You do realize ANY number can be called from Skype. Plus, it wouldn't have come up as 'Skype' on the Caller ID for a landline-it would come up with that person's user name. (This is coming from someone who uses the software and has also made calls using it)
Answered this call one time, lady said she was calling about a job I applied to, didn't apply to any job, they have been calling back to back ever since. BLOCKED