NumberResearchRecent thousands-block assignments
31 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, last 30 days — NPA 530
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-04-08 | 530-262-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | REDDING | CA |
| 2005-04-01 | 530-207-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | WOODLAND | CA |
| 2005-04-01 | 530-601-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | DAVIS | 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 |
| 2005-03-16 | 530-207-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | WOODLAND | CA |
| 2005-03-14 | 530-646-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | REDDING | CA |
| 2005-03-10 | 530-401-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | AUBN MAIN | CA |
| 2005-03-10 | 530-401-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | AUBN MAIN | CA |
| 2005-03-09 | 530-216-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | MARYSVILLE | CA |
| 2005-03-07 | 530-820-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | AUBN MAIN | CA |
| 2005-03-07 | 530-820-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | AUBN MAIN | CA |
| 2005-03-07 | 530-820-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | AUBN MAIN | CA |
| 2005-03-07 | 530-852-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBN MAIN | CA |
| 2005-03-07 | 530-852-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBN MAIN | CA |
| 2005-03-07 | 530-852-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBN MAIN | CA |
| 2005-03-07 | 530-852-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBN MAIN | CA |
| 2005-03-06 | 530-318-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SOUTHTAHOE | CA |
| 2005-03-06 | 530-383-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WOODLAND | CA |
| 2005-03-06 | 530-383-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WOODLAND | CA |
| 2005-02-25 | 530-613-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | AUBN MAIN | CA |
| 2005-02-24 | 530-329-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MARYSVILLE | CA |
| 2005-02-24 | 530-329-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MARYSVILLE | CA |
| 2005-02-24 | 530-329-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MARYSVILLE | CA |
| 2005-02-24 | 530-329-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MARYSVILLE | CA |
| 2005-02-23 | 530-276-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REDDING | CA |
| 2005-02-23 | 530-276-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REDDING | CA |
| 2005-02-23 | 530-276-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REDDING | CA |
| 2005-02-23 | 530-276-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REDDING | CA |
| 2005-02-23 | 530-276-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REDDING | CA |
| 2005-02-23 | 530-355-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REDDING | CA |
| 2005-02-23 | 530-355-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | REDDING | CA |
| 2005-02-23 | 530-554-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DAVIS | CA |
| 2005-02-23 | 530-554-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DAVIS | CA |
| 2005-02-23 | 530-592-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHICO | CA |
| 2005-02-23 | 530-592-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHICO | CA |
| 2005-02-23 | 530-592-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHICO | CA |
| 2005-02-23 | 530-592-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHICO | CA |
| 2005-02-23 | 530-592-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHICO | 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.