Find IP IPv4 Network/Subnet and its host address ranges

What is an IPv4 IP address its network and host address ranges?

An IPv4 IP address is an address used in order to uniquely identify a device on an IP network. The address is made up of 32 binary bits, which can be divisible into a network portion and host portion with the help of a subnet mask. The 32 binary bits are broken into four octets (1 octet = 8 bits). Each octet is converted to decimal and separated by a period (dot).

How to Subnet IPv4? Its simple answer is that subnetting is the process of taking a network and splitting it into smaller networks, known as subnets. It's used to free up more public IPv4 addresses and segment networks for security and easier management.
Following are the ranges of IPv4 subnet/network address and their host addresses.

IPv4 AddressIPv6 Address
211.203.123.1 0:0:0:0:0:ffff:d3cb:7b01
211.203.123.2 0:0:0:0:0:ffff:d3cb:7b02
211.203.123.3 0:0:0:0:0:ffff:d3cb:7b03
211.203.123.4 0:0:0:0:0:ffff:d3cb:7b04
211.203.123.5 0:0:0:0:0:ffff:d3cb:7b05
211.203.123.6 0:0:0:0:0:ffff:d3cb:7b06
211.203.123.7 0:0:0:0:0:ffff:d3cb:7b07
211.203.123.8 0:0:0:0:0:ffff:d3cb:7b08
211.203.123.9 0:0:0:0:0:ffff:d3cb:7b09
211.203.123.10 0:0:0:0:0:ffff:d3cb:7b0a
211.203.123.11 0:0:0:0:0:ffff:d3cb:7b0b
211.203.123.12 0:0:0:0:0:ffff:d3cb:7b0c
211.203.123.13 0:0:0:0:0:ffff:d3cb:7b0d
211.203.123.14 0:0:0:0:0:ffff:d3cb:7b0e
211.203.123.15 0:0:0:0:0:ffff:d3cb:7b0f
211.203.123.16 0:0:0:0:0:ffff:d3cb:7b10
211.203.123.17 0:0:0:0:0:ffff:d3cb:7b11
211.203.123.18 0:0:0:0:0:ffff:d3cb:7b12
211.203.123.19 0:0:0:0:0:ffff:d3cb:7b13
211.203.123.20 0:0:0:0:0:ffff:d3cb:7b14
211.203.123.21 0:0:0:0:0:ffff:d3cb:7b15
211.203.123.22 0:0:0:0:0:ffff:d3cb:7b16
211.203.123.23 0:0:0:0:0:ffff:d3cb:7b17
211.203.123.24 0:0:0:0:0:ffff:d3cb:7b18
211.203.123.25 0:0:0:0:0:ffff:d3cb:7b19
211.203.123.26 0:0:0:0:0:ffff:d3cb:7b1a
211.203.123.27 0:0:0:0:0:ffff:d3cb:7b1b
211.203.123.28 0:0:0:0:0:ffff:d3cb:7b1c
211.203.123.29 0:0:0:0:0:ffff:d3cb:7b1d
211.203.123.30 0:0:0:0:0:ffff:d3cb:7b1e
211.203.123.31 0:0:0:0:0:ffff:d3cb:7b1f
211.203.123.32 0:0:0:0:0:ffff:d3cb:7b20
211.203.123.33 0:0:0:0:0:ffff:d3cb:7b21
211.203.123.34 0:0:0:0:0:ffff:d3cb:7b22
211.203.123.35 0:0:0:0:0:ffff:d3cb:7b23
211.203.123.36 0:0:0:0:0:ffff:d3cb:7b24
211.203.123.37 0:0:0:0:0:ffff:d3cb:7b25
211.203.123.38 0:0:0:0:0:ffff:d3cb:7b26
211.203.123.39 0:0:0:0:0:ffff:d3cb:7b27
211.203.123.40 0:0:0:0:0:ffff:d3cb:7b28
211.203.123.41 0:0:0:0:0:ffff:d3cb:7b29
211.203.123.42 0:0:0:0:0:ffff:d3cb:7b2a
211.203.123.43 0:0:0:0:0:ffff:d3cb:7b2b
211.203.123.44 0:0:0:0:0:ffff:d3cb:7b2c
211.203.123.45 0:0:0:0:0:ffff:d3cb:7b2d
211.203.123.46 0:0:0:0:0:ffff:d3cb:7b2e
211.203.123.47 0:0:0:0:0:ffff:d3cb:7b2f
211.203.123.48 0:0:0:0:0:ffff:d3cb:7b30
211.203.123.49 0:0:0:0:0:ffff:d3cb:7b31
211.203.123.50 0:0:0:0:0:ffff:d3cb:7b32
211.203.123.51 0:0:0:0:0:ffff:d3cb:7b33
211.203.123.52 0:0:0:0:0:ffff:d3cb:7b34
211.203.123.53 0:0:0:0:0:ffff:d3cb:7b35
211.203.123.54 0:0:0:0:0:ffff:d3cb:7b36
211.203.123.55 0:0:0:0:0:ffff:d3cb:7b37
211.203.123.56 0:0:0:0:0:ffff:d3cb:7b38
211.203.123.57 0:0:0:0:0:ffff:d3cb:7b39
211.203.123.58 0:0:0:0:0:ffff:d3cb:7b3a
211.203.123.59 0:0:0:0:0:ffff:d3cb:7b3b
211.203.123.60 0:0:0:0:0:ffff:d3cb:7b3c


211.203.123.61 0:0:0:0:0:ffff:d3cb:7b3d
211.203.123.62 0:0:0:0:0:ffff:d3cb:7b3e
211.203.123.63 0:0:0:0:0:ffff:d3cb:7b3f
211.203.123.64 0:0:0:0:0:ffff:d3cb:7b40
211.203.123.65 0:0:0:0:0:ffff:d3cb:7b41
211.203.123.66 0:0:0:0:0:ffff:d3cb:7b42
211.203.123.67 0:0:0:0:0:ffff:d3cb:7b43
211.203.123.68 0:0:0:0:0:ffff:d3cb:7b44
211.203.123.69 0:0:0:0:0:ffff:d3cb:7b45
211.203.123.70 0:0:0:0:0:ffff:d3cb:7b46
211.203.123.71 0:0:0:0:0:ffff:d3cb:7b47
211.203.123.72 0:0:0:0:0:ffff:d3cb:7b48
211.203.123.73 0:0:0:0:0:ffff:d3cb:7b49
211.203.123.74 0:0:0:0:0:ffff:d3cb:7b4a
211.203.123.75 0:0:0:0:0:ffff:d3cb:7b4b
211.203.123.76 0:0:0:0:0:ffff:d3cb:7b4c
211.203.123.77 0:0:0:0:0:ffff:d3cb:7b4d
211.203.123.78 0:0:0:0:0:ffff:d3cb:7b4e
211.203.123.79 0:0:0:0:0:ffff:d3cb:7b4f
211.203.123.80 0:0:0:0:0:ffff:d3cb:7b50
211.203.123.81 0:0:0:0:0:ffff:d3cb:7b51
211.203.123.82 0:0:0:0:0:ffff:d3cb:7b52
211.203.123.83 0:0:0:0:0:ffff:d3cb:7b53
211.203.123.84 0:0:0:0:0:ffff:d3cb:7b54
211.203.123.85 0:0:0:0:0:ffff:d3cb:7b55
211.203.123.86 0:0:0:0:0:ffff:d3cb:7b56
211.203.123.87 0:0:0:0:0:ffff:d3cb:7b57
211.203.123.88 0:0:0:0:0:ffff:d3cb:7b58
211.203.123.89 0:0:0:0:0:ffff:d3cb:7b59
211.203.123.90 0:0:0:0:0:ffff:d3cb:7b5a
211.203.123.91 0:0:0:0:0:ffff:d3cb:7b5b
211.203.123.92 0:0:0:0:0:ffff:d3cb:7b5c
211.203.123.93 0:0:0:0:0:ffff:d3cb:7b5d
211.203.123.94 0:0:0:0:0:ffff:d3cb:7b5e
211.203.123.95 0:0:0:0:0:ffff:d3cb:7b5f
211.203.123.96 0:0:0:0:0:ffff:d3cb:7b60
211.203.123.97 0:0:0:0:0:ffff:d3cb:7b61
211.203.123.98 0:0:0:0:0:ffff:d3cb:7b62
211.203.123.99 0:0:0:0:0:ffff:d3cb:7b63
211.203.123.100 0:0:0:0:0:ffff:d3cb:7b64
211.203.123.101 0:0:0:0:0:ffff:d3cb:7b65
211.203.123.102 0:0:0:0:0:ffff:d3cb:7b66
211.203.123.103 0:0:0:0:0:ffff:d3cb:7b67
211.203.123.104 0:0:0:0:0:ffff:d3cb:7b68
211.203.123.105 0:0:0:0:0:ffff:d3cb:7b69
211.203.123.106 0:0:0:0:0:ffff:d3cb:7b6a
211.203.123.107 0:0:0:0:0:ffff:d3cb:7b6b
211.203.123.108 0:0:0:0:0:ffff:d3cb:7b6c
211.203.123.109 0:0:0:0:0:ffff:d3cb:7b6d
211.203.123.110 0:0:0:0:0:ffff:d3cb:7b6e
211.203.123.111 0:0:0:0:0:ffff:d3cb:7b6f
211.203.123.112 0:0:0:0:0:ffff:d3cb:7b70
211.203.123.113 0:0:0:0:0:ffff:d3cb:7b71
211.203.123.114 0:0:0:0:0:ffff:d3cb:7b72
211.203.123.115 0:0:0:0:0:ffff:d3cb:7b73
211.203.123.116 0:0:0:0:0:ffff:d3cb:7b74
211.203.123.117 0:0:0:0:0:ffff:d3cb:7b75
211.203.123.118 0:0:0:0:0:ffff:d3cb:7b76
211.203.123.119 0:0:0:0:0:ffff:d3cb:7b77
211.203.123.120 0:0:0:0:0:ffff:d3cb:7b78


211.203.123.121 0:0:0:0:0:ffff:d3cb:7b79
211.203.123.122 0:0:0:0:0:ffff:d3cb:7b7a
211.203.123.123 0:0:0:0:0:ffff:d3cb:7b7b
211.203.123.124 0:0:0:0:0:ffff:d3cb:7b7c
211.203.123.125 0:0:0:0:0:ffff:d3cb:7b7d
211.203.123.126 0:0:0:0:0:ffff:d3cb:7b7e
211.203.123.127 0:0:0:0:0:ffff:d3cb:7b7f
211.203.123.128 0:0:0:0:0:ffff:d3cb:7b80
211.203.123.129 0:0:0:0:0:ffff:d3cb:7b81
211.203.123.130 0:0:0:0:0:ffff:d3cb:7b82
211.203.123.131 0:0:0:0:0:ffff:d3cb:7b83
211.203.123.132 0:0:0:0:0:ffff:d3cb:7b84
211.203.123.133 0:0:0:0:0:ffff:d3cb:7b85
211.203.123.134 0:0:0:0:0:ffff:d3cb:7b86
211.203.123.135 0:0:0:0:0:ffff:d3cb:7b87
211.203.123.136 0:0:0:0:0:ffff:d3cb:7b88
211.203.123.137 0:0:0:0:0:ffff:d3cb:7b89
211.203.123.138 0:0:0:0:0:ffff:d3cb:7b8a
211.203.123.139 0:0:0:0:0:ffff:d3cb:7b8b
211.203.123.140 0:0:0:0:0:ffff:d3cb:7b8c
211.203.123.141 0:0:0:0:0:ffff:d3cb:7b8d
211.203.123.142 0:0:0:0:0:ffff:d3cb:7b8e
211.203.123.143 0:0:0:0:0:ffff:d3cb:7b8f
211.203.123.144 0:0:0:0:0:ffff:d3cb:7b90
211.203.123.145 0:0:0:0:0:ffff:d3cb:7b91
211.203.123.146 0:0:0:0:0:ffff:d3cb:7b92
211.203.123.147 0:0:0:0:0:ffff:d3cb:7b93
211.203.123.148 0:0:0:0:0:ffff:d3cb:7b94
211.203.123.149 0:0:0:0:0:ffff:d3cb:7b95
211.203.123.150 0:0:0:0:0:ffff:d3cb:7b96
211.203.123.151 0:0:0:0:0:ffff:d3cb:7b97
211.203.123.152 0:0:0:0:0:ffff:d3cb:7b98
211.203.123.153 0:0:0:0:0:ffff:d3cb:7b99
211.203.123.154 0:0:0:0:0:ffff:d3cb:7b9a
211.203.123.155 0:0:0:0:0:ffff:d3cb:7b9b
211.203.123.156 0:0:0:0:0:ffff:d3cb:7b9c
211.203.123.157 0:0:0:0:0:ffff:d3cb:7b9d
211.203.123.158 0:0:0:0:0:ffff:d3cb:7b9e
211.203.123.159 0:0:0:0:0:ffff:d3cb:7b9f
211.203.123.160 0:0:0:0:0:ffff:d3cb:7ba0
211.203.123.161 0:0:0:0:0:ffff:d3cb:7ba1
211.203.123.162 0:0:0:0:0:ffff:d3cb:7ba2
211.203.123.163 0:0:0:0:0:ffff:d3cb:7ba3
211.203.123.164 0:0:0:0:0:ffff:d3cb:7ba4
211.203.123.165 0:0:0:0:0:ffff:d3cb:7ba5
211.203.123.166 0:0:0:0:0:ffff:d3cb:7ba6
211.203.123.167 0:0:0:0:0:ffff:d3cb:7ba7
211.203.123.168 0:0:0:0:0:ffff:d3cb:7ba8
211.203.123.169 0:0:0:0:0:ffff:d3cb:7ba9
211.203.123.170 0:0:0:0:0:ffff:d3cb:7baa
211.203.123.171 0:0:0:0:0:ffff:d3cb:7bab
211.203.123.172 0:0:0:0:0:ffff:d3cb:7bac
211.203.123.173 0:0:0:0:0:ffff:d3cb:7bad
211.203.123.174 0:0:0:0:0:ffff:d3cb:7bae
211.203.123.175 0:0:0:0:0:ffff:d3cb:7baf
211.203.123.176 0:0:0:0:0:ffff:d3cb:7bb0
211.203.123.177 0:0:0:0:0:ffff:d3cb:7bb1
211.203.123.178 0:0:0:0:0:ffff:d3cb:7bb2
211.203.123.179 0:0:0:0:0:ffff:d3cb:7bb3
211.203.123.180 0:0:0:0:0:ffff:d3cb:7bb4


211.203.123.181 0:0:0:0:0:ffff:d3cb:7bb5
211.203.123.182 0:0:0:0:0:ffff:d3cb:7bb6
211.203.123.183 0:0:0:0:0:ffff:d3cb:7bb7
211.203.123.184 0:0:0:0:0:ffff:d3cb:7bb8
211.203.123.185 0:0:0:0:0:ffff:d3cb:7bb9
211.203.123.186 0:0:0:0:0:ffff:d3cb:7bba
211.203.123.187 0:0:0:0:0:ffff:d3cb:7bbb
211.203.123.188 0:0:0:0:0:ffff:d3cb:7bbc
211.203.123.189 0:0:0:0:0:ffff:d3cb:7bbd
211.203.123.190 0:0:0:0:0:ffff:d3cb:7bbe
211.203.123.191 0:0:0:0:0:ffff:d3cb:7bbf
211.203.123.192 0:0:0:0:0:ffff:d3cb:7bc0
211.203.123.193 0:0:0:0:0:ffff:d3cb:7bc1
211.203.123.194 0:0:0:0:0:ffff:d3cb:7bc2
211.203.123.195 0:0:0:0:0:ffff:d3cb:7bc3
211.203.123.196 0:0:0:0:0:ffff:d3cb:7bc4
211.203.123.197 0:0:0:0:0:ffff:d3cb:7bc5
211.203.123.198 0:0:0:0:0:ffff:d3cb:7bc6
211.203.123.199 0:0:0:0:0:ffff:d3cb:7bc7
211.203.123.200 0:0:0:0:0:ffff:d3cb:7bc8
211.203.123.201 0:0:0:0:0:ffff:d3cb:7bc9
211.203.123.202 0:0:0:0:0:ffff:d3cb:7bca
211.203.123.203 0:0:0:0:0:ffff:d3cb:7bcb
211.203.123.204 0:0:0:0:0:ffff:d3cb:7bcc
211.203.123.205 0:0:0:0:0:ffff:d3cb:7bcd
211.203.123.206 0:0:0:0:0:ffff:d3cb:7bce
211.203.123.207 0:0:0:0:0:ffff:d3cb:7bcf
211.203.123.208 0:0:0:0:0:ffff:d3cb:7bd0
211.203.123.209 0:0:0:0:0:ffff:d3cb:7bd1
211.203.123.210 0:0:0:0:0:ffff:d3cb:7bd2
211.203.123.211 0:0:0:0:0:ffff:d3cb:7bd3
211.203.123.212 0:0:0:0:0:ffff:d3cb:7bd4
211.203.123.213 0:0:0:0:0:ffff:d3cb:7bd5
211.203.123.214 0:0:0:0:0:ffff:d3cb:7bd6
211.203.123.215 0:0:0:0:0:ffff:d3cb:7bd7
211.203.123.216 0:0:0:0:0:ffff:d3cb:7bd8
211.203.123.217 0:0:0:0:0:ffff:d3cb:7bd9
211.203.123.218 0:0:0:0:0:ffff:d3cb:7bda
211.203.123.219 0:0:0:0:0:ffff:d3cb:7bdb
211.203.123.220 0:0:0:0:0:ffff:d3cb:7bdc
211.203.123.221 0:0:0:0:0:ffff:d3cb:7bdd
211.203.123.222 0:0:0:0:0:ffff:d3cb:7bde
211.203.123.223 0:0:0:0:0:ffff:d3cb:7bdf
211.203.123.224 0:0:0:0:0:ffff:d3cb:7be0
211.203.123.225 0:0:0:0:0:ffff:d3cb:7be1
211.203.123.226 0:0:0:0:0:ffff:d3cb:7be2
211.203.123.227 0:0:0:0:0:ffff:d3cb:7be3
211.203.123.228 0:0:0:0:0:ffff:d3cb:7be4
211.203.123.229 0:0:0:0:0:ffff:d3cb:7be5
211.203.123.230 0:0:0:0:0:ffff:d3cb:7be6
211.203.123.231 0:0:0:0:0:ffff:d3cb:7be7
211.203.123.232 0:0:0:0:0:ffff:d3cb:7be8
211.203.123.233 0:0:0:0:0:ffff:d3cb:7be9
211.203.123.234 0:0:0:0:0:ffff:d3cb:7bea
211.203.123.235 0:0:0:0:0:ffff:d3cb:7beb
211.203.123.236 0:0:0:0:0:ffff:d3cb:7bec
211.203.123.237 0:0:0:0:0:ffff:d3cb:7bed
211.203.123.238 0:0:0:0:0:ffff:d3cb:7bee
211.203.123.239 0:0:0:0:0:ffff:d3cb:7bef
211.203.123.240 0:0:0:0:0:ffff:d3cb:7bf0
211.203.123.241 0:0:0:0:0:ffff:d3cb:7bf1
211.203.123.242 0:0:0:0:0:ffff:d3cb:7bf2
211.203.123.243 0:0:0:0:0:ffff:d3cb:7bf3
211.203.123.244 0:0:0:0:0:ffff:d3cb:7bf4
211.203.123.245 0:0:0:0:0:ffff:d3cb:7bf5
211.203.123.246 0:0:0:0:0:ffff:d3cb:7bf6
211.203.123.247 0:0:0:0:0:ffff:d3cb:7bf7
211.203.123.248 0:0:0:0:0:ffff:d3cb:7bf8
211.203.123.249 0:0:0:0:0:ffff:d3cb:7bf9
211.203.123.250 0:0:0:0:0:ffff:d3cb:7bfa
211.203.123.251 0:0:0:0:0:ffff:d3cb:7bfb
211.203.123.252 0:0:0:0:0:ffff:d3cb:7bfc
211.203.123.253 0:0:0:0:0:ffff:d3cb:7bfd
211.203.123.254 0:0:0:0:0:ffff:d3cb:7bfe
211.203.123.255 0:0:0:0:0:ffff:d3cb:7bff


How we got IPv4 subnet masks?

An IPv4 subnet mask consists of 32 bits; it is a sequence of ones (1) followed by a block of zeros (0). The ones indicate bits in the address used for the network prefix and the trailing block of zeros designates that part as being the host identifier.