"Or the 16th" if you use the list below as in Dave Workman's article, which excludes Montana as mentioned above where permitless carry is only valid in 99.4% of the state, several cities requiring permits to carry within their boundaries.
https://libertyparkpress.com/sweet-16-ky-joins-15-other-states-with-constitutional-carry/Sweet 16: KY Joins 15 other States with ‘Constitutional Carry’As promised, Kentucky Gov. Matt Bevin has signed legislation to allow citizens over the age of 21 in the Commonwealth to carry a concealed firearm without a permit, bringing the number of states with so-called “Constitutional Carry” to 16.
The law takes effect in July. Bevin is the third governor this year to sign such legislation, the other two being South Dakota Gov. Kristi Noem and Oklahoma Gov. Kevin Stitt. All three are Republicans.
Kentucky has joined Alaska, Arizona, Arkansas, Idaho, Kansas, Maine, Mississippi, Missouri, New Hampshire, North Dakota, Oklahoma, South Dakota, Vermont, West Virginia and Wyoming, [all those states collectively known to Karl Rhoads, Chris Lee, Stanley Chang et al. as "the wild west"...] and gun owners in other states are quietly working toward the same end.