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
2014-03-12 916-342-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FAIR OAKS CA
2014-03-12 916-347-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FAIR OAKS CA
2014-03-12 916-571-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2014-03-12 916-846-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2014-03-12 916-846-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2014-03-12 916-846-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2014-03-12 916-904-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FAIR OAKS CA
2014-03-11 916-252-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLEASATGRV CA
2014-03-11 916-347-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FAIR OAKS CA
2014-03-11 916-385-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2014-03-11 916-385-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2014-03-11 916-581-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LINCOLN CA
2014-03-11 916-597-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FOLSOM CA
2014-03-05 916-597-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2014-03-05 916-597-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2014-03-04 916-581-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2014-03-03 916-330-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2014-03-03 916-330-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2014-03-03 916-330-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2014-02-28 916-312-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MICHIGNBAR CA
2014-02-28 916-312-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MICHIGNBAR CA
2014-02-28 916-587-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2014-02-27 916-472-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2014-02-21 916-597-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FOLSOM CA
2014-02-12 916-500-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 FOLSOM CA
2014-02-11 916-385-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELK GROVE CA
2014-02-11 916-917-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SCRM MAIN CA
2014-01-29 916-414-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2014-01-27 916-347-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2014-01-27 916-661-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2014-01-24 916-585-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 ELK GROVE CA
2014-01-23 916-385-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2014-01-22 916-597-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FOLSOM CA
2014-01-21 916-398-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WALNUT GRV CA
2014-01-14 916-571-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2014-01-10 916-597-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2014-01-10 916-597-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2014-01-07 916-472-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2014-01-06 916-553-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2014-01-06 916-571-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2014-01-06 916-764-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2013-12-20 916-330-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2013-12-11 916-571-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2013-12-11 916-589-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2013-12-11 916-661-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2013-12-06 916-385-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2013-12-05 916-571-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
2013-12-05 916-597-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2013-12-05 916-597-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2013-12-03 916-662-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN 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.