NumberResearchThousands-blocks in 254-255
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 254-255 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
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 254-255-0XXX | 0000–0999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | GROESBECK | TX |
| 2017-05-04 | 254-255-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TX | 903C | GROESBECK | TX |
| 2021-05-09 | 254-255-2XXX | 2000–2999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | GROESBECK | TX |
| 2016-12-12 | 254-255-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | GROESBECK | TX |
| — | 254-255-4XXX | 4000–4999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | GROESBECK | TX |
| 2021-02-28 | 254-255-5XXX | 5000–5999 | Assigned | FRACTEL, LLC | 965H | GROESBECK | TX |
| 2025-05-29 | 254-255-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GROESBECK | TX |
| 2014-04-23 | 254-255-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GROESBECK | TX |
| 2021-06-08 | 254-255-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GROESBECK | TX |
| 2021-11-09 | 254-255-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GROESBECK | 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.