NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 570-520

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026

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

The ten 1,000-number thousand-blocks inside prefix 570-520 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 570 blocks

Most active assignees, all time — NPA 570
NEW CINGULAR WIRELESS PCS, LLC - DC 2
D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 2
BANDWIDTH.COM CLEC, LLC - PA 2
PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 1
IDT AMERICA, CORP. - PA 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
2016-06-23 570-520-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F BERWICK PA
2022-01-20 570-520-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BERWICK PA
2016-07-20 570-520-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F BERWICK PA
2018-02-16 570-520-3XXX 3000–3999Assigned PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E BERWICK PA
2007-09-14 570-520-4XXX 4000–4999Assigned IDT AMERICA, CORP. - PA 213C BERWICK PA
2014-10-16 570-520-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BERWICK PA
2015-12-23 570-520-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BERWICK PA
2015-09-08 570-520-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BERWICK PA
2015-09-14 570-520-8XXX 8000–8999Assigned D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 BERWICK PA
2018-01-31 570-520-9XXX 9000–9999Assigned D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 BERWICK PA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.