NumberResearchThousands-blocks in 507-550
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 507-550 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
May 2026
Apr 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2010-01-21 | 507-550-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MN | 980E | ST PETER | MN |
| 2007-11-20 | 507-550-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | ST PETER | MN |
| 2011-03-16 | 507-550-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MN | 980E | ST PETER | MN |
| 2014-11-06 | 507-550-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | ST PETER | MN |
| 2026-06-11 | 507-550-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ST PETER | MN |
| 2019-11-12 | 507-550-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | ST PETER | MN |
| 2019-03-25 | 507-550-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MN | 8405 | ST PETER | MN |
| 2017-04-03 | 507-550-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ST PETER | MN |
| — | 507-550-8XXX | 8000–8999 | Available | ST PETER | MN | ||
| — | 507-550-9XXX | 9000–9999 | Available | ST PETER | 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.