NumberResearchThousands-blocks in 740-578
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 740-578 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 740 blocks
Most active assignees, all time — NPA 740
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-02-07 | 740-578-0XXX | 0000–0999 | Assigned | ONVOY, LLC - OH | 464C | GALLIPOLIS | OH |
| 2005-03-02 | 740-578-1XXX | 1000–1999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | GALLIPOLIS | OH |
| 2023-03-07 | 740-578-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | GALLIPOLIS | OH |
| 2012-05-29 | 740-578-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | GALLIPOLIS | OH |
| 2004-06-29 | 740-578-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | GALLIPOLIS | OH |
| — | 740-578-5XXX | 5000–5999 | Available | GALLIPOLIS | OH | ||
| 2006-09-06 | 740-578-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | GALLIPOLIS | OH |
| 2004-02-11 | 740-578-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | GALLIPOLIS | OH |
| — | 740-578-8XXX | 8000–8999 | Available | GALLIPOLIS | OH | ||
| 2008-12-05 | 740-578-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - OH | 001F | GALLIPOLIS | OH |
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.