NumberResearchThousands-blocks in 281-346
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 281-346 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 281 blocks
Most active assignees, all time — NPA 281
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 281-346-0XXX | 0000–0999 | Reserved | SOUTHWESTERN BELL | 9533 | VLY LODGE | TX |
| — | 281-346-1XXX | 1000–1999 | Reserved | SOUTHWESTERN BELL | 9533 | VLY LODGE | TX |
| — | 281-346-2XXX | 2000–2999 | Reserved | SOUTHWESTERN BELL | 9533 | VLY LODGE | TX |
| 2010-11-03 | 281-346-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - TX | 004F | VLY LODGE | TX |
| 2005-12-06 | 281-346-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | VLY LODGE | TX |
| 2009-06-12 | 281-346-5XXX | 5000–5999 | Assigned | WESTEL, INC. - TX | 7399 | VLY LODGE | TX |
| — | 281-346-6XXX | 6000–6999 | Reserved | SOUTHWESTERN BELL | 9533 | VLY LODGE | TX |
| 2011-03-15 | 281-346-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TX | 903C | VLY LODGE | TX |
| 2007-05-17 | 281-346-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | VLY LODGE | TX |
| 2013-01-08 | 281-346-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TX | 903C | VLY LODGE | 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.