NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

15 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2021-06-26 279-732-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H FOLSOM CA
2021-06-26 279-759-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H RIO LINDA CA
2021-06-22 279-587-0XXX 0000–0999Assigned TELNYX LLC 073H PLEASATGRV CA
2021-06-17 279-587-8XXX 8000–8999Assigned FRACTEL, LLC 965H PLEASATGRV CA
2021-06-17 279-732-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2021-06-16 279-212-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C MICHIGNBAR CA
2021-06-16 279-217-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2021-06-16 279-217-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2021-06-16 279-217-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2021-06-16 279-217-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2021-06-16 279-279-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C RSVL CTHT CA
2021-06-16 279-279-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RSVL CTHT CA
2021-06-16 279-279-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RSVL CTHT CA
2021-06-16 279-279-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RSVL CTHT CA
2021-06-16 279-699-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2021-06-16 279-699-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2021-06-16 279-699-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2021-06-16 279-699-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2021-06-16 279-799-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C WALNUT GRV CA
2021-06-16 279-946-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C MEADOWVIEW CA
2021-06-16 279-946-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C MEADOWVIEW CA
2021-06-15 279-732-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2021-06-03 279-247-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2021-05-24 279-247-0XXX 0000–0999Assigned COMMIO, LLC 939H SCRM NORTH CA
2021-05-24 279-247-1XXX 1000–1999Assigned COMMIO, LLC 939H SCRM NORTH CA
2021-05-24 279-247-2XXX 2000–2999Assigned COMMIO, LLC 939H SCRM NORTH CA
2021-05-24 279-247-3XXX 3000–3999Assigned COMMIO, LLC 939H SCRM NORTH CA
2021-05-19 279-247-7XXX 7000–7999Assigned FRACTEL, LLC 965H SCRM NORTH CA
2021-05-18 279-386-3XXX 3000–3999Assigned FRACTEL, LLC 965H SCRM MAIN CA
2021-05-14 279-234-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-05-13 279-212-0XXX 0000–0999Assigned TELNYX LLC 073H MICHIGNBAR CA
2021-05-05 279-208-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM MAIN CA
2021-04-28 279-758-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2021-04-21 279-208-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2021-04-19 279-699-9XXX 9000–9999Assigned FRACTEL, LLC 965H RIO LINDA CA
2021-04-15 279-212-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MICHIGNBAR CA
2021-04-12 279-758-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-04-12 279-758-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-04-12 279-758-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-04-12 279-758-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-04-12 279-758-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-04-12 279-758-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-04-09 279-206-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SO PLACER CA
2021-04-09 279-217-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SO PLACER CA
2021-04-09 279-217-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SO PLACER CA
2021-03-30 279-278-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2021-03-30 279-279-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C RSVL CTHT CA
2021-03-29 279-208-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-03-29 279-208-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-03-29 279-208-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.