NumberResearchThousands-blocks in 540-572
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 540-572 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 540 blocks
Most active assignees, all time — NPA 540
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2008-11-06 | 540-572-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - VA | 079F | BUENAVISTA | VA |
| 2020-12-09 | 540-572-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | BUENAVISTA | VA |
| 2012-01-31 | 540-572-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | BUENAVISTA | VA |
| 2011-07-11 | 540-572-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BUENAVISTA | VA |
| 2004-06-24 | 540-572-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - VA | 8825 | BUENAVISTA | VA |
| 2013-11-20 | 540-572-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BUENAVISTA | VA |
| 2012-06-27 | 540-572-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - VA | 4644 | BUENAVISTA | VA |
| 2019-08-21 | 540-572-7XXX | 7000–7999 | Assigned | ONVOY, LLC - VA | 138E | BUENAVISTA | VA |
| — | 540-572-8XXX | 8000–8999 | Reserved | UNITED STATES CELLULAR - VA | 6283 | BUENAVISTA | VA |
| 2021-02-04 | 540-572-9XXX | 9000–9999 | Assigned | ONVOY, LLC - VA | 138E | BUENAVISTA | VA |
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.