All assignees
799 prefixes in 631 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 631-900 | W COMMACK | 384C | — | Yes |
| 631-901 | BRENTWOOD | 6622 | 2005-04-04 | Yes |
| 631-902 | RIVERHEAD | 4036 | 2002-10-09 | Yes |
| 631-903 | SOUTHAMPTN | 4036 | 2002-10-09 | Yes |
| 631-904 | CENTRAISLP | 9104 | — | Yes |
| 631-905 | RIVERHEAD | 9104 | — | Yes |
| 631-906 | DEER PARK | 6622 | 2019-09-13 | Yes |
| 631-907 | E HAMPTON | 9104 | — | Yes |
| 631-908 | PATCHOGUE | 612K | 2020-03-09 | Yes |
| 631-909 | CTRMORICHS | 7126 | — | Yes |
| 631-910 | WADING RIV | 8340 | — | Yes |
| 631-911 | XXXXXXXXXX | MULT | — | — |
| 631-912 | NORTHPORT | 9104 | — | Yes |
| 631-913 | RONKONKOMA | 7133 | — | Yes |
| 631-914 | RIVERHEAD | 4036 | 2024-11-25 | Yes |
| 631-915 | RIVERHEAD | 8667 | — | — |
| 631-916 | SHOREHAM | 073H | 2021-02-02 | Yes |
| 631-918 | DEER PARK | 7140 | — | Yes |
| 631-919 | SAG HARBOR | 384C | — | Yes |
| 631-920 | MIDLAND | 7126 | — | Yes |
| 631-921 | BRENTWOOD | 6959 | 2001-10-05 | — |
| 631-922 | BRENTWOOD | 6622 | — | Yes |
| 631-923 | HUNTINGTON | 7421 | — | Yes |
| 631-924 | YAPHANK | 9104 | — | — |
| 631-925 | NORTHPORT | 4006 | — | Yes |
| 631-926 | BRENTWOOD | 5562 | 2002-09-25 | Yes |
| 631-927 | FARMINGDL | 7421 | — | Yes |
| 631-928 | PTJEFFERSN | 9104 | — | — |
| 631-929 | WADING RIV | 9104 | — | Yes |
| 631-930 | CENTRAISLP | 829J | — | Yes |
| 631-931 | E HAMPTON | 705G | 2016-06-03 | Yes |
| 631-932 | DEER PARK | 9104 | 2005-04-01 | Yes |
| 631-933 | AMITYVILLE | 6622 | 2015-01-23 | Yes |
| 631-934 | BABYLON | 5562 | 2025-03-27 | Yes |
| 631-935 | HUNTINGTON | 4036 | — | Yes |
| 631-936 | XXXXXXXXXX | 9104 | — | — |
| 631-937 | SOUTHOLD | 612K | 2015-07-16 | Yes |
| 631-938 | PTJEFFERSN | 4006 | 2005-04-08 | Yes |
| 631-939 | RIVERHEAD | 5562 | 2019-04-24 | Yes |
| 631-940 | DEER PARK | 7126 | — | Yes |
| 631-941 | STONYBROOK | 9104 | — | Yes |
| 631-942 | BRENTWOOD | 6959 | 2005-08-22 | Yes |
| 631-943 | BABYLON | 6622 | 2001-05-16 | — |
| 631-944 | HUNTINGTON | 829J | — | Yes |
| 631-945 | GREENPORT | 384C | 2021-01-27 | Yes |
| 631-946 | SELDEN | 4036 | 2005-09-07 | Yes |
| 631-947 | BELLPORT | 7133 | — | Yes |
| 631-948 | BRENTWOOD | 6622 | — | — |
| 631-949 | BELLPORT | 6622 | 2001-05-16 | — |
| 631-950 | — | — | ||
| 631-951 | BRENTWOOD | 9104 | — | Yes |
| 631-952 | BRENTWOOD | 9104 | — | — |
| 631-953 | RIVERHEAD | 9104 | — | Yes |
| 631-954 | BAY SHORE | 997E | — | Yes |
| 631-955 | DEER PARK | 9104 | — | — |
| 631-956 | LINDENHST | 9104 | — | Yes |
| 631-957 | LINDENHST | 9104 | — | — |
| 631-958 | — | — | ||
| 631-959 | — | — | ||
| 631-960 | ISLIP | 7140 | — | Yes |
| 631-961 | BABYLON | 4006 | — | Yes |
| 631-962 | FARMINGDL | 7133 | — | Yes |
| 631-963 | CENTRAISLP | 7133 | — | Yes |
| 631-964 | DEER PARK | 7133 | — | Yes |
| 631-965 | RIVERHEAD | 4036 | 2002-09-19 | Yes |
| 631-966 | BRENTWOOD | 965H | 2020-07-08 | Yes |
| 631-967 | BRENTWOOD | 829J | — | — |
| 631-968 | BAY SHORE | 9104 | — | — |
| 631-969 | BAY SHORE | 9104 | — | Yes |
| 631-970 | MATTITUCK | 384C | 2021-01-27 | Yes |
| 631-971 | W COMMACK | 829J | — | Yes |
| 631-972 | BRENTWOOD | 4006 | 2005-09-15 | Yes |
| 631-973 | KINGS PARK | 7140 | — | Yes |
| 631-974 | SMITHTOWN | 6622 | 2001-04-04 | — |
| 631-975 | CTRMORICHS | 384C | 2016-02-15 | Yes |
| 631-976 | XXXXXXXXXX | MULT | — | — |
| 631-977 | PATCHOGUE | 384C | 2016-02-09 | Yes |
| 631-978 | PTJEFFERSN | 7133 | — | Yes |
| 631-979 | SMITHTOWN | 9104 | — | — |
| 631-980 | COMMACK | 384C | — | — |
| 631-981 | RONKONKOMA | 9104 | — | — |
| 631-982 | SMITHTOWN | 7133 | — | Yes |
| 631-983 | BABYLON | 7133 | — | Yes |
| 631-984 | DEER PARK | 425J | 2020-03-26 | Yes |
| 631-985 | RIVERHEAD | 384C | 2021-01-27 | Yes |
| 631-986 | SMITHTOWN | 384C | 2021-01-27 | Yes |
| 631-987 | BRENTWOOD | 6959 | — | — |
| 631-988 | HUNTINGTON | 4036 | 2001-02-14 | — |
| 631-989 | RIVERHEAD | 624H | — | Yes |
| 631-990 | BAY SHORE | 363H | 2019-09-30 | Yes |
| 631-991 | LINDENHST | 7140 | — | Yes |
| 631-992 | DEER PARK | 7126 | 2013-09-16 | Yes |
| 631-993 | COMMACK | 7133 | — | Yes |
| 631-994 | BRENTWOOD | 4036 | 2014-08-25 | Yes |
| 631-995 | YAPHANK | 7133 | — | Yes |
| 631-996 | QUOGUE | 7126 | — | Yes |
| 631-997 | SELDEN | 4036 | 2014-07-29 | Yes |
| 631-998 | WESTHAMPTN | 7126 | — | Yes |
| 631-999 | JAMESPORT | 977K | 2024-02-20 | 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.