A simple way: 
my @numbers = (51 .. 249);
while (<FILE>) {
    local $" = "|";
    print "$_\n" for /^([0-9]+\.[0-9]+\t(?:@numbers)\.[0-9]+)/
}

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In reply to Re: How to modify \d in RegEx by JavaFan
in thread How to modify \d in RegEx by Erosia

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