Need a temporary number to forward all your calls to? Numbr.com allows you to sign up for an auto expiring free anonymous call forwarding number. Simply, they give you a number that expires within a certain amount of time.

Signing up
You give them your phone number and they give you a temporary number that forwards to the number you have given. You can get a number that expires from within one hour to within one month. Unfortunately once the number expires, it will no longer work.

Alternative Sign up
You can also sign up for a free anonymous call forwarding number from any US phone simply by dialing (415) 234 5678.

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