NumberResearchThousands-blocks in 218-644
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 218-644 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 218 blocks
Most active assignees, all time — NPA 218
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 218-644-0XXX | 0000–0999 | Reserved | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | CROMWELL | MN |
| — | 218-644-1XXX | 1000–1999 | Reserved | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | CROMWELL | MN |
| 2020-06-18 | 218-644-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | CROMWELL | MN |
| — | 218-644-3XXX | 3000–3999 | Reserved | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | CROMWELL | MN |
| 2021-02-08 | 218-644-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MN | 184D | CROMWELL | MN |
| — | 218-644-5XXX | 5000–5999 | Reserved | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | CROMWELL | MN |
| 2015-05-20 | 218-644-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MN | 184D | CROMWELL | MN |
| 2016-06-27 | 218-644-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MN | 184D | CROMWELL | MN |
| — | 218-644-8XXX | 8000–8999 | Reserved | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | CROMWELL | MN |
| — | 218-644-9XXX | 9000–9999 | Reserved | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | CROMWELL | 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.