NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-08-27 | 631-228-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | SHOREHAM | NY |
| 2024-08-27 | 631-341-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | YAPHANK | NY |
| 2024-08-27 | 631-516-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | SELDEN | NY |
| 2024-08-27 | 631-590-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | RONKONKOMA | NY |
| 2024-08-27 | 631-638-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | STONYBROOK | NY |
| 2024-08-27 | 631-925-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | NORTHPORT | NY |
| 2024-08-23 | 631-956-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | LINDENHST | NY |
| 2024-08-22 | 631-430-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | GREENPORT | NY |
| 2024-08-22 | 631-443-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | EASTPORT | NY |
| 2024-08-22 | 631-594-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | HAMPTNBAYS | NY |
| 2024-08-22 | 631-779-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | JAMESPORT | NY |
| 2024-08-22 | 631-906-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | DEER PARK | NY |
| 2024-08-22 | 631-931-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | E HAMPTON | NY |
| 2024-08-22 | 631-993-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | COMMACK | NY |
| 2024-08-21 | 631-426-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | AMITYVILLE | NY |
| 2024-08-21 | 631-557-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | AMAGANSETT | NY |
| 2024-08-21 | 631-972-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BRENTWOOD | NY |
| 2021-09-23 | 631-701-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | EASTPORT | NY |
| 2021-09-23 | 631-945-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | GREENPORT | NY |
| 2021-09-10 | 631-634-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | COMMACK | NY |
| 2021-09-10 | 631-717-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | BAYPORT | NY |
| 2021-09-10 | 631-990-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | BAY SHORE | NY |
| 2020-05-06 | 631-209-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | SHOREHAM | NY |
| 2020-05-06 | 631-257-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | SMITHTOWN | NY |
| 2020-05-06 | 631-301-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | FARMINGDL | NY |
| 2020-05-06 | 631-313-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | ISLIP | NY |
| 2020-05-06 | 631-479-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | HUNTINGTON | NY |
| 2020-05-06 | 631-628-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NORTHPORT | NY |
| 2020-05-06 | 631-908-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | PATCHOGUE | NY |
| 2020-05-06 | 631-939-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | RIVERHEAD | NY |
| 2020-05-06 | 631-984-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | DEER PARK | NY |
| 2019-04-17 | 631-313-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ISLIP | NY |
| 2017-06-16 | 631-209-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | SHOREHAM | NY |
| 2017-06-16 | 631-310-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | PATCHOGUE | NY |
| 2017-06-15 | 631-301-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | FARMINGDL | NY |
| 2017-06-15 | 631-479-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HUNTINGTON | NY |
| 2017-06-15 | 631-481-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | ISLIP | NY |
| 2017-06-15 | 631-860-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | DEER PARK | NY |
| 2016-11-23 | 631-210-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | ISLIP | NY |
| 2016-11-23 | 631-284-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | RIVERHEAD | NY |
| 2015-02-25 | 631-228-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | SHOREHAM | NY |
| 2015-02-25 | 631-239-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | NORTHPORT | NY |
| 2015-02-25 | 631-337-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | SAYVILLE | NY |
| 2015-02-25 | 631-518-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | BAY SHORE | NY |
| 2015-02-25 | 631-568-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | AMITYVILLE | NY |
| 2015-02-25 | 631-644-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | RIVERHEAD | NY |
| 2015-02-25 | 631-674-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | MIDLAND | NY |
| 2015-02-25 | 631-784-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | CENTRAISLP | NY |
| 2015-02-25 | 631-840-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | ISLIP | NY |
| 2014-06-11 | 631-557-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | AMAGANSETT | NY |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.