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how can i get the length of maskcode of an ip section by two numbers?

for example i get two numbers 1000 ,1255 from an ip database ,it's an
ip section of some place,
how can i know how length the maskcode is?
such as, 192.168.0.0 - 192.168.0.255 i got 192.168.0.0/24

Feb 28 '06 #1
0 825

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