NumberResearchThousands-blocks in 540-413
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 540-413 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
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-03-17 | 540-413-0XXX | 0000–0999 | Assigned | ONVOY, LLC - VA | 138E | DAHLGREN | VA |
| 2008-11-12 | 540-413-1XXX | 1000–1999 | Assigned | IDT AMERICA, CORP. - VA | 231C | DAHLGREN | VA |
| 2009-03-17 | 540-413-2XXX | 2000–2999 | Assigned | CORETEL VIRGINIA, LLC - VA | 5832 | DAHLGREN | VA |
| 2008-12-12 | 540-413-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DAHLGREN | VA |
| 2017-09-28 | 540-413-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | DAHLGREN | VA |
| 2016-12-08 | 540-413-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DAHLGREN | VA |
| — | 540-413-6XXX | 6000–6999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | DAHLGREN | VA |
| — | 540-413-7XXX | 7000–7999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | DAHLGREN | VA |
| 2014-04-08 | 540-413-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | DAHLGREN | VA |
| 2014-06-26 | 540-413-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - VA | 079F | DAHLGREN | 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.