NumberResearchThousands-blocks in 531-519
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 531-519 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 531 blocks
Most active assignees, all time — NPA 531
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 |
|---|---|---|---|---|---|---|---|
| 2021-06-25 | 531-519-0XXX | 0000–0999 | Assigned | UNITED STATES CELLULAR - NE | 6263 | WAYNE | NE |
| 2019-08-20 | 531-519-1XXX | 1000–1999 | Assigned | ONVOY, LLC - NE | 549E | WAYNE | NE |
| — | 531-519-2XXX | 2000–2999 | Available | WAYNE | NE | ||
| 2018-07-10 | 531-519-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WAYNE | NE |
| 2021-02-11 | 531-519-4XXX | 4000–4999 | Assigned | ONVOY, LLC - NE | 549E | WAYNE | NE |
| 2018-05-04 | 531-519-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE | 5807 | WAYNE | NE |
| 2020-12-14 | 531-519-6XXX | 6000–6999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | WAYNE | NE |
| 2021-02-11 | 531-519-7XXX | 7000–7999 | Assigned | ONVOY, LLC - NE | 549E | WAYNE | NE |
| 2018-01-15 | 531-519-8XXX | 8000–8999 | Assigned | N.E. COLORADO CELLULAR, INC. | 6874 | WAYNE | NE |
| 2021-03-24 | 531-519-9XXX | 9000–9999 | Assigned | ONVOY, LLC - NE | 549E | WAYNE | NE |
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.