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
2021-04-02 916-699-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2021-04-02 916-907-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2021-04-02 916-907-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2021-04-02 916-937-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-04-02 916-937-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-04-02 916-937-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-04-01 916-610-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C ISLETON CA
2021-03-30 916-860-8XXX 8000–8999Assigned TERRA NOVA TELECOM INC. 145J FAIR OAKS CA
2021-03-24 916-937-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2021-03-24 916-937-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2021-03-24 916-937-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2021-03-24 916-937-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2021-03-17 916-707-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-03-17 916-707-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-03-17 916-707-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-03-17 916-707-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-03-17 916-707-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-03-17 916-800-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-03-15 916-623-3XXX 3000–3999Assigned TWILIO INTERNATIONAL, INC. 506J ISLETON CA
2021-03-09 916-860-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2021-02-25 916-707-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-02-25 916-707-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-02-25 916-707-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-02-25 916-707-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-02-25 916-707-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-02-25 916-839-1XXX 1000–1999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RSVL MAIN CA
2021-02-25 916-839-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RSVL MAIN CA
2021-02-25 916-885-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2021-02-22 916-902-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-02-18 916-885-2XXX 2000–2999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2021-02-18 916-885-3XXX 3000–3999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2021-02-14 916-906-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2021-02-11 916-839-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2021-02-11 916-839-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2021-02-11 916-902-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2021-02-11 916-902-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2021-02-11 916-902-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2021-02-11 916-902-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2021-02-11 916-902-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2021-02-02 916-302-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C PLEASATGRV CA
2021-02-02 916-777-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C ISLETON CA
2021-02-01 916-937-0XXX 0000–0999Assigned TELNYX LLC 073H ELK GROVE CA
2021-01-28 916-775-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C COURTLAND CA
2021-01-28 916-775-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C COURTLAND CA
2021-01-28 916-775-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C COURTLAND CA
2021-01-28 916-906-6XXX 6000–6999Assigned TELNYX LLC 073H FOLSOM CA
2021-01-28 916-907-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2021-01-28 916-907-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2021-01-28 916-907-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2021-01-28 916-907-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C 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.