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
2012-05-16 916-588-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM MAIN CA
2012-05-16 916-588-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM MAIN CA
2012-05-16 916-588-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM MAIN CA
2012-05-16 916-588-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM MAIN CA
2012-05-11 916-432-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIO LINDA CA
2012-05-11 916-432-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIO LINDA CA
2012-05-11 916-500-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2012-05-07 916-295-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LINCOLN CA
2012-05-07 916-512-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2012-05-07 916-903-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2012-05-03 916-228-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2012-05-03 916-426-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2012-04-24 916-426-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2012-04-24 916-426-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2012-04-24 916-500-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2012-04-20 916-642-0XXX 0000–0999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2012-04-20 916-848-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2012-04-20 916-919-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2012-04-05 916-500-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2012-04-05 916-500-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2012-04-05 916-842-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2012-03-30 916-866-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2012-03-30 916-866-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2012-03-29 916-471-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2012-03-28 916-378-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MEADOWVIEW CA
2012-03-28 916-866-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2012-03-28 916-866-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2012-03-21 916-238-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIO LINDA CA
2012-03-21 916-666-5XXX 5000–5999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2012-03-21 916-757-0XXX 0000–0999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2012-03-21 916-844-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FAIR OAKS CA
2012-03-13 916-577-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2012-03-05 916-500-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2012-03-05 916-932-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2012-02-28 916-589-0XXX 0000–0999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2012-02-28 916-873-0XXX 0000–0999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2012-02-28 916-873-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2012-02-23 916-277-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2012-02-23 916-277-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2012-02-21 916-426-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2012-02-21 916-757-9XXX 9000–9999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2012-02-17 916-467-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2012-02-15 916-560-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL CTHT CA
2012-02-15 916-741-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2012-02-14 916-999-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J SCRM NORTH CA
2012-02-10 916-253-5XXX 5000–5999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 LINCOLN CA
2012-02-07 916-666-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RSVL MAIN CA
2012-02-07 916-672-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J SO PLACER CA
2012-02-06 916-382-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C SCRM MAIN CA
2012-02-06 916-900-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C SCRM NORTH 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.