NumberResearchThousands-blocks in 240-528
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 240-528 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, all time — NPA 240
New assignments by month
Sep 2026
Aug 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2006-01-18 | 240-528-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | HUGHESVL | MD |
| 2009-03-03 | 240-528-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | HUGHESVL | MD |
| 2015-04-14 | 240-528-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | HUGHESVL | MD |
| 2007-09-24 | 240-528-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | HUGHESVL | MD |
| 2004-02-10 | 240-528-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | HUGHESVL | MD |
| 2010-11-16 | 240-528-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | HUGHESVL | MD |
| 2024-03-13 | 240-528-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | HUGHESVL | MD |
| 2011-02-10 | 240-528-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | HUGHESVL | MD |
| 2011-03-07 | 240-528-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | HUGHESVL | MD |
| 2021-08-30 | 240-528-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HUGHESVL | 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.