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
2010-09-08 916-660-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2010-09-03 916-238-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIO LINDA CA
2010-09-03 916-409-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2010-09-01 916-254-1XXX 1000–1999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2010-09-01 916-254-2XXX 2000–2999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2010-09-01 916-254-3XXX 3000–3999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2010-09-01 916-254-4XXX 4000–4999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2010-09-01 916-254-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2010-09-01 916-254-7XXX 7000–7999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2010-09-01 916-329-2XXX 2000–2999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2010-09-01 916-329-5XXX 5000–5999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2010-09-01 916-561-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2010-09-01 916-563-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2010-08-31 916-757-1XXX 1000–1999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2010-08-30 916-287-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2010-08-30 916-399-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2010-08-24 916-514-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2010-08-24 916-913-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2010-08-23 916-742-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2010-08-18 916-242-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA
2010-08-17 916-742-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2010-08-12 916-520-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2010-08-12 916-520-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2010-08-12 916-742-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2010-08-11 916-512-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2010-08-06 916-512-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELK GROVE CA
2010-08-06 916-594-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2010-08-06 916-594-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2010-08-03 916-252-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLEASATGRV CA
2010-07-12 916-790-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2010-07-07 916-496-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2010-07-07 916-742-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2010-07-07 916-742-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2010-06-29 916-896-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2010-06-23 916-259-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2010-06-23 916-604-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2010-06-22 916-243-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2010-06-22 916-655-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C PLEASATGRV CA
2010-06-21 916-234-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MICHIGNBAR CA
2010-06-21 916-409-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LINCOLN CA
2010-06-18 916-546-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2010-06-18 916-896-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2010-06-15 916-458-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2010-06-15 916-468-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2010-06-14 916-741-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SO PLACER CA
2010-06-14 916-742-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2010-06-09 916-242-3XXX 3000–3999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 RSVL CTHT CA
2010-06-09 916-287-9XXX 9000–9999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 SCRM MAIN CA
2010-06-09 916-569-8XXX 8000–8999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 SCRM NORTH CA
2010-06-09 916-824-8XXX 8000–8999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 SO PLACER 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.