[exim] finding subnet an ip belongs to ..?

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Autor: Gregory Machin
Data:  
Para: exim-user
Assunto: [exim] finding subnet an ip belongs to ..?
Hi my servers are getting spam from the ip's below (rbl's are not
catching them) how can I block the whole ip ranges that these ip's
belong to ? How do I figure out the netmask / Mask Bits .. All the
calculators I have found so far only work for class A,B and C networks ..

67.205.81.186
208.82.113.150
206.222.20.20
196.30.81.82
67.219.109.98
67.205.81.186
206.222.20.20
69.64.49.168
190.84.242.12
208.70.78.91
216.189.6.64
69.51.28.29
69.64.49.168
67.205.81.186
208.82.113.150

Thanks

--
Gregory Machin
CT-Net
www.ct-net.org
greg@???
phone : +27 12 379 3497
fax : +27 12 379 4113
Cell : +27 72 524 8096

humans do not use the address
below its for trapping spam.
spamtrap -imasucker@???