These are Twilio numbers. I have had success with verification using Twilio numbers although sometimes the "Call me instead" option is required. I implemented a

These are Twilio numbers. I have had success with verification using Twilio numbers although sometimes the "Call me instead" option is required. I implemented a simple voicemail inbox for those cases. Your mileage may vary of course. I'd like to collect a list of services that don't allow verification at all via landline/VoIP and post it.