Who called from 2102490540

I answered the phone; said hello twice, but no one answered.  I then said "Nothing heard" and hung up.

Received call from 210-249-0540 with caller ID as Novatel - let ring, no message left on vmail.

I am on the do not call list and still get calls from this number
who do I report them too.  There is no answer if you call back.

File a complaint. If your number has been on the registry for at least 31 days, and a telemarketer calls, complain to the FTC. Visit DONOTCALL.GOV or call 1-888-382-1222 (TTY1-866-290-4236). You’ll need to provide the date of the call and the phone number or name of the company that called you.

https://www.donotcall.gov/

they call all the time...every hour for some grant I applied for...which I did not....and they want me to finish my application...which I did not start....