NumberResearchThousands-blocks in 724-572
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 724-572 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 724 blocks
Most active assignees, all time — NPA 724
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 |
|---|---|---|---|---|---|---|---|
| 2025-11-04 | 724-572-0XXX | 0000–0999 | Assigned | ONVOY, LLC - PA | 547E | LATROBE | PA |
| — | 724-572-1XXX | 1000–1999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | LATROBE | PA |
| 2019-03-07 | 724-572-2XXX | 2000–2999 | Assigned | CORE COMMUNICATIONS, INC. - PA | 3806 | LATROBE | PA |
| 2009-07-06 | 724-572-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LATROBE | PA |
| 2019-03-07 | 724-572-4XXX | 4000–4999 | Assigned | CORE COMMUNICATIONS, INC. - PA | 3806 | LATROBE | PA |
| 2007-05-02 | 724-572-5XXX | 5000–5999 | Assigned | ARMSTRONG TELECOMMUNICATIONS, INC. - PA | 422C | LATROBE | PA |
| 2010-05-26 | 724-572-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - PA | 002F | LATROBE | PA |
| 2012-11-12 | 724-572-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - PA | 002F | LATROBE | PA |
| 2016-04-08 | 724-572-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - PA | 002F | LATROBE | PA |
| 2018-10-12 | 724-572-9XXX | 9000–9999 | Assigned | CORE COMMUNICATIONS, INC. - PA | 3806 | LATROBE | PA |
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.