NumberResearchThousands-blocks in 641-210
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 641-210 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2006-01-03 | 641-210-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | MASON CITY | IA |
| 2007-05-15 | 641-210-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | MASON CITY | IA |
| 2004-12-13 | 641-210-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | MASON CITY | IA |
| 2023-04-07 | 641-210-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | MASON CITY | IA |
| 2006-08-07 | 641-210-4XXX | 4000–4999 | Assigned | OMNITEL COMMUNICATIONS, INC. - IA | 3620 | MASON CITY | IA |
| 2006-10-04 | 641-210-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | MASON CITY | IA |
| 2017-11-01 | 641-210-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | MASON CITY | IA |
| 2006-08-31 | 641-210-7XXX | 7000–7999 | Assigned | MCC TELEPHONY OF IOWA, LLC - IA | 751F | MASON CITY | IA |
| 2005-03-07 | 641-210-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MASON CITY | IA |
| — | 641-210-9XXX | 9000–9999 | Reserved | T-MOBILE USA, INC. | 6529 | MASON CITY | IA |
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.