NumberResearchThousands-blocks in 530-772
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 530-772 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 |
|---|---|---|---|---|---|---|---|
| 2017-04-13 | 530-772-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | CHALLENGE | CA |
| — | 530-772-1XXX | 1000–1999 | Reserved | IP HORIZON LLC | 515J | CHALLENGE | CA |
| — | 530-772-2XXX | 2000–2999 | Reserved | IP HORIZON LLC | 515J | CHALLENGE | CA |
| 2017-05-12 | 530-772-3XXX | 3000–3999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CHALLENGE | CA |
| 2022-06-09 | 530-772-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CHALLENGE | CA |
| 2005-06-21 | 530-772-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CHALLENGE | CA |
| 2021-04-12 | 530-772-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | CHALLENGE | CA |
| 2022-03-14 | 530-772-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | CHALLENGE | CA |
| 2021-06-22 | 530-772-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | CHALLENGE | CA |
| 2021-07-15 | 530-772-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | CHALLENGE | 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.