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
2016-07-26 916-701-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2016-07-22 916-562-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2016-07-22 916-562-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2016-07-22 916-562-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2016-07-22 916-562-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2016-07-22 916-883-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2016-07-22 916-883-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2016-07-22 916-883-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2016-07-19 916-280-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2016-07-19 916-280-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2016-07-19 916-620-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2016-07-19 916-701-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2016-07-19 916-701-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2016-07-15 916-754-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2016-07-15 916-884-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LINCOLN CA
2016-07-11 916-883-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM NORTH CA
2016-07-11 916-884-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2016-07-06 916-461-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FOLSOM CA
2016-07-06 916-620-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM MAIN CA
2016-06-21 916-461-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2016-06-21 916-461-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2016-06-21 916-633-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2016-06-15 916-490-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2016-06-15 916-490-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2016-06-15 916-490-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2016-06-15 916-490-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2016-06-03 916-836-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2016-05-19 916-507-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-05-19 916-507-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-05-19 916-507-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-05-19 916-656-1XXX 1000–1999Assigned HD CARRIER LLC 321J PLEASATGRV CA
2016-05-19 916-656-2XXX 2000–2999Assigned HD CARRIER LLC 321J PLEASATGRV CA
2016-05-19 916-656-4XXX 4000–4999Assigned HD CARRIER LLC 321J PLEASATGRV CA
2016-05-19 916-656-5XXX 5000–5999Assigned HD CARRIER LLC 321J PLEASATGRV CA
2016-05-17 916-280-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2016-05-17 916-280-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2016-05-17 916-280-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2016-05-17 916-755-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2016-05-17 916-755-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2016-05-11 916-840-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2016-05-11 916-840-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2016-05-11 916-840-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2016-05-11 916-840-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2016-05-06 916-953-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2016-04-27 916-755-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 RSVL MAIN CA
2016-04-19 916-305-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2016-04-19 916-953-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2016-04-11 916-507-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2016-04-11 916-507-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2016-04-11 916-507-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SCRM NORTH 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.