NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

15 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, last 30 days — NPA 279
T-MOBILE USA, INC. 7
EXIANT COMMUNICATIONS LLC 3
NEW CINGULAR WIRELESS PCS, LLC 2
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 1
PAETEC ITEL, LLC 1
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
2021-03-29 279-208-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-03-29 279-208-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-03-29 279-278-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FOLSOM CA
2021-03-29 279-278-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FOLSOM CA
2021-03-29 279-278-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FOLSOM CA
2021-03-24 279-206-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SO PLACER CA
2021-03-05 279-207-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C ELK GROVE CA
2021-03-05 279-207-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ELK GROVE CA
2021-03-05 279-207-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ELK GROVE CA
2021-03-05 279-207-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C ELK GROVE CA
2021-03-05 279-336-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RSVL MAIN CA
2021-03-05 279-336-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RSVL MAIN CA
2021-03-05 279-336-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RSVL MAIN CA
2021-03-05 279-336-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RSVL MAIN CA
2021-03-02 279-336-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2021-03-02 279-336-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2021-03-02 279-336-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2021-03-02 279-336-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2021-03-01 279-667-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-03-01 279-667-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-03-01 279-667-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-03-01 279-667-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-03-01 279-667-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-02-25 279-732-5XXX 5000–5999Assigned FRACTEL, LLC 965H FOLSOM CA
2021-02-22 279-208-0XXX 0000–0999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2021-02-22 279-208-1XXX 1000–1999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2021-02-22 279-208-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2021-02-22 279-400-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LINCOLN CA
2021-02-18 279-279-0XXX 0000–0999Assigned METROPCS, INC. 5562 RSVL CTHT CA
2021-02-16 279-667-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2021-02-16 279-667-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2021-02-16 279-667-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2021-02-16 279-667-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2021-02-14 279-799-0XXX 0000–0999Assigned TELNYX LLC 073H WALNUT GRV CA
2021-02-04 279-758-6XXX 6000–6999Assigned FRACTEL, LLC 965H SCRM NORTH CA
2021-02-04 279-946-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C MEADOWVIEW CA
2021-02-04 279-946-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MEADOWVIEW CA
2021-02-04 279-946-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MEADOWVIEW CA
2021-02-04 279-946-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C MEADOWVIEW CA
2021-02-02 279-799-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C WALNUT GRV CA
2021-02-02 279-799-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C WALNUT GRV CA
2021-02-02 279-799-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C WALNUT GRV CA
2021-01-28 279-217-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2021-01-26 279-206-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2021-01-26 279-206-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2021-01-26 279-206-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2021-01-22 279-278-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2021-01-22 279-278-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2021-01-22 279-278-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2021-01-22 279-278-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FOLSOM 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.