NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

31 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 657
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 30
BANDWIDTH.COM CLEC, LLC - CA 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
2023-08-23 657-683-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2023-08-23 657-683-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2023-08-23 657-683-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2023-08-23 657-684-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ORANGE CA
2023-08-17 657-554-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FULLERTON CA
2023-08-17 657-620-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CYPRESS CA
2023-08-17 657-631-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FULLERTON CA
2023-08-17 657-649-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SILVERADO CA
2023-08-11 657-680-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SANTA ANA CA
2023-08-11 657-680-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SANTA ANA CA
2023-08-10 657-671-0XXX 0000–0999Assigned COMMIO, LLC 939H BREA CA
2023-08-10 657-671-1XXX 1000–1999Assigned COMMIO, LLC 939H BREA CA
2023-08-10 657-671-2XXX 2000–2999Assigned COMMIO, LLC 939H BREA CA
2023-08-10 657-671-3XXX 3000–3999Assigned COMMIO, LLC 939H BREA CA
2023-08-10 657-671-4XXX 4000–4999Assigned COMMIO, LLC 939H BREA CA
2023-08-10 657-676-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SANTA ANA CA
2023-08-10 657-676-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SANTA ANA CA
2023-08-10 657-676-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SANTA ANA CA
2023-08-10 657-678-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2023-08-10 657-678-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2023-08-10 657-678-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2023-08-10 657-678-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2023-08-10 657-678-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2023-08-10 657-679-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 GARDEN GRV CA
2023-08-08 657-675-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-08-08 657-675-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-08-08 657-675-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-08-08 657-675-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-08-08 657-675-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-08-08 657-675-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-08-08 657-675-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-08-08 657-675-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-08-08 657-675-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-08-08 657-675-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-07-28 657-220-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-07-28 657-620-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CYPRESS CA
2023-07-28 657-620-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CYPRESS CA
2023-07-28 657-623-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-07-28 657-623-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-07-28 657-623-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-07-28 657-623-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-07-28 657-623-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-07-28 657-623-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-07-28 657-631-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FULLERTON CA
2023-07-28 657-631-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FULLERTON CA
2023-07-28 657-642-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2023-07-28 657-642-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2023-07-28 657-642-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2023-07-28 657-642-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2023-07-28 657-642-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH 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.