Yes, they can. The area code is given to you due to where you purchased the phone. You can use it anywhere in the world as long as your phone is near a cell phone tower.
The phone number of the History Colorado is: 303-866-3682.
The phone number of the University Of Colorado Museum is: 303-492-6892.
The phone number of the Colorado Railroad Museum is: 303-279-4591.
The phone number of the Colorado Computer Museum is: 970-669-1258.
The phone number of the Colorado History Museum is: 303-866-2138.
The phone number of the Museum Of Northwest Colorado is: 970-824-6360.
The phone number of the Colorado Springs Pioneers Museum is: 719-385-5990.
The phone number of the Museum Of Western Colorado is: 970-242-0971.
The phone number of the Southeastern Colorado Heritage Center is: 719-543-6772.
The phone number of the Gateway Colorado Auto Museum is: 970-931-2895.
The phone number of the Colorado Aquarium Society Inc is: 303-659-8084.
The phone number of the Colorado Sports Hall Of Fame is: 720-258-3888.