NumberResearchThousands-blocks in 806-303
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 806-303 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 806 blocks
Most active assignees, all time — NPA 806
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-08-21 | 806-303-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TX | 903C | POST | TX |
| 2024-11-12 | 806-303-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | POST | TX |
| — | 806-303-2XXX | 2000–2999 | Available | POST | TX | ||
| 2025-09-15 | 806-303-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | POST | TX |
| 2026-08-18 | 806-303-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | POST | TX |
| 2013-11-05 | 806-303-5XXX | 5000–5999 | Assigned | CEBRIDGE TELECOM TX , L.P. - TX | 318C | POST | TX |
| 2021-03-30 | 806-303-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7148 | POST | TX |
| — | 806-303-7XXX | 7000–7999 | Available | POST | TX | ||
| — | 806-303-8XXX | 8000–8999 | Available | POST | TX | ||
| — | 806-303-9XXX | 9000–9999 | Available | POST | 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.