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Subnet calculator

Free

Network, broadcast, hosts, mask and wildcard. With step-by-step guide, map, diagnosis and configuration.

Examples: 192.168.1.130/26 · 10.0.0.5 255.255.255.0 · 172.16.0.0/12

192.168.10.128/28

Privada (RFC 1918)/28Class C (historical)

Address map

192.168.10.0/24 holds 16 /28 networks. Yours is number 9. Click another one to explore it.

192.168.10.0192.168.10.255

Inside 192.168.10.128/28

Network 192.168.10.12814 hosts 192.168.10.129 – 192.168.10.142Broadcast 192.168.10.143

192.168.10.128 is the network address: it is not assigned to devices

In binary

Network bits in blue; host bits in orange.

IP192.168.10.12811000000.10101000.00001010.10000000
Mask255.255.255.24011111111.11111111.11111111.11110000
Network192.168.10.12811000000.10101000.00001010.10000000
Broadcast192.168.10.14311000000.10101000.00001010.10001111

Tools

4 /30 subnets of 4 addresses (2 usable hosts each).

#SubnetFirst hostLast hostBroadcast
1192.168.10.128/30192.168.10.129192.168.10.130192.168.10.131
2192.168.10.132/30192.168.10.133192.168.10.134192.168.10.135
3192.168.10.136/30192.168.10.137192.168.10.138192.168.10.139
4192.168.10.140/30192.168.10.141192.168.10.142192.168.10.143