NumberResearchThousands-blocks in 414-387
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 414-387 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
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-03-29 | 414-387-0XXX | 0000–0999 | Assigned | ONVOY, LLC - WI | 225C | MILWAUKZN1 | WI |
| 2024-03-29 | 414-387-1XXX | 1000–1999 | Assigned | ONVOY, LLC - WI | 225C | MILWAUKZN1 | WI |
| 2024-03-29 | 414-387-2XXX | 2000–2999 | Assigned | ONVOY, LLC - WI | 225C | MILWAUKZN1 | WI |
| 2024-04-23 | 414-387-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | MILWAUKZN1 | WI |
| 2025-01-09 | 414-387-4XXX | 4000–4999 | Assigned | ONVOY, LLC - WI | 225C | MILWAUKZN1 | WI |
| 2025-01-06 | 414-387-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| 2025-01-06 | 414-387-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| 2025-01-06 | 414-387-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| 2024-12-12 | 414-387-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WI | 225C | MILWAUKZN1 | WI |
| 2025-01-06 | 414-387-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | 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.