646-257-2614

I received a call from this number, I didn't picked up, but a guy with a heavy accent (Australian, I believe) left a message with one of those "fantastic opportunities" based on my resume. Didn't leave details, just asked to be called back. It sounds like a SCAM, Isn't it?
Any additional information posted would be great!!!

This guy is checking phone numbers against names for debt collection agencies. If you answer he will let them know you are who is listed on their phone database. Never answer, Never return a call to this number!!!

I like the SCAMS Assoc name Lügen has gave them..hahahaha.

Yeap, you got it.
This is a SCAM.
They make up personal and company names, they just want to check your phone number, and sell the info to debt collector, this is for all the phone numbers reported as to be not responding to collector calls, and number which they have never been able to "Check the information"
Use the usual 2 steps technique.
1- NEVER TAKE a call from an unknown number.
2-TAKE THE NUMBER and check it on the internet thru a google, yahoo, or any other search engine, then read all posts, if no answer is found on the web, THEN STICK TO STEP ONE, NEVER ANSWER OR RETURN any call to unknown numbers

This is the same SCAM coming from NY,NY
Check the postings fro the number 646-808-3838, you'll find a complete list of the tier family of scam numbers
https://800notes.com/Phone.aspx/1-646-808-3838