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
2020-11-03 279-946-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C MEADOWVIEW CA
2020-11-03 279-946-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MEADOWVIEW CA
2020-10-15 279-529-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RSVL CTHT CA
2020-10-15 279-529-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RSVL CTHT CA
2020-10-14 279-202-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2020-10-09 279-203-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2020-10-09 279-204-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2020-10-09 279-346-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2020-10-09 279-346-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2020-10-09 279-346-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2020-10-09 279-346-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2020-10-09 279-666-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2020-10-09 279-759-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RIO LINDA CA
2020-10-08 279-895-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2020-10-08 279-895-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2020-10-08 279-895-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2020-10-05 279-895-8XXX 8000–8999Assigned TWILIO INTERNATIONAL, INC. 506J SCRM MAIN CA
2020-10-02 279-346-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2020-10-02 279-346-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2020-10-02 279-346-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2020-10-02 279-346-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2020-10-02 279-346-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2020-09-23 279-786-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J SCRM MAIN CA
2020-09-20 279-529-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA
2020-09-20 279-529-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RSVL CTHT CA
2020-09-18 279-346-2XXX 2000–2999Assigned FRACTEL, LLC 965H SCRM NORTH CA
2020-09-18 279-759-6XXX 6000–6999Assigned FRACTEL, LLC 965H RIO LINDA CA
2020-09-17 279-348-6XXX 6000–6999Assigned FRACTEL, LLC 965H SCRM MAIN CA
2020-09-17 279-946-3XXX 3000–3999Assigned FRACTEL, LLC 965H MEADOWVIEW CA
2020-09-16 279-345-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2020-09-16 279-345-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2020-09-16 279-345-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2020-09-16 279-345-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2020-09-16 279-345-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM NORTH CA
2020-09-08 279-202-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FAIR OAKS CA
2020-09-08 279-202-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FAIR OAKS CA
2020-08-11 279-600-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM MAIN CA
2020-07-28 279-500-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MICHIGNBAR CA
2020-07-16 279-234-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2020-07-16 279-234-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2020-07-16 279-234-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2020-07-16 279-234-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2020-07-16 279-234-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2020-07-16 279-234-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2020-07-16 279-234-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2020-07-15 279-234-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J SCRM MAIN CA
2020-06-30 279-204-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2020-06-30 279-204-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2020-06-30 279-204-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2020-06-26 279-202-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FAIR OAKS 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.