If not already noted, the continental USA (CONUS) does in fact include Alaska. Alaska is not one of the contiguous states however. CONUS 48 is another story. Maybe it excludes Washington DC?? It more usually referred to excluding offshore US possessions or territories. It may be a term that predates AK and HI becoming states in 1959. In this day and age it is silly to exclude AK and HI as well as other US possessions from shipping when it is so easy to determine the shipping costs and relate that info to the buyer. Some years ago (pre world wide web days) it would not be so easy to do but you only had ads in QST to sell things back then. Yup. It could be that people who say "CONUS only" in ads don't place many ads at all and just think since they see it often that it must be the best way to go. It tells me that they may not be all that bright. Even shipping overseas is not that difficult. If you buy and print the postage for overseas online all that horrible paperwork is done right then. If it is an Ebay sale it all gets automatically filled in as I recall. You do have to hand it to the counter person at the post office. Or at least they say you are supposed to.