File of Network Math
Binary Equivalents
0 00000000 64 01000000 128 10000000 192 11000000
1 00000001 65 01000001 129 10000001 193 11000001
2 00000010 66 01000010 130 10000010 194 11000010
3 00000011 67 01000011 131 10000011 195 11000011
4 00000100 68 01000100 132 10000100 196 11000100
5 00000101 69 01000101 133 10000101 197 11000101
6 00000110 70 01000110 134 10000110 198 11000110
7 00000111 71 01000111 135 10000111 199 11000111
8 00001000 72 01001000 136 10001000 200 11001000
9 00001001 73 01001001 137 10001001 201 11001001
10 00001010 74 01001010 138 10001010 202 11001010
11 00001011 75 01001011 139 10001011 203 11001011
12 00001100 76 01001100 140 10001100 204 11001100
13 00001101 77 01001101 141 10001101 205 11001101
14 00001110 78 01001110 142 10001110 206 11001110
15 00001111 79 01001111 143 10001111 207 11001111
16 00010000 80 01010000 144 10010000 208 11010000
17 00010001 81 01010001 145 10010001 209 11010001
18 00010010 82 01010010 146 10010010 210 11010010
19 00010011 83 01010011 147 10010011 211 11010011
20 00010100 84 01010100 148 10010100 212 11010100
21 00010101 85 01010101 149 10010101 213 11010101
22 00010110 86 01010110 150 10010110 214 11010110
23 00010111 87 01010111 151 10010111 215 11010111
24 00011000 88 01011000 152 10011000 216 11011000
25 00011001 89 01011001 153 10011001 217 11011001
26 00011010 90 01011010 154 10011010 218 11011010
27 00011011 91 01011011 155 10011011 219 11011011
28 00011100 92 01011100 156 10011100 220 11011100
29 00011101 93 01011101 157 10011101 221 11011101
30 00011110 94 01011110 158 10011110 222 11011110
31 00011111 95 01011111 159 10011111 223 11011111
32 00100000 96 01100000 160 10100000 224 11100000
33 00100001 97 01100001 161 10100001 225 11100001
34 00100010 98 01100010 162 10100010 226 11100010
35 00100011 99 01100011 163 10100011 227 11100011
36 00100100 100 01100100 164 10100100 228 11100100
37 00100101 101 01100101 165 10100101 229 11100101
38 00100110 102 01100110 166 10100110 230 11100110
39 00100111 103 01100111 167 10100111 231 11100111
40 00101000 104 01101000 168 10101000 232 11101000
41 00101001 105 01101001 169 10101001 233 11101001
42 00101010 106 01101010 170 10101010 234 11101010
43 00101011 107 01101011 171 10101011 235 11101011
44 00101100 108 01101100 172 10101100 236 11101100
45 00101101 109 01101101 173 10101101 237 11101101
46 00101110 110 01101110 174 10101110 238 11101110
47 00101111 111 01101111 175 10101111 239 11101111
48 00110000 112 01110000 176 10110000 240 11110000
49 00110001 113 01110001 177 10110001 241 11110001
50 00110010 114 01110010 178 10110010 242 11110010
51 00110011 115 01110011 179 10110011 243 11110011
52 00110100 116 01110100 180 10110100 244 11110100
53 00110101 117 01110101 181 10110101 245 11110101
54 00110110 118 01110110 182 10110110 246 11110110
55 00110111 119 01110111 183 10110111 247 11110111
56 00111000 120 01111000 184 10111000 248 11111000
57 00111001 121 01111001 185 10111001 249 11111001
58 00111010 122 01111010 186 10111010 250 11111010
59 00111011 123 01111011 187 10111011 251 11111011
60 00111100 124 01111100 188 10111100 252 11111100
61 00111101 125 01111101 189 10111101 253 11111101
62 00111110 126 01111110 190 10111110 254 11111110
63 00111111 127 01111111 191 10111111 255 11111111
Subnets
Notes:
- Number of Subnets - "( )" Refers to the number of effective subnets, since the use of subnet numbers of all 0s or all 1s is highly frowned upon and RFC non-compliant.
- Number of Hosts - Refers to the number of effective hosts, excluding the network and broadcast address.
| Class A | |||
| Network Bits | Subnet Mask | Number of Subnets | Number of Hosts |
| /8 | 255.0.0.0 | 0 | 16777214 |
| /9 | 255.128.0.0 | 2 (0) | 8388606 |
| /10 | 255.192.0.0 | 4 (2) | 4194302 |
| /11 | 255.224.0.0 | 8 (6) | 2097150 |
| /12 | 255.240.0.0 | 16 (14) | 1048574 |
| /13 | 255.248.0.0 | 32 (30) | 524286 |
| /14 | 255.252.0.0 | 64 (62) | 262142 |
| /15 | 255.254.0.0 | 128 (126) | 131070 |
| /16 | 255.255.0.0 | 256 (254) | 65534 |
| /17 | 255.255.128.0 | 512 (510) | 32766 |
| /18 | 255.255.192.0 | 1024 (1022) | 16382 |
| /19 | 255.255.224.0 | 2048 (2046) | 8190 |
| /20 | 255.255.240.0 | 4096 (4094) | 4094 |
| /21 | 255.255.248.0 | 8192 (8190) | 2046 |
| /22 | 255.255.252.0 | 16384 (16382) | 1022 |
| /23 | 255.255.254.0 | 32768 (32766) | 510 |
| /24 | 255.255.255.0 | 65536 (65534) | 254 |
| /25 | 255.255.255.128 | 131072 (131070) | 126 |
| /26 | 255.255.255.192 | 262144 (262142) | 62 |
| /27 | 255.255.255.224 | 524288 (524286) | 30 |
| /28 | 255.255.255.240 | 1048576 (1048574) | 14 |
| /29 | 255.255.255.248 | 2097152 (2097150) | 6 |
| /30 | 255.255.255.252 | 4194304 (4194302) | 2 |
