These are fictitious US phone numbers or temporary US phone numbers. This implies that they will only be available for a limited time. Some US phone numbers are valid for months, while others are only valid for a few days.
Please do not use a US phone number for essential text messaging like passwords, secret text messages to pals, or website phone verification. By reading the text messages from these US phone numbers, anyone could gain access to your account.
If you don't live in the United States but still want to use a website or app that only allows Americans, you'll need a phone number in the United States to authenticate your account.
Most websites that demand phone number verification impose a limit on the number of times you can use it. It is possible that some of our US phone numbers will be blocked in this situation. But this isn't a major issue. Simply dial one of our other United States phone numbers.