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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 631-648-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | RONKONKOMA | NY |
| — | 631-651-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | NORTHPORT | NY |
| — | 631-651-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | NORTHPORT | NY |
| — | 631-656-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | SMITHTOWN | NY |
| — | 631-656-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | SMITHTOWN | NY |
| — | 631-656-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | SMITHTOWN | NY |
| — | 631-659-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | COLDSPGHBR | NY |
| — | 631-663-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | KINGS PARK | NY |
| — | 631-663-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | KINGS PARK | NY |
| — | 631-670-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | COMMACK | NY |
| — | 631-670-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | COMMACK | NY |
| — | 631-686-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | ST JAMES | NY |
| — | 631-686-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | ST JAMES | NY |
| — | 631-730-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | PATCHOGUE | NY |
| — | 631-730-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | PATCHOGUE | NY |
| — | 631-730-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | PATCHOGUE | NY |
| — | 631-730-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | PATCHOGUE | NY |
| — | 631-750-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | SAYVILLE | NY |
| — | 631-750-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | SAYVILLE | NY |
| — | 631-750-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | SAYVILLE | NY |
| — | 631-772-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | ATLANTIC | NY |
| — | 631-772-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | ATLANTIC | NY |
| — | 631-772-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | ATLANTIC | NY |
| — | 631-772-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | ATLANTIC | NY |
| — | 631-772-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | ATLANTIC | NY |
| — | 631-772-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | ATLANTIC | NY |
| — | 631-779-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | JAMESPORT | NY |
| — | 631-779-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | JAMESPORT | NY |
| — | 631-801-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | EASTPORT | NY |
| — | 631-801-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | EASTPORT | NY |
| — | 631-803-0XXX | 0000–0999 | Assigned | CSC VOICE, LLC | 612K | BELLPORT | NY |
| — | 631-803-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | BELLPORT | NY |
| — | 631-803-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | BELLPORT | NY |
| — | 631-803-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | BELLPORT | NY |
| — | 631-828-1XXX | 1000–1999 | Assigned | CSC VOICE, LLC | 612K | PTJEFFERSN | NY |
| — | 631-828-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | PTJEFFERSN | NY |
| — | 631-828-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | PTJEFFERSN | NY |
| — | 631-828-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | PTJEFFERSN | NY |
| — | 631-828-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | PTJEFFERSN | NY |
| — | 631-828-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | PTJEFFERSN | NY |
| — | 631-846-1XXX | 1000–1999 | Assigned | CSC VOICE, LLC | 612K | SELDEN | NY |
| — | 631-846-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | SELDEN | NY |
| — | 631-846-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | SELDEN | NY |
| — | 631-846-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | SELDEN | NY |
| — | 631-846-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | SELDEN | NY |
| — | 631-846-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | SELDEN | NY |
| — | 631-849-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | SHOREHAM | NY |
| — | 631-849-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | SHOREHAM | NY |
| — | 631-849-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | SHOREHAM | NY |
| — | 631-849-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | SHOREHAM | 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.