Sector 15
Sector 15 was a region of space in the Milky Way Galaxy.
After Michael Burnham escaped from NCIA-93 with her adopted brother Spock, the ships that Section 31 had dispatched to pursue the fugitives reported that Sector 15 was clear. (DIS: "Light and Shadows")
During the Whale Probe crisis of 2286, a Starfleet Command Table Operator reported that the sector's monitoring station graphic consolidation display would be put up on the main display. The line mentioning this sector was cut from Star Trek IV: The Voyage Home. [1]