NumberResearchThousands-blocks in 320-455
This prefix’s ten 1,000-number blocks and who holds each — 9 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 320-455 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2010-02-19 | 320-455-1XXX | 1000–1999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HUTCHINSON | MN |
| 2011-01-05 | 320-455-2XXX | 2000–2999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HUTCHINSON | MN |
| 2012-10-17 | 320-455-3XXX | 3000–3999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | HUTCHINSON | MN |
| 2017-05-22 | 320-455-4XXX | 4000–4999 | Assigned | MCC TELEPHONY LLC | 593K | HUTCHINSON | MN |
| 2015-09-25 | 320-455-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | HUTCHINSON | MN |
| 2017-09-20 | 320-455-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | HUTCHINSON | MN |
| 2010-11-15 | 320-455-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HUTCHINSON | MN |
| 2017-05-16 | 320-455-8XXX | 8000–8999 | Assigned | MCC TELEPHONY LLC | 593K | HUTCHINSON | MN |
| 2010-04-15 | 320-455-9XXX | 9000–9999 | Assigned | MCC TELEPHONY LLC | 593K | HUTCHINSON | 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.