NumberResearchThousands-blocks in 931-557
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 931-557 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-09-14 | 931-557-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | FAYETTEVL | TN |
| 2021-04-22 | 931-557-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | FAYETTEVL | TN |
| — | 931-557-2XXX | 2000–2999 | Available | FAYETTEVL | TN | ||
| 2010-12-29 | 931-557-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | FAYETTEVL | TN |
| 2016-04-18 | 931-557-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | FAYETTEVL | TN |
| 2010-07-19 | 931-557-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FAYETTEVL | TN |
| 2018-08-31 | 931-557-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | FAYETTEVL | TN |
| 2010-09-10 | 931-557-7XXX | 7000–7999 | Assigned | AENEAS COMMUNICATIONS, LLC - TN | 2891 | FAYETTEVL | TN |
| 2008-02-01 | 931-557-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | FAYETTEVL | TN |
| 2008-02-01 | 931-557-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | FAYETTEVL | TN |
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.