en_tn_condensed/act/08/40.md

Philip appeared at Azotus

There was no indication of Philip's traveling between where he baptized the Ethiopian and Azotus. He just suddenly disappeared along the road to Gaza and reappeared at the town of Azotus.

that region

This refers to the area around the town of Azotus.

to all the cities

"to all the cities in that region"