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Subnet Table For IPv4 Cheat Sheet by

Subnet Table For IPv4. Expands on "Network Lesson Cheat Sheet by monsieur_h"
network     subnet     ipv4     cidr

Subnet Range - Class A

Type
Hosts
Netm­ask
Hex Value
/1
2048 M
128.0.0.0
80.00.0­0.00
/2
1024 M
192.0.0.0
C0.00.0­0.00
/3
512 M
224.0.0.0
E0.00.0­0.00
/4
256 M
240.0.0.0
F0.00.0­0.00
/5
128 M
248.0.0.0
F8.00.0­0.00
/6
64 M
252.0.0.0
FC.00.0­0.00
/7
32 M
254.0.0.0
FE.00.0­0.00
/8
16 M
255.0.0.0
FF.00.0­0.00
 

Subnet Range - Class B

Type
Host
Netm­ask
Hex Value
/9
8 M
255.12­8.0.0
FF.80.0­0.00
/10
4 M
255.19­2.0.0
FF.C0.0­0.00
/11
2 M
255.22­4.0.0
FF.E0.0­0.00
/12
1024 K
255.24­0.0.0
FF.F0.0­0.00
/13
512 K
255.24­8.0.0
FF.F8.0­0.00
/14
256 K
255.25­2.0.0
FF.FC.0­0.00
/15
128 K
255.25­4.0.0
FF.FE.0­0.00
/16
64 K
255.25­5.0.0
FF.FF.0­0.00
 

Subnet Range - Class C

Type
Hosts
Netm­ask
Hex Value
/17
32 K
255.25­5.128.0
FF.FF.8­0.00
/18
16 K
255.25­5.192.0
FF.FF.C­0.00
/19
8 K
255.25­5.224.0
FF.FF.E­0.00
/20
4 K
255.25­5.240.0
FF.FF.F­0.00
/21
2 K
255.25­5.248.0
FF.FF.F­8.00
/22
1 K
255.25­5.252.0
FF.FF.F­C.00
/23
512
255.25­5.254.0
FF.FF.F­E.00
/24
256
255.25­5.255.0
FF.FF.F­F.00
/25
128
255.25­5.2­55.128
FF.FF.F­F.80
/26
64
255.25­5.2­55.192
FF.FF.F­F.C0
/27
32
255.25­5.2­55.224
FF.FF.F­F.E0
/28
16
255.25­5.2­55.240
FF.FF.F­F.F0
/29
8
255.25­5.2­55.248
FF.FF.F­F.F8
/30
4
255.25­5.2­55.252
FF.FF.F­F.FC
/31
2
255.25­5.2­55.254
FF.FF.F­F.FE
/32
1
255.25­5.2­55.255
FF.FF.F­F.FF

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Comments

DaveChild DaveChild, 08:07 18 Jan 12

Very handy, thanks. I'm always forgetting these when working with IPTables :)

Pete Pete, 13:35 13 Feb 14

Nice format. I would suggest as a possible addition the list of the RFC 1918 addresses in there too (10,x.x.x, 192.168.x.x, etc) because i always forget the other non-routable IP addresses I can use in a lab environment, and EVERYbody uses 10.x.x.x on their intranets.

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