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 |
|---|---|---|---|---|---|---|---|
| 2021-03-01 | 631-802-0XXX | 0000–0999 | Assigned | UCOMTEL INC. | 534J | PTJEFFERSN | NY |
| 2021-03-01 | 631-960-4XXX | 4000–4999 | Assigned | UCOMTEL INC. | 534J | ISLIP | NY |
| 2021-03-01 | 631-970-1XXX | 1000–1999 | Assigned | UCOMTEL INC. | 534J | MATTITUCK | NY |
| 2021-02-11 | 631-600-6XXX | 6000–6999 | Assigned | UCOMTEL INC. | 534J | W COMMACK | NY |
| 2021-02-11 | 631-607-1XXX | 1000–1999 | Assigned | UCOMTEL INC. | 534J | WADING RIV | NY |
| 2021-02-11 | 631-641-1XXX | 1000–1999 | Assigned | UCOMTEL INC. | 534J | WATER MILL | NY |
| 2021-02-09 | 631-292-5XXX | 5000–5999 | Assigned | UCOMTEL INC. | 534J | KINGS PARK | NY |
| 2021-02-09 | 631-458-8XXX | 8000–8999 | Assigned | UCOMTEL INC. | 534J | SAG HARBOR | NY |
| 2021-02-09 | 631-571-0XXX | 0000–0999 | Assigned | UCOMTEL INC. | 534J | ORIENT | NY |
| 2021-02-09 | 631-646-0XXX | 0000–0999 | Assigned | UCOMTEL INC. | 534J | SAYVILLE | NY |
| 2021-02-09 | 631-734-1XXX | 1000–1999 | Assigned | UCOMTEL INC. | 534J | PECONIC | NY |
| 2021-02-09 | 631-810-0XXX | 0000–0999 | Assigned | UCOMTEL INC. | 534J | LINDENHST | NY |
| 2021-02-09 | 631-837-1XXX | 1000–1999 | Assigned | UCOMTEL INC. | 534J | NORTHPORT | NY |
| 2021-02-09 | 631-876-4XXX | 4000–4999 | Assigned | UCOMTEL INC. | 534J | SOUTHOLD | NY |
| 2021-02-09 | 631-895-0XXX | 0000–0999 | Assigned | UCOMTEL INC. | 534J | QUOGUE | NY |
| 2021-02-09 | 631-908-2XXX | 2000–2999 | Assigned | UCOMTEL INC. | 534J | PATCHOGUE | NY |
| 2021-02-09 | 631-916-1XXX | 1000–1999 | Assigned | UCOMTEL INC. | 534J | SHOREHAM | NY |
| 2021-02-09 | 631-985-1XXX | 1000–1999 | Assigned | UCOMTEL INC. | 534J | RIVERHEAD | NY |
| 2021-02-09 | 631-986-1XXX | 1000–1999 | Assigned | UCOMTEL INC. | 534J | SMITHTOWN | NY |
| 2021-02-08 | 631-301-9XXX | 9000–9999 | Assigned | UCOMTEL INC. | 534J | FARMINGDL | NY |
| 2021-02-08 | 631-365-8XXX | 8000–8999 | Assigned | UCOMTEL INC. | 534J | BRENTWOOD | NY |
| 2021-02-08 | 631-443-8XXX | 8000–8999 | Assigned | UCOMTEL INC. | 534J | EASTPORT | NY |
| 2021-02-08 | 631-634-1XXX | 1000–1999 | Assigned | UCOMTEL INC. | 534J | COMMACK | NY |
| 2021-02-08 | 631-705-1XXX | 1000–1999 | Assigned | UCOMTEL INC. | 534J | ATLANTIC | NY |
| 2021-02-08 | 631-763-9XXX | 9000–9999 | Assigned | UCOMTEL INC. | 534J | COLDSPGHBR | NY |
| 2021-02-08 | 631-818-0XXX | 0000–0999 | Assigned | UCOMTEL INC. | 534J | BABYLON | NY |
| 2021-02-08 | 631-866-9XXX | 9000–9999 | Assigned | UCOMTEL INC. | 534J | BELLPORT | NY |
| 2021-02-08 | 631-881-3XXX | 3000–3999 | Assigned | UCOMTEL INC. | 534J | CENTRAISLP | NY |
| 2021-02-08 | 631-906-4XXX | 4000–4999 | Assigned | UCOMTEL INC. | 534J | DEER PARK | NY |
| 2021-02-08 | 631-931-9XXX | 9000–9999 | Assigned | UCOMTEL INC. | 534J | E HAMPTON | NY |
| 2021-02-08 | 631-945-1XXX | 1000–1999 | Assigned | UCOMTEL INC. | 534J | GREENPORT | NY |
| 2021-02-08 | 631-975-6XXX | 6000–6999 | Assigned | UCOMTEL INC. | 534J | CTRMORICHS | NY |
| 2021-02-08 | 631-990-0XXX | 0000–0999 | Assigned | UCOMTEL INC. | 534J | BAY SHORE | 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.