You can get the phone numbers you need, here.
Ahm, you can get plenty of phone numbers there, and maybe one of them refers you to that answering machine that gives you the right cellphone to call. The section that gives you the information on aircraft arrivals doesn't:
Contact Information:Phone prior to ensure staff availability. On-call Aircraft service outside the established hours (24/7)is available by appointment only, 2 hours advance notice.