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Steve's Subnetting Cheat Sheet

BITS MASK MAX NO. HOSTS MAX NO. SUBNETS
10255.192.0.041943022
11255.224.0.020971506
12255.240.0.0104857414
13255.248.0.052428630
14255.252.0.026214262
15255.254.0.0131070126
16255.255.0.0655534254
17255.255.180.032766510
18255.255.192.0163821022
19255.255.224.081902046
20255.255.240.040944094
21255.255.248.020468190
22255.255.252.0102216382
23255.255.254.051032766
24255.255.255.025465534
25255.255.255.128126131070
26255.255.255.19262262142
27255.255.255.22430524286
28255.255.255.240141048574
29255.255.255.24862097150
30255.255.255.25224194302

hand calc'ed -- use at your own risk
Please report any mistakes. Right click to obtain address.

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