156153 Zip -

"You're late," she whispered, her voice sounding like wind through dry leaves. "The 156153 delivery was expected yesterday."

Elias, a veteran clerk at the central sorting hub, stared at the digit string. Post offices in this country used five digits. This had six. It wasn't an international code, and it wasn't a typo he recognized. Yet, the optical scanner had accepted it, humming with a strange, harmonic vibration as the box passed through the laser grid. 156153 zip

A woman approached him. She held out a small, translucent envelope. "You're late," she whispered, her voice sounding like