Starbase 621

Starbase 621 was a Federation Starfleet starbase active in the 24th century located near Tzenkethi space. ()

The USS Enterprise (NCC-1701-D) delayed its visit to Starbase 621 in 2370 to assist the. 

In 2374, the USS Honshu (NCC-60205) was en route to Starbase 621 to drop off Gul Dukat to face charges of s, but the ship was destroyed by the Cardassians. 

In the late 2370s, Jason Bartholomew served as an operations officer on Starbase 621. (Star Trek: Pendragon)