NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

31 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-10-23 657-403-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-23 657-403-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-23 657-403-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-23 657-758-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2019-10-23 657-758-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ANAHEIM CA
2019-10-17 657-732-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-10-17 657-732-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-10-17 657-732-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-10-17 657-732-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-10-17 657-732-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-10-17 657-732-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-10-17 657-732-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-10-17 657-732-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-10-14 657-319-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FULLERTON CA
2019-10-09 657-384-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-10-09 657-398-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-09 657-398-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-09 657-398-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-09 657-398-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-09 657-398-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-09 657-398-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-09 657-398-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-09 657-398-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-09 657-398-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-09 657-398-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-09 657-977-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-10-09 657-977-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-10-09 657-977-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-10-09 657-977-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-10-09 657-977-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-10-09 657-977-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-10-09 657-977-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-10-09 657-977-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-10-09 657-977-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-10-07 657-391-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ORANGE CA
2019-10-07 657-394-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-07 657-394-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-07 657-394-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-07 657-394-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-07 657-394-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-07 657-394-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-07 657-394-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-10-02 657-397-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2019-10-02 657-397-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2019-10-02 657-397-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2019-09-30 657-660-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2019-09-23 657-391-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2019-09-23 657-391-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2019-09-23 657-391-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2019-09-23 657-391-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.