Re: Domain Length

From: Bill Gerrard (bill@daze.net)
Date: Tue Jan 11 2000 - 14:33:28 EST


> When will get 255 length domain names per the RFC?

255 is the limit for a name including all "labels" (hostname, SLD, TLD,
etc), so you can already make a name that is 255 characters in
length. The maximum length for a "label" (rfc term) is 63 characters. A
label is the characters between the dots ".", i.e. the second level
domain, a hostname, etc.

Reference: http://info.internet.isi.edu:80/in-notes/rfc/files/rfc1035.txt

Also, quoting RFC2181:

  "The DNS itself places only one restriction on the particular labels
  that can be used to identify resource records. That one restriction
  relates to the length of the label and the full name. The length of
  any one label is limited to between 1 and 63 octets. A full domain
  name is limited to 255 octets (including the separators)."

Reference: http://info.internet.isi.edu:80/in-notes/rfc/files/rfc2181.txt

Regards,
Bill



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