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
2006-03-22 916-317-5XXX 5000–5999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-03-22 916-317-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-03-21 916-842-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2006-03-20 916-288-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2006-03-20 916-288-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2006-03-13 916-903-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2006-03-09 916-253-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LINCOLN CA
2006-03-09 916-844-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C FAIR OAKS CA
2006-03-03 916-629-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MEADOWVIEW CA
2006-02-28 916-378-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MEADOWVIEW CA
2006-02-14 916-458-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2006-02-13 916-583-0XXX 0000–0999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-02-13 916-583-1XXX 1000–1999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-02-13 916-583-2XXX 2000–2999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-02-13 916-583-3XXX 3000–3999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-02-13 916-583-4XXX 4000–4999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-02-07 916-265-3XXX 3000–3999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 SCRM NORTH CA
2006-02-07 916-440-6XXX 6000–6999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 SCRM MAIN CA
2006-02-07 916-644-1XXX 1000–1999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 LINCOLN CA
2006-02-07 916-647-6XXX 6000–6999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 ELK GROVE CA
2006-02-01 916-878-2XXX 2000–2999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2006-02-01 916-878-3XXX 3000–3999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2006-02-01 916-878-4XXX 4000–4999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2006-01-27 916-408-6XXX 6000–6999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 LINCOLN CA
2006-01-26 916-467-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C FOLSOM CA
2006-01-26 916-960-7XXX 7000–7999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2006-01-24 916-293-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2006-01-24 916-293-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2006-01-24 916-627-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2006-01-20 916-753-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2006-01-20 916-753-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2006-01-20 916-753-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2006-01-19 916-432-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RIO LINDA CA
2006-01-19 916-432-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RIO LINDA CA
2006-01-19 916-627-7XXX 7000–7999Assigned CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 2308 ELK GROVE CA
2006-01-12 916-281-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-01-12 916-281-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-01-12 916-281-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-01-12 916-281-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-01-12 916-281-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-01-12 916-340-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-01-12 916-340-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-01-12 916-494-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-01-12 916-494-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-01-12 916-494-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-01-12 916-494-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-01-12 916-494-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2006-01-11 916-267-0XXX 0000–0999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-01-10 916-770-8XXX 8000–8999Assigned CONSOLIDATED COMMUNICATIONS OF CALIFORNIA COMPANY 2334 RSVL MAIN CA
2006-01-05 916-317-7XXX 7000–7999Assigned METROPCS, INC. 5562 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.