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
2006-08-04 916-749-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL MAIN CA
2006-08-04 916-749-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2006-08-04 916-749-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2006-08-04 916-878-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL MAIN CA
2006-08-01 916-932-7XXX 7000–7999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7174 FOLSOM CA
2006-07-26 916-384-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2006-07-26 916-640-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2006-07-24 916-893-8XXX 8000–8999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-07-24 916-893-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-07-21 916-753-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2006-07-21 916-753-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2006-07-19 916-238-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RIO LINDA CA
2006-07-19 916-241-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FAIR OAKS CA
2006-07-19 916-258-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LINCOLN CA
2006-07-19 916-283-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
2006-07-19 916-285-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2006-07-19 916-293-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FOLSOM CA
2006-07-19 916-293-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FOLSOM CA
2006-07-19 916-415-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SO PLACER CA
2006-07-19 916-515-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2006-07-19 916-515-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2006-07-19 916-560-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA
2006-07-19 916-560-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA
2006-07-19 916-568-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2006-07-19 916-749-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL MAIN CA
2006-07-19 916-749-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL MAIN CA
2006-07-13 916-844-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2006-06-29 916-706-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2006-06-29 916-706-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2006-06-29 916-706-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2006-06-29 916-706-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2006-06-27 916-283-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM NORTH CA
2006-06-13 916-760-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2006-06-09 916-878-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2006-06-09 916-878-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2006-05-26 916-317-1XXX 1000–1999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-05-26 916-317-2XXX 2000–2999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-05-26 916-317-3XXX 3000–3999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-05-26 916-317-4XXX 4000–4999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-05-26 916-878-7XXX 7000–7999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2006-05-26 916-878-8XXX 8000–8999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2006-05-18 916-642-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-05-18 916-642-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-05-18 916-642-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-05-18 916-642-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-04-18 916-329-1XXX 1000–1999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2006-04-17 916-471-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-04-17 916-471-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-04-10 916-878-9XXX 9000–9999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2006-03-28 916-341-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 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.