NumberResearchThousands-blocks in 501-510
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 501-510 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 501 blocks
Most active assignees, all time — NPA 501
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-05-28 | 501-510-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | LONOKE | AR |
| 2018-10-23 | 501-510-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | LONOKE | AR |
| 2020-05-14 | 501-510-2XXX | 2000–2999 | Assigned | E. RITTER COMMUNICATIONS, LLC | 128L | LONOKE | AR |
| 2020-06-30 | 501-510-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LONOKE | AR |
| 2022-09-08 | 501-510-4XXX | 4000–4999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | LONOKE | AR |
| 2018-12-17 | 501-510-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AR | 348F | LONOKE | AR |
| 2016-02-19 | 501-510-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AR | 348F | LONOKE | AR |
| 2016-02-19 | 501-510-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AR | 348F | LONOKE | AR |
| 2018-12-17 | 501-510-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AR | 348F | LONOKE | AR |
| 2014-12-11 | 501-510-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | LONOKE | AR |
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.