Hackers obtained and leaked account information for 4.6 million users of the photo sharing app Snapchat. The website SnapchatDB.info went online late New Year’s Eve with the database but was taken down the following morning.

Those behind the leak say they did it to prove a point rather than to compromise personal information. “This database contains username and phone number pairs of a vast majority of the Snapchat users,” the site said. “This information was acquired through the recently patched Snapchat exploit and is being shared with the public to raise awareness on the issue.”

The last two digits of phone numbers in the database were blurred out to partially protect those on the list, but it appears full phone numbers were available.

[Snapchat] was too reluctant at patching the exploit until they knew it was too late and companies that we trust with our information should be more careful when dealing with it,” SnapchatDB said.

The anonymous person or people behind the database stand behind their actions. “Our motivation behind the release was to raise the public awareness around the issue, and also put public pressure on Snapchat to get this exploit fixed,” SnapchatDB told tech sites including TechCrunch. “It is understandable that tech startups have limited resources but security and privacy should not be a secondary goal. Security matters as much as user experience does.”

The statement went on to detail Snapchat’s security issues which, it says, Snapchat was warned about by Gibson Security.

Snapchat conceded just days before the leak that there were security issues. “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,” the company wrote in a blog post from Dec. 27. “Over the past year we’ve implemented various safeguards to make it more difficult to do. We recently added additional counter-measures and continue to make improvements to combat spam and abuse.”

Snapchat has not made a public statement on the compromised 4.6 million accounts.

Although SnapchatDB is now offline, the leaked information is still available on other sites. Use this checker to find out if your account information is in the database.