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ip Subnet Mask Cheat Sheet, Cheat Sheet of Computer Systems Networking and Telecommunications

Typology: Cheat Sheet

2020/2021

Uploaded on 04/26/2021

ambau
ambau 🇺🇸

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Subnet Cheat Sheet
Guide to sub-class C blocks
Hosts Netmask Amount of a Class C
/30 4255.255.255.252 1/64
/29 8255.255.255.248 1/32
/28 16 255.255.255.240 1/16
/27 32 255.255.255.224 1/8
/26 64 255.255.255.192 1/4
/24 256 255.255.255.0 1
/23 512 255.255.254.0 2
/22 1024 255.255.252.0 4
/21 2048 255.255.248.0 8
/20 4096 255.255.240.0 16
/19 8192 255.255.224.0 32
/18 16384 255.255.192.0 64
/17 32768 255.255.128.0 128
/16 65536 255.255.0.0 256
/25 -- 2 Subnets -- 126 Hosts/Subnet
Network # IP Range Broadcast
.0 .1-.126 .127
.128 .129-.254 .255 /30 -- 64 Subnets -- 2 Hosts/Subnet
Network # IP Range Broadcast
.0 .1-.2 .3
.4 .5-.6 .7
.8 .9-.10 .11
.12 .13-.14 .15
.16 .17-.18 .19
.20 .21-.22 .23
/26 -- 4 Subnets -- 62 Hosts/Subnet
Network # IP Range Broadcast
.0 .1-.62 .63
.64 .65-.126 .127
.128 .129-.190 .191
.192 .193-.254 .255
/27 -- 8 Subnets -- 30 Hosts/Subnet
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Subnet Cheat Sheet

Guide to sub-class C blocks

Hosts Netmask Amount of a Class C /30 4 255.255.255.252 1/ /29 8 255.255.255.248 1/ /28 16 255.255.255.240 1/ /27 32 255.255.255.224 1/ /26 64 255.255.255.192 1/ /24 256 255.255.255.0 1 /23 512 255.255.254.0 2 /22 1024 255.255.252.0 4 /21 2048 255.255.248.0 8 /20 4096 255.255.240.0 16 /19 8192 255.255.224.0 32 /18 16384 255.255.192.0 64 /17 32768 255.255.128.0 128 /16 65536 255.255.0.0 256

/25 -- 2 Subnets -- 126 Hosts/Subnet Network # IP Range Broadcast .0 .1-.126. .128 .129-.254 .255 (^) /30 -- 64 Subnets -- 2 Hosts/Subnet Network # IP Range Broadcast .0 .1-.2. .4 .5-.6. .8 .9-.10. .12 .13-.14. .16 .17-.18. .20 .21-.22.

/26 -- 4 Subnets -- 62 Hosts/Subnet Network # IP Range Broadcast .0 .1-.62. .64 .65-.126. .128 .129-.190. .192 .193-.254.

/27 -- 8 Subnets -- 30 Hosts/Subnet

Network # IP Range Broadcast

/28 -- 16 Subnets -- 14 Hosts/Subnet

/29 -- 32 Subnets -- 6 Hosts/Subnet