Central / Mountain time zone
Current Time in Keystone: 10:12 AM

Keystone Area Codes

Here is the current list of area codes in Keystone, SD. There is currently 1 area code(s) in Keystone. Search all the most up-to-date currently used Keystone area codes below.

Central / Mountain time zone
Current Time in Keystone: 10:12 AM
Area Code State City Timezone
605South DakotaKeystoneCentral / Mountain