Many "IOT" providers give physical numbers for almost no cost, and they provide physical SIM cards for the service. The aren't VOIP so aren't blocked by twilio, etc for use with Twitter and other services.
Any examples of providers?
Hologram.io or Twilio
These and even much smaller providers are usually known to spammers. I've had poor luck with them.
You can sign up for a Twitter account with a Twilio number? I'd be surprised