NumberResearchThousands-blocks in 240-668
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 240-668 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
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2008-05-06 | 240-668-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | DAMASCS236 | MD |
| — | 240-668-1XXX | 1000–1999 | Reserved | STARPOWER COMMUNICATIONS, LLC - MD | 8832 | DAMASCS236 | MD |
| 2005-10-25 | 240-668-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DAMASCS236 | MD |
| 2005-10-25 | 240-668-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DAMASCS236 | MD |
| 2009-01-09 | 240-668-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | DAMASCS236 | MD |
| 2024-05-29 | 240-668-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DAMASCS236 | MD |
| — | 240-668-6XXX | 6000–6999 | Available | DAMASCS236 | MD | ||
| — | 240-668-7XXX | 7000–7999 | Reserved | STARPOWER COMMUNICATIONS, LLC - MD | 8832 | DAMASCS236 | MD |
| — | 240-668-8XXX | 8000–8999 | Reserved | STARPOWER COMMUNICATIONS, LLC - MD | 8832 | DAMASCS236 | MD |
| 2005-10-25 | 240-668-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DAMASCS236 | MD |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.