NumberResearchThousands-blocks in 903-608
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 903-608 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 903 blocks
Most active assignees, all time — NPA 903
New assignments by month
Sep 2026
Aug 2026
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Jun 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-01-06 | 903-608-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TX | 903C | TLSVNPONTS | TX |
| 2021-01-06 | 903-608-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TX | 903C | TLSVNPONTS | TX |
| — | 903-608-2XXX | 2000–2999 | Available | TLSVNPONTS | TX | ||
| 2014-02-03 | 903-608-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | TLSVNPONTS | TX |
| 2025-07-31 | 903-608-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TLSVNPONTS | TX |
| — | 903-608-5XXX | 5000–5999 | Available | TLSVNPONTS | TX | ||
| 2018-08-21 | 903-608-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TX | 903C | TLSVNPONTS | TX |
| — | 903-608-7XXX | 7000–7999 | Available | TLSVNPONTS | TX | ||
| — | 903-608-8XXX | 8000–8999 | Available | TLSVNPONTS | TX | ||
| 2020-02-12 | 903-608-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | TLSVNPONTS | 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.