Received a call this afternoon at 6 PM. Did NOT pick up, called the number back and I am routed to a message stating that the voicemail box is full.

Did not receive a call back but the number is textable, so I texted it. No response.

I'd say it is safe to block.

Got a call from them at the office, asked for two individuals that don't work here, I told him where I was, then he just jumped into his script.  I cut him off and asked him what the address was, he spit out some address that wasn't ours.  I told him that wasn't even our address (his sales pitch was that they would be close by doing pest control) then he just hung up... crappy call center.

Bad connection, could not understand them, told them to call back.. no call back yet

Not sure, they left a message that it is in our best interest to call that # that day, and this was 07-18-2011.