NumberResearchThousands-blocks in 530-427
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 530-427 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-11-29 | 530-427-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SODA SPG | CA |
| 2003-09-18 | 530-427-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SODA SPG | CA |
| 2003-09-18 | 530-427-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | SODA SPG | CA |
| 2008-09-22 | 530-427-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | SODA SPG | CA |
| 2005-06-13 | 530-427-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SODA SPG | CA |
| 2011-05-17 | 530-427-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SODA SPG | CA |
| 2012-12-03 | 530-427-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | SODA SPG | CA |
| 2016-08-30 | 530-427-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | SODA SPG | CA |
| 2014-02-03 | 530-427-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | SODA SPG | CA |
| — | 530-427-9XXX | 9000–9999 | Reserved | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SODA SPG | 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.