Starbase 247 is a Federation starbase administered by Starfleet.
In 2370, Fleet Admiral Shanthi was stationed here. After the incident involving the USS Pegasus and an illegal Federation interphase cloaking device, the USS Enterprise-D headed for this starbase where a full inquiry would take place. (TNG: "The Pegasus")
In 2395 of an alternate timeline, Admiral Riker was stationed at Starbase 247. (TNG: "All Good Things...")