NumberResearchThousands-blocks in 401-409
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 401-409 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
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-04-14 | 401-409-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | CAROLINA | RI |
| 2017-11-13 | 401-409-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | CAROLINA | RI |
| 2018-12-12 | 401-409-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CAROLINA | RI |
| 2019-04-11 | 401-409-3XXX | 3000–3999 | Assigned | ONVOY, LLC - RI | 977E | CAROLINA | RI |
| 2020-05-08 | 401-409-4XXX | 4000–4999 | Assigned | ONVOY, LLC - RI | 977E | CAROLINA | RI |
| 2020-05-08 | 401-409-5XXX | 5000–5999 | Assigned | ONVOY, LLC - RI | 977E | CAROLINA | RI |
| — | 401-409-6XXX | 6000–6999 | Available | CAROLINA | RI | ||
| 2016-02-23 | 401-409-7XXX | 7000–7999 | Assigned | ONVOY, LLC - RI | 977E | CAROLINA | RI |
| 2016-02-23 | 401-409-8XXX | 8000–8999 | Assigned | ONVOY, LLC - RI | 977E | CAROLINA | RI |
| 2012-06-12 | 401-409-9XXX | 9000–9999 | Assigned | AT&T - LOCAL | 7421 | CAROLINA | 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.