NumberResearchThousands-blocks in 530-255
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 530-255 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
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Jun 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-08-09 | 530-255-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | REDDING | CA |
| — | 530-255-1XXX | 1000–1999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | REDDING | CA |
| — | 530-255-2XXX | 2000–2999 | Reserved | ONVOY, LLC - CA | 649C | REDDING | CA |
| 2021-04-02 | 530-255-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | REDDING | CA |
| 2010-03-03 | 530-255-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDDING | CA |
| 2023-05-04 | 530-255-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | REDDING | CA |
| — | 530-255-6XXX | 6000–6999 | Reserved | ONVOY, LLC - CA | 649C | REDDING | CA |
| 2024-07-03 | 530-255-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | REDDING | CA |
| 2010-05-03 | 530-255-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | REDDING | CA |
| 2023-06-08 | 530-255-9XXX | 9000–9999 | Assigned | NUSO, LLC | 732J | REDDING | CA |
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.