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
2007-05-23 916-889-3XXX 3000–3999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-05-23 916-889-4XXX 4000–4999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-05-23 916-889-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2007-05-08 916-588-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2007-05-07 916-293-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2007-05-07 916-647-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C ELK GROVE CA
2007-04-26 916-253-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LINCOLN CA
2007-04-26 916-333-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2007-04-20 916-380-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 RSVL MAIN CA
2007-04-20 916-380-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 RSVL MAIN CA
2007-04-20 916-745-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 RSVL CTHT CA
2007-04-03 916-644-4XXX 4000–4999Assigned AT&T - LOCAL 7421 LINCOLN CA
2007-04-02 916-380-0XXX 0000–0999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2007-04-02 916-380-1XXX 1000–1999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2007-03-30 916-474-2XXX 2000–2999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2007-03-30 916-474-3XXX 3000–3999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2007-03-30 916-474-6XXX 6000–6999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2007-03-30 916-474-7XXX 7000–7999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2007-03-29 916-753-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2007-03-20 916-467-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2007-03-19 916-468-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2007-03-19 916-468-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2007-03-12 916-751-5XXX 5000–5999Assigned IP HORIZON LLC 515J RSVL MAIN CA
2007-03-12 916-897-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2007-03-12 916-897-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2007-03-08 916-408-9XXX 9000–9999Assigned PACIFIC BELL 9740 LINCOLN CA
2007-02-23 916-450-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2007-02-23 916-749-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2007-02-16 916-751-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RSVL MAIN CA
2007-02-16 916-751-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RSVL MAIN CA
2007-02-16 916-751-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RSVL MAIN CA
2007-02-15 916-379-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2007-02-15 916-379-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2007-02-13 916-860-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2007-02-13 916-903-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2007-02-07 916-333-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2007-02-06 916-872-6XXX 6000–6999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2007-01-26 916-380-8XXX 8000–8999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2007-01-26 916-380-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2007-01-23 916-333-5XXX 5000–5999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 SCRM NORTH CA
2007-01-22 916-335-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2007-01-18 916-517-6XXX 6000–6999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2007-01-17 916-333-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2007-01-16 916-517-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2007-01-16 916-517-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2007-01-16 916-517-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RSVL MAIN CA
2007-01-16 916-642-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2007-01-16 916-880-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2007-01-11 916-864-2XXX 2000–2999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 FAIR OAKS CA
2007-01-09 916-897-2XXX 2000–2999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 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.