NumberResearchThousands-blocks in 307-776
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 307-776 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 307 blocks
Most active assignees, all time — NPA 307
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-03-12 | 307-776-0XXX | 0000–0999 | Assigned | VONAGE AMERICA LLC | 197D | CASPER | WY |
| 2021-04-22 | 307-776-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | CASPER | WY |
| 2021-06-11 | 307-776-2XXX | 2000–2999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2021-06-11 | 307-776-3XXX | 3000–3999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2019-10-08 | 307-776-4XXX | 4000–4999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2019-10-08 | 307-776-5XXX | 5000–5999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2019-06-10 | 307-776-6XXX | 6000–6999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2019-06-10 | 307-776-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WY | 450F | CASPER | WY |
| 2021-10-21 | 307-776-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASPER | WY |
| 2019-09-25 | 307-776-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - WY | 081F | CASPER | WY |
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.