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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2003-07-18 | 916-673-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FOLSOM | CA |
| 2003-07-14 | 916-673-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FOLSOM | CA |
| 2003-06-11 | 916-256-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | SCRM NORTH | CA |
| 2003-06-11 | 916-271-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | ELK GROVE | CA |
| 2003-06-11 | 916-459-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | FAIR OAKS | CA |
| 2003-05-12 | 916-283-4XXX | 4000–4999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2003-05-12 | 916-283-5XXX | 5000–5999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2003-05-12 | 916-283-6XXX | 6000–6999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2003-05-12 | 916-746-7XXX | 7000–7999 | Assigned | CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY | 2334 | RSVL MAIN | CA |
| 2003-05-12 | 916-746-8XXX | 8000–8999 | Assigned | CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY | 2334 | RSVL MAIN | CA |
| 2003-04-07 | 916-346-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2003-04-07 | 916-346-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2003-04-07 | 916-515-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | SCRM NORTH | CA |
| 2003-04-04 | 916-577-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SO PLACER | CA |
| 2003-03-31 | 916-640-2XXX | 2000–2999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2003-03-07 | 916-290-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM MAIN | CA |
| 2003-03-07 | 916-290-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM MAIN | CA |
| 2002-12-12 | 916-233-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-12 | 916-233-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-12 | 916-233-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-12 | 916-233-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-12 | 916-233-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-12 | 916-267-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-12 | 916-267-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-12 | 916-267-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-12 | 916-267-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-12 | 916-267-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-12 | 916-267-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-12 | 916-290-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-12 | 916-290-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2002-12-09 | 916-408-7XXX | 7000–7999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2002-12-09 | 916-408-8XXX | 8000–8999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2002-10-29 | 916-238-2XXX | 2000–2999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RIO LINDA | CA |
| 2002-09-27 | 916-359-8XXX | 8000–8999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2002-09-19 | 916-283-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | SCRM NORTH | CA |
| 2002-09-09 | 916-408-5XXX | 5000–5999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2002-09-09 | 916-746-2XXX | 2000–2999 | Assigned | CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY | 2334 | RSVL MAIN | CA |
| 2002-09-09 | 916-746-4XXX | 4000–4999 | Assigned | CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY | 2334 | RSVL MAIN | CA |
| 2002-09-09 | 916-746-5XXX | 5000–5999 | Assigned | CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY | 2334 | RSVL MAIN | CA |
| 2002-09-09 | 916-746-6XXX | 6000–6999 | Assigned | CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY | 2334 | RSVL MAIN | CA |
| 2002-08-14 | 916-669-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM MAIN | CA |
| 2002-01-14 | 916-673-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FOLSOM | CA |
| 2001-08-27 | 916-669-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM MAIN | 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.