In “865,” Morgan Wallen is downing glasses of Jack Daniel’s to get his former lover off his mind, but it has the opposite effect: Emboldened by the alcohol, he drunk-dials his ex.

Source: Songfacts

The song was originally sent to Wallen as “919” (the area code for Raleigh, North Carolina). He ended up changing it to 865:

“865 is the area code that I use, and if I hear those 3 digits, it takes me back to place or time. It just makes me think of home.