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 |
|---|---|---|---|---|---|---|---|
| 2003-09-22 | 530-431-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | RICHVALE | CA |
| 2003-09-22 | 530-435-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | GAZELLE | CA |
| 2003-09-22 | 530-436-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | GRENADA | CA |
| 2003-09-22 | 530-459-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | MONTAGUE | CA |
| 2003-09-19 | 530-235-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | DUNSMUIR | CA |
| 2003-09-19 | 530-838-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CORNING | CA |
| 2003-09-19 | 530-838-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CORNING | CA |
| 2003-09-18 | 530-264-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NEVADACITY | CA |
| 2003-09-18 | 530-264-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | NEVADACITY | CA |
| 2003-09-18 | 530-278-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | GRVY SOUTH | CA |
| 2003-09-18 | 530-278-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | GRVY SOUTH | CA |
| 2003-09-18 | 530-313-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SHINGLESPG | CA |
| 2003-09-18 | 530-313-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | SHINGLESPG | CA |
| 2003-09-18 | 530-417-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | PLVL WEST | CA |
| 2003-09-18 | 530-427-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SODA SPG | CA |
| 2003-09-18 | 530-427-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | SODA SPG | CA |
| 2003-09-18 | 530-455-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | LIVE OAK | CA |
| 2003-09-18 | 530-580-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NTAH THCY | CA |
| 2003-09-18 | 530-580-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | NTAH THCY | CA |
| 2003-09-15 | 530-401-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | AUBN MAIN | CA |
| 2003-09-15 | 530-401-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | AUBN MAIN | CA |
| 2003-09-02 | 530-301-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MARYSVILLE | CA |
| 2003-09-02 | 530-301-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MARYSVILLE | CA |
| 2003-09-02 | 530-301-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MARYSVILLE | CA |
| 2003-08-22 | 530-315-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | MARYSVILLE | CA |
| 2003-08-22 | 530-315-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | MARYSVILLE | CA |
| 2003-07-31 | 530-419-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | WOODLAND | CA |
| 2003-07-17 | 530-961-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | CHICO | CA |
| 2003-07-07 | 530-774-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | CHICO | CA |
| 2003-06-27 | 530-953-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | REDDING | CA |
| 2003-06-20 | 530-354-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | CHICO | CA |
| 2003-04-17 | 530-351-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | REDDING | CA |
| 2003-03-14 | 530-315-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | MARYSVILLE | CA |
| 2003-02-14 | 530-653-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | AUBN NORTH | CA |
| 2003-02-07 | 530-415-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | MARYSVILLE | CA |
| 2003-01-15 | 530-217-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | AUBN MAIN | CA |
| 2002-10-01 | 530-230-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | CHICO | CA |
| 2002-09-17 | 530-982-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | BUTTE CITY | CA |
| 2002-09-16 | 530-334-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | GEORGETOWN | CA |
| 2002-09-16 | 530-334-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | GEORGETOWN | CA |
| 2002-09-16 | 530-388-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | ALTA | CA |
| 2002-09-16 | 530-388-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | ALTA | CA |
| 2002-09-16 | 530-451-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | SMARTSVL | CA |
| 2002-09-16 | 530-475-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | HORNBROOK | CA |
| 2002-09-16 | 530-523-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HOMEWOOD | CA |
| 2002-09-16 | 530-523-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | HOMEWOOD | CA |
| 2002-09-16 | 530-679-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | BANGOR | CA |
| 2002-09-13 | 530-747-2XXX | 2000–2999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | DAVIS | CA |
| — | 530-820-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | AUBN MAIN | 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.