This came with a warning from my Telco with the message 'Warning: Suspicious Calling Pattern'
Upon answering there was no response from the caller so I blocked the number.

Same as other post here. Had a 'Warning' with the caller ID, which I've never seen before. I didn't answer, but they left a message. They apparently knew who I was as the message asked if I was <insert my first/last name>. Sound Asian/broken English.