Subnetting Cheat Sheet

IPv4 SUBNETTING AND SPECIAL IP ADDRESSES

SUBNETTING LESSON              SUBNETTING EXAMPLES

DOWNLOAD SUBNETTING CHEAT SHEET

subnettin-cheat-sheet





CIDRSUBNET MASKADDRESSESWILDCARD MASKClassful IPv4 Addresses
/32255.255.255.25510.0.0.0Class A0.0.0.0 – 127.255.255.255
/31255.255.255.25420.0.0.1Class B128.0.0.0 – 191.255.255.255
/30255.255.255.25240.0.0.3Class C192.0.0.0 – 223.255.255.255
/29255.255.255.24880.0.0.7Class D224.0.0.0 – 239.255.255.255
/28255.255.255.240160.0.0.15Class E240.0.0.0 – 255.255.255.255
/27255.255.255.224320.0.0.31Private IPv4 Addresses
/26255.255.255.192640.0.0.63
/25255.255.255.1281280.0.0.12710.0.0.0 – 10.255.255.255
/24255.255.255.02560.0.0.255172.16.0.0 – 172.31.255.255
/23255.255.254.05120.0.1.255192.168.0.0 – 192.168.255.255
/22255.255.252.010240.0.3.255Special IPv4 Addresses
/21255.255.248.020480.0.7.255
/20255.255.240.040960.0.15.255Local Host127.0.0.0 – 127.255.255.255
/19255.255.224.081920.0.31.255APIPA169.254.0.0 – 169.254.255.255
/18255.255.192.0163840.0.63.255Bogon IPv4 Addresses
/17255.255.128.0327680.0.127.255
/16255.255.0.0655360.0.255.2550.0.0.0/8This network
/15255.254.0.01310720.1.255.25510.0.0.0/8Private IPv4 Block
/14255.252.0.02621440.3.255.255100.64.0.0/10Carrier-grade NAT
/13255.248.0.05242880.7.255.255127.0.0.0/8Loopback
/12255.240.0.010485760.15.255.255127.0.53.53Name collision occuranc
/11255.224.0.020971520.31.255.255169.254.0.0/16Link local
/10255.192.0.041943040.63.255.255172.16.0.0/12Private IPv4 Block
/9255.128.0.083886080.127.255.255192.0.0.0/24IETF Assignments
/8255.0.0.0167772160.255.255.255192.0.2.0/24TEST-NET-1
/7254.0.0.0335544321.255.255.255192.168.0.0/16Private IPv4 Block
/6252.0.0.0671088643.255.255.255198.18.0.0/15Benchmark testing
/5248.0.0.01342177287.255.255.255198.51.100.0/24TEST-NET-2
/4240.0.0.026843545615.255.255.255203.0.113.0/24TEST-NET-3
/3224.0.0.053687091231.255.255.255224.0.0.0/4Multicast
/2192.0.0.0107374182463.255.255.255240.0.0.0/4Reserved
/1128.0.0.02147483648127.255.255.255255.255.255.255/32Limited broadcast
/00.0.0.04294967296255.255.255.255www.ipcisco.com

 

Decimal to Binary Table

DECBİNDECBİNDECBİNDECBİNDECBİNDECBİNDECBİNDECBİN
113310000165100000197110000112910000001161101000011931100000122511100001
2103410001066100001098110001013010000010162101000101941100001022611100010
3113510001167100001199110001113110000011163101000111951100001122711100011
410036100100681000100100110010013210000100164101001001961100010022811100100
510137100101691000101101110010113310000101165101001011971100010122911100101
611038100110701000110102110011013410000110166101001101981100011023011100110
711139100111711000111103110011113510000111167101001111991100011123111100111
8100040101000721001000104110100013610001000168101010002001100100023211101000
9100141101001731001001105110100113710001001169101010012011100100123311101001
10101042101010741001010106110101013810001010170101010102021100101023411101010
11101143101011751001011107110101113910001011171101010112031100101123511101011
12110044101100761001100108110110014010001100172101011002041100110023611101100
13110145101101771001101109110110114110001101173101011012051100110123711101101
14111046101110781001110110110111014210001110174101011102061100111023811101110
15111147101111791001111111110111114310001111175101011112071100111123911101111
161000048110000801010000112111000014410010000176101100002081101000024011110000
171000149110001811010001113111000114510010001177101100012091101000124111110001
181001050110010821010010114111001014610010010178101100102101101001024211110010
191001151110011831010011115111001114710010011179101100112111101001124311110011
201010052110100841010100116111010014810010100180101101002121101010024411110100
211010153110101851010101117111010114910010101181101101012131101010124511110101
221011054110110861010110118111011015010010110182101101102141101011024611110110
231011155110111871010111119111011115110010111183101101112151101011124711110111
241100056111000881011000120111100015210011000184101110002161101100024811111000
251100157111001891011001121111100115310011001185101110012171101100124911111001
261101058111010901011010122111101015410011010186101110102181101101025011111010
271101159111011911011011123111101115510011011187101110112191101101125111111011
281110060111100921011100124111110015610011100188101111002201101110025211111100
291110161111101931011101125111110115710011101189101111012211101110125311111101
301111062111110941011110126111111015810011110190101111102221101111025411111110
311111163111111951011111127111111115910011111191101111112231101111125511111111
3210000064100000096110000012810000000160101000001921100000022411100000256
To determine the 8 bits Octet value, add 0s in front of the binary value. For example: For Decimal 5, the Binary value is 101. 8 bits value is 00000101.

 

OTHER CHEAT SHEETS

 

Subnetting Mask Cheat Sheet

 

In this Subnetting cheat sheet page, you can view all you need about subnetting! You can view CIDR values that is the equivalent valueof your subnet mask, address numbers that can be used with this subnet mask and wildcard masks. You can learn Classful IP Addresses, IPv4 address classes, Private IPv4 blocks. Beside, you can check special IPv4 addresses like Local addresses and APIPA in this Subnetting cheat sheet. The other important thing you will find in this  Subnet mask cheat sheet is Bogon IP Addresses. The decimal to binary table will also help you for your Subnet Calculations.

 

Subnetting is one of the most important and confusing lesson of computer networking. Almost all network engineers, network technicians and network administrators have had difficulties on this lesson. So, always an easy way is tried to be found to determine the correct subnetting mask. To overcome this confusing, I have prepared a perfect Subnetting cheat sheet for you. With this two pages subnetting document, you can easily determine your subnet masks anymore.

 

So, how can you use this Subnetting cheat sheet? First of all, you can use this sheet whenever you forgot any Subnet mask value or even if you need to determine a Subnet Mask for your network. If you do a good calculation, then you do not waste you IPv4 blocks. So, to use your IPv4 blocks effectively, this sheet will help you a lot! You can find the required value and then you can use the corresponding subnet mask in this sheet. It will show you not only the CIDR (Classless Interdomain Routing) value, but also the host addresses and Wildcard Masks.

 

With this Subnet mask cheat sheet, you do not need to use Subnetting Calculator anymore. You can check the network and host values and you can deteremine that which Subnet is useful for you. Without this sheet, you have to use Subnetting Calculator to determine the Subnetting mask, that you will use on your network.

 

You can download this Subnetting cheat sheet  in pdf format. With this Subnetting cheat sheet pdf, you can use this important adn effective document anywhere offline. So, do not forget to download it and keep near with you during your network activities.

Subnetting Practice

 

Subnetting performance can be improved with more Subnetting practices. So, to do this, you should solve different types of Subnetting questions. With this subnetting questions and answers, you see different types of questions and you become ready to the real World subnetting calculations.

For your Subnetting Practice, this Subnet mask cheat sheet will help you a lot. Beside, for your subnetting practice, there is a great page on IPcisco.com. This is Subnetting Practice Page..!

In Subnetting Practice Page, you can find a lot of Subnetting questions and subnetting scenarios about real world. By solving these Subnetting questions, you will be perfect on this important network lesson!

 

Subnetting Lesson

 

If you do not feel comportable about Subnetting, you can learn it easily on Subnetting Lesson of IPCisco.com. Subnetting lesson is in CCNA Course and it teaches you this key lesson with different Subnetting Examples in a short time.

 

Subnetting Video

 

You can also view Subnetting Video for extra Subnetting Examples on Youtube. There is a good subnetting lesson on Youtube that is prepared with Cisco Paket Tracer. With this examples, you can practice subnetting on Youtube also.

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