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
2021-08-25 279-499-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2021-07-30 279-786-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-07-30 279-786-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-07-30 279-786-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-07-30 279-786-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-07-30 279-786-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-07-30 279-786-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-07-28 279-209-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-07-28 279-209-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-07-28 279-209-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-07-28 279-209-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-07-21 279-206-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2021-07-21 279-206-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2021-07-20 279-599-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2021-07-20 279-599-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2021-07-20 279-599-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2021-07-20 279-599-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2021-07-20 279-599-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2021-07-20 279-599-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2021-07-20 279-599-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2021-07-20 279-599-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2021-07-20 279-599-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SCRM MAIN CA
2021-07-16 279-766-3XXX 3000–3999Assigned FRACTEL, LLC 965H MEADOWVIEW CA
2021-07-16 279-766-6XXX 6000–6999Assigned FRACTEL, LLC 965H MEADOWVIEW CA
2021-07-09 279-212-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C MICHIGNBAR CA
2021-07-09 279-217-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2021-07-09 279-217-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SO PLACER CA
2021-07-09 279-247-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2021-07-09 279-247-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2021-07-09 279-386-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2021-07-09 279-587-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C PLEASATGRV CA
2021-07-09 279-699-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2021-07-09 279-699-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2021-07-09 279-699-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2021-07-09 279-699-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RIO LINDA CA
2021-07-09 279-758-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2021-07-07 279-322-2XXX 2000–2999Assigned FRACTEL, LLC 965H WALNUT GRV CA
2021-07-07 279-499-9XXX 9000–9999Assigned FRACTEL, LLC 965H SCRM NORTH CA
2021-07-07 279-599-9XXX 9000–9999Assigned FRACTEL, LLC 965H SCRM MAIN CA
2021-07-07 279-899-9XXX 9000–9999Assigned FRACTEL, LLC 965H COURTLAND CA
2021-06-30 279-386-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-06-30 279-386-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-06-30 279-386-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-06-30 279-386-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-06-30 279-386-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-06-30 279-386-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-06-30 279-386-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-06-30 279-386-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM MAIN CA
2021-06-26 279-212-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H MICHIGNBAR CA
2021-06-26 279-247-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H 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.