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
2005-02-22 916-459-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
2005-02-17 916-239-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2005-02-16 916-226-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELK GROVE CA
2005-02-16 916-458-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FOLSOM CA
2005-02-16 916-475-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-02-16 916-475-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2005-02-10 916-370-6XXX 6000–6999Assigned METROPCS, INC. 5562 FOLSOM CA
2005-02-10 916-370-7XXX 7000–7999Assigned METROPCS, INC. 5562 FOLSOM CA
2005-02-10 916-370-8XXX 8000–8999Assigned METROPCS, INC. 5562 FOLSOM CA
2005-02-10 916-370-9XXX 9000–9999Assigned METROPCS, INC. 5562 FOLSOM CA
2005-02-10 916-868-7XXX 7000–7999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-02-10 916-868-8XXX 8000–8999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-02-10 916-868-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2005-02-02 916-475-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2005-02-01 916-248-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2005-02-01 916-405-9XXX 9000–9999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 ELK GROVE CA
2005-02-01 916-724-3XXX 3000–3999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 RSVL MAIN CA
2005-02-01 916-910-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL CTHT CA
2005-02-01 916-949-7XXX 7000–7999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SCRM MAIN CA
2005-01-31 916-844-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2005-01-25 916-226-2XXX 2000–2999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 ELK GROVE CA
2005-01-21 916-794-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MICHIGNBAR CA
2005-01-17 916-248-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2005-01-14 916-248-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2005-01-14 916-248-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2005-01-04 916-367-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2005-01-04 916-468-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIO LINDA CA
2004-12-28 916-239-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2004-12-20 916-367-3XXX 3000–3999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2004-12-20 916-475-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2004-12-15 916-436-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
2004-12-15 916-436-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
2004-12-15 916-436-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
2004-12-14 916-226-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELK GROVE CA
2004-12-14 916-226-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELK GROVE CA
2004-12-14 916-226-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELK GROVE CA
2004-12-13 916-218-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2004-12-10 916-248-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2004-12-06 916-420-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2004-12-06 916-420-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2004-12-06 916-429-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2004-11-24 916-580-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RSVL MAIN CA
2004-11-24 916-735-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RSVL CTHT CA
2004-11-23 916-644-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LINCOLN CA
2004-11-19 916-459-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
2004-11-11 916-236-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ELK GROVE CA
2004-11-08 916-626-6XXX 6000–6999Assigned FIDIUM ENTERPRISE SERVICES, LLC 3964 SO PLACER CA
2004-10-13 916-458-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FOLSOM CA
2004-10-12 916-529-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2004-10-12 916-671-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 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.