The phone number of the Augustana Observatory is: 309-794-7327.
The phone number of the Rock Island Preservation Society is: 309-786-7917.
The phone number of the Blue Island Historical Society is: 708-371-8546.
The phone number of the Rock Island Technical Society is: 815-273-4013.
The phone number of the Cincinnati Observatory is: 513-321-5186.
The phone number of the Goldendale Observatory is: 509-773-3141.
The phone number of the Lowell Observatory is: 928-774-3358.
The phone number of the Rock Island County Historical Society is: 309-764-8590.
The phone number of the Griffith Observatory is: 323-664-1181.
The phone number of the Friends Of The Observatory is: 213-473-0879.
The phone number of the Chippiannock Cemetery is: 309-788-6622.
The phone number of the Gunnison Valley Observatory is: 970-642-1111.
The phone number of the Mt Washington Observatory is: 603-356-2137.