NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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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Jun 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-04-19 | 530-504-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | WINTERS | CA |
| 2022-03-21 | 530-784-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | WEAVERVL | CA |
| 2021-08-25 | 530-779-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MILLVILLE | CA |
| 2018-01-11 | 530-336-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | FALLRVRMLS | CA |
| 2017-07-11 | 530-543-9XXX | 9000–9999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SOUTHTAHOE | CA |
| 2017-01-13 | 530-806-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | REDDING | CA |
| 2016-12-14 | 530-900-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | CORNING | CA |
| 2016-12-08 | 530-803-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | COTTONWOOD | CA |
| 2016-06-15 | 530-547-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MILLVILLE | CA |
| 2016-03-08 | 530-238-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SHASTALAKE | CA |
| 2015-10-29 | 530-762-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PARADISE | CA |
| 2015-06-29 | 530-426-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SODA SPG | CA |
| 2015-03-16 | 530-691-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | REDDING | CA |
| 2015-03-13 | 530-558-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SHINGLESPG | CA |
| 2013-09-05 | 530-322-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PORTOLA | CA |
| 2013-07-16 | 530-384-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LOSMOLINOS | CA |
| 2013-06-20 | 530-353-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | OROVILLE | CA |
| 2013-06-20 | 530-476-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | ARBUCKLE | CA |
| 2013-06-20 | 530-619-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | COLUSA | CA |
| 2013-06-20 | 530-988-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | ORLAND | CA |
| 2012-09-18 | 530-360-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | ANDERSON | CA |
| 2011-10-04 | 530-568-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MT SHASTA | CA |
| 2011-10-04 | 530-937-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | YREKA | CA |
| 2011-06-28 | 530-938-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | WEED | CA |
| 2010-12-09 | 530-280-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | QUINCY | CA |
| 2010-11-12 | 530-797-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | GRIDLEY | CA |
| 2008-08-19 | 530-361-8XXX | 8000–8999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | WILLOWS | CA |
| 2008-08-19 | 530-553-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | NTAH BCWY | CA |
| 2008-08-19 | 530-567-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | RED BLUFF | CA |
| 2008-08-19 | 530-580-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | NTAH THCY | CA |
| 2005-04-08 | 530-262-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | REDDING | CA |
| 2005-03-31 | 530-269-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | AUBN NORTH | CA |
| 2005-03-31 | 530-278-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | GRVY SOUTH | CA |
| 2005-03-31 | 530-293-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PLVL KYBRZ | CA |
| 2005-03-31 | 530-545-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SOUTHTAHOE | CA |
| 2005-03-31 | 530-550-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TRUCKEE | CA |
| 2005-03-31 | 530-575-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | GRVY MAIN | CA |
| 2005-03-31 | 530-647-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PLVL WEST | CA |
| 2005-03-31 | 530-663-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | PLVL SOUTH | CA |
| 2005-03-31 | 530-665-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | WOODLAND | CA |
| 2005-03-31 | 530-740-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MARYSVILLE | CA |
| 2005-03-31 | 530-747-1XXX | 1000–1999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | DAVIS | CA |
| 2005-03-31 | 530-820-5XXX | 5000–5999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | AUBN MAIN | CA |
| 2005-03-31 | 530-897-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | CHICO | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.