Postcard Code

The Postcard Code

The code of 221545484848465100503215 is beneath the Semacode on the Perplex City Postcard, does this mean something? This page is going to be used as a workpad for the puzzle.

Images

Postcard Semacode

Theories

• We've tried using numerical translations into Kanji and Hebrew. No luck, though "2210" gives us "SEEK."
• Various ROTing, and conversion to ASCII then ROTing proved...nothing but gibberish.