NumberResearchThousands-blocks in 414-375
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 414-375 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 414 blocks
Most active assignees, all time — NPA 414
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-06-21 | 414-375-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | MILWAUKZN4 | WI |
| 2004-10-27 | 414-375-1XXX | 1000–1999 | Assigned | TDS METROCOM, LLC | 520K | MILWAUKZN4 | WI |
| 2005-06-21 | 414-375-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | MILWAUKZN4 | WI |
| 2006-09-20 | 414-375-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | MILWAUKZN4 | WI |
| — | 414-375-4XXX | 4000–4999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | MILWAUKZN4 | WI |
| 2019-02-11 | 414-375-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | MILWAUKZN4 | WI |
| 2019-03-06 | 414-375-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | MILWAUKZN4 | WI |
| 2008-08-01 | 414-375-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WI | 225C | MILWAUKZN4 | WI |
| 2026-04-24 | 414-375-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WI | 225C | MILWAUKZN4 | WI |
| 2008-10-23 | 414-375-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | MILWAUKZN4 | WI |
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.