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312, 213 palendromic area codes in the nation’s largest cities

It’s wild that two of the three biggest cities in the US have palindromic area codes to each other:

312: Chicago

213: Los Angeles

Update 20 years later: How Chicago got 3, 1, and 2 digits in their area code. This blog post explains why Los Angeles, Chicago, Detroit, and New York City all have the digits 1, 2, and 3.

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5 Comments
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Tom Saaristo
22 years ago

So is Detroit, MI 313

Tom Saaristo
22 years ago

Take a look at http://allareacodes.com and you ll see that there are tons of area codes and that practically ever single one has a corresponding palindrome 218 in MN v 812 in IN 208 in ID v 802 in VT 609 in NJ v 906 in MI

Duncan Hill
Duncan Hill
17 years ago

“It’s wild that two of the three biggest cities in the US have palendromic area codes to each other” “i wonder if this was intentional by the area code consortium” 212, 213 and 312 were designed as the shortest to dial on a rotary ‘phone. The number of pulses increases as the population decreases. 907 is Alaska and 808 Hawaii (‘0’ is 10 pulses). -Duncan Hill