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
2023-12-01 279-241-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2023-11-21 279-218-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2023-11-21 279-218-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2023-11-21 279-218-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2023-11-21 279-218-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2023-11-21 279-218-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2023-11-20 279-243-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J RSVL MAIN CA
2023-11-20 279-243-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J RSVL MAIN CA
2023-11-20 279-243-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J RSVL MAIN CA
2023-11-15 279-218-3XXX 3000–3999Assigned NUSO, LLC 732J SCRM NORTH CA
2023-11-15 279-218-4XXX 4000–4999Assigned NUSO, LLC 732J SCRM NORTH CA
2023-11-01 279-246-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RIO LINDA CA
2023-11-01 279-246-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RIO LINDA CA
2023-10-31 279-243-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2023-10-31 279-243-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2023-10-31 279-243-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2023-10-25 279-229-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H SCRM MAIN CA
2023-10-18 279-229-0XXX 0000–0999Assigned TELNYX LLC 073H SCRM MAIN CA
2023-10-18 279-229-1XXX 1000–1999Assigned TELNYX LLC 073H SCRM MAIN CA
2023-10-18 279-245-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FOLSOM CA
2023-10-18 279-297-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2023-10-18 279-297-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2023-10-18 279-297-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2023-10-18 279-790-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2023-10-18 279-790-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2023-10-13 279-226-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2023-10-13 279-226-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2023-10-13 279-241-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2023-10-13 279-241-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2023-10-13 279-241-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2023-10-13 279-241-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2023-10-13 279-243-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2023-10-10 279-244-1XXX 1000–1999Assigned TELNYX LLC 073H SO PLACER CA
2023-10-03 279-239-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FOLSOM CA
2023-10-03 279-241-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SCRM MAIN CA
2023-10-03 279-242-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H SCRM NORTH CA
2023-10-03 279-242-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H SCRM NORTH CA
2023-10-03 279-242-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H SCRM NORTH CA
2023-10-03 279-242-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H SCRM NORTH CA
2023-10-03 279-242-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H SCRM NORTH CA
2023-09-29 279-233-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2023-09-29 279-233-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2023-09-28 279-244-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2023-09-28 279-790-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FAIR OAKS CA
2023-09-19 279-235-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FOLSOM CA
2023-09-19 279-242-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2023-09-19 279-242-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2023-09-19 279-242-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2023-09-19 279-242-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SCRM NORTH CA
2023-09-19 279-242-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C 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.