NumberResearch Membership · Data 09/22/2026

Recent thousands-block assignments

31 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/22/2026

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
2021-03-25 657-922-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-03-24 657-644-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CYPRESS CA
2021-03-24 657-644-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CYPRESS CA
2021-03-23 657-428-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2021-03-23 657-438-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2021-03-23 657-438-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2021-03-23 657-438-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2021-03-23 657-495-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-23 657-495-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-23 657-495-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-23 657-495-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-23 657-495-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-23 657-495-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-23 657-495-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-23 657-495-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-23 657-495-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-23 657-495-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-23 657-499-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2021-03-23 657-499-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2021-03-18 657-688-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PLACENTIA CA
2021-03-17 657-485-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-03-17 657-485-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-03-17 657-485-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-03-17 657-485-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-03-17 657-485-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-03-17 657-485-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-03-17 657-485-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-03-17 657-485-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-03-17 657-485-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-03-17 657-486-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2021-03-17 657-486-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2021-03-17 657-486-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2021-03-17 657-486-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2021-03-17 657-486-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2021-03-17 657-566-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FULLERTON CA
2021-03-17 657-566-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FULLERTON CA
2021-03-17 657-566-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FULLERTON CA
2021-03-17 657-566-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FULLERTON CA
2021-03-15 657-452-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BUENA PARK CA
2021-03-15 657-452-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BUENA PARK CA
2021-03-10 657-922-2XXX 2000–2999Assigned FRACTEL, LLC 965H HUNTITNBCH CA
2021-03-09 657-492-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-09 657-492-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-09 657-492-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-09 657-492-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-09 657-492-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-09 657-492-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-09 657-492-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-09 657-492-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-09 657-492-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.