NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

37 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 36
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
2010-11-11 657-214-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CYPRESS CA
2010-11-11 657-214-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CYPRESS CA
2010-11-08 657-204-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HUNTITNBCH CA
2010-11-08 657-205-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SANTA ANA CA
2010-11-08 657-206-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E GARDEN GRV CA
2010-11-08 657-269-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SANTA ANA CA
2010-11-08 657-444-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLACENTIA CA
2010-11-08 657-859-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SANTA ANA CA
2010-11-08 657-888-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ORANGE CA
2010-11-08 657-999-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANAHEIM CA
2010-11-08 657-999-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANAHEIM CA
2010-11-03 657-666-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WESTMINSTR CA
2010-10-29 657-777-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CYPRESS CA
2010-10-27 657-204-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HUNTITNBCH CA
2010-10-22 657-999-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C ANAHEIM CA
2010-10-21 657-207-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANAHEIM CA
2010-10-21 657-207-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANAHEIM CA
2010-10-21 657-207-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANAHEIM CA
2010-10-21 657-207-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C ANAHEIM CA
2010-10-21 657-207-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANAHEIM CA
2010-10-18 657-666-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WESTMINSTR CA
2010-10-07 657-269-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2010-10-07 657-269-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2010-10-07 657-444-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PLACENTIA CA
2010-10-05 657-207-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ANAHEIM CA
2010-10-04 657-203-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HUNTITNBCH CA
2010-10-04 657-206-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E GARDEN GRV CA
2010-10-04 657-206-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E GARDEN GRV CA
2010-10-04 657-207-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANAHEIM CA
2010-10-04 657-207-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANAHEIM CA
2010-10-04 657-444-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLACENTIA CA
2010-10-04 657-777-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CYPRESS CA
2010-10-04 657-777-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CYPRESS CA
2010-10-04 657-888-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ORANGE CA
2010-10-04 657-888-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ORANGE CA
2010-09-13 657-222-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C CYPRESS CA
2010-09-13 657-666-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C WESTMINSTR CA
2010-09-09 657-208-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ANAHEIM CA
2010-08-23 657-444-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLACENTIA CA
2010-08-17 657-333-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ORANGE CA
2010-08-17 657-333-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ORANGE CA
2010-08-17 657-777-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CYPRESS CA
2010-08-17 657-888-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ORANGE CA
2010-08-05 657-207-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ANAHEIM CA
2010-07-23 657-999-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ANAHEIM CA
2010-07-09 657-203-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HUNTITNBCH CA
2010-07-06 657-203-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2010-07-06 657-203-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2010-07-02 657-549-9XXX 9000–9999Assigned CURATEL, LLC - CA 993B ANAHEIM CA
2010-06-23 657-549-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ANAHEIM 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.