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
2013-11-26 916-597-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2013-11-22 916-347-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FAIR OAKS CA
2013-11-22 916-542-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2013-11-22 916-542-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2013-11-22 916-587-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2013-11-22 916-672-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SO PLACER CA
2013-11-22 916-672-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SO PLACER CA
2013-11-20 916-389-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2013-11-20 916-389-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2013-11-20 916-917-1XXX 1000–1999Assigned WIDE VOICE, LLC - CA 252F SCRM MAIN CA
2013-11-13 916-389-7XXX 7000–7999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 SCRM MAIN CA
2013-11-11 916-347-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2013-11-08 916-477-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WALNUT GRV CA
2013-11-07 916-467-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2013-11-05 916-542-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2013-11-04 916-292-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2013-11-04 916-292-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2013-11-01 916-352-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MICHIGNBAR CA
2013-11-01 916-352-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C MICHIGNBAR CA
2013-11-01 916-587-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LINCOLN CA
2013-11-01 916-587-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C LINCOLN CA
2013-10-31 916-571-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2013-10-31 916-571-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2013-10-31 916-655-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C PLEASATGRV CA
2013-10-31 916-655-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C PLEASATGRV CA
2013-10-23 916-544-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2013-10-22 916-297-5XXX 5000–5999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2013-10-22 916-729-9XXX 9000–9999Assigned METROPCS, INC. 5562 RSVL CTHT CA
2013-10-18 916-661-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2013-10-18 916-735-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA
2013-10-18 916-895-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2013-10-18 916-895-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2013-10-18 916-895-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2013-10-15 916-472-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 RSVL MAIN CA
2013-10-09 916-540-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2013-10-07 916-661-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM MAIN CA
2013-10-04 916-347-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
2013-10-04 916-379-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2013-10-04 916-450-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2013-10-04 916-450-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2013-10-04 916-710-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2013-09-23 916-846-7XXX 7000–7999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 RSVL MAIN CA
2013-09-23 916-887-0XXX 0000–0999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-1XXX 1000–1999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-2XXX 2000–2999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-3XXX 3000–3999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-4XXX 4000–4999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-5XXX 5000–5999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-6XXX 6000–6999Assigned PACIFIC BELL 9740 SCRM MAIN CA
2013-09-23 916-887-7XXX 7000–7999Assigned PACIFIC BELL 9740 SCRM MAIN 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.