NumberResearchRecent thousands-block assignments
3 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, last 30 days — NPA 631
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-08-16 | 631-257-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | SMITHTOWN | NY |
| 2013-08-15 | 631-450-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | LINDENHST | NY |
| 2013-08-12 | 631-307-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | PATCHOGUE | NY |
| 2013-08-09 | 631-268-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | SOUTHAMPTN | NY |
| 2013-08-08 | 631-268-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | SOUTHAMPTN | NY |
| 2013-08-06 | 631-307-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | PATCHOGUE | NY |
| 2013-08-06 | 631-364-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | STONYBROOK | NY |
| 2013-08-06 | 631-432-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | BRENTWOOD | NY |
| 2013-08-06 | 631-538-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SELDEN | NY |
| 2013-08-06 | 631-573-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | SAYVILLE | NY |
| 2013-07-30 | 631-257-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | SMITHTOWN | NY |
| 2013-07-30 | 631-450-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | LINDENHST | NY |
| 2013-07-30 | 631-490-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | ATLANTIC | NY |
| 2013-07-30 | 631-526-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | BABYLON | NY |
| 2013-07-30 | 631-542-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | RONKONKOMA | NY |
| 2013-07-30 | 631-938-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | PTJEFFERSN | NY |
| 2013-07-30 | 631-964-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | DEER PARK | 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 |
| 2013-07-09 | 631-402-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | BRENTWOOD | NY |
| 2013-07-09 | 631-402-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | BRENTWOOD | NY |
| 2013-07-09 | 631-448-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | YAPHANK | NY |
| 2013-07-08 | 631-923-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HUNTINGTON | NY |
| 2013-07-01 | 631-296-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | BRIDGEMPTN | NY |
| 2013-06-28 | 631-507-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | AMITYVILLE | NY |
| 2013-06-28 | 631-507-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | AMITYVILLE | NY |
| 2013-06-28 | 631-600-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | W COMMACK | NY |
| 2013-06-26 | 631-449-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | BRENTWOOD | NY |
| 2013-06-26 | 631-918-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DEER PARK | NY |
| 2013-06-26 | 631-944-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | HUNTINGTON | NY |
| 2013-06-25 | 631-407-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | SOUTHOLD | NY |
| 2013-06-25 | 631-480-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | AMITYVILLE | NY |
| 2013-06-25 | 631-480-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | AMITYVILLE | NY |
| 2013-06-25 | 631-500-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | WATER MILL | NY |
| 2013-06-25 | 631-520-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | AMITYVILLE | NY |
| 2013-06-25 | 631-520-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | AMITYVILLE | 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 |
| 2013-06-18 | 631-449-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | BRENTWOOD | NY |
| 2013-06-12 | 631-918-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | DEER PARK | NY |
| 2013-06-12 | 631-918-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | DEER PARK | NY |
| 2013-05-29 | 631-402-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | BRENTWOOD | NY |
| 2013-05-29 | 631-402-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | BRENTWOOD | NY |
| 2013-05-29 | 631-461-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | RIVERHEAD | NY |
| 2013-05-29 | 631-601-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | BRENTWOOD | NY |
| 2013-05-29 | 631-601-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | BRENTWOOD | NY |
| 2013-05-29 | 631-601-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | BRENTWOOD | NY |
| 2013-05-29 | 631-601-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | BRENTWOOD | NY |
| 2013-05-29 | 631-601-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | BRENTWOOD | NY |
| 2013-05-29 | 631-620-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | BABYLON | 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.