NumberResearchThousands-blocks in 507-481
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 507-481 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 507 blocks
Most active assignees, all time — NPA 507
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 |
|---|---|---|---|---|---|---|---|
| 2011-05-10 | 507-481-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MN | 980E | AUSTIN | MN |
| 2012-09-06 | 507-481-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MN | 184D | AUSTIN | MN |
| 2012-09-13 | 507-481-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MN | 980E | AUSTIN | MN |
| 2012-09-24 | 507-481-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MN | 980E | AUSTIN | MN |
| 2013-01-17 | 507-481-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | AUSTIN | MN |
| 2013-10-28 | 507-481-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | AUSTIN | MN |
| 2014-07-08 | 507-481-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | AUSTIN | MN |
| 2012-05-29 | 507-481-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | AUSTIN | MN |
| 2013-08-27 | 507-481-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | AUSTIN | MN |
| 2020-03-24 | 507-481-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | AUSTIN | MN |
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.