NumberResearchThousands-blocks in 254-537
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 254-537 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 254-537-0XXX | 0000–0999 | Reserved | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 7670 | WACO | TX |
| 2006-03-08 | 254-537-1XXX | 1000–1999 | Assigned | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 7670 | WACO | TX |
| 2006-08-14 | 254-537-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | WACO | TX |
| 2006-08-14 | 254-537-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | WACO | TX |
| 2008-01-28 | 254-537-4XXX | 4000–4999 | Assigned | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 7670 | WACO | TX |
| 2023-06-05 | 254-537-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TX | 903C | WACO | TX |
| 2010-10-04 | 254-537-6XXX | 6000–6999 | Assigned | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 7670 | WACO | TX |
| 2018-01-31 | 254-537-7XXX | 7000–7999 | Assigned | NUSO, LLC | 551G | WACO | TX |
| — | 254-537-8XXX | 8000–8999 | Available | WACO | TX | ||
| — | 254-537-9XXX | 9000–9999 | Reserved | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 7670 | WACO | 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.