NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 513-456

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 513-456 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 513 blocks

Most active assignees, all time — NPA 513
BANDWIDTH.COM CLEC, LLC - OH 3
NEW CINGULAR WIRELESS PCS, LLC - IL 2
LEVEL 3 COMMUNICATIONS, LLC - OH 2
TWC IP ENABLED SERVICES, LLC 1
PAETEC ITEL, 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
2013-01-07 513-456-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWTONSVL OH
2010-02-01 513-456-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F NEWTONSVL OH
2011-02-11 513-456-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F NEWTONSVL OH
2013-06-13 513-456-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWTONSVL OH
2004-09-28 513-456-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWTONSVL OH
2005-11-16 513-456-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWTONSVL OH
2006-10-04 513-456-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K NEWTONSVL OH
2011-03-04 513-456-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F NEWTONSVL OH
2012-09-12 513-456-8XXX 8000–8999Assigned CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS 600F NEWTONSVL OH
— 513-456-9XXX 9000–9999Reserved PAETEC ITEL, LLC 829J NEWTONSVL OH

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.