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
2011-08-19 916-403-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2011-08-19 916-668-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2011-08-19 916-668-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2011-08-19 916-850-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2011-08-05 916-358-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2011-08-05 916-477-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WALNUT GRV CA
2011-08-05 916-850-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FOLSOM CA
2011-08-04 916-468-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RIO LINDA CA
2011-07-21 916-905-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2011-07-20 916-644-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2011-07-19 916-304-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MICHIGNBAR CA
2011-07-19 916-304-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MICHIGNBAR CA
2011-07-11 916-666-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2011-07-06 916-914-5XXX 5000–5999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2011-07-06 916-914-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2011-06-30 916-304-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MICHIGNBAR CA
2011-06-30 916-304-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MICHIGNBAR CA
2011-06-27 916-945-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2011-06-27 916-945-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2011-06-23 916-382-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2011-06-23 916-382-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2011-06-22 916-382-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2011-06-16 916-744-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 COURTLAND CA
2011-06-07 916-999-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM NORTH CA
2011-05-31 916-415-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SO PLACER CA
2011-05-25 916-666-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2011-05-25 916-666-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2011-05-25 916-666-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2011-05-25 916-671-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2011-05-20 916-932-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2011-05-17 916-243-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C RIO LINDA CA
2011-05-17 916-850-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FOLSOM CA
2011-05-13 916-605-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FOLSOM CA
2011-05-09 916-663-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2011-05-06 916-850-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2011-05-04 916-229-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-05-04 916-229-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-05-04 916-229-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-05-04 916-382-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2011-05-04 916-527-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WALNUT GRV CA
2011-05-04 916-900-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2011-05-03 916-234-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MICHIGNBAR CA
2011-05-03 916-235-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2011-05-03 916-243-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIO LINDA CA
2011-05-03 916-243-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIO LINDA CA
2011-05-03 916-343-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2011-05-03 916-365-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2011-05-03 916-546-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FAIR OAKS CA
2011-05-03 916-790-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2011-05-03 916-860-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FAIR OAKS 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.