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
2005-10-21 916-627-4XXX 4000–4999Assigned CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 2308 ELK GROVE CA
2005-10-19 916-687-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2005-10-13 916-871-9XXX 9000–9999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2005-10-12 916-478-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2005-10-12 916-770-2XXX 2000–2999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2005-10-12 916-770-3XXX 3000–3999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2005-10-10 916-949-2XXX 2000–2999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-10-10 916-949-3XXX 3000–3999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-10-07 916-910-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL CTHT CA
2005-10-06 916-746-0XXX 0000–0999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2005-10-05 916-281-1XXX 1000–1999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-10-03 916-238-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIO LINDA CA
2005-10-03 916-273-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2005-10-03 916-273-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2005-10-03 916-273-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2005-10-03 916-273-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2005-10-03 916-307-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2005-09-30 916-273-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2005-09-30 916-273-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2005-09-30 916-273-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2005-09-28 916-949-4XXX 4000–4999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-09-28 916-949-5XXX 5000–5999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-09-26 916-753-1XXX 1000–1999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK GROVE CA
2005-09-23 916-221-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2005-09-20 916-844-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2005-09-20 916-844-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2005-09-15 916-253-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LINCOLN CA
2005-09-15 916-676-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL CTHT CA
2005-09-13 916-949-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-09-13 916-960-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2005-09-12 916-242-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RSVL CTHT CA
2005-09-12 916-724-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RSVL MAIN CA
2005-09-06 916-218-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2005-09-06 916-273-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2005-09-01 916-910-3XXX 3000–3999Assigned METROPCS, INC. 5562 RSVL CTHT CA
2005-09-01 916-910-4XXX 4000–4999Assigned METROPCS, INC. 5562 RSVL CTHT CA
2005-09-01 916-910-5XXX 5000–5999Assigned METROPCS, INC. 5562 RSVL CTHT CA
2005-09-01 916-968-5XXX 5000–5999Assigned METROPCS, INC. 5562 FAIR OAKS CA
2005-09-01 916-968-7XXX 7000–7999Assigned METROPCS, INC. 5562 FAIR OAKS CA
2005-09-01 916-968-8XXX 8000–8999Assigned METROPCS, INC. 5562 FAIR OAKS CA
2005-09-01 916-968-9XXX 9000–9999Assigned METROPCS, INC. 5562 FAIR OAKS CA
2005-08-23 916-690-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2005-08-18 916-285-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM NORTH CA
2005-08-18 916-339-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM NORTH CA
2005-08-18 916-349-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM NORTH CA
2005-08-18 916-779-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM NORTH CA
2005-08-18 916-979-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM NORTH CA
2005-08-17 916-960-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2005-08-17 916-960-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2005-07-26 916-832-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 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.