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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Jun 2026
May 2026
Apr 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2008-11-10 | 916-637-9XXX | 9000–9999 | Assigned | PAETEC ITEL, LLC | 829J | SCRM MAIN | CA |
| 2008-11-05 | 916-550-5XXX | 5000–5999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2008-11-03 | 916-504-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2008-11-03 | 916-504-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2008-11-03 | 916-504-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2008-11-03 | 916-504-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2008-11-03 | 916-604-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | SCRM NORTH | CA |
| 2008-11-03 | 916-604-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SCRM NORTH | CA |
| 2008-11-03 | 916-604-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | SCRM NORTH | CA |
| 2008-11-03 | 916-706-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2008-10-31 | 916-550-0XXX | 0000–0999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SCRM NORTH | CA |
| 2008-10-31 | 916-550-1XXX | 1000–1999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SCRM NORTH | CA |
| 2008-10-31 | 916-550-2XXX | 2000–2999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SCRM NORTH | CA |
| 2008-10-27 | 916-585-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | ELK GROVE | CA |
| 2008-10-27 | 916-585-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | ELK GROVE | CA |
| 2008-10-20 | 916-504-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SCRM MAIN | CA |
| 2008-10-14 | 916-504-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2008-10-13 | 916-467-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FOLSOM | CA |
| 2008-09-30 | 916-350-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | FOLSOM | CA |
| 2008-09-24 | 916-467-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | FOLSOM | CA |
| 2008-09-23 | 916-897-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ELK GROVE | CA |
| 2008-09-23 | 916-934-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FOLSOM | CA |
| 2008-09-22 | 916-865-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RSVL MAIN | CA |
| 2008-09-22 | 916-865-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RSVL MAIN | CA |
| 2008-09-12 | 916-671-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | FAIR OAKS | CA |
| 2008-09-11 | 916-342-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FAIR OAKS | CA |
| 2008-09-11 | 916-817-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FOLSOM | CA |
| 2008-09-10 | 916-474-8XXX | 8000–8999 | Assigned | CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY | 2334 | RSVL MAIN | CA |
| 2008-09-09 | 916-294-7XXX | 7000–7999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | FOLSOM | CA |
| 2008-09-09 | 916-667-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | ELK GROVE | CA |
| 2008-09-09 | 916-667-9XXX | 9000–9999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | ELK GROVE | CA |
| 2008-09-08 | 916-476-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2008-09-08 | 916-527-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | WALNUT GRV | CA |
| 2008-09-08 | 916-626-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SO PLACER | CA |
| 2008-09-08 | 916-865-4XXX | 4000–4999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | RSVL MAIN | CA |
| 2008-09-04 | 916-667-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ELK GROVE | CA |
| 2008-09-04 | 916-993-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM NORTH | CA |
| 2008-08-28 | 916-745-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RSVL CTHT | CA |
| 2008-08-13 | 916-745-4XXX | 4000–4999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | RSVL CTHT | CA |
| 2008-08-07 | 916-281-3XXX | 3000–3999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7174 | SCRM MAIN | CA |
| 2008-08-04 | 916-476-3XXX | 3000–3999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SCRM MAIN | CA |
| 2008-08-04 | 916-476-4XXX | 4000–4999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SCRM MAIN | CA |
| 2008-08-04 | 916-476-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SCRM MAIN | CA |
| 2008-08-04 | 916-476-6XXX | 6000–6999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SCRM MAIN | CA |
| 2008-08-01 | 916-520-5XXX | 5000–5999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7174 | SCRM MAIN | CA |
| 2008-07-25 | 916-469-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM MAIN | CA |
| 2008-07-25 | 916-469-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM MAIN | CA |
| 2008-07-24 | 916-865-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RSVL MAIN | CA |
| 2008-07-22 | 916-660-7XXX | 7000–7999 | Assigned | PACIFIC BELL | 9740 | SO PLACER | CA |
| 2008-07-22 | 916-660-8XXX | 8000–8999 | Assigned | PACIFIC BELL | 9740 | SO PLACER | 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.