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
2020-04-06 279-204-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2020-04-06 279-204-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2020-04-06 279-204-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2020-04-06 279-900-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2020-04-06 279-900-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2020-04-02 279-203-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2020-03-26 279-900-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2020-03-25 279-203-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2020-03-25 279-203-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2020-03-25 279-203-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2020-03-25 279-465-8XXX 8000–8999Assigned FRACTEL, LLC 965H FOLSOM CA
2020-03-03 279-203-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM NORTH CA
2020-02-10 279-529-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RSVL CTHT CA
2020-02-10 279-900-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RSVL MAIN CA
2020-02-04 279-500-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C MICHIGNBAR CA
2020-01-15 279-900-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2020-01-14 279-600-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2020-01-14 279-600-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2020-01-14 279-600-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2020-01-14 279-600-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2020-01-14 279-600-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2020-01-13 279-202-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2020-01-13 279-202-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2020-01-10 279-203-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2020-01-10 279-203-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2020-01-10 279-203-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2020-01-10 279-203-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2020-01-09 279-600-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2020-01-08 279-202-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2019-12-26 279-600-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2019-12-18 279-666-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM NORTH CA
2019-12-02 279-400-0XXX 0000–0999Assigned FRACTEL, LLC 965H LINCOLN CA
2019-12-02 279-400-4XXX 4000–4999Assigned FRACTEL, LLC 965H LINCOLN CA
2019-12-02 279-400-5XXX 5000–5999Assigned FRACTEL, LLC 965H LINCOLN CA
2019-12-02 279-500-0XXX 0000–0999Assigned FRACTEL, LLC 965H MICHIGNBAR CA
2019-12-02 279-500-5XXX 5000–5999Assigned FRACTEL, LLC 965H MICHIGNBAR CA
2019-12-02 279-500-7XXX 7000–7999Assigned FRACTEL, LLC 965H MICHIGNBAR CA
2019-12-02 279-529-3XXX 3000–3999Assigned FRACTEL, LLC 965H RSVL CTHT CA
2019-12-02 279-529-9XXX 9000–9999Assigned FRACTEL, LLC 965H RSVL CTHT CA
2019-12-02 279-600-0XXX 0000–0999Assigned FRACTEL, LLC 965H SCRM MAIN CA
2019-12-02 279-600-6XXX 6000–6999Assigned FRACTEL, LLC 965H SCRM MAIN CA
2019-10-14 279-202-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FAIR OAKS CA
2019-10-03 279-666-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM NORTH CA
2019-09-24 279-666-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM NORTH CA
2019-09-23 279-800-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2019-08-29 279-999-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SO PLACER CA
2019-08-29 279-999-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SO PLACER CA
2019-08-09 279-201-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C FAIR OAKS CA
2019-08-09 279-800-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ELK GROVE CA
2019-08-09 279-800-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ELK GROVE 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.