NumberResearchThousands-blocks in 240-573
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 240-573 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 240 blocks
Most active assignees, last 30 days — NPA 240
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 |
|---|---|---|---|---|---|---|---|
| 2025-07-15 | 240-573-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNG236Z15 | MD |
| 2025-10-10 | 240-573-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNG236Z15 | MD |
| 2012-03-07 | 240-573-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MD | 876D | WSNG236Z15 | MD |
| 2026-09-03 | 240-573-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | WSNG236Z15 | MD |
| — | 240-573-4XXX | 4000–4999 | Available | WSNG236Z15 | MD | ||
| 2026-07-16 | 240-573-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | WSNG236Z15 | MD |
| 2014-12-05 | 240-573-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | WSNG236Z15 | MD |
| 2012-05-16 | 240-573-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | WSNG236Z15 | MD |
| 2014-12-05 | 240-573-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | WSNG236Z15 | MD |
| 2016-05-02 | 240-573-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | WSNG236Z15 | MD |
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.