NumberResearchThousands-blocks in 240-745
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/21/2026
The ten 1,000-number thousand-blocks inside prefix 240-745 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 240-745-0XXX | 0000–0999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DAMASCS236 | MD |
| 2004-01-15 | 240-745-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | DAMASCS236 | MD |
| 2013-05-06 | 240-745-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | DAMASCS236 | MD |
| — | 240-745-3XXX | 3000–3999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DAMASCS236 | MD |
| 2010-07-19 | 240-745-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | DAMASCS236 | MD |
| 2010-01-26 | 240-745-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | DAMASCS236 | MD |
| 2013-06-25 | 240-745-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | DAMASCS236 | MD |
| 2015-05-28 | 240-745-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MD | 876D | DAMASCS236 | MD |
| 2015-02-19 | 240-745-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | DAMASCS236 | MD |
| 2019-04-11 | 240-745-9XXX | 9000–9999 | Assigned | CORE COMMUNICATIONS, INC.- MD | 2593 | DAMASCS236 | MD |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.