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
2012-02-02 916-629-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 MEADOWVIEW CA
2012-01-13 916-277-3XXX 3000–3999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2012-01-13 916-277-4XXX 4000–4999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2012-01-13 916-277-5XXX 5000–5999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2012-01-04 916-262-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2011-12-22 916-436-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
2011-12-16 916-626-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SO PLACER CA
2011-12-15 916-512-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELK GROVE CA
2011-12-15 916-974-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
2011-12-14 916-262-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2011-12-07 916-262-5XXX 5000–5999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2011-12-07 916-262-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2011-12-05 916-865-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL MAIN CA
2011-11-23 916-900-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J SCRM NORTH CA
2011-11-22 916-848-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2011-11-22 916-848-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2011-11-22 916-848-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2011-11-22 916-848-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2011-11-21 916-302-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 PLEASATGRV CA
2011-11-16 916-560-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 RSVL CTHT CA
2011-11-08 916-439-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2011-11-02 916-274-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2011-11-02 916-500-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2011-11-02 916-500-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2011-11-02 916-893-0XXX 0000–0999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2011-11-02 916-905-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2011-10-26 916-895-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2011-10-26 916-945-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2011-10-19 916-757-2XXX 2000–2999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2011-10-19 916-757-7XXX 7000–7999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2011-09-28 916-999-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM NORTH CA
2011-09-19 916-672-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SO PLACER CA
2011-09-14 916-293-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2011-09-14 916-312-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MICHIGNBAR CA
2011-09-14 916-656-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C PLEASATGRV CA
2011-09-13 916-945-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2011-09-08 916-228-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2011-09-08 916-435-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2011-09-08 916-496-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2011-09-08 916-671-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FAIR OAKS CA
2011-09-02 916-666-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL MAIN CA
2011-09-02 916-932-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FOLSOM CA
2011-09-01 916-236-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ELK GROVE CA
2011-09-01 916-512-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2011-08-31 916-514-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2011-08-31 916-735-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA
2011-08-23 916-235-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2011-08-23 916-850-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2011-08-22 916-394-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2011-08-22 916-903-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS 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.