single-character host names

Mike Bernhardt bernhardt at
Wed Feb 25 21:46:34 UTC 2009

I've been looking into the RFCs regarding whether or not single-character
(alpha) host names are allowed or not. RFC 952 says no, but 2181 says that
host names must between 1 and 63 octets in length, which would appear to say

Certainly, several large organizations (Google, Yahoo and CNN, to name 3)
are using at least 1: "m"

So what is the accepted view on this currently? Is there another RFC that
has made it OK now?


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