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
28.191.123.1 0:0:0:0:0:ffff:1cbf:7b01
28.191.123.2 0:0:0:0:0:ffff:1cbf:7b02
28.191.123.3 0:0:0:0:0:ffff:1cbf:7b03
28.191.123.4 0:0:0:0:0:ffff:1cbf:7b04
28.191.123.5 0:0:0:0:0:ffff:1cbf:7b05
28.191.123.6 0:0:0:0:0:ffff:1cbf:7b06
28.191.123.7 0:0:0:0:0:ffff:1cbf:7b07
28.191.123.8 0:0:0:0:0:ffff:1cbf:7b08
28.191.123.9 0:0:0:0:0:ffff:1cbf:7b09
28.191.123.10 0:0:0:0:0:ffff:1cbf:7b0a
28.191.123.11 0:0:0:0:0:ffff:1cbf:7b0b
28.191.123.12 0:0:0:0:0:ffff:1cbf:7b0c
28.191.123.13 0:0:0:0:0:ffff:1cbf:7b0d
28.191.123.14 0:0:0:0:0:ffff:1cbf:7b0e
28.191.123.15 0:0:0:0:0:ffff:1cbf:7b0f
28.191.123.16 0:0:0:0:0:ffff:1cbf:7b10
28.191.123.17 0:0:0:0:0:ffff:1cbf:7b11
28.191.123.18 0:0:0:0:0:ffff:1cbf:7b12
28.191.123.19 0:0:0:0:0:ffff:1cbf:7b13
28.191.123.20 0:0:0:0:0:ffff:1cbf:7b14
28.191.123.21 0:0:0:0:0:ffff:1cbf:7b15
28.191.123.22 0:0:0:0:0:ffff:1cbf:7b16
28.191.123.23 0:0:0:0:0:ffff:1cbf:7b17
28.191.123.24 0:0:0:0:0:ffff:1cbf:7b18
28.191.123.25 0:0:0:0:0:ffff:1cbf:7b19
28.191.123.26 0:0:0:0:0:ffff:1cbf:7b1a
28.191.123.27 0:0:0:0:0:ffff:1cbf:7b1b
28.191.123.28 0:0:0:0:0:ffff:1cbf:7b1c
28.191.123.29 0:0:0:0:0:ffff:1cbf:7b1d
28.191.123.30 0:0:0:0:0:ffff:1cbf:7b1e
28.191.123.31 0:0:0:0:0:ffff:1cbf:7b1f
28.191.123.32 0:0:0:0:0:ffff:1cbf:7b20
28.191.123.33 0:0:0:0:0:ffff:1cbf:7b21
28.191.123.34 0:0:0:0:0:ffff:1cbf:7b22
28.191.123.35 0:0:0:0:0:ffff:1cbf:7b23
28.191.123.36 0:0:0:0:0:ffff:1cbf:7b24
28.191.123.37 0:0:0:0:0:ffff:1cbf:7b25
28.191.123.38 0:0:0:0:0:ffff:1cbf:7b26
28.191.123.39 0:0:0:0:0:ffff:1cbf:7b27
28.191.123.40 0:0:0:0:0:ffff:1cbf:7b28
28.191.123.41 0:0:0:0:0:ffff:1cbf:7b29
28.191.123.42 0:0:0:0:0:ffff:1cbf:7b2a
28.191.123.43 0:0:0:0:0:ffff:1cbf:7b2b
28.191.123.44 0:0:0:0:0:ffff:1cbf:7b2c
28.191.123.45 0:0:0:0:0:ffff:1cbf:7b2d
28.191.123.46 0:0:0:0:0:ffff:1cbf:7b2e
28.191.123.47 0:0:0:0:0:ffff:1cbf:7b2f
28.191.123.48 0:0:0:0:0:ffff:1cbf:7b30
28.191.123.49 0:0:0:0:0:ffff:1cbf:7b31
28.191.123.50 0:0:0:0:0:ffff:1cbf:7b32
28.191.123.51 0:0:0:0:0:ffff:1cbf:7b33
28.191.123.52 0:0:0:0:0:ffff:1cbf:7b34
28.191.123.53 0:0:0:0:0:ffff:1cbf:7b35
28.191.123.54 0:0:0:0:0:ffff:1cbf:7b36
28.191.123.55 0:0:0:0:0:ffff:1cbf:7b37
28.191.123.56 0:0:0:0:0:ffff:1cbf:7b38
28.191.123.57 0:0:0:0:0:ffff:1cbf:7b39
28.191.123.58 0:0:0:0:0:ffff:1cbf:7b3a
28.191.123.59 0:0:0:0:0:ffff:1cbf:7b3b
28.191.123.60 0:0:0:0:0:ffff:1cbf:7b3c


28.191.123.61 0:0:0:0:0:ffff:1cbf:7b3d
28.191.123.62 0:0:0:0:0:ffff:1cbf:7b3e
28.191.123.63 0:0:0:0:0:ffff:1cbf:7b3f
28.191.123.64 0:0:0:0:0:ffff:1cbf:7b40
28.191.123.65 0:0:0:0:0:ffff:1cbf:7b41
28.191.123.66 0:0:0:0:0:ffff:1cbf:7b42
28.191.123.67 0:0:0:0:0:ffff:1cbf:7b43
28.191.123.68 0:0:0:0:0:ffff:1cbf:7b44
28.191.123.69 0:0:0:0:0:ffff:1cbf:7b45
28.191.123.70 0:0:0:0:0:ffff:1cbf:7b46
28.191.123.71 0:0:0:0:0:ffff:1cbf:7b47
28.191.123.72 0:0:0:0:0:ffff:1cbf:7b48
28.191.123.73 0:0:0:0:0:ffff:1cbf:7b49
28.191.123.74 0:0:0:0:0:ffff:1cbf:7b4a
28.191.123.75 0:0:0:0:0:ffff:1cbf:7b4b
28.191.123.76 0:0:0:0:0:ffff:1cbf:7b4c
28.191.123.77 0:0:0:0:0:ffff:1cbf:7b4d
28.191.123.78 0:0:0:0:0:ffff:1cbf:7b4e
28.191.123.79 0:0:0:0:0:ffff:1cbf:7b4f
28.191.123.80 0:0:0:0:0:ffff:1cbf:7b50
28.191.123.81 0:0:0:0:0:ffff:1cbf:7b51
28.191.123.82 0:0:0:0:0:ffff:1cbf:7b52
28.191.123.83 0:0:0:0:0:ffff:1cbf:7b53
28.191.123.84 0:0:0:0:0:ffff:1cbf:7b54
28.191.123.85 0:0:0:0:0:ffff:1cbf:7b55
28.191.123.86 0:0:0:0:0:ffff:1cbf:7b56
28.191.123.87 0:0:0:0:0:ffff:1cbf:7b57
28.191.123.88 0:0:0:0:0:ffff:1cbf:7b58
28.191.123.89 0:0:0:0:0:ffff:1cbf:7b59
28.191.123.90 0:0:0:0:0:ffff:1cbf:7b5a
28.191.123.91 0:0:0:0:0:ffff:1cbf:7b5b
28.191.123.92 0:0:0:0:0:ffff:1cbf:7b5c
28.191.123.93 0:0:0:0:0:ffff:1cbf:7b5d
28.191.123.94 0:0:0:0:0:ffff:1cbf:7b5e
28.191.123.95 0:0:0:0:0:ffff:1cbf:7b5f
28.191.123.96 0:0:0:0:0:ffff:1cbf:7b60
28.191.123.97 0:0:0:0:0:ffff:1cbf:7b61
28.191.123.98 0:0:0:0:0:ffff:1cbf:7b62
28.191.123.99 0:0:0:0:0:ffff:1cbf:7b63
28.191.123.100 0:0:0:0:0:ffff:1cbf:7b64
28.191.123.101 0:0:0:0:0:ffff:1cbf:7b65
28.191.123.102 0:0:0:0:0:ffff:1cbf:7b66
28.191.123.103 0:0:0:0:0:ffff:1cbf:7b67
28.191.123.104 0:0:0:0:0:ffff:1cbf:7b68
28.191.123.105 0:0:0:0:0:ffff:1cbf:7b69
28.191.123.106 0:0:0:0:0:ffff:1cbf:7b6a
28.191.123.107 0:0:0:0:0:ffff:1cbf:7b6b
28.191.123.108 0:0:0:0:0:ffff:1cbf:7b6c
28.191.123.109 0:0:0:0:0:ffff:1cbf:7b6d
28.191.123.110 0:0:0:0:0:ffff:1cbf:7b6e
28.191.123.111 0:0:0:0:0:ffff:1cbf:7b6f
28.191.123.112 0:0:0:0:0:ffff:1cbf:7b70
28.191.123.113 0:0:0:0:0:ffff:1cbf:7b71
28.191.123.114 0:0:0:0:0:ffff:1cbf:7b72
28.191.123.115 0:0:0:0:0:ffff:1cbf:7b73
28.191.123.116 0:0:0:0:0:ffff:1cbf:7b74
28.191.123.117 0:0:0:0:0:ffff:1cbf:7b75
28.191.123.118 0:0:0:0:0:ffff:1cbf:7b76
28.191.123.119 0:0:0:0:0:ffff:1cbf:7b77
28.191.123.120 0:0:0:0:0:ffff:1cbf:7b78


28.191.123.121 0:0:0:0:0:ffff:1cbf:7b79
28.191.123.122 0:0:0:0:0:ffff:1cbf:7b7a
28.191.123.123 0:0:0:0:0:ffff:1cbf:7b7b
28.191.123.124 0:0:0:0:0:ffff:1cbf:7b7c
28.191.123.125 0:0:0:0:0:ffff:1cbf:7b7d
28.191.123.126 0:0:0:0:0:ffff:1cbf:7b7e
28.191.123.127 0:0:0:0:0:ffff:1cbf:7b7f
28.191.123.128 0:0:0:0:0:ffff:1cbf:7b80
28.191.123.129 0:0:0:0:0:ffff:1cbf:7b81
28.191.123.130 0:0:0:0:0:ffff:1cbf:7b82
28.191.123.131 0:0:0:0:0:ffff:1cbf:7b83
28.191.123.132 0:0:0:0:0:ffff:1cbf:7b84
28.191.123.133 0:0:0:0:0:ffff:1cbf:7b85
28.191.123.134 0:0:0:0:0:ffff:1cbf:7b86
28.191.123.135 0:0:0:0:0:ffff:1cbf:7b87
28.191.123.136 0:0:0:0:0:ffff:1cbf:7b88
28.191.123.137 0:0:0:0:0:ffff:1cbf:7b89
28.191.123.138 0:0:0:0:0:ffff:1cbf:7b8a
28.191.123.139 0:0:0:0:0:ffff:1cbf:7b8b
28.191.123.140 0:0:0:0:0:ffff:1cbf:7b8c
28.191.123.141 0:0:0:0:0:ffff:1cbf:7b8d
28.191.123.142 0:0:0:0:0:ffff:1cbf:7b8e
28.191.123.143 0:0:0:0:0:ffff:1cbf:7b8f
28.191.123.144 0:0:0:0:0:ffff:1cbf:7b90
28.191.123.145 0:0:0:0:0:ffff:1cbf:7b91
28.191.123.146 0:0:0:0:0:ffff:1cbf:7b92
28.191.123.147 0:0:0:0:0:ffff:1cbf:7b93
28.191.123.148 0:0:0:0:0:ffff:1cbf:7b94
28.191.123.149 0:0:0:0:0:ffff:1cbf:7b95
28.191.123.150 0:0:0:0:0:ffff:1cbf:7b96
28.191.123.151 0:0:0:0:0:ffff:1cbf:7b97
28.191.123.152 0:0:0:0:0:ffff:1cbf:7b98
28.191.123.153 0:0:0:0:0:ffff:1cbf:7b99
28.191.123.154 0:0:0:0:0:ffff:1cbf:7b9a
28.191.123.155 0:0:0:0:0:ffff:1cbf:7b9b
28.191.123.156 0:0:0:0:0:ffff:1cbf:7b9c
28.191.123.157 0:0:0:0:0:ffff:1cbf:7b9d
28.191.123.158 0:0:0:0:0:ffff:1cbf:7b9e
28.191.123.159 0:0:0:0:0:ffff:1cbf:7b9f
28.191.123.160 0:0:0:0:0:ffff:1cbf:7ba0
28.191.123.161 0:0:0:0:0:ffff:1cbf:7ba1
28.191.123.162 0:0:0:0:0:ffff:1cbf:7ba2
28.191.123.163 0:0:0:0:0:ffff:1cbf:7ba3
28.191.123.164 0:0:0:0:0:ffff:1cbf:7ba4
28.191.123.165 0:0:0:0:0:ffff:1cbf:7ba5
28.191.123.166 0:0:0:0:0:ffff:1cbf:7ba6
28.191.123.167 0:0:0:0:0:ffff:1cbf:7ba7
28.191.123.168 0:0:0:0:0:ffff:1cbf:7ba8
28.191.123.169 0:0:0:0:0:ffff:1cbf:7ba9
28.191.123.170 0:0:0:0:0:ffff:1cbf:7baa
28.191.123.171 0:0:0:0:0:ffff:1cbf:7bab
28.191.123.172 0:0:0:0:0:ffff:1cbf:7bac
28.191.123.173 0:0:0:0:0:ffff:1cbf:7bad
28.191.123.174 0:0:0:0:0:ffff:1cbf:7bae
28.191.123.175 0:0:0:0:0:ffff:1cbf:7baf
28.191.123.176 0:0:0:0:0:ffff:1cbf:7bb0
28.191.123.177 0:0:0:0:0:ffff:1cbf:7bb1
28.191.123.178 0:0:0:0:0:ffff:1cbf:7bb2
28.191.123.179 0:0:0:0:0:ffff:1cbf:7bb3
28.191.123.180 0:0:0:0:0:ffff:1cbf:7bb4


28.191.123.181 0:0:0:0:0:ffff:1cbf:7bb5
28.191.123.182 0:0:0:0:0:ffff:1cbf:7bb6
28.191.123.183 0:0:0:0:0:ffff:1cbf:7bb7
28.191.123.184 0:0:0:0:0:ffff:1cbf:7bb8
28.191.123.185 0:0:0:0:0:ffff:1cbf:7bb9
28.191.123.186 0:0:0:0:0:ffff:1cbf:7bba
28.191.123.187 0:0:0:0:0:ffff:1cbf:7bbb
28.191.123.188 0:0:0:0:0:ffff:1cbf:7bbc
28.191.123.189 0:0:0:0:0:ffff:1cbf:7bbd
28.191.123.190 0:0:0:0:0:ffff:1cbf:7bbe
28.191.123.191 0:0:0:0:0:ffff:1cbf:7bbf
28.191.123.192 0:0:0:0:0:ffff:1cbf:7bc0
28.191.123.193 0:0:0:0:0:ffff:1cbf:7bc1
28.191.123.194 0:0:0:0:0:ffff:1cbf:7bc2
28.191.123.195 0:0:0:0:0:ffff:1cbf:7bc3
28.191.123.196 0:0:0:0:0:ffff:1cbf:7bc4
28.191.123.197 0:0:0:0:0:ffff:1cbf:7bc5
28.191.123.198 0:0:0:0:0:ffff:1cbf:7bc6
28.191.123.199 0:0:0:0:0:ffff:1cbf:7bc7
28.191.123.200 0:0:0:0:0:ffff:1cbf:7bc8
28.191.123.201 0:0:0:0:0:ffff:1cbf:7bc9
28.191.123.202 0:0:0:0:0:ffff:1cbf:7bca
28.191.123.203 0:0:0:0:0:ffff:1cbf:7bcb
28.191.123.204 0:0:0:0:0:ffff:1cbf:7bcc
28.191.123.205 0:0:0:0:0:ffff:1cbf:7bcd
28.191.123.206 0:0:0:0:0:ffff:1cbf:7bce
28.191.123.207 0:0:0:0:0:ffff:1cbf:7bcf
28.191.123.208 0:0:0:0:0:ffff:1cbf:7bd0
28.191.123.209 0:0:0:0:0:ffff:1cbf:7bd1
28.191.123.210 0:0:0:0:0:ffff:1cbf:7bd2
28.191.123.211 0:0:0:0:0:ffff:1cbf:7bd3
28.191.123.212 0:0:0:0:0:ffff:1cbf:7bd4
28.191.123.213 0:0:0:0:0:ffff:1cbf:7bd5
28.191.123.214 0:0:0:0:0:ffff:1cbf:7bd6
28.191.123.215 0:0:0:0:0:ffff:1cbf:7bd7
28.191.123.216 0:0:0:0:0:ffff:1cbf:7bd8
28.191.123.217 0:0:0:0:0:ffff:1cbf:7bd9
28.191.123.218 0:0:0:0:0:ffff:1cbf:7bda
28.191.123.219 0:0:0:0:0:ffff:1cbf:7bdb
28.191.123.220 0:0:0:0:0:ffff:1cbf:7bdc
28.191.123.221 0:0:0:0:0:ffff:1cbf:7bdd
28.191.123.222 0:0:0:0:0:ffff:1cbf:7bde
28.191.123.223 0:0:0:0:0:ffff:1cbf:7bdf
28.191.123.224 0:0:0:0:0:ffff:1cbf:7be0
28.191.123.225 0:0:0:0:0:ffff:1cbf:7be1
28.191.123.226 0:0:0:0:0:ffff:1cbf:7be2
28.191.123.227 0:0:0:0:0:ffff:1cbf:7be3
28.191.123.228 0:0:0:0:0:ffff:1cbf:7be4
28.191.123.229 0:0:0:0:0:ffff:1cbf:7be5
28.191.123.230 0:0:0:0:0:ffff:1cbf:7be6
28.191.123.231 0:0:0:0:0:ffff:1cbf:7be7
28.191.123.232 0:0:0:0:0:ffff:1cbf:7be8
28.191.123.233 0:0:0:0:0:ffff:1cbf:7be9
28.191.123.234 0:0:0:0:0:ffff:1cbf:7bea
28.191.123.235 0:0:0:0:0:ffff:1cbf:7beb
28.191.123.236 0:0:0:0:0:ffff:1cbf:7bec
28.191.123.237 0:0:0:0:0:ffff:1cbf:7bed
28.191.123.238 0:0:0:0:0:ffff:1cbf:7bee
28.191.123.239 0:0:0:0:0:ffff:1cbf:7bef
28.191.123.240 0:0:0:0:0:ffff:1cbf:7bf0
28.191.123.241 0:0:0:0:0:ffff:1cbf:7bf1
28.191.123.242 0:0:0:0:0:ffff:1cbf:7bf2
28.191.123.243 0:0:0:0:0:ffff:1cbf:7bf3
28.191.123.244 0:0:0:0:0:ffff:1cbf:7bf4
28.191.123.245 0:0:0:0:0:ffff:1cbf:7bf5
28.191.123.246 0:0:0:0:0:ffff:1cbf:7bf6
28.191.123.247 0:0:0:0:0:ffff:1cbf:7bf7
28.191.123.248 0:0:0:0:0:ffff:1cbf:7bf8
28.191.123.249 0:0:0:0:0:ffff:1cbf:7bf9
28.191.123.250 0:0:0:0:0:ffff:1cbf:7bfa
28.191.123.251 0:0:0:0:0:ffff:1cbf:7bfb
28.191.123.252 0:0:0:0:0:ffff:1cbf:7bfc
28.191.123.253 0:0:0:0:0:ffff:1cbf:7bfd
28.191.123.254 0:0:0:0:0:ffff:1cbf:7bfe
28.191.123.255 0:0:0:0:0:ffff:1cbf: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.