On Sun, 7 Apr 2013 21:09:26 +0100, sclug at neilzone.co.uk said: > CIDR: 100.64.0.0/10 It's CG-NAT - see http://en.wikipedia.org/wiki/Carrier-grade_NAT#Shared_Address_Space Keith -- "You can't live a perfect day without doing something for someone who will never be able to repay you."