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
2026-05-21 279-291-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2026-05-21 279-293-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2026-05-20 279-285-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2026-05-20 279-285-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2026-05-20 279-285-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2026-05-20 279-285-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2026-05-20 279-286-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2026-05-20 279-286-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2026-05-20 279-286-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2026-05-20 279-438-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2026-05-20 279-842-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2026-05-20 279-880-1XXX 1000–1999Assigned 8X8, INC. 193E SCRM MAIN CA
2026-05-13 279-288-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2026-04-23 279-271-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RIO LINDA CA
2026-04-20 279-269-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2026-04-20 279-292-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2026-04-20 279-292-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2026-04-20 279-292-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2026-04-20 279-292-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2026-04-20 279-292-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2026-04-20 279-292-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2026-04-20 279-292-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2026-04-20 279-292-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2026-04-20 279-292-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2026-04-20 279-292-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2026-04-17 279-271-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RIO LINDA CA
2026-04-07 279-290-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 ELK GROVE CA
2026-04-02 279-288-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2026-04-02 279-288-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SCRM MAIN CA
2026-03-30 279-438-4XXX 4000–4999Assigned EXIANT COMMUNICATIONS LLC 114J SCRM MAIN CA
2026-03-18 279-263-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2026-03-18 279-263-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2026-03-02 279-284-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2026-02-18 279-288-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2026-02-09 279-279-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RSVL CTHT CA
2026-01-30 279-284-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2026-01-30 279-284-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2026-01-30 279-290-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2026-01-30 279-290-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2025-12-05 279-287-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J LINCOLN CA
2025-12-04 279-256-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2025-12-04 279-267-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2025-12-04 279-284-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2025-11-12 279-291-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FAIR OAKS CA
2025-10-30 279-290-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2025-10-30 279-290-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2025-10-30 279-290-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2025-10-17 279-261-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2025-10-17 279-261-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2025-10-17 279-261-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH 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.