Most IAM&AW Member Flight Attendants know how to contact Bob and have never had a problem contacting him when he's not in the air, on an aircraft. 

Almost every IAM&AW Flight Attendant has access to his Mobile Phone Number (315-450-3150)  and now... 
THE ENTIRE IAM&AW MEMBERSHIP!

This area will have additional ways to Contact Bob and useful information as to Bob's whereabouts for his contactability, when you can't reach him immediately.

Click on the LINKS above for that information.