NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 657-859

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 657-859 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 657 blocks

Most active assignees, all time — NPA 657
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 2
PAETEC ITEL, LLC 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2
BANDWIDTH.COM CLEC, LLC - CA 2
METROPCS NETWORKS, LLC 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
2008-10-08 657-859-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D SANTA ANA CA
2009-12-03 657-859-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SANTA ANA CA
2009-11-18 657-859-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SANTA ANA CA
2008-09-24 657-859-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J SANTA ANA CA
2009-08-26 657-859-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J SANTA ANA CA
2009-11-24 657-859-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SANTA ANA CA
2008-06-12 657-859-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SANTA ANA CA
2024-12-19 657-859-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2024-12-19 657-859-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2010-11-08 657-859-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SANTA ANA 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.