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
2007-11-13 916-474-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2007-11-07 916-225-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2007-11-07 916-225-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2007-11-07 916-509-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2007-11-07 916-626-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2007-11-07 916-974-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2007-10-24 916-294-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FOLSOM CA
2007-10-19 916-706-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-10-19 916-706-7XXX 7000–7999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-10-19 916-706-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-10-19 916-904-9XXX 9000–9999Assigned METROPCS, INC. 5562 FAIR OAKS CA
2007-10-15 916-400-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2007-10-15 916-400-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2007-10-15 916-990-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2007-10-15 916-990-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2007-10-03 916-494-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2007-10-03 916-509-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2007-09-27 916-509-4XXX 4000–4999Assigned CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 2308 ELK GROVE CA
2007-09-27 916-525-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2007-09-27 916-897-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2007-09-26 916-288-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2007-09-25 916-673-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2007-09-25 916-673-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2007-09-25 916-992-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2007-09-20 916-741-1XXX 1000–1999Assigned METROPCS, INC. 5562 SO PLACER CA
2007-09-18 916-504-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2007-09-18 916-504-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2007-09-18 916-504-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2007-09-17 916-476-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2007-09-13 916-779-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2007-09-11 916-226-0XXX 0000–0999Assigned METROPCS, INC. 5562 ELK GROVE CA
2007-09-11 916-226-7XXX 7000–7999Assigned METROPCS, INC. 5562 ELK GROVE CA
2007-09-11 916-469-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2007-09-11 916-753-2XXX 2000–2999Assigned METROPCS, INC. 5562 ELK GROVE CA
2007-09-11 916-969-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2007-09-11 916-969-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2007-09-07 916-842-0XXX 0000–0999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-09-07 916-842-1XXX 1000–1999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-09-07 916-842-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-09-07 916-842-7XXX 7000–7999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-09-07 916-842-8XXX 8000–8999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-09-07 916-978-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2007-09-06 916-903-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FAIR OAKS CA
2007-09-06 916-904-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FAIR OAKS CA
2007-09-02 916-647-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ELK GROVE CA
2007-09-02 916-647-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ELK GROVE CA
2007-09-02 916-647-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ELK GROVE CA
2007-08-14 916-779-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
2007-08-14 916-779-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
2007-08-14 916-889-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J 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.