NumberResearchRecent thousands-block assignments
0 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, all time — NPA 916
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 |
|---|---|---|---|---|---|---|---|
| 2003-12-30 | 916-346-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2003-11-07 | 916-290-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM MAIN | CA |
| 2003-11-07 | 916-290-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM MAIN | CA |
| 2003-11-07 | 916-290-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM MAIN | CA |
| 2003-10-24 | 916-792-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | RSVL MAIN | CA |
| 2003-10-16 | 916-218-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | RSVL MAIN | CA |
| 2003-10-16 | 916-365-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FOLSOM | CA |
| 2003-09-24 | 916-295-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | LINCOLN | CA |
| 2003-09-23 | 916-209-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | LINCOLN | CA |
| 2003-09-23 | 916-237-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | RIO LINDA | CA |
| 2003-09-23 | 916-251-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SO PLACER | CA |
| 2003-09-23 | 916-253-3XXX | 3000–3999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2003-09-23 | 916-543-0XXX | 0000–0999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2003-09-23 | 916-543-2XXX | 2000–2999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2003-09-23 | 916-543-3XXX | 3000–3999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2003-09-23 | 916-543-4XXX | 4000–4999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2003-09-23 | 916-543-5XXX | 5000–5999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2003-09-23 | 916-543-6XXX | 6000–6999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2003-09-23 | 916-543-7XXX | 7000–7999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2003-09-23 | 916-543-8XXX | 8000–8999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2003-09-23 | 916-543-9XXX | 9000–9999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2003-09-17 | 916-256-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM NORTH | CA |
| 2003-09-17 | 916-915-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | RIO LINDA | CA |
| 2003-09-15 | 916-570-2XXX | 2000–2999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2003-09-15 | 916-570-3XXX | 3000–3999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2003-09-09 | 916-256-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | SCRM NORTH | CA |
| 2003-09-09 | 916-256-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | SCRM NORTH | CA |
| 2003-09-09 | 916-256-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | SCRM NORTH | CA |
| 2003-09-09 | 916-256-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | SCRM NORTH | CA |
| 2003-09-09 | 916-256-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | SCRM NORTH | CA |
| 2003-09-09 | 916-370-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | FOLSOM | CA |
| 2003-09-09 | 916-370-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | FOLSOM | CA |
| 2003-09-09 | 916-459-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | FAIR OAKS | CA |
| 2003-09-09 | 916-459-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | FAIR OAKS | CA |
| 2003-09-09 | 916-459-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | FAIR OAKS | CA |
| 2003-09-09 | 916-459-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | FAIR OAKS | CA |
| 2003-09-09 | 916-459-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | FAIR OAKS | CA |
| 2003-09-09 | 916-912-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2003-09-09 | 916-912-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2003-09-09 | 916-912-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2003-09-09 | 916-912-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2003-09-09 | 916-912-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2003-08-22 | 916-271-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | ELK GROVE | CA |
| 2003-08-22 | 916-271-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | ELK GROVE | CA |
| 2003-08-22 | 916-271-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | ELK GROVE | CA |
| 2003-08-21 | 916-239-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM NORTH | CA |
| 2003-08-15 | 916-580-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RSVL MAIN | CA |
| 2003-08-15 | 916-580-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RSVL MAIN | CA |
| 2003-08-15 | 916-580-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RSVL MAIN | CA |
| 2003-07-31 | 916-283-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SCRM NORTH | 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.