Why are single letter domain names not allowed?

Stephane Bortzmeyer bortzmeyer at nic.fr
Tue May 17 10:32:56 UTC 2005


On Sat, May 14, 2005 at 11:56:58AM -0500,
 Dan J.S. <me at hyperx.com> wrote 
 a message of 5 lines which said:

> Anyone know why single letter domain names are not allowed?

They are allowed. Nothing in RFC 1034 prevents them, not even
"3.5. Preferred name syntax".

BIND has no problem:

May 17 12:31:55 myriam named[1071]: zone x/IN: loaded serial 2004122101

% dig @localhost AXFR x

; <<>> DiG 9.3.1 <<>> @localhost AXFR x
; (1 server found)
;; global options:  printcmd
x.                      86400   IN      SOA     ...
;; Query time: 23 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue May 17 12:32:22 2005
;; XFR size: 6 records (messages 1)



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