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
2021-12-15 279-944-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H SCRM NORTH CA
2021-12-15 279-944-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H SCRM NORTH CA
2021-12-15 279-944-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H SCRM NORTH CA
2021-12-15 279-944-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H SCRM NORTH CA
2021-12-13 279-977-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2021-12-13 279-977-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2021-12-10 279-216-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-12-10 279-216-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-12-10 279-216-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-12-10 279-216-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-12-10 279-216-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-12-10 279-216-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-12-10 279-216-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-12-10 279-944-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-12-10 279-944-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-12-10 279-944-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-12-10 279-944-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-12-10 279-944-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-12-09 279-277-7XXX 7000–7999Assigned FRACTEL, LLC 965H RSVL CTHT CA
2021-12-09 279-901-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ELK GROVE CA
2021-12-01 279-209-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-12-01 279-209-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-12-01 279-209-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-12-01 279-901-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-12-01 279-901-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-12-01 279-901-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-11-30 279-499-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2021-11-29 279-215-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2021-11-22 279-213-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2021-11-22 279-213-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2021-11-22 279-215-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2021-11-22 279-215-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2021-11-22 279-215-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2021-11-21 279-213-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LINCOLN CA
2021-11-17 279-901-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H ELK GROVE CA
2021-11-16 279-732-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FOLSOM CA
2021-11-05 279-214-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2021-11-05 279-214-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2021-11-05 279-214-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2021-11-05 279-214-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2021-11-05 279-587-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C PLEASATGRV CA
2021-11-05 279-587-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C PLEASATGRV CA
2021-11-02 279-499-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM NORTH CA
2021-11-02 279-699-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIO LINDA CA
2021-10-27 279-213-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2021-10-27 279-213-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2021-10-27 279-214-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FAIR OAKS CA
2021-10-27 279-499-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM NORTH CA
2021-10-27 279-759-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RIO LINDA CA
2021-10-26 279-214-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H 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.