Outgoing Text to 7727 Picture what is this

Bk2112 wrote:

That's not necessarily accurate. None of these people even know to text it to 7727, It doesn't support that statement. If you use a Particular third-party texting app to send text photos it will send that exact same code. The majority of the time if you're seeing these on your significant others usage details it's not a good thing. They're trying to be sneaky.. Sad but true

What app would use this short code . Do you know???