NumberResearchThousands-blocks in 903-651
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 903-651 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2006-12-20 | 903-651-0XXX | 0000–0999 | Assigned | CSC VOICE, LLC | 612K | WHITESBORO | TX |
| — | 903-651-1XXX | 1000–1999 | Reserved | T-MOBILE USA, INC. | 6529 | WHITESBORO | TX |
| 2014-01-24 | 903-651-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | WHITESBORO | TX |
| — | 903-651-3XXX | 3000–3999 | Reserved | T-MOBILE USA, INC. | 6529 | WHITESBORO | TX |
| 2017-11-20 | 903-651-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | WHITESBORO | TX |
| 2019-05-07 | 903-651-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | WHITESBORO | TX |
| — | 903-651-6XXX | 6000–6999 | Reserved | T-MOBILE USA, INC. | 6529 | WHITESBORO | TX |
| 2014-04-24 | 903-651-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | WHITESBORO | TX |
| 2024-03-25 | 903-651-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WHITESBORO | TX |
| — | 903-651-9XXX | 9000–9999 | Reserved | T-MOBILE USA, INC. | 6529 | WHITESBORO | 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.