NumberResearchThousands-blocks in 530-288
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 530-288 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 530-288-0XXX | 0000–0999 | Reserved | PACIFIC BELL | 9740 | CAMPTONVL | CA |
| — | 530-288-1XXX | 1000–1999 | Reserved | PACIFIC BELL | 9740 | CAMPTONVL | CA |
| 2023-07-20 | 530-288-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | CAMPTONVL | CA |
| — | 530-288-3XXX | 3000–3999 | Reserved | PACIFIC BELL | 9740 | CAMPTONVL | CA |
| 2013-11-05 | 530-288-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | CAMPTONVL | CA |
| 2011-09-14 | 530-288-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CAMPTONVL | CA |
| 2013-11-05 | 530-288-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | CAMPTONVL | CA |
| 2007-04-26 | 530-288-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | CAMPTONVL | CA |
| 2019-06-19 | 530-288-8XXX | 8000–8999 | Assigned | FRACTEL, LLC | 965H | CAMPTONVL | CA |
| 2023-07-20 | 530-288-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | CAMPTONVL | 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.