NumberResearchThousands-blocks in 507-428
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 507-428 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 507 blocks
Most active assignees, all time — NPA 507
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-06-25 | 507-428-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | GHENT | MN |
| — | 507-428-1XXX | 1000–1999 | Reserved | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | GHENT | MN |
| 2019-08-13 | 507-428-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MN | 184D | GHENT | MN |
| — | 507-428-3XXX | 3000–3999 | Reserved | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | GHENT | MN |
| 2017-05-01 | 507-428-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MN | 184D | GHENT | MN |
| 2017-03-28 | 507-428-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GHENT | MN |
| 2015-02-18 | 507-428-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MN | 184D | GHENT | MN |
| 2019-08-13 | 507-428-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MN | 184D | GHENT | MN |
| 2020-10-05 | 507-428-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MN | 184D | GHENT | MN |
| — | 507-428-9XXX | 9000–9999 | Reserved | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | GHENT | MN |
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.