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
2026-09-17 279-294-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2026-09-17 279-294-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2026-09-17 279-294-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2026-09-17 279-880-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2026-09-17 279-880-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2026-09-17 279-880-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2026-09-17 279-880-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2026-09-09 279-281-7XXX 7000–7999Assigned EXIANT COMMUNICATIONS LLC 114J MEADOWVIEW CA
2026-09-04 279-290-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J ELK GROVE CA
2026-09-02 279-263-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2026-09-02 279-263-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2026-09-01 279-290-7XXX 7000–7999Assigned EXIANT COMMUNICATIONS LLC 114J ELK GROVE CA
2026-09-01 279-688-7XXX 7000–7999Assigned EXIANT COMMUNICATIONS LLC 114J ISLETON CA
2026-08-21 279-288-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2026-08-21 279-290-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ELK GROVE CA
2026-08-20 279-294-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2026-08-20 279-294-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2026-08-20 279-294-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2026-08-11 279-880-7XXX 7000–7999Assigned EXIANT COMMUNICATIONS LLC 114J SCRM MAIN CA
2026-08-11 279-880-8XXX 8000–8999Assigned EXIANT COMMUNICATIONS LLC 114J SCRM MAIN CA
2026-08-11 279-880-9XXX 9000–9999Assigned EXIANT COMMUNICATIONS LLC 114J SCRM MAIN CA
2026-07-30 279-291-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2026-07-23 279-291-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2026-07-23 279-293-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM NORTH CA
2026-07-17 279-271-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RIO LINDA CA
2026-07-16 279-286-5XXX 5000–5999Assigned TELNYX LLC 073H RSVL MAIN CA
2026-07-09 279-295-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2026-07-09 279-295-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2026-06-30 279-288-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2026-06-30 279-288-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2026-06-30 279-288-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2026-06-30 279-438-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2026-06-30 279-880-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2026-06-24 279-267-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2026-06-24 279-267-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2026-06-18 279-281-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MEADOWVIEW CA
2026-06-18 279-288-3XXX 3000–3999Assigned HD CARRIER LLC 321J SCRM MAIN CA
2026-06-18 279-288-4XXX 4000–4999Assigned HD CARRIER LLC 321J SCRM MAIN CA
2026-06-16 279-294-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2026-06-16 279-294-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2026-06-16 279-294-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2026-06-16 279-294-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2026-06-15 279-438-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2026-06-09 279-271-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RIO LINDA CA
2026-06-04 279-438-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2026-06-04 279-438-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2026-06-04 279-438-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2026-06-04 279-438-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2026-06-04 279-438-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2026-06-04 279-438-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 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.