NumberResearchThousands-blocks in 424-475
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 424-475 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 424 blocks
Most active assignees, all time — NPA 424
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-05-13 | 424-475-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2022-05-13 | 424-475-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2022-05-13 | 424-475-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2022-05-13 | 424-475-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2022-10-24 | 424-475-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | TORRANCE | CA |
| 2022-05-27 | 424-475-5XXX | 5000–5999 | Assigned | BARR TELL USA, LLC | 026K | TORRANCE | CA |
| 2022-05-23 | 424-475-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | TORRANCE | CA |
| 2022-01-11 | 424-475-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | TORRANCE | CA |
| 2021-12-28 | 424-475-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | TORRANCE | CA |
| 2021-12-10 | 424-475-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
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.