Only in East Texas? More widespread?

[Wilson Gray]

Down home, among black people, when a person is called to by someone
who is out of that person's sight, the person called to responds by
hollering back "[hu:]?!" The caller then hollers back whatever is
relevant: "Where you (at)?" Bring me my tobacco!" "Get in this house!"
"Hand me down my walking cane!"

Is anything like this customary anywhere else?

-Wilson Gray