Received call from this number ... left no message and when I called them back I got a message that the phone numbers call box was full.

Sounds like the usual garbage from a telemarketer.....too bad we can't bill them for our time.

Just received a call from this number and they left no voice mail message.

They just called me. I did not answer but called back. This is what I got........
netline corporation -  provider of performance based solutions
I put netline into google and got this....................
NetLine is a leading provider of targeted and quality leads for B2B Advertisers and Marketers, offering a complete lifecycle approach to lead generation ...

I got a call form this number this morning... no message. I called back and the voicemail message (where I wasn't able to leave a message because the mailbox was full) stated, "Trey Pubb"... spelling could be off...

I received a call to my voicemail and they hung up. I assume this is one of those services that calls to see if it is a valid phone number and a time when you will answer the phone. They can then sell the information to telemarketers. Just guessing....