NumberResearchThousands-blocks in 414-751
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 414-751 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 |
|---|---|---|---|---|---|---|---|
| 2010-12-20 | 414-751-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | MILWAUKZN4 | WI |
| — | 414-751-1XXX | 1000–1999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | MILWAUKZN4 | WI |
| 2006-10-13 | 414-751-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | MILWAUKZN4 | WI |
| 2006-10-13 | 414-751-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | MILWAUKZN4 | WI |
| — | 414-751-4XXX | 4000–4999 | Available | MILWAUKZN4 | WI | ||
| — | 414-751-5XXX | 5000–5999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | MILWAUKZN4 | WI |
| 2013-12-26 | 414-751-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | MILWAUKZN4 | WI |
| 2010-10-25 | 414-751-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MILWAUKZN4 | WI |
| 2010-10-26 | 414-751-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | MILWAUKZN4 | WI |
| — | 414-751-9XXX | 9000–9999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | MILWAUKZN4 | WI |
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.