NumberResearchRecent thousands-block assignments
24 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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 |
|---|---|---|---|---|---|---|---|
| 2014-02-11 | 530-360-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ANDERSON | CA |
| 2014-02-11 | 530-446-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | GRVY MAIN | CA |
| 2014-02-11 | 530-489-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | HOMEWOOD | CA |
| 2014-02-11 | 530-492-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | AUBN MAIN | CA |
| 2014-02-11 | 530-728-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | GRVY SOUTH | CA |
| 2014-02-04 | 530-349-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | COLFAX | CA |
| 2014-02-03 | 530-412-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | NTAH THCY | CA |
| 2014-02-03 | 530-427-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | SODA SPG | CA |
| 2014-02-03 | 530-830-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | AUBN NORTH | CA |
| 2014-01-29 | 530-809-4XXX | 4000–4999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CHICO | CA |
| 2013-12-31 | 530-847-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ALTA | CA |
| 2013-12-27 | 530-466-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ALLEGHANY | CA |
| 2013-12-12 | 530-206-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PLVL KYBRZ | CA |
| 2013-12-12 | 530-312-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | WOODLAND | CA |
| 2013-12-11 | 530-379-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | WOODLAND | CA |
| 2013-12-06 | 530-500-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | DUNSMUIR | CA |
| 2013-12-06 | 530-657-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | WEED | CA |
| 2013-12-06 | 530-900-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | CORNING | CA |
| 2013-12-06 | 530-988-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | ORLAND | CA |
| 2013-12-05 | 530-708-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ALTURAS | CA |
| 2013-11-25 | 530-497-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | PLVL WEST | CA |
| 2013-11-25 | 530-594-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | GRIDLEY | CA |
| 2013-11-22 | 530-488-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | AUBN MAIN | CA |
| 2013-11-21 | 530-379-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WOODLAND | CA |
| 2013-11-05 | 530-288-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | CAMPTONVL | CA |
| 2013-11-05 | 530-288-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | CAMPTONVL | CA |
| 2013-11-05 | 530-387-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | SHINGLESPG | CA |
| 2013-11-05 | 530-387-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | SHINGLESPG | CA |
| 2013-11-05 | 530-444-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | GEORGETOWN | CA |
| 2013-11-05 | 530-444-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | GEORGETOWN | CA |
| 2013-11-05 | 530-482-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | SODA SPG | CA |
| 2013-11-05 | 530-482-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | SODA SPG | CA |
| 2013-11-05 | 530-508-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | DUNNIGAN | CA |
| 2013-11-05 | 530-512-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | COLFAX | CA |
| 2013-11-05 | 530-512-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | COLFAX | CA |
| 2013-11-05 | 530-617-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | LIVE OAK | CA |
| 2013-11-05 | 530-617-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | LIVE OAK | CA |
| 2013-11-05 | 530-641-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | WHEATLAND | CA |
| 2013-11-05 | 530-641-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | WHEATLAND | CA |
| 2013-11-05 | 530-655-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | NICOLAUS | CA |
| 2013-11-05 | 530-655-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | NICOLAUS | CA |
| 2013-11-05 | 530-724-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | DUNNIGAN | CA |
| 2013-11-05 | 530-787-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | ESPARTO | CA |
| 2013-11-05 | 530-787-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | ESPARTO | CA |
| 2013-11-05 | 530-862-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | DOWNIEVL | CA |
| 2013-11-05 | 530-862-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | DOWNIEVL | CA |
| 2013-11-04 | 530-290-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | ALLEGHANY | CA |
| 2013-11-04 | 530-290-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | ALLEGHANY | CA |
| 2013-11-04 | 530-536-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | TRUCKEE | CA |
| 2013-11-04 | 530-536-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | TRUCKEE | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.