nanog mailing list archives

Re: number of characters in a domain?

From: Stephane Bortzmeyer <bortzmeyer () nic fr>
Date: Sat, 23 Jul 2016 16:01:06 +0200

On Sat, Jul 23, 2016 at 08:35:57AM -0400,
 Jared Mauch <jared () puck nether net> wrote 
 a message of 12 lines which said:

I would consult RFC1035 for the label sizes, but the total length
can include multiple labels up to 255 in length. Check section 2.3.4


On another mailing list, Marc Blanchet noticed the limit in the RFC is
255 octets, not characters, which make a difference if you use IDN :-)