NumberResearchThousands-blocks in 631-840
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 631-840 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 631 blocks
Most active assignees, all time — 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 |
|---|---|---|---|---|---|---|---|
| 2016-03-11 | 631-840-0XXX | 0000–0999 | Assigned | ONVOY, LLC- NY | 384C | ISLIP | NY |
| — | 631-840-1XXX | 1000–1999 | Reserved | ONVOY, LLC- NY | 384C | ISLIP | NY |
| 2015-02-25 | 631-840-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | ISLIP | NY |
| — | 631-840-3XXX | 3000–3999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | ISLIP | NY |
| 2014-04-03 | 631-840-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ISLIP | NY |
| — | 631-840-5XXX | 5000–5999 | Reserved | CABLEVISION LIGHTPATH, INC. - NY | 7126 | ISLIP | NY |
| 2016-03-11 | 631-840-6XXX | 6000–6999 | Assigned | ONVOY, LLC- NY | 384C | ISLIP | NY |
| 2005-04-28 | 631-840-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | ISLIP | NY |
| 2012-03-12 | 631-840-8XXX | 8000–8999 | Assigned | ONVOY, LLC- NY | 384C | ISLIP | NY |
| 2017-05-04 | 631-840-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | ISLIP | 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.