This Is Not Recognizable

[SoloCDM]

What does the following mean?  I know what it is suppose to be, but
this is not recognizable!

named[505]: bad referral (11.38.106.63.in-addr.arpa !<
\003106\00263\007in-addr\004arpa\000\000\012\000\001\192\017\000\006\000\001\000\000\023+\0002\009blackhole\003isi\003edu\000.bmanning.isi.edu)
from [63.106.38.11].53

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*********************************************************************
Signed,
SoloCDM