NumberResearchThousands-blocks in 320-343
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 320-343 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 |
|---|---|---|---|---|---|---|---|
| — | 320-343-0XXX | 0000–0999 | Available | CLINTON | MN | ||
| 2023-08-09 | 320-343-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MN | 184D | CLINTON | MN |
| 2021-11-22 | 320-343-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MN | 184D | CLINTON | MN |
| 2023-02-01 | 320-343-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | CLINTON | MN |
| 2015-04-29 | 320-343-4XXX | 4000–4999 | Assigned | FEDERATED TELEPHONE COOPERATIVE - MN | 2629 | CLINTON | MN |
| 2024-11-19 | 320-343-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CLINTON | MN |
| — | 320-343-6XXX | 6000–6999 | Available | CLINTON | MN | ||
| 2017-05-18 | 320-343-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CLINTON | MN |
| — | 320-343-8XXX | 8000–8999 | Available | CLINTON | MN | ||
| 2010-06-22 | 320-343-9XXX | 9000–9999 | Assigned | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | CLINTON | 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.