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
2009-09-04 916-534-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2009-09-04 916-990-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2009-09-03 916-740-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2009-09-01 916-231-8XXX 8000–8999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7174 SCRM MAIN CA
2009-08-28 916-778-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2009-08-26 916-740-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2009-08-18 916-672-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SO PLACER CA
2009-08-18 916-915-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2009-08-12 916-678-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
2009-07-30 916-476-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2009-07-10 916-692-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SCRM NORTH CA
2009-07-07 916-409-2XXX 2000–2999Assigned ASTOUND BROADBAND, LLC - CA 485E LINCOLN CA
2009-07-01 916-374-5XXX 5000–5999Assigned IP HORIZON LLC 515J SCRM MAIN CA
2009-06-24 916-807-1XXX 1000–1999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-807-2XXX 2000–2999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-807-3XXX 3000–3999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-807-5XXX 5000–5999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-807-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-807-7XXX 7000–7999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-807-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-862-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-862-7XXX 7000–7999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-862-8XXX 8000–8999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-889-0XXX 0000–0999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-889-1XXX 1000–1999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-889-2XXX 2000–2999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-889-5XXX 5000–5999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-24 916-889-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2009-06-23 916-604-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2009-06-16 916-740-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RSVL MAIN CA
2009-06-16 916-740-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RSVL MAIN CA
2009-06-03 916-992-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2009-05-28 916-259-2XXX 2000–2999Assigned ASTOUND BROADBAND, LLC - CA 485E SO PLACER CA
2009-05-20 916-678-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM NORTH CA
2009-05-14 916-254-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2009-05-07 916-287-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SCRM MAIN CA
2009-05-06 916-667-7XXX 7000–7999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7174 ELK GROVE CA
2009-04-29 916-436-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FAIR OAKS CA
2009-04-29 916-667-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ELK GROVE CA
2009-04-28 916-668-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2009-04-16 916-241-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J FAIR OAKS CA
2009-04-15 916-520-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2009-04-15 916-520-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2009-04-14 916-865-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL MAIN CA
2009-04-09 916-675-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2009-04-07 916-740-2XXX 2000–2999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 RSVL MAIN CA
2009-04-07 916-740-3XXX 3000–3999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 RSVL MAIN CA
2009-04-07 916-932-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2009-04-06 916-604-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J SCRM NORTH CA
2009-04-01 916-209-3XXX 3000–3999Assigned ASTOUND BROADBAND, LLC - CA 485E 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.