NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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 |
|---|---|---|---|---|---|---|---|
| 2016-07-29 | 631-202-2XXX | 2000–2999 | Assigned | HD CARRIER LLC | 321J | RONKONKOMA | NY |
| 2016-07-29 | 631-202-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | RONKONKOMA | NY |
| 2016-07-29 | 631-202-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | RONKONKOMA | NY |
| 2016-07-29 | 631-202-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | RONKONKOMA | NY |
| 2016-07-29 | 631-202-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | RONKONKOMA | NY |
| 2016-07-29 | 631-290-2XXX | 2000–2999 | Assigned | HD CARRIER LLC | 321J | BABYLON | NY |
| 2016-07-29 | 631-290-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | BABYLON | NY |
| 2016-07-29 | 631-290-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | BABYLON | NY |
| 2016-07-29 | 631-290-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | BABYLON | NY |
| 2016-07-29 | 631-526-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | BABYLON | NY |
| 2016-07-29 | 631-659-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | COLDSPGHBR | NY |
| 2016-07-29 | 631-659-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | COLDSPGHBR | NY |
| 2016-07-29 | 631-659-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | COLDSPGHBR | NY |
| 2016-07-29 | 631-763-0XXX | 0000–0999 | Assigned | HD CARRIER LLC | 321J | COLDSPGHBR | NY |
| 2016-06-03 | 631-931-1XXX | 1000–1999 | Assigned | HD CARRIER LLC | 321J | E HAMPTON | NY |
| 2014-07-08 | 631-250-0XXX | 0000–0999 | Assigned | HD CARRIER LLC | 321J | ST JAMES | NY |
| 2014-07-08 | 631-307-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | PATCHOGUE | NY |
| 2014-07-08 | 631-315-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | MATTITUCK | NY |
| 2014-07-08 | 631-326-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | COMMACK | NY |
| 2014-07-08 | 631-341-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | YAPHANK | NY |
| 2014-07-08 | 631-350-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | HUNTINGTON | NY |
| 2014-07-08 | 631-364-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | STONYBROOK | NY |
| 2014-07-08 | 631-483-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | MONTAUK PT | NY |
| 2014-07-08 | 631-500-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | WATER MILL | NY |
| 2014-07-08 | 631-518-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | BAY SHORE | NY |
| 2014-07-08 | 631-538-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | SELDEN | NY |
| 2014-07-08 | 631-542-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | RONKONKOMA | NY |
| 2014-07-08 | 631-573-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | SAYVILLE | NY |
| 2014-07-08 | 631-599-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | RIVERHEAD | NY |
| 2014-07-08 | 631-620-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | BABYLON | NY |
| 2014-07-08 | 631-633-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | BELLPORT | NY |
| 2014-07-08 | 631-637-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | BRENTWOOD | NY |
| 2014-07-08 | 631-652-2XXX | 2000–2999 | Assigned | HD CARRIER LLC | 321J | SMITHTOWN | NY |
| 2014-07-08 | 631-674-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | MIDLAND | NY |
| 2014-07-08 | 631-743-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | PTJEFFERSN | NY |
| 2014-07-08 | 631-800-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | SOUTHAMPTN | NY |
| 2014-07-08 | 631-832-2XXX | 2000–2999 | Assigned | HD CARRIER LLC | 321J | BAYPORT | NY |
| 2014-07-08 | 631-837-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | NORTHPORT | NY |
| 2014-07-08 | 631-856-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | HAMPTNBAYS | NY |
| 2014-07-08 | 631-857-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | COLDSPGHBR | NY |
| 2014-07-08 | 631-858-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | W COMMACK | NY |
| 2014-07-08 | 631-881-1XXX | 1000–1999 | Assigned | HD CARRIER LLC | 321J | CENTRAISLP | NY |
| 2014-07-08 | 631-888-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | LINDENHST | NY |
| 2014-07-08 | 631-960-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | ISLIP | NY |
| 2014-07-08 | 631-973-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | KINGS PARK | NY |
| 2014-07-08 | 631-992-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | DEER PARK | NY |
| 2014-07-07 | 631-568-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | AMITYVILLE | NY |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.