NumberResearchThousands-blocks in 641-631
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 641-631 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 641 blocks
Most active assignees, all time — NPA 641
New assignments by month
Sep 2026
Aug 2026
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Apr 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 |
|---|---|---|---|---|---|---|---|
| 2018-04-30 | 641-631-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | CHARLES CY | IA |
| 2017-12-06 | 641-631-1XXX | 1000–1999 | Assigned | OMNITEL COMMUNICATIONS, INC. - IA | 3620 | CHARLES CY | IA |
| 2017-12-06 | 641-631-2XXX | 2000–2999 | Assigned | OMNITEL COMMUNICATIONS, INC. - IA | 3620 | CHARLES CY | IA |
| 2017-12-06 | 641-631-3XXX | 3000–3999 | Assigned | OMNITEL COMMUNICATIONS, INC. - IA | 3620 | CHARLES CY | IA |
| 2017-12-06 | 641-631-4XXX | 4000–4999 | Assigned | OMNITEL COMMUNICATIONS, INC. - IA | 3620 | CHARLES CY | IA |
| 2017-12-06 | 641-631-5XXX | 5000–5999 | Assigned | OMNITEL COMMUNICATIONS, INC. - IA | 3620 | CHARLES CY | IA |
| 2018-04-30 | 641-631-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - IA | 985E | CHARLES CY | IA |
| 2018-03-01 | 641-631-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CHARLES CY | IA |
| 2018-03-01 | 641-631-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CHARLES CY | IA |
| 2018-05-02 | 641-631-9XXX | 9000–9999 | Assigned | INTEGRATED PATH COMMUNCATIONS, LLC - IA | 544H | CHARLES CY | IA |
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.