NumberResearchThousands-blocks in 540-497
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 540-497 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
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Jun 2026
May 2026
Apr 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2019-06-06 | 540-497-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | CULPEPER | VA |
| 2003-09-24 | 540-497-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | CULPEPER | VA |
| 2004-09-28 | 540-497-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | CULPEPER | VA |
| 2006-02-01 | 540-497-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | CULPEPER | VA |
| 2016-06-14 | 540-497-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | CULPEPER | VA |
| 2018-10-08 | 540-497-5XXX | 5000–5999 | Assigned | NUSO, LLC | 551G | CULPEPER | VA |
| 2018-10-08 | 540-497-6XXX | 6000–6999 | Assigned | NUSO, LLC | 551G | CULPEPER | VA |
| 2019-02-12 | 540-497-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF VIRGINIA, LLC - VA | 275G | CULPEPER | VA |
| 2024-05-08 | 540-497-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | CULPEPER | VA |
| 2024-05-08 | 540-497-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | CULPEPER | 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.