Default Masks
Decimal to Binary
Binary to Decimal
Custom Subnet Masks
Address Class
100

77.215.200.51

What is 255.0.0.0?
100

165

What is 10100101?

100

11111111

What is 255?

100

Number of subnets needed: 126

Number of needed useable hosts: 131,070

Network address: 118.0.0.0

What is the total number of subnets?

What is 128?

100

95.0.21.91

What is class A?

200

223.23.223.109

What is 255.255.255.0?

200

92

What is 01011100?

200

10010011

What is 147?

200

Number of subnets needed: 126

Number of needed useable hosts: 131,070

Network address: 118.0.0.0

What is the number of bits borrowed?

What is 7?

200

249.240.80.78

What is class E?

300

189.201.50.1

What is 255.255.0.0?

300

227

What is 11100011?

300

01101011

What is 107?

300

Number of subnets needed: 126

Number of needed useable hosts: 131,070

Network address: 118.0.0.0

What is the total number of useable addresses?

What is 131,070?
300

230.230.45.58

What is class D?

400

10.10.250.1

What is 255.0.0.0?

400

166

What is 10100110?

400

10111010

What is 186?

400

Number of subnets needed: 126

Number of needed useable hosts: 131,070

Network address: 118.0.0.0

What is the total number of host addresses?

What is 131,072?

400

192.14.2.0

What is class C?

500

200.113.123.11

What is 255.255.255.0?

500

179

What is 10110011?

500

01000101

What is 69?

500

Number of subnets needed: 126

Number of needed useable hosts: 131,070

Network address: 118.0.0.0

What is the custom subnet mask?

What is 255.254.0.0?

500

253.250.92.75

What is class E?