NumberResearchThousands-blocks in 254-638
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 254-638 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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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 254-638-0XXX | 0000–0999 | Available | CROSS PL | TX | ||
| 2021-06-09 | 254-638-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CROSS PL | TX |
| 2025-07-18 | 254-638-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CROSS PL | TX |
| 2011-08-04 | 254-638-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | CROSS PL | TX |
| 2021-09-23 | 254-638-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TX | 903C | CROSS PL | TX |
| 2021-07-20 | 254-638-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TX | 903C | CROSS PL | TX |
| 2021-11-08 | 254-638-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CROSS PL | TX |
| 2021-05-12 | 254-638-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | CROSS PL | TX |
| 2022-10-12 | 254-638-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7148 | CROSS PL | TX |
| 2021-11-08 | 254-638-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CROSS PL | TX |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.