NumberResearchThousands-blocks in 513-323
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
The ten 1,000-number thousand-blocks inside prefix 513-323 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, last 30 days — NPA 513
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
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-08-13 | 513-323-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SHANDON | OH |
| — | 513-323-1XXX | 1000–1999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | SHANDON | OH |
| 2004-02-20 | 513-323-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF OHIO, LLC - OH | 7460 | SHANDON | OH |
| 2008-05-05 | 513-323-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7836 | SHANDON | OH |
| — | 513-323-4XXX | 4000–4999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | SHANDON | OH |
| 2020-11-20 | 513-323-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF OHIO, LLC - OH | 284F | SHANDON | OH |
| 2015-01-23 | 513-323-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - OH | 001F | SHANDON | OH |
| 2010-08-03 | 513-323-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - OH | 001F | SHANDON | OH |
| 2012-09-12 | 513-323-8XXX | 8000–8999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | SHANDON | OH |
| 2026-09-16 | 513-323-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - OH | 001F | SHANDON | 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.