Not attempting to look like I'm trying to throw shade, but a Google search usually turns up answers to these kinds of questions. I wouldn't know for sure, but it did help a "friend" out a time or two.........
Oh, and Urban Dictionary is pretty good too. If you are going to go there, make sure you have an hour or two to burn......you'll get sucked right in.
"The contiguous United States or officially the conterminous United States consists of the 48 adjoining U.S. states plus Washington, D.C. on the continent of North America." The military defined CONUS as the continental United States before Alaska gained statehood, and the definition/acronym stuck. Last time I checked, Alaska was still in North America.