Board Thread:Support Requests - Getting Technical/@comment-24577221-20160122032955/@comment-1251315-20160204084731

Most likely it's the Skype browser extension, which thinks any particular combination of numbers are phone numbers. Friend Codes are a hot target for this, Wikia can't do anything about it, you need to report it to Skype and just hope they'll give a damn to fix their broken extension.

I would wholeheartedly recommend you to set up an AbuseFilter that disallows any edits that try to include the Skype number format on the page.