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
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2008-07-18 | 916-409-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LINCOLN | CA |
| 2008-07-18 | 916-476-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2008-07-18 | 916-476-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2008-07-16 | 916-993-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SCRM NORTH | CA |
| 2008-07-16 | 916-993-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SCRM NORTH | CA |
| 2008-07-11 | 916-200-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FAIR OAKS | CA |
| 2008-07-11 | 916-534-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FAIR OAKS | CA |
| 2008-07-08 | 916-374-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SCRM MAIN | CA |
| 2008-07-03 | 916-993-6XXX | 6000–6999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SCRM NORTH | CA |
| 2008-07-03 | 916-993-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SCRM NORTH | CA |
| 2008-07-03 | 916-993-9XXX | 9000–9999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SCRM NORTH | CA |
| 2008-06-30 | 916-667-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | ELK GROVE | CA |
| 2008-06-30 | 916-667-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | ELK GROVE | CA |
| 2008-06-30 | 916-676-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | RSVL CTHT | CA |
| 2008-06-30 | 916-910-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | RSVL CTHT | CA |
| 2008-06-30 | 916-969-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | FAIR OAKS | CA |
| 2008-06-30 | 916-969-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | FAIR OAKS | CA |
| 2008-06-26 | 916-660-4XXX | 4000–4999 | Assigned | PACIFIC BELL | 9740 | SO PLACER | CA |
| 2008-06-24 | 916-238-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | RIO LINDA | CA |
| 2008-06-24 | 916-468-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIO LINDA | CA |
| 2008-06-23 | 916-380-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RSVL MAIN | CA |
| 2008-06-20 | 916-469-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | SCRM MAIN | CA |
| 2008-06-13 | 916-498-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2008-06-11 | 916-872-4XXX | 4000–4999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2008-06-11 | 916-872-8XXX | 8000–8999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | RSVL MAIN | CA |
| 2008-06-11 | 916-993-4XXX | 4000–4999 | Assigned | FIDIUM ENTERPRISE SERVICES, LLC | 3964 | SCRM NORTH | CA |
| 2008-06-04 | 916-667-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ELK GROVE | CA |
| 2008-06-04 | 916-969-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FAIR OAKS | CA |
| 2008-06-04 | 916-969-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FAIR OAKS | CA |
| 2008-06-04 | 916-993-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM NORTH | CA |
| 2008-06-03 | 916-469-9XXX | 9000–9999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SCRM MAIN | CA |
| 2008-05-30 | 916-660-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SO PLACER | CA |
| 2008-05-23 | 916-873-8XXX | 8000–8999 | Assigned | ASTOUND BROADBAND, LLC - CA | 485E | SCRM MAIN | CA |
| 2008-05-02 | 916-993-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM NORTH | CA |
| 2008-05-02 | 916-993-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SCRM NORTH | CA |
| 2008-05-01 | 916-295-5XXX | 5000–5999 | Assigned | PACIFIC BELL | 9740 | LINCOLN | CA |
| 2008-05-01 | 916-596-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2008-04-30 | 916-850-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FOLSOM | CA |
| 2008-04-16 | 916-865-1XXX | 1000–1999 | Assigned | CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY | 2334 | RSVL MAIN | CA |
| 2008-04-15 | 916-534-7XXX | 7000–7999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | FAIR OAKS | CA |
| 2008-04-07 | 916-474-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RSVL MAIN | CA |
| 2008-04-07 | 916-474-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RSVL MAIN | CA |
| 2008-04-07 | 916-617-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2008-04-07 | 916-660-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SO PLACER | CA |
| 2008-04-07 | 916-856-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2008-04-07 | 916-856-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | SCRM MAIN | CA |
| 2008-04-03 | 916-538-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SCRM MAIN | CA |
| 2008-04-03 | 916-667-0XXX | 0000–0999 | Assigned | CITIZENS TELECOM CA. DBA FRONTIER COM OF CA | 2308 | ELK GROVE | CA |
| 2008-03-26 | 916-751-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RSVL MAIN | CA |
| 2008-03-26 | 916-751-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RSVL 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.