
631-686 St James N/A
631-687 Patchogue N/A
631-688 Farmingdale N/A
631-689 Stony Brook N/A
631-690 Patchogue 10/15/2018
631-691 Amityville N/A
631-692 Cold Spring Harbor N/A
631-693 Amityville N/A
631-694 Farmingdale N/A
631-695 Brentwood N/A
631-696 Selden N/A
631-697 Huntington 1/16/2002
631-698 Selden N/A
631-699 Sayville N/A

NPANXX Area served1 Date2
631-701 Eastport N/A
631-702 Southampton N/A
631-703 Amityville 8/8/2005
631-704 Brentwood 8/16/2005
631-705 Atlantic 2/16/2016
631-706 Stony Brook N/A
631-707 Brentwood 3/10/2005
631-708 Brentwood N/A
631-709 Water Mill 8/17/2004
631-710 Ronkonkoma 6/6/2018
631-712 Farmingdale N/A
631-713 Eastport N/A
631-714 Patchogue 10/11/2004
631-715 Central Islip N/A
631-716 Selden N/A
631-717 Bayport 4/29/2021
631-719 Farmingdale N/A
631-720 Brentwood 5/14/2020
631-721 Selden N/A
631-722 Jamesport N/A
631-723 Hampton Bays N/A
631-724 Smithtown N/A
631-725 Sag Harbor N/A
631-726 Water Mill N/A
631-727 Riverhead N/A
631-728 Hampton Bays N/A
631-729 Atlantic N/A
631-730 Patchogue N/A
631-731 Amagansett N/A
631-732 Selden N/A
631-733 Brentwood N/A
631-734 Peconic N/A
631-735 Peconic 4/3/2013
631-736 Selden N/A
631-737 Ronkonkoma N/A
631-738 Ronkonkoma N/A
631-739 Ronkonkoma N/A
631-740 Riverhead N/A
631-741 Brentwood 10/9/2002
631-742 Huntington 10/9/2002
631-743 Port Jefferson 7/11/2013
631-744 Shoreham N/A
631-745 Riverhead 2/21/2002
631-746 Amityville 9/30/2014
631-747 Brentwood 3/10/2005
631-748 Brentwood N/A
631-749 Shelter Island N/A
631-750 Sayville N/A
631-751 Stony Brook N/A
631-752 Farmingdale N/A
631-753 Farmingdale N/A
631-754 Northport N/A
631-755 Farmingdale N/A
631-756 Farmingdale N/A
631-757 Northport N/A
631-758 Patchogue N/A
631-759 Huntington N/A
631-760 Huntington N/A
631-761 Central Islip N/A
631-762 Stony Brook N/A
631-763 Cold Spring Harbor N/A
631-764 Selden 4/12/2001
631-765 Southold N/A
631-766 Brentwood 7/6/2001
631-767 Brentwood 4/9/2002
631-768 Farmingdale N/A
631-769 Shoreham N/A
631-770 Farmingdale N/A
631-771 East Hampton 10/13/2004
631-772 Atlantic N/A
631-773 Farmingdale N/A
631-774 Brentwood N/A
631-775 Yaphank N/A
631-776 Bellport N/A
631-777 Farmingdale N/A
631-778 Central Islip N/A
631-779 Jamesport N/A
631-780 Smithtown N/A
631-781 Nassau Zone 09 N/A
631-782 Deer Park N/A
631-783 Nassau Zone 09 N/A
631-784 Central Islip N/A
631-785 Nassau Zone 09 N/A
631-786 Brentwood 1/16/2001
631-787 Central Islip N/A
631-788 Fishers Is N/A
631-789 Amityville N/A
631-790 Patchogue 5/16/2001
631-791 Port Jefferson N/A
631-792 Babylon N/A
631-793 Brentwood 3/15/2002
631-794 Farmingdale N/A
631-795 Nassau Zone 09 N/A
631-796 Brentwood 4/12/2001
631-797 Nassau Zone 09 N/A
631-798 Nassau Zone 09 N/A
631-799 Nassau Zone 09 N/A

NPANXX Area served1 Date2
631-800 Southampton N/A
631-801 Eastport N/A
631-802 Port Jefferson N/A
631-803 Bellport N/A
631-804 Brentwood 5/4/2001
631-805 Amityville 5/16/2001
631-806 Brentwood 10/5/2001
631-807 Brentwood 4/18/2002
631-808 Sag Harbor N/A
631-809 Deer Park 7/12/2018
631-810 Lindenhst 12/16/2020
631-812 Huntington 5/9/2001
631-813 Brentwood 10/15/2004
631-814 Babylon 10/10/2022
631-815 Farmingdale N/A
631-816 Yaphank 9/19/2002
631-817 Fire Island N/A
631-818 Babylon 10/30/2018
631-819 Bay Shore 9/16/2019
631-820 Ronkonkoma N/A
631-821 Shoreham N/A
631-822 Central Islip N/A
631-823 Bayport N/A
631-824 Huntington N/A
631-825 Montauk Point 8/1/2014
631-826 Nassau Zone 09 N/A
631-827 Huntington 5/16/2002
631-828 Port Jefferson N/A
631-829 Amityville 9/8/2015
631-830 Riverhead N/A
631-831 Brentwood N/A
631-832 Bayport N/A
631-833 Riverhead 9/6/2002
631-834 Brentwood N/A
631-835 Brentwood 6/4/2001
631-836 Brentwood 6/14/2001
631-837 Northport N/A
631-838 Brentwood N/A
631-839 Brentwood 1/16/2001
631-840 Islip N/A
631-841 Amityville N/A
631-842 Amityville N/A
631-843 Farmingdale N/A
631-844 Farmingdale N/A
631-845 Farmingdale N/A
631-846 Selden 1/16/2001
631-847 Farmingdale N/A
631-848 Brentwood 6/24/2002
631-849 Shoreham N/A
631-850 West Commack N/A
631-851 Central Islip N/A
631-852 Riverhead N/A
631-853 Central Islip N/A
631-854 Brentwood N/A
631-855 Deer Park N/A
631-856 Hampton Bays N/A
631-857 Cold Spring Harbor N/A
631-858 West Commack N/A
631-859 Islip N/A
631-860 Deer Park N/A
631-861 Farmingdale N/A
631-862 St James N/A
631-863 Smithtown N/A
631-864 Commack N/A
631-865 Deer Park N/A
631-866 Bellport N/A
631-867 Lindenhst N/A
631-868 Bayport N/A
631-869 Bellport N/A
631-870 Central Islip N/A
631-871 Riverhead 3/15/2002
631-872 Brentwood 6/27/2001
631-873 Brentwood 10/14/2004
631-874 Center Moriches N/A
631-875 Riverhead 7/18/2001
631-876 Southold 8/17/2004
631-877 Brentwood 8/2/2001
631-878 Center Moriches N/A
631-879 Patchogue N/A
631-880 Selden 11/8/2004
631-881 Central Islip N/A
631-882 Central Islip 5/16/2001
631-883 Bayport N/A
631-884 Lindenhst N/A
631-885 Brentwood 10/27/2004
631-886 Wading River N/A
631-887 Hampton Bays 10/10/2001
631-888 Lindenhst N/A
631-889 Deer Park 4/15/2002
631-890 Patchogue N/A
631-891 Patchogue 5/24/2004
631-892 Bay Shore N/A
631-893 Babylon N/A
631-894 Bay Shore N/A
631-895 Quogue 9/24/2020
631-896 Northport 6/17/2002
631-897 Huntington 10/3/2001
631-898 Westhampton N/A
631-899 Sag Harbor N/A

NPANXX Area served1 Date2
631-900 West Commack N/A
631-901 Brentwood 4/4/2005
631-902 Riverhead 10/9/2002
631-903 Southampton 10/9/2002
631-904 Central Islip N/A
631-905 Riverhead N/A
631-906 Deer Park 9/13/2019
631-907 East Hampton N/A
631-908 Patchogue 3/9/2020
631-909 Center Moriches N/A
631-910 Wading River N/A
631-912 Northport N/A
631-913 Ronkonkoma N/A
631-915 Riverhead N/A
631-916 Shoreham 2/2/2021
631-918 Deer Park N/A
631-919 Sag Harbor N/A
631-920 Midland N/A
631-921 Brentwood 10/5/2001
631-922 Brentwood N/A
631-923 Huntington N/A
631-924 Yaphank N/A
631-925 Northport N/A
631-926 Brentwood 9/25/2002
631-927 Farmingdale N/A
631-928 Port Jefferson N/A
631-929 Wading River N/A
631-930 Central Islip N/A
631-931 East Hampton 6/3/2016
631-932 Deer Park 4/1/2005
631-933 Amityville 1/23/2015
631-935 Huntington N/A
631-937 Southold 7/16/2015
631-938 Port Jefferson 4/8/2005
631-939 Riverhead 4/24/2019
631-940 Deer Park N/A
631-941 Stony Brook N/A
631-942 Brentwood 8/22/2005
631-943 Babylon 5/16/2001
631-944 Huntington N/A
631-945 Greenport 1/27/2021
631-946 Selden 9/7/2005
631-947 Bellport N/A
631-948 Brentwood N/A
631-949 Bellport 5/16/2001
631-951 Brentwood N/A
631-952 Brentwood N/A
631-953 Riverhead N/A
631-954 Bay Shore N/A
631-955 Deer Park N/A
631-956 Lindenhst N/A
631-957 Lindenhst N/A
631-960 Islip N/A
631-961 Babylon N/A
631-962 Farmingdale N/A
631-963 Central Islip N/A
631-964 Deer Park N/A
631-965 Riverhead 9/19/2002
631-966 Brentwood 7/8/2020
631-967 Brentwood N/A
631-968 Bay Shore N/A
631-969 Bay Shore N/A
631-970 Mattituck 1/27/2021
631-971 West Commack N/A
631-972 Brentwood 9/15/2005
631-973 Kings Park N/A
631-974 Smithtown 4/4/2001
631-975 Center Moriches 2/15/2016
631-977 Patchogue 2/9/2016
631-978 Port Jefferson N/A
631-979 Smithtown N/A
631-980 Commack N/A
631-981 Ronkonkoma N/A
631-982 Smithtown N/A
631-983 Babylon N/A
631-984 Deer Park 3/26/2020
631-985 Riverhead 1/27/2021
631-986 Smithtown 1/27/2021
631-987 Brentwood N/A
631-988 Huntington 2/14/2001
631-989 Riverhead N/A
631-990 Bay Shore 9/30/2019
631-991 Lindenhst N/A
631-992 Deer Park 9/16/2013
631-993 Commack N/A
631-994 Brentwood 8/25/2014
631-995 Yaphank N/A
631-996 Quogue N/A
631-997 Selden 7/29/2014
631-998 Westhampton N/A
  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 central office codes assigned before 2001.
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Cities in area code 631

City1 County Time2
Amagansett Suffolk E
Amityville Suffolk E
Aquebogue Suffolk E
Babylon Suffolk E
Bay Shore Suffolk E
Bayport Suffolk E
Bellport Suffolk E
Blue Point Suffolk E
Bohemia Suffolk E
Brentwood Suffolk E
Bridgehampton Suffolk E
Brightwaters Suffolk E
Brookhaven Suffolk E
Calverton Suffolk E
Center Moriches Suffolk E
Centereach Suffolk E
Centerport Suffolk E
Central Islip Suffolk E
Cold Spring Harbor Suffolk E
Commack Suffolk E
Copiague Suffolk E
Coram Suffolk E
Cutchogue Suffolk E
Deer Park Suffolk E
East Hampton Suffolk E
East Islip Suffolk E
East Marion Suffolk E
East Moriches Suffolk E
East Northport Suffolk E
East Quogue Suffolk E
East Setauket Suffolk E
Eastport Suffolk E
Farmingville Suffolk E
Fishers Island Suffolk E
Great River Suffolk E
Greenlawn Suffolk E
Greenport Suffolk E
Hampton Bays Suffolk E
Hauppauge Suffolk E
Holbrook Suffolk E
Holtsville Suffolk E
Huntington Suffolk E
Huntington Station Suffolk E
Islandia Suffolk E
Islip Suffolk E
Islip Terrace Suffolk E
Jamesport Suffolk E
Kings Park Suffolk E
Lake Grove Suffolk E
Laurel Suffolk E
Lindenhurst Suffolk E
Manorville Suffolk E
Mastic Suffolk E
Mastic Beach Suffolk E
Mattituck Suffolk E
Medford Suffolk E
Melville Suffolk E
Middle Island Suffolk E
Miller Place Suffolk E
Montauk Suffolk E
Moriches Suffolk E
Mount Sinai Suffolk E
Nesconset Suffolk E
New Suffolk Suffolk E
North Babylon Suffolk E
Northport Suffolk E
Oakdale Suffolk E
Ocean Beach Suffolk E
Orient Suffolk E
Patchogue Suffolk E
Peconic Suffolk E
Port Jefferson Suffolk E
Port Jefferson Station Suffolk E
Quogue Suffolk E
Remsenburg Suffolk E
Ridge Suffolk E
Riverhead Suffolk E
Rocky Point Suffolk E
Ronkonkoma Suffolk E
Sag Harbor Suffolk E
Sagaponack Suffolk E
Sayville Suffolk E
Selden Suffolk E
Shelter Island Suffolk E
Shelter Island Heights Suffolk E
Shirley Suffolk E
Shoreham Suffolk E
Smithtown Suffolk E
Sound Beach Suffolk E
South Jamesport Suffolk E
Southampton Suffolk E
Southold Suffolk E
Speonk Suffolk E
St James Suffolk E
Stony Brook Suffolk E
Upton Suffolk E
Wading River Suffolk E
Wainscott Suffolk E
Water Mill Suffolk E
West Babylon Suffolk E
West Islip Suffolk E
West Sayville Suffolk E
Westhampton Suffolk E
Westhampton Beach Suffolk E
Wyandanch Suffolk E
Yaphank Suffolk E
  1. Listed above are most places served by USA area code 631. When multiple places in a US state 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 ).
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