But that’s not the goofy part. As revealed in Action Comics #252, when Krypton exploded, the chunk of the planet with Argo City on it just floated away, containing thousands of Kryptonian survivors.
No callers are identified. No conversations are recorded. No phone records are kept. Now speak clearly and when you are finished say: 'Go ahead'.
The Silver Age origins of Supergirl’s home of Argo City are admittedly pretty goofy. Even by comic book physics standards, how they explained Supergirl’s birthplace is, to put it mildly, eye-roll ...