Your A-Za-z should probably have been character classes, i.e. [A-Za-z] (or maybe simply \w, which also includes 0-9 and _ ).  Try 

#!/usr/bin/perl -l

$_ = `nslookup 209.197.123.153`;

print $1 if /name\s*=\s*(([A-Za-z]+\.){2,})/;

__END__
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In reply to Re^3: Need some help with Regex by almut
in thread Need some help with Regex by perlmonk1

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