NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 513-327

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 513-327 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
ONVOY, LLC - OH 2
LEVEL 3 COMMUNICATIONS, LLC - OH 2
TON80 COMMUNICATIONS, LLC 1
TERRA NOVA TELECOM INC. 1
PEERLESS NETWORK OF OHIO, LLC - OH 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
— 513-327-0XXX 0000–0999Available WILLIAMSBG OH
2024-08-13 513-327-1XXX 1000–1999Assigned TERRA NOVA TELECOM INC. 145J WILLIAMSBG OH
2005-12-27 513-327-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WILLIAMSBG OH
2022-01-24 513-327-3XXX 3000–3999Assigned ONVOY, LLC - OH 464C WILLIAMSBG OH
2021-09-02 513-327-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J WILLIAMSBG OH
2022-08-30 513-327-5XXX 5000–5999Assigned ONVOY, LLC - OH 464C WILLIAMSBG OH
2022-10-26 513-327-6XXX 6000–6999Assigned COMMIO, LLC 939H WILLIAMSBG OH
2004-10-18 513-327-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WILLIAMSBG OH
2009-01-12 513-327-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - OH 001F WILLIAMSBG OH
2022-10-25 513-327-9XXX 9000–9999Assigned PEERLESS NETWORK OF OHIO, LLC - OH 284F WILLIAMSBG 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.