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
2020-11-06 657-466-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-11-06 657-466-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-11-06 657-466-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-11-06 657-466-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-11-06 657-466-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-11-06 657-466-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-11-06 657-466-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-11-06 657-472-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-11-06 657-472-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-11-06 657-472-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-11-06 657-472-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-11-06 657-472-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-11-06 657-472-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-11-06 657-472-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-11-06 657-472-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-11-06 657-472-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-11-06 657-472-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-11-06 657-944-4XXX 4000–4999Assigned FRACTEL, LLC 965H GARDEN GRV CA
2020-11-05 657-452-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C BUENA PARK CA
2020-11-05 657-452-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BUENA PARK CA
2020-11-05 657-644-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CYPRESS CA
2020-11-05 657-644-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C CYPRESS CA
2020-11-05 657-644-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C CYPRESS CA
2020-11-05 657-644-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CYPRESS CA
2020-11-05 657-688-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C PLACENTIA CA
2020-11-05 657-688-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C PLACENTIA CA
2020-11-05 657-758-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2020-11-05 657-758-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2020-10-21 657-866-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E YORBALINDA CA
2020-10-21 657-866-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E YORBALINDA CA
2020-10-15 657-733-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-733-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-733-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-733-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-733-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-733-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-733-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-895-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-895-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-895-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-895-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-895-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-895-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-895-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-895-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-15 657-895-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-10-14 657-799-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FULLERTON CA
2020-10-14 657-799-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FULLERTON CA
2020-10-14 657-799-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FULLERTON CA
2020-10-14 657-799-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FULLERTON 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.