IPv4 & IPv6 calculator.

Split, merge or subtract networks, or convert an address range to CIDRs.

Up to 256 subnets per page. All 64 results of a 64-subnet split appear together.

One IP family per calculation · no network requests

99.83.128.0/17 → /22

32 CIDRs

1,024 addresses per subnet32,768 addresses totalNetmask 255.255.252.0

Showing 1–32 of 32. Ranges include every address.

#Subnet / WHOISFirst addressLast addressAddresses
199.83.128.0/2299.83.128.099.83.131.2551,024
299.83.132.0/2299.83.132.099.83.135.2551,024
399.83.136.0/2299.83.136.099.83.139.2551,024
499.83.140.0/2299.83.140.099.83.143.2551,024
599.83.144.0/2299.83.144.099.83.147.2551,024
699.83.148.0/2299.83.148.099.83.151.2551,024
799.83.152.0/2299.83.152.099.83.155.2551,024
899.83.156.0/2299.83.156.099.83.159.2551,024
999.83.160.0/2299.83.160.099.83.163.2551,024
1099.83.164.0/2299.83.164.099.83.167.2551,024
1199.83.168.0/2299.83.168.099.83.171.2551,024
1299.83.172.0/2299.83.172.099.83.175.2551,024
1399.83.176.0/2299.83.176.099.83.179.2551,024
1499.83.180.0/2299.83.180.099.83.183.2551,024
1599.83.184.0/2299.83.184.099.83.187.2551,024
1699.83.188.0/2299.83.188.099.83.191.2551,024
1799.83.192.0/2299.83.192.099.83.195.2551,024
1899.83.196.0/2299.83.196.099.83.199.2551,024
1999.83.200.0/2299.83.200.099.83.203.2551,024
2099.83.204.0/2299.83.204.099.83.207.2551,024
2199.83.208.0/2299.83.208.099.83.211.2551,024
2299.83.212.0/2299.83.212.099.83.215.2551,024
2399.83.216.0/2299.83.216.099.83.219.2551,024
2499.83.220.0/2299.83.220.099.83.223.2551,024
2599.83.224.0/2299.83.224.099.83.227.2551,024
2699.83.228.0/2299.83.228.099.83.231.2551,024
2799.83.232.0/2299.83.232.099.83.235.2551,024
2899.83.236.0/2299.83.236.099.83.239.2551,024
2999.83.240.0/2299.83.240.099.83.243.2551,024
3099.83.244.0/2299.83.244.099.83.247.2551,024
3199.83.248.0/2299.83.248.099.83.251.2551,024
3299.83.252.0/2299.83.252.099.83.255.2551,024
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Large splits are paged without generating the full address space. Counts are exact for IPv6. Merge and exclusion inputs accept up to 1,024 blocks and produce at most 8,192 CIDRs. Downloads and copy buttons use the displayed page.