NumberResearchThousands-blocks in 931-481
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 931-481 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 931 blocks
Most active assignees, last 30 days — NPA 931
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Apr 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-06-01 | 931-481-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | CROSSVILLE | TN |
| 2026-07-30 | 931-481-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | CROSSVILLE | TN |
| — | 931-481-2XXX | 2000–2999 | Available | CROSSVILLE | TN | ||
| — | 931-481-3XXX | 3000–3999 | Available | CROSSVILLE | TN | ||
| — | 931-481-4XXX | 4000–4999 | Available | CROSSVILLE | TN | ||
| — | 931-481-5XXX | 5000–5999 | Available | CROSSVILLE | TN | ||
| — | 931-481-6XXX | 6000–6999 | Available | CROSSVILLE | TN | ||
| — | 931-481-7XXX | 7000–7999 | Available | CROSSVILLE | TN | ||
| 2026-09-04 | 931-481-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | CROSSVILLE | TN |
| — | 931-481-9XXX | 9000–9999 | Available | CROSSVILLE | TN |
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.