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
2022-07-19 279-225-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2022-07-19 279-225-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2022-07-19 279-225-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2022-07-19 279-225-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2022-07-19 279-225-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2022-07-19 279-225-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM NORTH CA
2022-07-08 279-899-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C COURTLAND CA
2022-07-08 279-899-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C COURTLAND CA
2022-07-05 279-219-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2022-07-05 279-219-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2022-07-05 279-219-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2022-07-05 279-675-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2022-07-05 279-675-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2022-07-05 279-675-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2022-07-05 279-675-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2022-07-05 279-675-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2022-07-05 279-675-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2022-06-29 279-225-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2022-06-22 279-966-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LINCOLN CA
2022-06-20 279-782-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2022-06-17 279-221-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J SCRM MAIN CA
2022-06-09 279-966-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LINCOLN CA
2022-06-03 279-224-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2022-06-01 279-219-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FOLSOM CA
2022-05-27 279-218-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
2022-05-27 279-218-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM NORTH CA
2022-05-26 279-229-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2022-05-26 279-229-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SCRM MAIN CA
2022-05-24 279-688-8XXX 8000–8999Assigned FRACTEL, LLC 965H ISLETON CA
2022-05-24 279-966-6XXX 6000–6999Assigned FRACTEL, LLC 965H LINCOLN CA
2022-05-13 279-220-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2022-05-13 279-220-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2022-05-13 279-220-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2022-05-13 279-220-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2022-05-13 279-220-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2022-05-13 279-220-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2022-05-13 279-220-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2022-05-13 279-220-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2022-05-13 279-220-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2022-05-13 279-220-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2022-05-06 279-233-0XXX 0000–0999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2022-05-06 279-233-3XXX 3000–3999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2022-05-06 279-233-9XXX 9000–9999Assigned METROPCS, INC. 5562 SCRM NORTH CA
2022-04-18 279-219-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FOLSOM CA
2022-04-12 279-277-0XXX 0000–0999Assigned METROPCS, INC. 5562 RSVL CTHT CA
2022-04-12 279-277-1XXX 1000–1999Assigned METROPCS, INC. 5562 RSVL CTHT CA
2022-04-12 279-782-4XXX 4000–4999Assigned METROPCS, INC. 5562 FAIR OAKS CA
2022-04-12 279-782-6XXX 6000–6999Assigned METROPCS, INC. 5562 FAIR OAKS CA
2022-04-12 279-782-7XXX 7000–7999Assigned METROPCS, INC. 5562 FAIR OAKS CA
2022-04-12 279-789-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN 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.