Regular expression problem?? (numbers, bogus IP's)

  I'm using this expression:
* ^Received.*\[[0-9\.]*([03-9][0-9][0-9]|2[6-9][0-9]|25[6-9])

  Which missed a match on
Received: from mailhost.colgetifbabe.com(alt1.colgetifbabe.com(281.3.22.75)
                                                               ^^^

  I don't see why, what am I missing?

Ralph Lindberg N7BSN       <n7bsn(_at_)callsign(_dot_)net>
RV and Camping FAQ <http://kendaco.telebyte.net/rlindber/rv/>
Just because MS-Window's holds 90% of the market doesn't mean it's
superior.  Remember 90% of all animals are insects.
  A proud member of the Netscum list (http://www.netscum.net)