IPv4 Subnet Calculator
Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.
private IP (RFC 1918)10.121.128.0/17
network10.121.128.0/17
broadcast10.121.255.255
first host10.121.128.1
last host10.121.255.254
subnet mask255.255.128.0
wildcard0.0.127.255
addresses32,768
usable hosts32,766
classA
ipcalc 10.121.128.0/17
address00001010.01111001.10000000.00000000
subnet mask11111111.11111111.10000000.00000000
network00001010.01111001.10000000.00000000
broadcast00001010.01111001.11111111.11111111
green = network part, grey = host part
hex0x0a798000
decimal175734784
reverse dns0.128.121.10.in-addr.arpa
ipv4-mapped::ffff:a79:8000
/17 split into /27 · 1,024 subnets
close ×| # | network | host range | broadcast |
|---|---|---|---|
| 1 | 10.121.128.0/27 | 10.121.128.1 – 10.121.128.30 | 10.121.128.31 |
| 2 | 10.121.128.32/27 | 10.121.128.33 – 10.121.128.62 | 10.121.128.63 |
| 3 | 10.121.128.64/27 | 10.121.128.65 – 10.121.128.94 | 10.121.128.95 |
| 4 | 10.121.128.96/27 | 10.121.128.97 – 10.121.128.126 | 10.121.128.127 |
| 5 | 10.121.128.128/27 | 10.121.128.129 – 10.121.128.158 | 10.121.128.159 |
| 6 | 10.121.128.160/27 | 10.121.128.161 – 10.121.128.190 | 10.121.128.191 |
| 7 | 10.121.128.192/27 | 10.121.128.193 – 10.121.128.222 | 10.121.128.223 |
| 8 | 10.121.128.224/27 | 10.121.128.225 – 10.121.128.254 | 10.121.128.255 |
| 9 | 10.121.129.0/27 | 10.121.129.1 – 10.121.129.30 | 10.121.129.31 |
| 10 | 10.121.129.32/27 | 10.121.129.33 – 10.121.129.62 | 10.121.129.63 |
| 11 | 10.121.129.64/27 | 10.121.129.65 – 10.121.129.94 | 10.121.129.95 |
| 12 | 10.121.129.96/27 | 10.121.129.97 – 10.121.129.126 | 10.121.129.127 |
| 13 | 10.121.129.128/27 | 10.121.129.129 – 10.121.129.158 | 10.121.129.159 |
| 14 | 10.121.129.160/27 | 10.121.129.161 – 10.121.129.190 | 10.121.129.191 |
| 15 | 10.121.129.192/27 | 10.121.129.193 – 10.121.129.222 | 10.121.129.223 |
| 16 | 10.121.129.224/27 | 10.121.129.225 – 10.121.129.254 | 10.121.129.255 |
| 17 | 10.121.130.0/27 | 10.121.130.1 – 10.121.130.30 | 10.121.130.31 |
| 18 | 10.121.130.32/27 | 10.121.130.33 – 10.121.130.62 | 10.121.130.63 |
| 19 | 10.121.130.64/27 | 10.121.130.65 – 10.121.130.94 | 10.121.130.95 |
| 20 | 10.121.130.96/27 | 10.121.130.97 – 10.121.130.126 | 10.121.130.127 |
| 21 | 10.121.130.128/27 | 10.121.130.129 – 10.121.130.158 | 10.121.130.159 |
| 22 | 10.121.130.160/27 | 10.121.130.161 – 10.121.130.190 | 10.121.130.191 |
| 23 | 10.121.130.192/27 | 10.121.130.193 – 10.121.130.222 | 10.121.130.223 |
| 24 | 10.121.130.224/27 | 10.121.130.225 – 10.121.130.254 | 10.121.130.255 |
| 25 | 10.121.131.0/27 | 10.121.131.1 – 10.121.131.30 | 10.121.131.31 |
| 26 | 10.121.131.32/27 | 10.121.131.33 – 10.121.131.62 | 10.121.131.63 |
| 27 | 10.121.131.64/27 | 10.121.131.65 – 10.121.131.94 | 10.121.131.95 |
| 28 | 10.121.131.96/27 | 10.121.131.97 – 10.121.131.126 | 10.121.131.127 |
| 29 | 10.121.131.128/27 | 10.121.131.129 – 10.121.131.158 | 10.121.131.159 |
| 30 | 10.121.131.160/27 | 10.121.131.161 – 10.121.131.190 | 10.121.131.191 |
| 31 | 10.121.131.192/27 | 10.121.131.193 – 10.121.131.222 | 10.121.131.223 |
| 32 | 10.121.131.224/27 | 10.121.131.225 – 10.121.131.254 | 10.121.131.255 |
| 33 | 10.121.132.0/27 | 10.121.132.1 – 10.121.132.30 | 10.121.132.31 |
| 34 | 10.121.132.32/27 | 10.121.132.33 – 10.121.132.62 | 10.121.132.63 |
| 35 | 10.121.132.64/27 | 10.121.132.65 – 10.121.132.94 | 10.121.132.95 |
| 36 | 10.121.132.96/27 | 10.121.132.97 – 10.121.132.126 | 10.121.132.127 |
| 37 | 10.121.132.128/27 | 10.121.132.129 – 10.121.132.158 | 10.121.132.159 |
| 38 | 10.121.132.160/27 | 10.121.132.161 – 10.121.132.190 | 10.121.132.191 |
| 39 | 10.121.132.192/27 | 10.121.132.193 – 10.121.132.222 | 10.121.132.223 |
| 40 | 10.121.132.224/27 | 10.121.132.225 – 10.121.132.254 | 10.121.132.255 |
| 41 | 10.121.133.0/27 | 10.121.133.1 – 10.121.133.30 | 10.121.133.31 |
| 42 | 10.121.133.32/27 | 10.121.133.33 – 10.121.133.62 | 10.121.133.63 |
| 43 | 10.121.133.64/27 | 10.121.133.65 – 10.121.133.94 | 10.121.133.95 |
| 44 | 10.121.133.96/27 | 10.121.133.97 – 10.121.133.126 | 10.121.133.127 |
| 45 | 10.121.133.128/27 | 10.121.133.129 – 10.121.133.158 | 10.121.133.159 |
| 46 | 10.121.133.160/27 | 10.121.133.161 – 10.121.133.190 | 10.121.133.191 |
| 47 | 10.121.133.192/27 | 10.121.133.193 – 10.121.133.222 | 10.121.133.223 |
| 48 | 10.121.133.224/27 | 10.121.133.225 – 10.121.133.254 | 10.121.133.255 |
| 49 | 10.121.134.0/27 | 10.121.134.1 – 10.121.134.30 | 10.121.134.31 |
| 50 | 10.121.134.32/27 | 10.121.134.33 – 10.121.134.62 | 10.121.134.63 |
| 51 | 10.121.134.64/27 | 10.121.134.65 – 10.121.134.94 | 10.121.134.95 |
| 52 | 10.121.134.96/27 | 10.121.134.97 – 10.121.134.126 | 10.121.134.127 |
| 53 | 10.121.134.128/27 | 10.121.134.129 – 10.121.134.158 | 10.121.134.159 |
| 54 | 10.121.134.160/27 | 10.121.134.161 – 10.121.134.190 | 10.121.134.191 |
| 55 | 10.121.134.192/27 | 10.121.134.193 – 10.121.134.222 | 10.121.134.223 |
| 56 | 10.121.134.224/27 | 10.121.134.225 – 10.121.134.254 | 10.121.134.255 |
| 57 | 10.121.135.0/27 | 10.121.135.1 – 10.121.135.30 | 10.121.135.31 |
| 58 | 10.121.135.32/27 | 10.121.135.33 – 10.121.135.62 | 10.121.135.63 |
| 59 | 10.121.135.64/27 | 10.121.135.65 – 10.121.135.94 | 10.121.135.95 |
| 60 | 10.121.135.96/27 | 10.121.135.97 – 10.121.135.126 | 10.121.135.127 |
| 61 | 10.121.135.128/27 | 10.121.135.129 – 10.121.135.158 | 10.121.135.159 |
| 62 | 10.121.135.160/27 | 10.121.135.161 – 10.121.135.190 | 10.121.135.191 |
| 63 | 10.121.135.192/27 | 10.121.135.193 – 10.121.135.222 | 10.121.135.223 |
| 64 | 10.121.135.224/27 | 10.121.135.225 – 10.121.135.254 | 10.121.135.255 |
| 65 | 10.121.136.0/27 | 10.121.136.1 – 10.121.136.30 | 10.121.136.31 |
| 66 | 10.121.136.32/27 | 10.121.136.33 – 10.121.136.62 | 10.121.136.63 |
| 67 | 10.121.136.64/27 | 10.121.136.65 – 10.121.136.94 | 10.121.136.95 |
| 68 | 10.121.136.96/27 | 10.121.136.97 – 10.121.136.126 | 10.121.136.127 |
| 69 | 10.121.136.128/27 | 10.121.136.129 – 10.121.136.158 | 10.121.136.159 |
| 70 | 10.121.136.160/27 | 10.121.136.161 – 10.121.136.190 | 10.121.136.191 |
| 71 | 10.121.136.192/27 | 10.121.136.193 – 10.121.136.222 | 10.121.136.223 |
| 72 | 10.121.136.224/27 | 10.121.136.225 – 10.121.136.254 | 10.121.136.255 |
| 73 | 10.121.137.0/27 | 10.121.137.1 – 10.121.137.30 | 10.121.137.31 |
| 74 | 10.121.137.32/27 | 10.121.137.33 – 10.121.137.62 | 10.121.137.63 |
| 75 | 10.121.137.64/27 | 10.121.137.65 – 10.121.137.94 | 10.121.137.95 |
| 76 | 10.121.137.96/27 | 10.121.137.97 – 10.121.137.126 | 10.121.137.127 |
| 77 | 10.121.137.128/27 | 10.121.137.129 – 10.121.137.158 | 10.121.137.159 |
| 78 | 10.121.137.160/27 | 10.121.137.161 – 10.121.137.190 | 10.121.137.191 |
| 79 | 10.121.137.192/27 | 10.121.137.193 – 10.121.137.222 | 10.121.137.223 |
| 80 | 10.121.137.224/27 | 10.121.137.225 – 10.121.137.254 | 10.121.137.255 |
| 81 | 10.121.138.0/27 | 10.121.138.1 – 10.121.138.30 | 10.121.138.31 |
| 82 | 10.121.138.32/27 | 10.121.138.33 – 10.121.138.62 | 10.121.138.63 |
| 83 | 10.121.138.64/27 | 10.121.138.65 – 10.121.138.94 | 10.121.138.95 |
| 84 | 10.121.138.96/27 | 10.121.138.97 – 10.121.138.126 | 10.121.138.127 |
| 85 | 10.121.138.128/27 | 10.121.138.129 – 10.121.138.158 | 10.121.138.159 |
| 86 | 10.121.138.160/27 | 10.121.138.161 – 10.121.138.190 | 10.121.138.191 |
| 87 | 10.121.138.192/27 | 10.121.138.193 – 10.121.138.222 | 10.121.138.223 |
| 88 | 10.121.138.224/27 | 10.121.138.225 – 10.121.138.254 | 10.121.138.255 |
| 89 | 10.121.139.0/27 | 10.121.139.1 – 10.121.139.30 | 10.121.139.31 |
| 90 | 10.121.139.32/27 | 10.121.139.33 – 10.121.139.62 | 10.121.139.63 |
| 91 | 10.121.139.64/27 | 10.121.139.65 – 10.121.139.94 | 10.121.139.95 |
| 92 | 10.121.139.96/27 | 10.121.139.97 – 10.121.139.126 | 10.121.139.127 |
| 93 | 10.121.139.128/27 | 10.121.139.129 – 10.121.139.158 | 10.121.139.159 |
| 94 | 10.121.139.160/27 | 10.121.139.161 – 10.121.139.190 | 10.121.139.191 |
| 95 | 10.121.139.192/27 | 10.121.139.193 – 10.121.139.222 | 10.121.139.223 |
| 96 | 10.121.139.224/27 | 10.121.139.225 – 10.121.139.254 | 10.121.139.255 |
| 97 | 10.121.140.0/27 | 10.121.140.1 – 10.121.140.30 | 10.121.140.31 |
| 98 | 10.121.140.32/27 | 10.121.140.33 – 10.121.140.62 | 10.121.140.63 |
| 99 | 10.121.140.64/27 | 10.121.140.65 – 10.121.140.94 | 10.121.140.95 |
| 100 | 10.121.140.96/27 | 10.121.140.97 – 10.121.140.126 | 10.121.140.127 |
| 101 | 10.121.140.128/27 | 10.121.140.129 – 10.121.140.158 | 10.121.140.159 |
| 102 | 10.121.140.160/27 | 10.121.140.161 – 10.121.140.190 | 10.121.140.191 |
| 103 | 10.121.140.192/27 | 10.121.140.193 – 10.121.140.222 | 10.121.140.223 |
| 104 | 10.121.140.224/27 | 10.121.140.225 – 10.121.140.254 | 10.121.140.255 |
| 105 | 10.121.141.0/27 | 10.121.141.1 – 10.121.141.30 | 10.121.141.31 |
| 106 | 10.121.141.32/27 | 10.121.141.33 – 10.121.141.62 | 10.121.141.63 |
| 107 | 10.121.141.64/27 | 10.121.141.65 – 10.121.141.94 | 10.121.141.95 |
| 108 | 10.121.141.96/27 | 10.121.141.97 – 10.121.141.126 | 10.121.141.127 |
| 109 | 10.121.141.128/27 | 10.121.141.129 – 10.121.141.158 | 10.121.141.159 |
| 110 | 10.121.141.160/27 | 10.121.141.161 – 10.121.141.190 | 10.121.141.191 |
| 111 | 10.121.141.192/27 | 10.121.141.193 – 10.121.141.222 | 10.121.141.223 |
| 112 | 10.121.141.224/27 | 10.121.141.225 – 10.121.141.254 | 10.121.141.255 |
| 113 | 10.121.142.0/27 | 10.121.142.1 – 10.121.142.30 | 10.121.142.31 |
| 114 | 10.121.142.32/27 | 10.121.142.33 – 10.121.142.62 | 10.121.142.63 |
| 115 | 10.121.142.64/27 | 10.121.142.65 – 10.121.142.94 | 10.121.142.95 |
| 116 | 10.121.142.96/27 | 10.121.142.97 – 10.121.142.126 | 10.121.142.127 |
| 117 | 10.121.142.128/27 | 10.121.142.129 – 10.121.142.158 | 10.121.142.159 |
| 118 | 10.121.142.160/27 | 10.121.142.161 – 10.121.142.190 | 10.121.142.191 |
| 119 | 10.121.142.192/27 | 10.121.142.193 – 10.121.142.222 | 10.121.142.223 |
| 120 | 10.121.142.224/27 | 10.121.142.225 – 10.121.142.254 | 10.121.142.255 |
| 121 | 10.121.143.0/27 | 10.121.143.1 – 10.121.143.30 | 10.121.143.31 |
| 122 | 10.121.143.32/27 | 10.121.143.33 – 10.121.143.62 | 10.121.143.63 |
| 123 | 10.121.143.64/27 | 10.121.143.65 – 10.121.143.94 | 10.121.143.95 |
| 124 | 10.121.143.96/27 | 10.121.143.97 – 10.121.143.126 | 10.121.143.127 |
| 125 | 10.121.143.128/27 | 10.121.143.129 – 10.121.143.158 | 10.121.143.159 |
| 126 | 10.121.143.160/27 | 10.121.143.161 – 10.121.143.190 | 10.121.143.191 |
| 127 | 10.121.143.192/27 | 10.121.143.193 – 10.121.143.222 | 10.121.143.223 |
| 128 | 10.121.143.224/27 | 10.121.143.225 – 10.121.143.254 | 10.121.143.255 |
| 129 | 10.121.144.0/27 | 10.121.144.1 – 10.121.144.30 | 10.121.144.31 |
| 130 | 10.121.144.32/27 | 10.121.144.33 – 10.121.144.62 | 10.121.144.63 |
| 131 | 10.121.144.64/27 | 10.121.144.65 – 10.121.144.94 | 10.121.144.95 |
| 132 | 10.121.144.96/27 | 10.121.144.97 – 10.121.144.126 | 10.121.144.127 |
| 133 | 10.121.144.128/27 | 10.121.144.129 – 10.121.144.158 | 10.121.144.159 |
| 134 | 10.121.144.160/27 | 10.121.144.161 – 10.121.144.190 | 10.121.144.191 |
| 135 | 10.121.144.192/27 | 10.121.144.193 – 10.121.144.222 | 10.121.144.223 |
| 136 | 10.121.144.224/27 | 10.121.144.225 – 10.121.144.254 | 10.121.144.255 |
| 137 | 10.121.145.0/27 | 10.121.145.1 – 10.121.145.30 | 10.121.145.31 |
| 138 | 10.121.145.32/27 | 10.121.145.33 – 10.121.145.62 | 10.121.145.63 |
| 139 | 10.121.145.64/27 | 10.121.145.65 – 10.121.145.94 | 10.121.145.95 |
| 140 | 10.121.145.96/27 | 10.121.145.97 – 10.121.145.126 | 10.121.145.127 |
| 141 | 10.121.145.128/27 | 10.121.145.129 – 10.121.145.158 | 10.121.145.159 |
| 142 | 10.121.145.160/27 | 10.121.145.161 – 10.121.145.190 | 10.121.145.191 |
| 143 | 10.121.145.192/27 | 10.121.145.193 – 10.121.145.222 | 10.121.145.223 |
| 144 | 10.121.145.224/27 | 10.121.145.225 – 10.121.145.254 | 10.121.145.255 |
| 145 | 10.121.146.0/27 | 10.121.146.1 – 10.121.146.30 | 10.121.146.31 |
| 146 | 10.121.146.32/27 | 10.121.146.33 – 10.121.146.62 | 10.121.146.63 |
| 147 | 10.121.146.64/27 | 10.121.146.65 – 10.121.146.94 | 10.121.146.95 |
| 148 | 10.121.146.96/27 | 10.121.146.97 – 10.121.146.126 | 10.121.146.127 |
| 149 | 10.121.146.128/27 | 10.121.146.129 – 10.121.146.158 | 10.121.146.159 |
| 150 | 10.121.146.160/27 | 10.121.146.161 – 10.121.146.190 | 10.121.146.191 |
| 151 | 10.121.146.192/27 | 10.121.146.193 – 10.121.146.222 | 10.121.146.223 |
| 152 | 10.121.146.224/27 | 10.121.146.225 – 10.121.146.254 | 10.121.146.255 |
| 153 | 10.121.147.0/27 | 10.121.147.1 – 10.121.147.30 | 10.121.147.31 |
| 154 | 10.121.147.32/27 | 10.121.147.33 – 10.121.147.62 | 10.121.147.63 |
| 155 | 10.121.147.64/27 | 10.121.147.65 – 10.121.147.94 | 10.121.147.95 |
| 156 | 10.121.147.96/27 | 10.121.147.97 – 10.121.147.126 | 10.121.147.127 |
| 157 | 10.121.147.128/27 | 10.121.147.129 – 10.121.147.158 | 10.121.147.159 |
| 158 | 10.121.147.160/27 | 10.121.147.161 – 10.121.147.190 | 10.121.147.191 |
| 159 | 10.121.147.192/27 | 10.121.147.193 – 10.121.147.222 | 10.121.147.223 |
| 160 | 10.121.147.224/27 | 10.121.147.225 – 10.121.147.254 | 10.121.147.255 |
| 161 | 10.121.148.0/27 | 10.121.148.1 – 10.121.148.30 | 10.121.148.31 |
| 162 | 10.121.148.32/27 | 10.121.148.33 – 10.121.148.62 | 10.121.148.63 |
| 163 | 10.121.148.64/27 | 10.121.148.65 – 10.121.148.94 | 10.121.148.95 |
| 164 | 10.121.148.96/27 | 10.121.148.97 – 10.121.148.126 | 10.121.148.127 |
| 165 | 10.121.148.128/27 | 10.121.148.129 – 10.121.148.158 | 10.121.148.159 |
| 166 | 10.121.148.160/27 | 10.121.148.161 – 10.121.148.190 | 10.121.148.191 |
| 167 | 10.121.148.192/27 | 10.121.148.193 – 10.121.148.222 | 10.121.148.223 |
| 168 | 10.121.148.224/27 | 10.121.148.225 – 10.121.148.254 | 10.121.148.255 |
| 169 | 10.121.149.0/27 | 10.121.149.1 – 10.121.149.30 | 10.121.149.31 |
| 170 | 10.121.149.32/27 | 10.121.149.33 – 10.121.149.62 | 10.121.149.63 |
| 171 | 10.121.149.64/27 | 10.121.149.65 – 10.121.149.94 | 10.121.149.95 |
| 172 | 10.121.149.96/27 | 10.121.149.97 – 10.121.149.126 | 10.121.149.127 |
| 173 | 10.121.149.128/27 | 10.121.149.129 – 10.121.149.158 | 10.121.149.159 |
| 174 | 10.121.149.160/27 | 10.121.149.161 – 10.121.149.190 | 10.121.149.191 |
| 175 | 10.121.149.192/27 | 10.121.149.193 – 10.121.149.222 | 10.121.149.223 |
| 176 | 10.121.149.224/27 | 10.121.149.225 – 10.121.149.254 | 10.121.149.255 |
| 177 | 10.121.150.0/27 | 10.121.150.1 – 10.121.150.30 | 10.121.150.31 |
| 178 | 10.121.150.32/27 | 10.121.150.33 – 10.121.150.62 | 10.121.150.63 |
| 179 | 10.121.150.64/27 | 10.121.150.65 – 10.121.150.94 | 10.121.150.95 |
| 180 | 10.121.150.96/27 | 10.121.150.97 – 10.121.150.126 | 10.121.150.127 |
| 181 | 10.121.150.128/27 | 10.121.150.129 – 10.121.150.158 | 10.121.150.159 |
| 182 | 10.121.150.160/27 | 10.121.150.161 – 10.121.150.190 | 10.121.150.191 |
| 183 | 10.121.150.192/27 | 10.121.150.193 – 10.121.150.222 | 10.121.150.223 |
| 184 | 10.121.150.224/27 | 10.121.150.225 – 10.121.150.254 | 10.121.150.255 |
| 185 | 10.121.151.0/27 | 10.121.151.1 – 10.121.151.30 | 10.121.151.31 |
| 186 | 10.121.151.32/27 | 10.121.151.33 – 10.121.151.62 | 10.121.151.63 |
| 187 | 10.121.151.64/27 | 10.121.151.65 – 10.121.151.94 | 10.121.151.95 |
| 188 | 10.121.151.96/27 | 10.121.151.97 – 10.121.151.126 | 10.121.151.127 |
| 189 | 10.121.151.128/27 | 10.121.151.129 – 10.121.151.158 | 10.121.151.159 |
| 190 | 10.121.151.160/27 | 10.121.151.161 – 10.121.151.190 | 10.121.151.191 |
| 191 | 10.121.151.192/27 | 10.121.151.193 – 10.121.151.222 | 10.121.151.223 |
| 192 | 10.121.151.224/27 | 10.121.151.225 – 10.121.151.254 | 10.121.151.255 |
| 193 | 10.121.152.0/27 | 10.121.152.1 – 10.121.152.30 | 10.121.152.31 |
| 194 | 10.121.152.32/27 | 10.121.152.33 – 10.121.152.62 | 10.121.152.63 |
| 195 | 10.121.152.64/27 | 10.121.152.65 – 10.121.152.94 | 10.121.152.95 |
| 196 | 10.121.152.96/27 | 10.121.152.97 – 10.121.152.126 | 10.121.152.127 |
| 197 | 10.121.152.128/27 | 10.121.152.129 – 10.121.152.158 | 10.121.152.159 |
| 198 | 10.121.152.160/27 | 10.121.152.161 – 10.121.152.190 | 10.121.152.191 |
| 199 | 10.121.152.192/27 | 10.121.152.193 – 10.121.152.222 | 10.121.152.223 |
| 200 | 10.121.152.224/27 | 10.121.152.225 – 10.121.152.254 | 10.121.152.255 |
| 201 | 10.121.153.0/27 | 10.121.153.1 – 10.121.153.30 | 10.121.153.31 |
| 202 | 10.121.153.32/27 | 10.121.153.33 – 10.121.153.62 | 10.121.153.63 |
| 203 | 10.121.153.64/27 | 10.121.153.65 – 10.121.153.94 | 10.121.153.95 |
| 204 | 10.121.153.96/27 | 10.121.153.97 – 10.121.153.126 | 10.121.153.127 |
| 205 | 10.121.153.128/27 | 10.121.153.129 – 10.121.153.158 | 10.121.153.159 |
| 206 | 10.121.153.160/27 | 10.121.153.161 – 10.121.153.190 | 10.121.153.191 |
| 207 | 10.121.153.192/27 | 10.121.153.193 – 10.121.153.222 | 10.121.153.223 |
| 208 | 10.121.153.224/27 | 10.121.153.225 – 10.121.153.254 | 10.121.153.255 |
| 209 | 10.121.154.0/27 | 10.121.154.1 – 10.121.154.30 | 10.121.154.31 |
| 210 | 10.121.154.32/27 | 10.121.154.33 – 10.121.154.62 | 10.121.154.63 |
| 211 | 10.121.154.64/27 | 10.121.154.65 – 10.121.154.94 | 10.121.154.95 |
| 212 | 10.121.154.96/27 | 10.121.154.97 – 10.121.154.126 | 10.121.154.127 |
| 213 | 10.121.154.128/27 | 10.121.154.129 – 10.121.154.158 | 10.121.154.159 |
| 214 | 10.121.154.160/27 | 10.121.154.161 – 10.121.154.190 | 10.121.154.191 |
| 215 | 10.121.154.192/27 | 10.121.154.193 – 10.121.154.222 | 10.121.154.223 |
| 216 | 10.121.154.224/27 | 10.121.154.225 – 10.121.154.254 | 10.121.154.255 |
| 217 | 10.121.155.0/27 | 10.121.155.1 – 10.121.155.30 | 10.121.155.31 |
| 218 | 10.121.155.32/27 | 10.121.155.33 – 10.121.155.62 | 10.121.155.63 |
| 219 | 10.121.155.64/27 | 10.121.155.65 – 10.121.155.94 | 10.121.155.95 |
| 220 | 10.121.155.96/27 | 10.121.155.97 – 10.121.155.126 | 10.121.155.127 |
| 221 | 10.121.155.128/27 | 10.121.155.129 – 10.121.155.158 | 10.121.155.159 |
| 222 | 10.121.155.160/27 | 10.121.155.161 – 10.121.155.190 | 10.121.155.191 |
| 223 | 10.121.155.192/27 | 10.121.155.193 – 10.121.155.222 | 10.121.155.223 |
| 224 | 10.121.155.224/27 | 10.121.155.225 – 10.121.155.254 | 10.121.155.255 |
| 225 | 10.121.156.0/27 | 10.121.156.1 – 10.121.156.30 | 10.121.156.31 |
| 226 | 10.121.156.32/27 | 10.121.156.33 – 10.121.156.62 | 10.121.156.63 |
| 227 | 10.121.156.64/27 | 10.121.156.65 – 10.121.156.94 | 10.121.156.95 |
| 228 | 10.121.156.96/27 | 10.121.156.97 – 10.121.156.126 | 10.121.156.127 |
| 229 | 10.121.156.128/27 | 10.121.156.129 – 10.121.156.158 | 10.121.156.159 |
| 230 | 10.121.156.160/27 | 10.121.156.161 – 10.121.156.190 | 10.121.156.191 |
| 231 | 10.121.156.192/27 | 10.121.156.193 – 10.121.156.222 | 10.121.156.223 |
| 232 | 10.121.156.224/27 | 10.121.156.225 – 10.121.156.254 | 10.121.156.255 |
| 233 | 10.121.157.0/27 | 10.121.157.1 – 10.121.157.30 | 10.121.157.31 |
| 234 | 10.121.157.32/27 | 10.121.157.33 – 10.121.157.62 | 10.121.157.63 |
| 235 | 10.121.157.64/27 | 10.121.157.65 – 10.121.157.94 | 10.121.157.95 |
| 236 | 10.121.157.96/27 | 10.121.157.97 – 10.121.157.126 | 10.121.157.127 |
| 237 | 10.121.157.128/27 | 10.121.157.129 – 10.121.157.158 | 10.121.157.159 |
| 238 | 10.121.157.160/27 | 10.121.157.161 – 10.121.157.190 | 10.121.157.191 |
| 239 | 10.121.157.192/27 | 10.121.157.193 – 10.121.157.222 | 10.121.157.223 |
| 240 | 10.121.157.224/27 | 10.121.157.225 – 10.121.157.254 | 10.121.157.255 |
| 241 | 10.121.158.0/27 | 10.121.158.1 – 10.121.158.30 | 10.121.158.31 |
| 242 | 10.121.158.32/27 | 10.121.158.33 – 10.121.158.62 | 10.121.158.63 |
| 243 | 10.121.158.64/27 | 10.121.158.65 – 10.121.158.94 | 10.121.158.95 |
| 244 | 10.121.158.96/27 | 10.121.158.97 – 10.121.158.126 | 10.121.158.127 |
| 245 | 10.121.158.128/27 | 10.121.158.129 – 10.121.158.158 | 10.121.158.159 |
| 246 | 10.121.158.160/27 | 10.121.158.161 – 10.121.158.190 | 10.121.158.191 |
| 247 | 10.121.158.192/27 | 10.121.158.193 – 10.121.158.222 | 10.121.158.223 |
| 248 | 10.121.158.224/27 | 10.121.158.225 – 10.121.158.254 | 10.121.158.255 |
| 249 | 10.121.159.0/27 | 10.121.159.1 – 10.121.159.30 | 10.121.159.31 |
| 250 | 10.121.159.32/27 | 10.121.159.33 – 10.121.159.62 | 10.121.159.63 |
| 251 | 10.121.159.64/27 | 10.121.159.65 – 10.121.159.94 | 10.121.159.95 |
| 252 | 10.121.159.96/27 | 10.121.159.97 – 10.121.159.126 | 10.121.159.127 |
| 253 | 10.121.159.128/27 | 10.121.159.129 – 10.121.159.158 | 10.121.159.159 |
| 254 | 10.121.159.160/27 | 10.121.159.161 – 10.121.159.190 | 10.121.159.191 |
| 255 | 10.121.159.192/27 | 10.121.159.193 – 10.121.159.222 | 10.121.159.223 |
| 256 | 10.121.159.224/27 | 10.121.159.225 – 10.121.159.254 | 10.121.159.255 |
showing 256 of 1,024
01 / table
IPv4 CIDR prefix table.
Click a prefix longer than your network to split it into subnets.
| prefix | subnet mask | addresses | hosts | in your /17 |
|---|---|---|---|---|
| /0 | 0.0.0.0 | 4,294,967,296 | 4,294,967,294 | - |
| /1 | 128.0.0.0 | 2,147,483,648 | 2,147,483,646 | - |
| /2 | 192.0.0.0 | 1,073,741,824 | 1,073,741,822 | - |
| /3 | 224.0.0.0 | 536,870,912 | 536,870,910 | - |
| /4 | 240.0.0.0 | 268,435,456 | 268,435,454 | - |
| /5 | 248.0.0.0 | 134,217,728 | 134,217,726 | - |
| /6 | 252.0.0.0 | 67,108,864 | 67,108,862 | - |
| /7 | 254.0.0.0 | 33,554,432 | 33,554,430 | - |
| /8 | 255.0.0.0 | 16,777,216 | 16,777,214 | - |
| /9 | 255.128.0.0 | 8,388,608 | 8,388,606 | - |
| /10 | 255.192.0.0 | 4,194,304 | 4,194,302 | - |
| /11 | 255.224.0.0 | 2,097,152 | 2,097,150 | - |
| /12 | 255.240.0.0 | 1,048,576 | 1,048,574 | - |
| /13 | 255.248.0.0 | 524,288 | 524,286 | - |
| /14 | 255.252.0.0 | 262,144 | 262,142 | - |
| /15 | 255.254.0.0 | 131,072 | 131,070 | - |
| /16 | 255.255.0.0 | 65,536 | 65,534 | - |
| /17 | 255.255.128.0 | 32,768 | 32,766 | 1 |
| /18 | 255.255.192.0 | 16,384 | 16,382 | 2 split → |
| /19 | 255.255.224.0 | 8,192 | 8,190 | 4 split → |
| /20 | 255.255.240.0 | 4,096 | 4,094 | 8 split → |
| /21 | 255.255.248.0 | 2,048 | 2,046 | 16 split → |
| /22 | 255.255.252.0 | 1,024 | 1,022 | 32 split → |
| /23 | 255.255.254.0 | 512 | 510 | 64 split → |
| /24 | 255.255.255.0 | 256 | 254 | 128 split → |
| /25 | 255.255.255.128 | 128 | 126 | 256 split → |
| /26 | 255.255.255.192 | 64 | 62 | 512 split → |
| /27 | 255.255.255.224 | 32 | 30 | 1,024 split → |
| /28 | 255.255.255.240 | 16 | 14 | 2,048 split → |
| /29 | 255.255.255.248 | 8 | 6 | 4,096 split → |
| /30 | 255.255.255.252 | 4 | 2 | 8,192 split → |
| /31 | 255.255.255.254 | 2 | 2 | 16,384 split → |
| /32 | 255.255.255.255 | 1 | 1 | 32,768 split → |
02 / faq
About this calculator.
How do I use this subnet calculator?
▼
Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.
Why are usable hosts always 2 fewer?
▼
The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.
Can I use it from a terminal?
▼
Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.