NumberResearchThousands-blocks in 254-605
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 254-605 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 254 blocks
Most active assignees, all time — NPA 254
New assignments by month
Sep 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 254-605-0XXX | 0000–0999 | Reserved | SOUTHWESTERN BELL | 9533 | CAMERON | TX |
| — | 254-605-1XXX | 1000–1999 | Reserved | SOUTHWESTERN BELL | 9533 | CAMERON | TX |
| 2021-07-01 | 254-605-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | CAMERON | TX |
| 2024-04-10 | 254-605-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | CAMERON | TX |
| 2012-01-13 | 254-605-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CAMERON | TX |
| 2025-09-23 | 254-605-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CAMERON | TX |
| 2013-11-13 | 254-605-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TX | 903C | CAMERON | TX |
| 2009-07-07 | 254-605-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7138 | CAMERON | TX |
| 2021-10-07 | 254-605-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | CAMERON | TX |
| 2023-07-26 | 254-605-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TX | 903C | CAMERON | TX |
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.