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I have the following data in my dns file, for my domain...

$ORIGIN mydomain.com.
@       IN      A       208.X.Y.Z
mail    IN      A       208.X.Y.Z
... etc..

what is the @ line, mean? I know what an A record is.. but a host with an ampersand at sign?

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3  
A little nitpicky perhaps but @ is not an ampersand. ;) –  John Gardeniers Nov 12 '09 at 6:40
    
HAHAH oooops :) That's so true .... time to fix that up.. (donno why i said it's an ampersand / & ) .. .... –  Pure.Krome Nov 12 '09 at 22:42
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3 Answers

up vote 19 down vote accepted

RFC 1035 defines the format of a DNS zone file.

... on page 34 you'll find:

@ A free standing @ is used to denote the current origin.

This means that @ is a shortcut for the name defined with $ORIGIN.

You can find more information on $ORIGIN here, which is an excerpt from Pro DNS and BIND, published by Apress.

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It's the root, or in your example it's mydomain.com.

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It's an alias for the zone name itself. In this case, it indicates that the zone name has that address (or mx record, or ...)

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