NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 631
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-03-09 | 631-908-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | PATCHOGUE | NY |
| 2018-12-18 | 631-900-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | W COMMACK | NY |
| 2018-10-03 | 631-944-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | HUNTINGTON | NY |
| 2018-07-17 | 631-557-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | AMAGANSETT | NY |
| 2018-07-17 | 631-886-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | WADING RIV | NY |
| 2018-06-13 | 631-314-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | BABYLON | NY |
| 2018-02-26 | 631-203-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | CENTRAISLP | NY |
| 2017-08-23 | 631-823-0XXX | 0000–0999 | Assigned | CSC VOICE, LLC | 612K | BAYPORT | NY |
| 2016-06-10 | 631-381-0XXX | 0000–0999 | Assigned | CSC VOICE, LLC | 612K | RIVERHEAD | NY |
| 2015-07-17 | 631-937-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | SOUTHOLD | NY |
| 2015-05-29 | 631-526-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | BABYLON | NY |
| 2015-05-22 | 631-214-1XXX | 1000–1999 | Assigned | CSC VOICE, LLC | 612K | DEER PARK | NY |
| 2014-08-08 | 631-815-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | FARMINGDL | NY |
| 2014-05-28 | 631-856-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | HAMPTNBAYS | NY |
| 2014-04-03 | 631-824-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | HUNTINGTON | NY |
| 2014-01-27 | 631-498-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | COLDSPGHBR | NY |
| 2013-08-29 | 631-285-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | RONKONKOMA | NY |
| 2013-08-16 | 631-257-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | SMITHTOWN | NY |
| 2013-08-12 | 631-307-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | PATCHOGUE | NY |
| 2013-08-06 | 631-364-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | STONYBROOK | NY |
| 2013-08-06 | 631-573-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | SAYVILLE | NY |
| 2013-07-12 | 631-743-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | PTJEFFERSN | NY |
| 2013-07-11 | 631-658-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | E HAMPTON | NY |
| 2013-07-01 | 631-296-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | BRIDGEMPTN | NY |
| 2013-06-25 | 631-407-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | SOUTHOLD | NY |
| 2013-06-25 | 631-500-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | WATER MILL | NY |
| 2013-06-25 | 631-919-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | SAG HARBOR | NY |
| 2013-06-20 | 631-735-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | PECONIC | NY |
| 2013-05-29 | 631-684-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | WESTHAMPTN | NY |
| 2013-05-13 | 631-204-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | SOUTHAMPTN | NY |
| 2013-04-10 | 631-250-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | ST JAMES | NY |
| 2013-04-05 | 631-448-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | YAPHANK | NY |
| 2013-03-18 | 631-740-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | RIVERHEAD | NY |
| 2013-03-06 | 631-496-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | SELDEN | NY |
| 2013-03-01 | 631-400-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | CTRMORICHS | NY |
| 2013-02-19 | 631-285-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | RONKONKOMA | NY |
| 2012-12-05 | 631-448-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | YAPHANK | NY |
| 2012-09-14 | 631-450-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | LINDENHST | NY |
| 2012-09-14 | 631-778-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | CENTRAISLP | NY |
| 2012-06-15 | 631-527-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | E HAMPTON | NY |
| 2012-06-15 | 631-749-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | SHELTER IS | NY |
| 2012-05-16 | 631-849-1XXX | 1000–1999 | Assigned | CSC VOICE, LLC | 612K | SHOREHAM | NY |
| 2011-10-07 | 631-573-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | SAYVILLE | NY |
| 2011-09-27 | 631-256-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | SAYVILLE | NY |
| 2011-09-27 | 631-438-0XXX | 0000–0999 | Assigned | CSC VOICE, LLC | 612K | PATCHOGUE | NY |
| 2011-09-27 | 631-464-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | AMITYVILLE | NY |
| 2011-09-27 | 631-509-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | PTJEFFERSN | NY |
| 2011-09-27 | 631-620-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | BABYLON | NY |
| 2011-09-27 | 631-683-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | HUNTINGTON | NY |
| 2011-09-20 | 631-346-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | SELDEN | NY |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.