NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
T-MOBILE USA, INC. 446
ONVOY, LLC - CA 397
NEW CINGULAR WIRELESS PCS, LLC 374
METROPCS, INC. 362
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 331
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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2007-08-13 916-897-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2007-08-09 916-517-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2007-08-09 916-517-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2007-08-01 916-365-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2007-08-01 916-605-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2007-07-30 916-710-2XXX 2000–2999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-07-30 916-710-3XXX 3000–3999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-07-30 916-710-4XXX 4000–4999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-07-30 916-710-5XXX 5000–5999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-07-30 916-710-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-07-27 916-474-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL MAIN CA
2007-07-27 916-474-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL MAIN CA
2007-07-23 916-400-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2007-07-20 916-400-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2007-07-20 916-400-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2007-07-20 916-400-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2007-07-20 916-400-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2007-07-20 916-468-5XXX 5000–5999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 RIO LINDA CA
2007-07-19 916-778-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2007-07-18 916-288-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2007-07-18 916-903-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2007-07-17 916-243-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2007-07-17 916-243-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2007-07-16 916-897-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2007-07-02 916-286-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2007-07-02 916-293-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FOLSOM CA
2007-07-02 916-333-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM NORTH CA
2007-07-02 916-349-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2007-07-02 916-576-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2007-07-02 916-737-5XXX 5000–5999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 SCRM MAIN CA
2007-07-02 916-779-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM NORTH CA
2007-06-29 916-346-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2007-06-29 916-376-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2007-06-29 916-745-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA
2007-06-21 916-333-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2007-06-15 916-903-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FAIR OAKS CA
2007-06-12 916-596-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2007-06-08 916-872-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2007-06-01 916-304-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MICHIGNBAR CA
2007-06-01 916-435-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2007-06-01 916-943-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2007-05-30 916-751-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C RSVL MAIN CA
2007-05-29 916-409-0XXX 0000–0999Assigned PACIFIC BELL 9740 LINCOLN CA
2007-05-29 916-409-1XXX 1000–1999Assigned PACIFIC BELL 9740 LINCOLN CA
2007-05-29 916-409-8XXX 8000–8999Assigned PACIFIC BELL 9740 LINCOLN CA
2007-05-29 916-409-9XXX 9000–9999Assigned PACIFIC BELL 9740 LINCOLN CA
2007-05-25 916-333-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2007-05-25 916-333-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2007-05-25 916-333-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2007-05-25 916-333-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L 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.