NumberResearchThousands-blocks in 320-449
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 320-449 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
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 320-449-0XXX | 0000–0999 | Available | PIERZ | MN | ||
| — | 320-449-1XXX | 1000–1999 | Available | PIERZ | MN | ||
| — | 320-449-2XXX | 2000–2999 | Available | PIERZ | MN | ||
| — | 320-449-3XXX | 3000–3999 | Available | PIERZ | MN | ||
| 2025-04-29 | 320-449-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | PIERZ | MN |
| — | 320-449-5XXX | 5000–5999 | Available | PIERZ | MN | ||
| 2022-08-23 | 320-449-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MN | 8405 | PIERZ | MN |
| 2023-02-01 | 320-449-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | PIERZ | MN |
| — | 320-449-8XXX | 8000–8999 | Available | PIERZ | MN | ||
| 2021-05-06 | 320-449-9XXX | 9000–9999 | Assigned | AERIAL COMMUNICATIONS, INC. | 6701 | PIERZ | 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.