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
2008-03-26 916-817-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2008-03-26 916-817-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2008-03-26 916-872-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2008-03-25 916-751-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2008-03-24 916-520-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2008-03-18 916-817-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FOLSOM CA
2008-03-18 916-943-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2008-03-18 916-943-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2008-03-07 916-200-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2008-03-07 916-200-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2008-03-07 916-200-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2008-03-06 916-380-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL MAIN CA
2008-03-06 916-751-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL MAIN CA
2008-03-04 916-514-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2008-02-19 916-509-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ELK GROVE CA
2008-02-19 916-627-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ELK GROVE CA
2008-02-15 916-910-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA
2008-02-13 916-914-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2008-02-13 916-914-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2008-02-08 916-509-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK GROVE CA
2008-02-08 916-872-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2008-02-07 916-509-6XXX 6000–6999Assigned METROPCS, INC. 5562 ELK GROVE CA
2008-02-07 916-969-2XXX 2000–2999Assigned METROPCS, INC. 5562 FAIR OAKS CA
2008-02-07 916-969-3XXX 3000–3999Assigned METROPCS, INC. 5562 FAIR OAKS CA
2008-02-06 916-295-2XXX 2000–2999Assigned METROPCS, INC. 5562 LINCOLN CA
2008-02-06 916-295-3XXX 3000–3999Assigned METROPCS, INC. 5562 LINCOLN CA
2008-01-31 916-596-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2008-01-24 916-807-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2008-01-23 916-258-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LINCOLN CA
2008-01-23 916-295-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LINCOLN CA
2008-01-23 916-872-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RSVL MAIN CA
2008-01-18 916-509-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2008-01-14 916-258-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LINCOLN CA
2008-01-14 916-293-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FOLSOM CA
2008-01-14 916-509-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK GROVE CA
2008-01-14 916-514-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
2008-01-10 916-380-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2008-01-10 916-872-1XXX 1000–1999Assigned ASTOUND BROADBAND, LLC - CA 485E RSVL MAIN CA
2007-12-26 916-509-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2007-12-26 916-990-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2007-12-21 916-706-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2007-12-20 916-514-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2007-12-10 916-842-4XXX 4000–4999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-12-10 916-842-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-12-10 916-893-1XXX 1000–1999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-12-07 916-335-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2007-12-07 916-943-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2007-11-16 916-514-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2007-11-16 916-514-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2007-11-14 916-509-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 ELK GROVE 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.