In 7.17 The Born-Again Identity Dean's phone number is 785-555-0128.
In 9.02 Devil May Care Kevin answers what is supposedly Dean's previous phone, which he retrieves from a box of spare phones.
Montana's water resources provide for recreation, hydropower, crop and forage irrigation, mining, and water for human consumption.
He eventually stated that it is the number to a prop phone that was used by Jensen on set.
In 2.13 Houses of the Holy Dean's phone is the 2006 Verizon Chocolate.
Dean has owned a Motorola i850, a LH slide phone, and an unidentified flip phone.
As of 6.14 Mannequin 3: The Reckoning, Dean owned a Nokia N78.
The display image seems to be of his legs up on a table.