Presently the default is set to California with the option to put in any zip code and distance to find elsewhere. I will ask them to change this if you like.
KN Community Support
Unfortunately the max distance that you can select is 500 miles. If the default cannot be left open to all posts can they at least add the option to search within "unlimited" miles. At least that way I can type in my zip and by selecting "unlimited" miles I could see all listings.