US temporary numbers on InstantSMS use the standard +1 country code followed by a 10-digit local number. When entering a number into a website or app, use the full international format - for example +12015550123 - and skip the leading "1" trunk prefix if the form already provides the country code separately. These numbers cover a mix of area codes from across the country and rotate regularly as older lines are recycled and new ones added. Because US numbers are among the most widely used for SMS verification, availability is higher here than in most other countries, but higher traffic also means some numbers get flagged faster by stricter platforms. Pick a number showing recent inbox activity for the best chance of receiving your code quickly.
App compatibility
- Generally reliable for: Discord, Instagram, Amazon, Reddit, most e-commerce sign-ups
- Mixed results: Telegram, Facebook (works on some numbers, blocked on others)
- Frequently blocked: WhatsApp, Google/Gmail - these run stricter VoIP detection on shared US lines
