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
2014-11-03 916-586-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2014-11-03 916-824-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SO PLACER CA
2014-10-30 916-573-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2014-10-30 916-621-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2014-10-30 916-621-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2014-10-24 916-621-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SCRM NORTH CA
2014-10-21 916-430-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2014-10-21 916-430-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2014-10-16 916-621-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2014-10-15 916-586-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2014-10-15 916-586-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2014-10-15 916-621-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM NORTH CA
2014-10-13 916-694-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2014-10-13 916-694-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2014-10-10 916-694-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2014-10-10 916-694-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2014-10-10 916-694-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2014-10-08 916-547-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL CTHT CA
2014-10-02 916-540-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2014-10-02 916-581-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LINCOLN CA
2014-10-02 916-581-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LINCOLN CA
2014-10-02 916-586-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2014-10-02 916-621-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2014-10-02 916-621-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2014-10-02 916-694-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2014-10-02 916-694-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2014-10-02 916-694-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2014-10-01 916-547-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2014-10-01 916-827-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2014-10-01 916-827-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2014-09-30 916-540-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL MAIN CA
2014-09-30 916-846-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2014-09-29 916-298-2XXX 2000–2999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2014-09-29 916-634-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2014-09-29 916-634-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2014-09-29 916-634-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2014-09-29 916-634-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2014-09-25 916-582-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELK GROVE CA
2014-09-23 916-581-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2014-09-23 916-581-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2014-09-18 916-577-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2014-09-18 916-577-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2014-09-18 916-582-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2014-09-18 916-582-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2014-09-17 916-634-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2014-09-12 916-299-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C PLEASATGRV CA
2014-09-12 916-299-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C PLEASATGRV CA
2014-09-12 916-432-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2014-09-12 916-432-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2014-09-10 916-634-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH 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.