| File Extension: | DTN |
| File Type Description: | TunnelCAD Import Or Export File |
| File Type Developer: | IQSoft |
| Primary Associated Software: | Tunnel CAD |
| Primary Software Developer: | IQSoft |
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Primarily, a DTN file extension is a type of TunnelCAD Import Or Export File file developed for the Tunnel CAD software program by IQSoft. Annoymous user data statistics infer that DTN files are most popular in Romania and with those using Windows 10 devices. In most cases, these users are surfing the internet using the Google Chrome browser.
 | Tunnel CAD by IQSoft |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .VSP | Corel | Video Files | VideoStudio Project File |
| .SHE | CAD Schroer | CAD Files | Medusa 2D CAD File |
| .NEU | Parametric Technology Corporation | CAD Files | Pro/ENGINEER Neutral File |
| .ECA | Unknown Developer | CAD Files | ElectroCAD File |
| .PSMODEL | Autodesk, Inc. | CAD Files | PowerSHAPE 3D Model File |
| .EMV | National Instruments | Developer Files | LabVIEW Configuration File |
| .NCZ | Netcad | CAD Files | Netcad Drawing |
| .MC3 | Interactive Design Systems (IDS) | CAD Files | Bridge Design Modeler 3D Match-casting Geometry Control |
| .CPA | Zuken | CAD Files | CADSTAR PCB Archive File |
| .HTP | Autodesk, Inc. | CAD Files | Autodesk Slope Template Definition |
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