NumberResearchThousands-blocks in 401-217
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 401-217 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 |
|---|---|---|---|---|---|---|---|
| 2005-12-07 | 401-217-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - RI | 4016 | WGLOCESTER | RI |
| — | 401-217-1XXX | 1000–1999 | Available | WGLOCESTER | RI | ||
| 2011-08-17 | 401-217-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - RI | 003F | WGLOCESTER | RI |
| 2010-07-29 | 401-217-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - RI | 003F | WGLOCESTER | RI |
| 2004-09-03 | 401-217-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - RI | 4016 | WGLOCESTER | RI |
| 2010-07-29 | 401-217-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - RI | 003F | WGLOCESTER | RI |
| — | 401-217-6XXX | 6000–6999 | Reserved | PAETEC ITEL, LLC | 829J | WGLOCESTER | RI |
| 2015-11-06 | 401-217-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | WGLOCESTER | RI |
| 2015-09-28 | 401-217-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF RHODE ISLAND, LLC - RI | 631G | WGLOCESTER | RI |
| 2009-01-08 | 401-217-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - RI | 003F | WGLOCESTER | 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.