NumberResearchThousands-blocks in 320-403
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 320-403 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 320 blocks
Most active assignees, all time — NPA 320
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2011-02-23 | 320-403-0XXX | 0000–0999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | WILLMAR | MN |
| 2010-05-20 | 320-403-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MN | 980E | WILLMAR | MN |
| 2010-09-08 | 320-403-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MN | 980E | WILLMAR | MN |
| 2009-11-11 | 320-403-3XXX | 3000–3999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | WILLMAR | MN |
| 2011-04-15 | 320-403-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - MN | 980E | WILLMAR | MN |
| 2016-03-04 | 320-403-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | WILLMAR | MN |
| 2009-06-04 | 320-403-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MN | 8405 | WILLMAR | MN |
| 2011-07-26 | 320-403-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | WILLMAR | MN |
| 2018-10-17 | 320-403-8XXX | 8000–8999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | WILLMAR | MN |
| 2012-09-06 | 320-403-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MN | 184D | WILLMAR | 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.