John's voicemail message says "This is. John Winchester, if this is an emergency, please leave a message. If this is in regards to 11-2-83, please leave your present latitude and longitude.". In the live action series, 11-2-83 was the date of the house fire, the he would say "This is John Winchester, if this is an emergency, contact my son, Dean", and the boys' only communication with him was when he'd text them latitude and longitude coordinates for cases.
Jared Padalecki and Jensen Ackles provide a short, live, introduction to the anime series episode which tells the family history explored in the television series season 1 episode of the same name.