Web API partially (start with) match route in Controller

How can I map multiple urls to one action method? For example http://localhost:10000/api/ABC and http://localhost:10000/api/ABCDCD will map to same action name because both starts with ABC. I can't add ABC and ABCDCD as routes because I would not know in advance what user will pass.

Here is my current method

[HttpGet]
[Route("~/api/ABC/")]
public HttpResponseMessage GetData()
{
}

I tried using {ver} but it did not work.

You can use patterns.

[HttpGet]
[Route("~/api/ABC{data}")]
public IActionResult GetData(string data)
{
    return Ok(data);
}

When you request https://localhost/api/ABCEXAMPLE the value of string data would be EXAMPLE. You can even do not use it if you don't want.

UPD:

The better solution is to use regex:

[HttpGet]
[Route("~/api/{s:regex(^ABC.*)}")]
public IActionResult GetData()
{
    return Ok();
}