NumberResearchThousands-blocks in 530-500
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 530-500 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 530 blocks
Most active assignees, all time — NPA 530
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 |
|---|---|---|---|---|---|---|---|
| 2011-04-28 | 530-500-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | DUNSMUIR | CA |
| 2011-03-30 | 530-500-1XXX | 1000–1999 | Assigned | SNOWCREST TELEPHONE, INC -CA | 103G | DUNSMUIR | CA |
| 2013-09-25 | 530-500-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DUNSMUIR | CA |
| 2013-12-06 | 530-500-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | DUNSMUIR | CA |
| 2015-07-13 | 530-500-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DUNSMUIR | CA |
| 2015-08-24 | 530-500-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | DUNSMUIR | CA |
| 2017-04-13 | 530-500-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | DUNSMUIR | CA |
| 2016-12-28 | 530-500-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DUNSMUIR | CA |
| 2018-06-15 | 530-500-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | DUNSMUIR | CA |
| 2021-06-23 | 530-500-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | DUNSMUIR | CA |
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.