203 (number)

203 (two hundred [and] three) is the natural number following 202 and preceding 204.

In mathematics
203 is the seventh Bell number, giving the number of partitions of a set of size 6. 203 different triangles can be made from three rods with integer lengths of at most 12, and 203 integer squares (not necessarily of unit size) can be found in a staircase-shaped polyomino formed by stacks of unit squares of heights ranging from 1 to 12.

In other fields

 * 203 is the HTTP status code for non-authoritative information, indicating that the request was successful but the enclosed payload has been modified from that of the origin server's 200 (OK) response by a transforming proxy.
 * M203 grenade launcher