I’m in Vietnam and had to verify my Social Security account after they changed the login system. No US line, and didn’t trust those free number apps. Used 7sim.net - found a US mobile number, no signup needed. SMS came through in 2 minutes. Used the same number later for a banking portal - still active. Numbers seem to stay live for a few hours, which was enough for me. Didn’t have to borrow a phone or explain to someone why I need their number.