Top Definition
Nickname for San Antonio.

Why? The area code is 210 which is a number countdown. Two... One... Zero
I'm from Countdown City!
by derek210 October 11, 2006
Nickname of San Antonio, Texas because of its area code number is 210. Orlando, Florida also has claim to the name because its area code is 321
The area code for Countdown City is 210.
by Alfred O. August 06, 2007

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