[dns-operations] There's obviously no "rule" against this...

[Rodney Joffe]

but I am seeing more and more of it from hosts that tickle my network.

This is, obviously, one of MSN's crawlbots.

I think I recall seeing the same pattern from MSN Messenger hosts.

Remote Host:     65.54.165.42
FQDN:            by1sch4030215.phx.gbl
Date:            Sunday, November 25, 2007
Time:            22:23:28 GMT
Referer:
User Agent:      msnbot/1.0 (+http://search.msn.com/msnbot.htm)