Johnson City’s 37604 Zip Code Has Been Ranked Seventh Nationally In Realtor.Com’s “America’s Hottest Zip Codes”. The Placement Is Out Of Nearly 30-Thousand Competitors Nationwide. The Area Is Considered A Hotspot Due To Affordability On A National Scale, Relocation, And Opportunities For Aspiring Millennial Homeowners. You Can View The Full Rankings At Realtor.Com