IPv4 SUBNETTING AND SPECIAL IP ADDRESSES
In this Subnetting Cheat Sheet Page, you will find all the possible CIDR, Subnet Mask, Wildcard Mask values for IPv4 Addresses. Beside, you will find private IP addresses, special IP addresses and bogon IP addresses. You can use this subnet cheat sheet online or you can Download Subnetting Cheat Sheet as a pdf file.
CIDR | Subnet | Addresses | Wildcard
| CIDR | SUBNET MASK | ADDRESSES | WILDCARD |
| /32 | 255.255.255.255 | 1 | 0.0.0.0 |
| /31 | 255.255.255.254 | 2 | 0.0.0.1 |
| /30 | 255.255.255.252 | 4 | 0.0.0.3 |
| /29 | 255.255.255.248 | 8 | 0.0.0.7 |
| /28 | 255.255.255.240 | 16 | 0.0.0.15 |
| /27 | 255.255.255.224 | 32 | 0.0.0.31 |
| /26 | 255.255.255.192 | 64 | 0.0.0.63 |
| /25 | 255.255.255.128 | 128 | 0.0.0.127 |
| /24 | 255.255.255.0 | 256 | 0.0.0.255 |
| /23 | 255.255.254.0 | 512 | 0.0.1.255 |
| /22 | 255.255.252.0 | 1024 | 0.0.3.255 |
| /21 | 255.255.248.0 | 2048 | 0.0.7.255 |
| /20 | 255.255.240.0 | 4096 | 0.0.15.255 |
| /19 | 255.255.224.0 | 8192 | 0.0.31.255 |
| /18 | 255.255.192.0 | 16384 | 0.0.63.255 |
| /17 | 255.255.128.0 | 32768 | 0.0.127.255 |
| /16 | 255.255.0.0 | 65536 | 0.0.255.255 |
| /15 | 255.254.0.0 | 131072 | 0.1.255.255 |
| /14 | 255.252.0.0 | 262144 | 0.3.255.255 |
| /13 | 255.248.0.0 | 524288 | 0.7.255.255 |
| /12 | 255.240.0.0 | 1048576 | 0.15.255.255 |
| /11 | 255.224.0.0 | 2097152 | 0.31.255.255 |
| /10 | 255.192.0.0 | 4194304 | 0.63.255.255 |
| /9 | 255.128.0.0 | 8388608 | 0.127.255.255 |
| /8 | 255.0.0.0 | 16777216 | 0.255.255.255 |
| /7 | 254.0.0.0 | 33554432 | 1.255.255.255 |
| /6 | 252.0.0.0 | 67108864 | 3.255.255.255 |
| /5 | 248.0.0.0 | 134217728 | 7.255.255.255 |
| /4 | 240.0.0.0 | 268435456 | 15.255.255.255 |
| /3 | 224.0.0.0 | 536870912 | 31.255.255.255 |
| /2 | 192.0.0.0 | 1073741824 | 63.255.255.255 |
| /1 | 128.0.0.0 | 2147483648 | 127.255.255.255 |
| /0 | 0.0.0.0 | 4294967296 | 255.255.255.255 |
Classful IPv4 Addresses
| Class A | 0.0.0.0 – 127.255.255.255 |
| Class B | 128.0.0.0 – 191.255.255.255 |
| Class C | 192.0.0.0 – 223.255.255.255 |
| Class D | 224.0.0.0 – 239.255.255.255 |
| Class E | 240.0.0.0 – 254.255.255.254 |
Private IPv4 Addresses
| Class A | 10.0.0.0 – 10.255.255.255 |
| Class B | 172.16.0.0 – 172.31.255.255 |
| Class C | 192.168.0.0 – 192.168.255.255 |
Special IPv4 Addresses
| Local Host | 127.0.0.0 – 127.255.255.255 |
| APIPA | 169.254.0.0 – 169.254.255.255 |
Bogon IPv4 Addresses
| 0.0.0.0/8 | This network |
| 10.0.0.0/8 | Private IPv4 Block |
| 100.64.0.0/10 | Carrier-grade NAT |
| 127.0.0.0/8 | Loopback |
| 127.0.53.53 | Name collision occurance |
| 169.254.0.0/16 | Link local |
| 172.16.0.0/12 | Private IPv4 Block |
| 192.0.0.0/24 | IETF Assignments |
| 192.0.2.0/24 | TEST-NET-1 |
| 192.168.0.0/16 | Private IPv4 Block |
| 198.18.0.0/15 | Benchmark testing |
| 198.51.100.0/24 | TEST-NET-2 |
| 203.0.113.0/24 | TEST-NET-3 |
| 224.0.0.0/4 | Multicast |
| 240.0.0.0/4 | Reserved |
| 255.255.255.255/32 | Limited broadcast |
Decimal to Binary Table
| DEC | BIN | DEC | BIN | DEC | BIN | DEC | BIN | DEC | BIN | DEC | BIN | DEC | BIN | DEC | BIN |
| 1 | 1 | 33 | 100001 | 65 | 1000001 | 97 | 1100001 | 129 | 10000001 | 161 | 10100001 | 193 | 11000001 | 225 | 11100001 |
| 2 | 10 | 34 | 100010 | 66 | 1000010 | 98 | 1100010 | 130 | 10000010 | 162 | 10100010 | 194 | 11000010 | 226 | 11100010 |
| 3 | 11 | 35 | 100011 | 67 | 1000011 | 99 | 1100011 | 131 | 10000011 | 163 | 10100011 | 195 | 11000011 | 227 | 11100011 |
| 4 | 100 | 36 | 100100 | 68 | 1000100 | 100 | 1100100 | 132 | 10000100 | 164 | 10100100 | 196 | 11000100 | 228 | 11100100 |
| 5 | 101 | 37 | 100101 | 69 | 1000101 | 101 | 1100101 | 133 | 10000101 | 165 | 10100101 | 197 | 11000101 | 229 | 11100101 |
| 6 | 110 | 38 | 100110 | 70 | 1000110 | 102 | 1100110 | 134 | 10000110 | 166 | 10100110 | 198 | 11000110 | 230 | 11100110 |
| 7 | 111 | 39 | 100111 | 71 | 1000111 | 103 | 1100111 | 135 | 10000111 | 167 | 10100111 | 199 | 11000111 | 231 | 11100111 |
| 8 | 1000 | 40 | 101000 | 72 | 1001000 | 104 | 1101000 | 136 | 10001000 | 168 | 10101000 | 200 | 11001000 | 232 | 11101000 |
| 9 | 1001 | 41 | 101001 | 73 | 1001001 | 105 | 1101001 | 137 | 10001001 | 169 | 10101001 | 201 | 11001001 | 233 | 11101001 |
| 10 | 1010 | 42 | 101010 | 74 | 1001010 | 106 | 1101010 | 138 | 10001010 | 170 | 10101010 | 202 | 11001010 | 234 | 11101010 |
| 11 | 1011 | 43 | 101011 | 75 | 1001011 | 107 | 1101011 | 139 | 10001011 | 171 | 10101011 | 203 | 11001011 | 235 | 11101011 |
| 12 | 1100 | 44 | 101100 | 76 | 1001100 | 108 | 1101100 | 140 | 10001100 | 172 | 10101100 | 204 | 11001100 | 236 | 11101100 |
| 13 | 1101 | 45 | 101101 | 77 | 1001101 | 109 | 1101101 | 141 | 10001101 | 173 | 10101101 | 205 | 11001101 | 237 | 11101101 |
| 14 | 1110 | 46 | 101110 | 78 | 1001110 | 110 | 1101110 | 142 | 10001110 | 174 | 10101110 | 206 | 11001110 | 238 | 11101110 |
| 15 | 1111 | 47 | 101111 | 79 | 1001111 | 111 | 1101111 | 143 | 10001111 | 175 | 10101111 | 207 | 11001111 | 239 | 11101111 |
| 16 | 10000 | 48 | 110000 | 80 | 1010000 | 112 | 1110000 | 144 | 10010000 | 176 | 10110000 | 208 | 11010000 | 240 | 11110000 |
| 17 | 10001 | 49 | 110001 | 81 | 1010001 | 113 | 1110001 | 145 | 10010001 | 177 | 10110001 | 209 | 11010001 | 241 | 11110001 |
| 18 | 10010 | 50 | 110010 | 82 | 1010010 | 114 | 1110010 | 146 | 10010010 | 178 | 10110010 | 210 | 11010010 | 242 | 11110010 |
| 19 | 10011 | 51 | 110011 | 83 | 1010011 | 115 | 1110011 | 147 | 10010011 | 179 | 10110011 | 211 | 11010011 | 243 | 11110011 |
| 20 | 10100 | 52 | 110100 | 84 | 1010100 | 116 | 1110100 | 148 | 10010100 | 180 | 10110100 | 212 | 11010100 | 244 | 11110100 |
| 21 | 10101 | 53 | 110101 | 85 | 1010101 | 117 | 1110101 | 149 | 10010101 | 181 | 10110101 | 213 | 11010101 | 245 | 11110101 |
| 22 | 10110 | 54 | 110110 | 86 | 1010110 | 118 | 1110110 | 150 | 10010110 | 182 | 10110110 | 214 | 11010110 | 246 | 11110110 |
| 23 | 10111 | 55 | 110111 | 87 | 1010111 | 119 | 1110111 | 151 | 10010111 | 183 | 10110111 | 215 | 11010111 | 247 | 11110111 |
| 24 | 11000 | 56 | 111000 | 88 | 1011000 | 120 | 1111000 | 152 | 10011000 | 184 | 10111000 | 216 | 11011000 | 248 | 11111000 |
| 25 | 11001 | 57 | 111001 | 89 | 1011001 | 121 | 1111001 | 153 | 10011001 | 185 | 10111001 | 217 | 11011001 | 249 | 11111001 |
| 26 | 11010 | 58 | 111010 | 90 | 1011010 | 122 | 1111010 | 154 | 10011010 | 186 | 10111010 | 218 | 11011010 | 250 | 11111010 |
| 27 | 11011 | 59 | 111011 | 91 | 1011011 | 123 | 1111011 | 155 | 10011011 | 187 | 10111011 | 219 | 11011011 | 251 | 11111011 |
| 28 | 11100 | 60 | 111100 | 92 | 1011100 | 124 | 1111100 | 156 | 10011100 | 188 | 10111100 | 220 | 11011100 | 252 | 11111100 |
| 29 | 11101 | 61 | 111101 | 93 | 1011101 | 125 | 1111101 | 157 | 10011101 | 189 | 10111101 | 221 | 11011101 | 253 | 11111101 |
| 30 | 11110 | 62 | 111110 | 94 | 1011110 | 126 | 1111110 | 158 | 10011110 | 190 | 10111110 | 222 | 11011110 | 254 | 11111110 |
| 31 | 11111 | 63 | 111111 | 95 | 1011111 | 127 | 1111111 | 159 | 10011111 | 191 | 10111111 | 223 | 11011111 | 255 | 11111111 |
| 32 | 100000 | 64 | 1000000 | 96 | 1100000 | 128 | 10000000 | 160 | 10100000 | 192 | 11000000 | 224 | 11100000 | 256 | 100000000 |
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.
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 Lessons
If you do not feel comportable about this lesson, to make subnetting easy you can learn it easily on Subnetting Lesson of IPCisco.com. Subnetting lesson is included in Lessons of CCNA Course and it teaches you this key lesson with different Subnetting Examples in a short time. By solving different examples on ip subnetting, you can easily learn this lesson. If you learn this lesson good, oyu will be ready to the questions of certification exams and you will be good on ip addressing in network operations.
Subnetting Video
You can also view Subnetting Video for extra Subnetting Examples on Youtube. There are differetn subnetting examples are explained in different videos on youtube by IPCisco. You can both watch them on youtube or on youtube shorts. One of these vides is prepared with Cisco Paket Tracer. With this examples, you can practice subnetting on Youtube also.
Why It is Important?
There are some key lessons in networking. If you learn these key network lessons, you will learn some of the other lessons easily. Subnetting is one of these lessons. If you would like to be good at on ip addressing, you should learn this lesson good. During your studying journey, we have prepare this subnet cheat sheet for you to access and check if you do not remember any point about it. Or, you can remember and know the lesson but you want to double check with this cheat sheet. You can use this page any time oyu want on this improtant lesson of networking.
good study material
Thank you very much Rinki, enjoy ;)
Very much useful material for absolute beginner in Network field.
Thank you.
Thank you very much! You are welcome Teena ;)
Thanks!
Always welcome Ahmed ;) Enjoy!
Very good material to solve all subnetting issues.
Thank you Ibrahim:) Enyoj!
thank you so much Sr
Always welcome Elie ;)