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Author Topic: 1-400 numbers  (Read 2368 times)

Offline Zell

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1-400 numbers
« on: June 16, 2007, 06:04:38 PM »
I read somewhere that 1-400 is a working prefix.  I tried calling a bunch of them and each one gave me a busy signal.  What are they used for?
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Offline Woofcat

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Re: 1-400 numbers
« Reply #1 on: June 16, 2007, 07:26:52 PM »
"400 - ** not used **"

under  "4. Area Codes / North America"

http://massis.lcs.mit.edu/archives/areacodes/how.numbers.are.assigned
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