All assignees
799 prefixes in 631 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 631-700 | — | — | ||
| 631-701 | EASTPORT | 7140 | — | Yes |
| 631-702 | SOUTHAMPTN | 4006 | — | Yes |
| 631-703 | AMITYVILLE | 6622 | 2005-08-08 | Yes |
| 631-704 | BRENTWOOD | 4036 | 2005-08-16 | Yes |
| 631-705 | ATLANTIC | 384C | 2016-02-16 | Yes |
| 631-706 | STONYBROOK | 7133 | — | Yes |
| 631-707 | BRENTWOOD | 4006 | 2005-03-10 | Yes |
| 631-708 | BRENTWOOD | 6959 | — | Yes |
| 631-709 | WATER MILL | 4006 | 2004-08-17 | Yes |
| 631-710 | RONKONKOMA | 7126 | 2018-06-06 | Yes |
| 631-711 | XXXXXXXXXX | MULT | — | — |
| 631-712 | FARMINGDL | 7140 | — | Yes |
| 631-713 | EASTPORT | 829J | — | — |
| 631-714 | PATCHOGUE | 4006 | 2004-10-11 | Yes |
| 631-715 | CENTRAISLP | 7140 | — | Yes |
| 631-716 | SELDEN | 9104 | — | Yes |
| 631-717 | BAYPORT | 818H | 2021-04-29 | Yes |
| 631-718 | RONKONKOMA | 5562 | 2025-03-27 | Yes |
| 631-719 | FARMINGDL | 7126 | — | — |
| 631-720 | BRENTWOOD | 6622 | 2020-05-14 | Yes |
| 631-721 | SELDEN | 7133 | — | Yes |
| 631-722 | JAMESPORT | 9104 | — | Yes |
| 631-723 | HAMPTNBAYS | 9104 | — | Yes |
| 631-724 | SMITHTOWN | 9104 | — | — |
| 631-725 | SAG HARBOR | 9104 | — | — |
| 631-726 | WATER MILL | 9104 | — | Yes |
| 631-727 | RIVERHEAD | 9104 | — | — |
| 631-728 | HAMPTNBAYS | 9104 | — | — |
| 631-729 | ATLANTIC | 7140 | — | Yes |
| 631-730 | PATCHOGUE | 7126 | — | Yes |
| 631-731 | AMAGANSETT | 4006 | — | Yes |
| 631-732 | SELDEN | 9104 | — | — |
| 631-733 | BRENTWOOD | 2612 | — | — |
| 631-734 | PECONIC | 9104 | — | Yes |
| 631-735 | PECONIC | 155E | 2013-04-03 | Yes |
| 631-736 | SELDEN | 9104 | — | — |
| 631-737 | RONKONKOMA | 9104 | — | — |
| 631-738 | RONKONKOMA | 9104 | — | — |
| 631-739 | RONKONKOMA | 7133 | — | Yes |
| 631-740 | RIVERHEAD | 6959 | — | Yes |
| 631-741 | BRENTWOOD | 4036 | 2002-10-09 | Yes |
| 631-742 | HUNTINGTON | 4036 | 2002-10-09 | Yes |
| 631-743 | PTJEFFERSN | 612K | 2013-07-11 | Yes |
| 631-744 | SHOREHAM | 9104 | — | — |
| 631-745 | RIVERHEAD | 4036 | 2002-02-21 | — |
| 631-746 | AMITYVILLE | 6622 | 2014-09-30 | Yes |
| 631-747 | BRENTWOOD | 4036 | 2005-03-10 | Yes |
| 631-748 | BRENTWOOD | 6622 | — | — |
| 631-749 | SHELTER IS | 9104 | — | Yes |
| 631-750 | SAYVILLE | 7126 | — | Yes |
| 631-751 | STONYBROOK | 9104 | — | — |
| 631-752 | FARMINGDL | 9104 | — | Yes |
| 631-753 | FARMINGDL | 9104 | — | Yes |
| 631-754 | NORTHPORT | 9104 | — | — |
| 631-755 | FARMINGDL | 9104 | — | — |
| 631-756 | FARMINGDL | 9104 | — | Yes |
| 631-757 | NORTHPORT | 9104 | — | — |
| 631-758 | PATCHOGUE | 9104 | — | — |
| 631-759 | HUNTINGTON | 4006 | — | Yes |
| 631-760 | HUNTINGTON | 7140 | — | Yes |
| 631-761 | CENTRAISLP | 7126 | — | Yes |
| 631-762 | STONYBROOK | 4006 | — | Yes |
| 631-763 | COLDSPGHBR | 7133 | — | Yes |
| 631-764 | SELDEN | 5562 | 2001-04-12 | Yes |
| 631-765 | SOUTHOLD | 9104 | — | Yes |
| 631-766 | BRENTWOOD | 6959 | 2001-07-06 | — |
| 631-767 | BRENTWOOD | 5562 | 2002-04-09 | Yes |
| 631-768 | FARMINGDL | 829J | — | Yes |
| 631-769 | SHOREHAM | 7133 | — | Yes |
| 631-770 | FARMINGDL | 7133 | — | Yes |
| 631-771 | E HAMPTON | 4006 | 2004-10-13 | Yes |
| 631-772 | ATLANTIC | 7126 | — | Yes |
| 631-773 | FARMINGDL | 829J | — | Yes |
| 631-774 | BRENTWOOD | 5562 | — | Yes |
| 631-775 | YAPHANK | 7126 | — | Yes |
| 631-776 | BELLPORT | 9104 | — | Yes |
| 631-777 | FARMINGDL | 9104 | — | Yes |
| 631-778 | CENTRAISLP | 7133 | — | Yes |
| 631-779 | JAMESPORT | 612K | — | Yes |
| 631-780 | SMITHTOWN | 7133 | — | Yes |
| 631-781 | NASSAUZN09 | 9104 | — | Yes |
| 631-782 | DEER PARK | 829J | — | Yes |
| 631-783 | NASSAUZN09 | 9104 | — | Yes |
| 631-784 | CENTRAISLP | 7140 | — | Yes |
| 631-785 | NASSAUZN09 | 9104 | — | Yes |
| 631-786 | BRENTWOOD | 6959 | 2001-01-16 | — |
| 631-787 | CENTRAISLP | 7140 | — | Yes |
| 631-788 | FISHERS IS | 0095 | — | — |
| 631-789 | AMITYVILLE | 9104 | — | — |
| 631-790 | PATCHOGUE | 6622 | 2001-05-16 | — |
| 631-791 | PTJEFFERSN | 7133 | — | Yes |
| 631-792 | BABYLON | 7140 | — | Yes |
| 631-793 | BRENTWOOD | 6959 | 2002-03-15 | — |
| 631-794 | FARMINGDL | 829J | — | — |
| 631-795 | NASSAUZN09 | 9104 | — | Yes |
| 631-796 | BRENTWOOD | 5562 | 2001-04-12 | Yes |
| 631-797 | NASSAUZN09 | 9104 | — | Yes |
| 631-798 | NASSAUZN09 | 9104 | — | Yes |
| 631-799 | NASSAUZN09 | 9104 | — | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.