<div dir="ltr">From what I know, the carrier has to either offer that option or flag it for you, so you can reject it<div>There's no standard for flagging it, nor do all companies, and there's also no easy way to look up the number in a database to check if it's a payphone.</div>
<div><br></div><div>If someone can tell me otherwise or list TF origination providers that DO flag it that would be helpful.</div><div><br></div><div>-Avi</div></div>