NumberResearchThousands-blocks in 281-824
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 281-824 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
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 281-824-0XXX | 0000–0999 | Reserved | SOUTHWESTERN BELL | 9533 | ALVIN | TX |
| 2007-01-05 | 281-824-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TX | 903C | ALVIN | TX |
| 2008-02-29 | 281-824-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | ALVIN | TX |
| 2007-04-27 | 281-824-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | ALVIN | TX |
| 2005-08-15 | 281-824-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | ALVIN | TX |
| 2008-11-12 | 281-824-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | ALVIN | TX |
| 2010-04-15 | 281-824-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TX | 903C | ALVIN | TX |
| 2009-10-28 | 281-824-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TX | 903C | ALVIN | TX |
| — | 281-824-8XXX | 8000–8999 | Reserved | SOUTHWESTERN BELL | 9533 | ALVIN | TX |
| — | 281-824-9XXX | 9000–9999 | Reserved | SOUTHWESTERN BELL | 9533 | ALVIN | 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.