NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2013-09-23 916-887-8XXX 8000–8999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-9XXX 9000–9999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-20 916-571-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J SCRM NORTH CA
2013-09-19 916-292-3XXX 3000–3999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 FOLSOM CA
2013-09-17 916-292-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2013-09-17 916-571-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SCRM NORTH CA
2013-09-17 916-587-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C LINCOLN CA
2013-09-17 916-721-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RSVL CTHT CA
2013-09-17 916-824-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C SO PLACER CA
2013-09-13 916-571-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2013-09-09 916-472-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2013-09-09 916-472-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2013-08-30 916-710-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2013-08-23 916-347-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2013-08-16 916-737-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2013-08-14 916-394-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2013-08-05 916-862-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J SCRM MAIN CA
2013-08-01 916-999-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2013-07-30 916-385-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2013-07-23 916-431-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2013-07-23 916-472-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL MAIN CA
2013-07-10 916-542-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FOLSOM CA
2013-07-10 916-943-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2013-07-08 916-472-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RSVL MAIN CA
2013-07-03 916-741-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2013-06-27 916-246-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2013-06-27 916-900-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2013-06-27 916-900-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2013-06-21 916-540-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RSVL MAIN CA
2013-06-21 916-540-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RSVL MAIN CA
2013-06-21 916-540-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RSVL MAIN CA
2013-06-21 916-540-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RSVL MAIN CA
2013-06-21 916-540-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RSVL MAIN CA
2013-06-21 916-669-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM MAIN CA
2013-06-20 916-256-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2013-06-19 916-472-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2013-06-19 916-739-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2013-06-18 916-245-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2013-06-18 916-340-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2013-06-18 916-400-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2013-06-18 916-400-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2013-06-18 916-588-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2013-06-18 916-905-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2013-06-13 916-281-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2013-06-13 916-512-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELK GROVE CA
2013-06-11 916-389-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C SCRM MAIN CA
2013-06-11 916-462-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2013-06-11 916-895-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2013-06-04 916-512-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ELK GROVE CA
2013-06-04 916-824-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.