The Verge reported that 4.6 million Snapchat usernames and phone numbers were hacked and posted online over the last couple of days and yours could be one of them.
To see if yours might have been included, go to GS Lookup-Snapchat, enter your username and see if it reveals all but the last two digits of your phone number.
The leak occurred just a few days after Snapchat admitted that “Theoretically, if someone were able to upload a huge set of phone numbers, like every number in an area code, or every possible number in the U.S., they could create a database of the results and match usernames to phone numbers that way.”