NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 530
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-12-06 | 530-485-4XXX | 4000–4999 | Assigned | ASTOUND BROADBAND, LLC - CA | 485E | AUBN MAIN | CA |
| 2018-02-27 | 530-421-3XXX | 3000–3999 | Assigned | ASTOUND BROADBAND, LLC - CA | 485E | KNIGHTSLDG | CA |
| 2018-02-16 | 530-419-8XXX | 8000–8999 | Assigned | ASTOUND BROADBAND, LLC - CA | 485E | WOODLAND | CA |
| 2016-04-21 | 530-537-2XXX | 2000–2999 | Assigned | ASTOUND BROADBAND, LLC - CA | 485E | AUBN MAIN | CA |
| 2012-10-11 | 530-878-5XXX | 5000–5999 | Assigned | ASTOUND BROADBAND, LLC - CA | 485E | AUBN MAIN | CA |
| 2012-06-01 | 530-512-5XXX | 5000–5999 | Assigned | ASTOUND BROADBAND, LLC - CA | 485E | COLFAX | CA |
| 2009-04-01 | 530-402-1XXX | 1000–1999 | Assigned | ASTOUND BROADBAND, LLC - CA | 485E | WOODLAND | CA |
| 2009-04-01 | 530-746-4XXX | 4000–4999 | Assigned | ASTOUND BROADBAND, LLC - CA | 485E | DAVIS | CA |
| 2009-04-01 | 530-794-6XXX | 6000–6999 | Assigned | ASTOUND BROADBAND, LLC - CA | 485E | WINTERS | CA |
| 2009-04-01 | 530-820-3XXX | 3000–3999 | Assigned | ASTOUND BROADBAND, LLC - CA | 485E | AUBN MAIN | CA |
| 2008-05-23 | 530-723-5XXX | 5000–5999 | Assigned | ASTOUND BROADBAND, LLC - CA | 485E | WOODLAND | 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.