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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2006-01-05 916-317-8XXX 8000–8999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-12-29 916-770-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2005-12-27 916-375-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2005-12-16 916-342-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FAIR OAKS CA
2005-12-15 916-753-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2005-12-14 916-378-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MEADOWVIEW CA
2005-12-14 916-527-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WALNUT GRV CA
2005-12-14 916-770-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2005-12-14 916-910-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL CTHT CA
2005-12-06 916-307-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2005-12-06 916-307-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2005-12-06 916-307-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2005-12-05 916-317-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2005-12-05 916-949-0XXX 0000–0999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-12-05 916-949-1XXX 1000–1999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-11-30 916-960-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7174 RSVL MAIN CA
2005-11-23 916-265-8XXX 8000–8999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2005-11-22 916-473-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2005-11-22 916-753-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2005-11-22 916-990-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2005-11-22 916-990-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2005-11-18 916-307-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2005-11-16 916-200-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FAIR OAKS CA
2005-11-16 916-200-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FAIR OAKS CA
2005-11-16 916-200-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FAIR OAKS CA
2005-11-16 916-235-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FOLSOM CA
2005-11-16 916-235-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FOLSOM CA
2005-11-16 916-235-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FOLSOM CA
2005-11-16 916-242-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL CTHT CA
2005-11-16 916-242-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL CTHT CA
2005-11-16 916-242-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL CTHT CA
2005-11-16 916-735-9XXX 9000–9999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 RSVL CTHT CA
2005-11-09 916-251-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SO PLACER CA
2005-11-04 916-770-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2005-11-04 916-770-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2005-11-02 916-241-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2005-11-01 916-384-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2005-11-01 916-384-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2005-11-01 916-384-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2005-10-31 916-672-3XXX 3000–3999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 SO PLACER CA
2005-10-31 916-749-7XXX 7000–7999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 RSVL MAIN CA
2005-10-28 916-471-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2005-10-28 916-471-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2005-10-28 916-471-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2005-10-27 916-365-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2005-10-27 916-365-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2005-10-27 916-626-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2005-10-27 916-626-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2005-10-24 916-871-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL MAIN CA
2005-10-21 916-627-3XXX 3000–3999Assigned CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 2308 ELK GROVE 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.