NumberResearchThousands-blocks in 417-356
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 417-356 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 417 blocks
Most active assignees, all time — NPA 417
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 417-356-0XXX | 0000–0999 | Reserved | UNITED STATES CELLULAR - MO | 6275 | CARTHAGE | MO |
| 2020-11-19 | 417-356-1XXX | 1000–1999 | Assigned | UNITED STATES CELLULAR - MO | 6275 | CARTHAGE | MO |
| 2021-01-26 | 417-356-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CARTHAGE | MO |
| 2014-10-30 | 417-356-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MO | 993E | CARTHAGE | MO |
| 2015-01-29 | 417-356-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - MO | 993E | CARTHAGE | MO |
| 2021-05-15 | 417-356-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | CARTHAGE | MO |
| 2017-08-17 | 417-356-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | CARTHAGE | MO |
| 2014-05-09 | 417-356-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CARTHAGE | MO |
| 2016-07-28 | 417-356-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MO | 093F | CARTHAGE | MO |
| 2022-08-24 | 417-356-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | CARTHAGE | MO |
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.