NumberResearchThousands-blocks in 458-345
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 458-345 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 458 blocks
Most active assignees, all time — NPA 458
New assignments by month
Sep 2026
Aug 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-08-18 | 458-345-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | ENTERPRISE | OR |
| 2021-08-23 | 458-345-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | ENTERPRISE | OR |
| 2025-03-21 | 458-345-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ENTERPRISE | OR |
| — | 458-345-3XXX | 3000–3999 | Available | ENTERPRISE | OR | ||
| 2022-10-26 | 458-345-4XXX | 4000–4999 | Assigned | ONVOY, LLC - OR | 750E | ENTERPRISE | OR |
| — | 458-345-5XXX | 5000–5999 | Available | ENTERPRISE | OR | ||
| 2021-07-16 | 458-345-6XXX | 6000–6999 | Assigned | FRACTEL, LLC | 965H | ENTERPRISE | OR |
| — | 458-345-7XXX | 7000–7999 | Available | ENTERPRISE | OR | ||
| 2025-04-07 | 458-345-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | ENTERPRISE | OR |
| — | 458-345-9XXX | 9000–9999 | Available | ENTERPRISE | OR |
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.