IP addresses and subnets quick reference

IPv4

Prefix:

No. IP addresses:

/30

4

/29

8

/28

16

/27

32

/26

64

/25

128

/24

256

/23

512

/22

1024

/21

2048

/20

4094

/19

8192

/18

16384

/17

32768

/16

65536

 

IPv6

Prefix:

No. IP addresses:

/126

4

/125

8

/124

16

/123

32

/122

64

/121

128

/120

256

/119

512

/118

1024

/117

2048

/116

4094

/115

8192

/114

16384

/113

32768

/112

65536

 

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