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
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-10-08 | 530-372-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RICHVALE | CA |
| 2024-10-08 | 530-831-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PORTOLA | CA |
| 2024-10-08 | 530-833-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PASKENTA | CA |
| 2024-10-08 | 530-942-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SIERRAVL | CA |
| 2024-10-08 | 530-963-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | STONYFORD | CA |
| 2024-10-08 | 530-984-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BLAIRSDEN | CA |
| 2024-10-08 | 530-985-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GAZELLE | CA |
| 2024-10-07 | 530-359-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRENCHGLCH | CA |
| 2024-10-07 | 530-454-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MERIDIAN | CA |
| 2024-10-07 | 530-705-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CHALLENGE | CA |
| 2024-10-07 | 530-729-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HORNBROOK | CA |
| 2024-10-07 | 530-778-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LEWISTON | CA |
| 2024-10-07 | 530-968-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ELK CREEK | CA |
| 2024-10-07 | 530-982-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BUTTE CITY | CA |
| 2024-10-07 | 530-989-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NORTH YUBA | CA |
| 2016-07-15 | 530-441-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MARYSVILLE | CA |
| 2015-02-26 | 530-650-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WOODLAND | CA |
| 2014-04-14 | 530-777-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MARYSVILLE | CA |
| 2013-01-24 | 530-293-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PLVL KYBRZ | CA |
| 2013-01-24 | 530-347-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | COTTONWOOD | CA |
| 2013-01-24 | 530-436-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GRENADA | CA |
| 2012-11-07 | 530-330-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WILLOWS | CA |
| 2012-11-07 | 530-408-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WEED | CA |
| 2012-01-04 | 530-461-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BANGOR | CA |
| 2011-12-08 | 530-847-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ALTA | CA |
| 2011-09-14 | 530-288-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CAMPTONVL | CA |
| 2011-09-14 | 530-292-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NOSAN JUAN | CA |
| 2011-09-14 | 530-334-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GEORGETOWN | CA |
| 2011-09-14 | 530-639-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SMARTSVL | CA |
| 2011-09-14 | 530-655-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | NICOLAUS | CA |
| 2011-09-14 | 530-797-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GRIDLEY | CA |
| 2011-09-14 | 530-862-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DOWNIEVL | CA |
| 2011-08-11 | 530-479-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VERDI | CA |
| 2011-07-28 | 530-762-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PARADISE | CA |
| 2011-07-26 | 530-235-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DUNSMUIR | CA |
| 2011-07-26 | 530-394-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | QUINCY | CA |
| 2011-07-26 | 530-459-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MONTAGUE | CA |
| 2011-07-26 | 530-576-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LOSMOLINOS | CA |
| 2011-07-26 | 530-732-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GERBER | CA |
| 2011-07-26 | 530-861-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | VINA | CA |
| 2011-07-26 | 530-868-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BIGGS | CA |
| 2011-07-26 | 530-918-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MT SHASTA | CA |
| 2011-07-26 | 530-962-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SHASTALAKE | CA |
| 2011-07-26 | 530-988-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ORLAND | CA |
| 2011-07-26 | 530-993-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LOYALTON | CA |
| 2011-06-08 | 530-276-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | REDDING | CA |
| 2011-06-08 | 530-586-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CORNING | CA |
| 2011-06-08 | 530-643-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | YREKA | CA |
| 2011-06-08 | 530-712-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OROVILLE | CA |
| 2011-06-08 | 530-727-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RED BLUFF | 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.