Just for everybodies info, this number traces back to JOB.COM  .

We called them back blocking the number using *67  "*674172133021", but upon answering they knew my girlfriends first name and asked for her by name, before we said anything. It was her phone receiving the call.

this means they have access to the telephone providers backbone network that exchanges your phone number info even when you block it from the general publics view on caller id with the *67.
She had just recently submitted a job app on that site and here we are, spam calls.

Heres their trace info if you wanna follow up folks.
Administrative:
Job.com Inc.
Network Administrator
100 Riverside Parkway Suite 201
Fredericksburg, VA 22406 US
540-374-5681

if you call the number itself back, the 417-213-3021, when they answer tell them to "remove you from their calling list, and place me on the national do not call list, this call was recorded.". That will have to be done by law.

cheers! :-)