NumberResearchThousands-blocks in 401-405
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 401-405 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 401 blocks
Most active assignees, all time — NPA 401
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 401-405-0XXX | 0000–0999 | Reserved | COMCAST IP PHONE, LLC | 318J | CUMBLND HL | RI |
| 2009-01-08 | 401-405-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - RI | 003F | CUMBLND HL | RI |
| 2009-03-25 | 401-405-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | CUMBLND HL | RI |
| 2008-08-12 | 401-405-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | CUMBLND HL | RI |
| 2010-02-10 | 401-405-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - RI | 003F | CUMBLND HL | RI |
| 2004-11-17 | 401-405-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | CUMBLND HL | RI |
| 2006-10-02 | 401-405-6XXX | 6000–6999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CUMBLND HL | RI |
| 2020-10-15 | 401-405-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CUMBLND HL | RI |
| 2015-09-24 | 401-405-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CUMBLND HL | RI |
| 2024-07-30 | 401-405-9XXX | 9000–9999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | CUMBLND HL | RI |
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.