Sector 22853

From Memory Alpha, the free Star Trek reference.

Sector 22853, along with sector 22055, were sectors of space where the USS Charleston was on missions of deep space exploration in the 2360s, according to a Starfleet report entitled Starship Mission Status. (Star Trek: The Next Generation set decoration)

The assignment of the Charleston was not mentioned on screen, but rather was seen on a viewscreen chart on an observation lounge computer station.