For all other on-base numbers, there is another method if you are calling through Vonage, Skype, Magic Jack (or from the states). From Off Base dial (098) 611-7-LAST 6. This can be used with any DSN on island, but ONLY if calling from an international number.
If you are using a cell phone and need to reach any other number though, you will need to go through the base operators. Just dial the number for the operators, wait until you hear another dial tone, and then dial the 7 digit DSN number:
USMC operator, from Off Base dial (098) 954-5555
Kadena operator, from Off Base dial (098) 938-1111
I keep these last 2 numbers programmed in our cell phones — they’ve come in handy many times. If you keep waiting on the line after the dial tone, you will be connected to an actual operator who can connect you if you do not know the number you need to reach. This is great to have in case you are ever running late for an appointment, need to reach security forces or even track down your spouse.