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
2011-04-28 916-900-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM NORTH CA
2011-04-28 916-945-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RSVL MAIN CA
2011-04-19 916-343-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LINCOLN CA
2011-04-13 916-544-6XXX 6000–6999Assigned CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 2308 ELK GROVE CA
2011-04-07 916-751-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2011-04-07 916-878-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2011-04-07 916-945-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2011-03-31 916-287-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-03-31 916-520-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-03-31 916-538-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-03-31 916-642-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-03-31 916-668-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-03-31 916-720-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-03-31 916-822-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-03-31 916-822-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-03-31 916-822-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-03-31 916-822-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-03-30 916-842-3XXX 3000–3999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 SCRM MAIN CA
2011-03-25 916-756-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COURTLAND CA
2011-03-25 916-756-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COURTLAND CA
2011-03-23 916-790-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C FOLSOM CA
2011-03-15 916-895-7XXX 7000–7999Assigned FRONTIER COMMUNICATIONS OF AMERICA, INC. - CA 006E ELK GROVE CA
2011-03-08 916-546-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2011-03-08 916-626-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2011-03-01 916-666-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RSVL MAIN CA
2011-02-24 916-414-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2011-02-17 916-274-1XXX 1000–1999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2011-02-17 916-274-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2011-02-17 916-544-3XXX 3000–3999Assigned METROPCS, INC. 5562 ELK GROVE CA
2011-02-17 916-544-4XXX 4000–4999Assigned METROPCS, INC. 5562 ELK GROVE CA
2011-02-17 916-877-0XXX 0000–0999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2011-02-17 916-877-1XXX 1000–1999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2011-02-17 916-923-8XXX 8000–8999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2011-02-16 916-999-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
2011-02-15 916-740-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2011-02-15 916-742-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2011-02-09 916-585-0XXX 0000–0999Assigned METROPCS, INC. 5562 ELK GROVE CA
2011-02-09 916-728-0XXX 0000–0999Assigned METROPCS, INC. 5562 RSVL CTHT CA
2011-02-09 916-728-8XXX 8000–8999Assigned METROPCS, INC. 5562 RSVL CTHT CA
2011-01-31 916-403-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM MAIN CA
2011-01-31 916-403-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM MAIN CA
2011-01-28 916-905-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-01-28 916-905-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-01-28 916-905-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-01-28 916-905-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-01-28 916-905-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-01-28 916-905-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-01-28 916-905-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-01-28 916-918-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2011-01-26 916-209-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN 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.