Looking immediately at his face, I would say Corgi mix, but then the third picture where he's chewing on the rawhide, his legs look quite long and skinny. Wonder what happens when you combine a long-legged dog with a short-legged dog?? Is one dominant over the other?? (Sorry, I know nothing about canine genetics.)
There's also that "scoop" to his waist, which seems rather narrow. I could see him being a basenji-corgi mix.
And this…
I dont' let him off leash. Did once and he took off around the block
… sounds pretty basenji-like.