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UNCM(4) Device Drivers Manual UNCM(4)

uncm — USB Network Control Model Ethernet device

uncm* at uhub?

The uncm driver provides support for USB Network Control Model (NCM) Ethernet devices, commonly used for USB tethering.

uncm should work with devices that provide USB tethering via NCM, such as most Android devices.

intro(4), netintro(4), usb(4), hostname.if(5), ifconfig(8)

The uncm device driver first appeared in OpenBSD 8.1.

The uncm driver was written by Jan Schreiber <jes@posteo.de> and is based on the umb(4) driver.

OpenBSD-current October 11, 2026 UNCM(4)