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
126.123.43.1 0:0:0:0:0:ffff:7e7b:2b01
126.123.43.2 0:0:0:0:0:ffff:7e7b:2b02
126.123.43.3 0:0:0:0:0:ffff:7e7b:2b03
126.123.43.4 0:0:0:0:0:ffff:7e7b:2b04
126.123.43.5 0:0:0:0:0:ffff:7e7b:2b05
126.123.43.6 0:0:0:0:0:ffff:7e7b:2b06
126.123.43.7 0:0:0:0:0:ffff:7e7b:2b07
126.123.43.8 0:0:0:0:0:ffff:7e7b:2b08
126.123.43.9 0:0:0:0:0:ffff:7e7b:2b09
126.123.43.10 0:0:0:0:0:ffff:7e7b:2b0a
126.123.43.11 0:0:0:0:0:ffff:7e7b:2b0b
126.123.43.12 0:0:0:0:0:ffff:7e7b:2b0c
126.123.43.13 0:0:0:0:0:ffff:7e7b:2b0d
126.123.43.14 0:0:0:0:0:ffff:7e7b:2b0e
126.123.43.15 0:0:0:0:0:ffff:7e7b:2b0f
126.123.43.16 0:0:0:0:0:ffff:7e7b:2b10
126.123.43.17 0:0:0:0:0:ffff:7e7b:2b11
126.123.43.18 0:0:0:0:0:ffff:7e7b:2b12
126.123.43.19 0:0:0:0:0:ffff:7e7b:2b13
126.123.43.20 0:0:0:0:0:ffff:7e7b:2b14
126.123.43.21 0:0:0:0:0:ffff:7e7b:2b15
126.123.43.22 0:0:0:0:0:ffff:7e7b:2b16
126.123.43.23 0:0:0:0:0:ffff:7e7b:2b17
126.123.43.24 0:0:0:0:0:ffff:7e7b:2b18
126.123.43.25 0:0:0:0:0:ffff:7e7b:2b19
126.123.43.26 0:0:0:0:0:ffff:7e7b:2b1a
126.123.43.27 0:0:0:0:0:ffff:7e7b:2b1b
126.123.43.28 0:0:0:0:0:ffff:7e7b:2b1c
126.123.43.29 0:0:0:0:0:ffff:7e7b:2b1d
126.123.43.30 0:0:0:0:0:ffff:7e7b:2b1e
126.123.43.31 0:0:0:0:0:ffff:7e7b:2b1f
126.123.43.32 0:0:0:0:0:ffff:7e7b:2b20
126.123.43.33 0:0:0:0:0:ffff:7e7b:2b21
126.123.43.34 0:0:0:0:0:ffff:7e7b:2b22
126.123.43.35 0:0:0:0:0:ffff:7e7b:2b23
126.123.43.36 0:0:0:0:0:ffff:7e7b:2b24
126.123.43.37 0:0:0:0:0:ffff:7e7b:2b25
126.123.43.38 0:0:0:0:0:ffff:7e7b:2b26
126.123.43.39 0:0:0:0:0:ffff:7e7b:2b27
126.123.43.40 0:0:0:0:0:ffff:7e7b:2b28
126.123.43.41 0:0:0:0:0:ffff:7e7b:2b29
126.123.43.42 0:0:0:0:0:ffff:7e7b:2b2a
126.123.43.43 0:0:0:0:0:ffff:7e7b:2b2b
126.123.43.44 0:0:0:0:0:ffff:7e7b:2b2c
126.123.43.45 0:0:0:0:0:ffff:7e7b:2b2d
126.123.43.46 0:0:0:0:0:ffff:7e7b:2b2e
126.123.43.47 0:0:0:0:0:ffff:7e7b:2b2f
126.123.43.48 0:0:0:0:0:ffff:7e7b:2b30
126.123.43.49 0:0:0:0:0:ffff:7e7b:2b31
126.123.43.50 0:0:0:0:0:ffff:7e7b:2b32
126.123.43.51 0:0:0:0:0:ffff:7e7b:2b33
126.123.43.52 0:0:0:0:0:ffff:7e7b:2b34
126.123.43.53 0:0:0:0:0:ffff:7e7b:2b35
126.123.43.54 0:0:0:0:0:ffff:7e7b:2b36
126.123.43.55 0:0:0:0:0:ffff:7e7b:2b37
126.123.43.56 0:0:0:0:0:ffff:7e7b:2b38
126.123.43.57 0:0:0:0:0:ffff:7e7b:2b39
126.123.43.58 0:0:0:0:0:ffff:7e7b:2b3a
126.123.43.59 0:0:0:0:0:ffff:7e7b:2b3b
126.123.43.60 0:0:0:0:0:ffff:7e7b:2b3c


126.123.43.61 0:0:0:0:0:ffff:7e7b:2b3d
126.123.43.62 0:0:0:0:0:ffff:7e7b:2b3e
126.123.43.63 0:0:0:0:0:ffff:7e7b:2b3f
126.123.43.64 0:0:0:0:0:ffff:7e7b:2b40
126.123.43.65 0:0:0:0:0:ffff:7e7b:2b41
126.123.43.66 0:0:0:0:0:ffff:7e7b:2b42
126.123.43.67 0:0:0:0:0:ffff:7e7b:2b43
126.123.43.68 0:0:0:0:0:ffff:7e7b:2b44
126.123.43.69 0:0:0:0:0:ffff:7e7b:2b45
126.123.43.70 0:0:0:0:0:ffff:7e7b:2b46
126.123.43.71 0:0:0:0:0:ffff:7e7b:2b47
126.123.43.72 0:0:0:0:0:ffff:7e7b:2b48
126.123.43.73 0:0:0:0:0:ffff:7e7b:2b49
126.123.43.74 0:0:0:0:0:ffff:7e7b:2b4a
126.123.43.75 0:0:0:0:0:ffff:7e7b:2b4b
126.123.43.76 0:0:0:0:0:ffff:7e7b:2b4c
126.123.43.77 0:0:0:0:0:ffff:7e7b:2b4d
126.123.43.78 0:0:0:0:0:ffff:7e7b:2b4e
126.123.43.79 0:0:0:0:0:ffff:7e7b:2b4f
126.123.43.80 0:0:0:0:0:ffff:7e7b:2b50
126.123.43.81 0:0:0:0:0:ffff:7e7b:2b51
126.123.43.82 0:0:0:0:0:ffff:7e7b:2b52
126.123.43.83 0:0:0:0:0:ffff:7e7b:2b53
126.123.43.84 0:0:0:0:0:ffff:7e7b:2b54
126.123.43.85 0:0:0:0:0:ffff:7e7b:2b55
126.123.43.86 0:0:0:0:0:ffff:7e7b:2b56
126.123.43.87 0:0:0:0:0:ffff:7e7b:2b57
126.123.43.88 0:0:0:0:0:ffff:7e7b:2b58
126.123.43.89 0:0:0:0:0:ffff:7e7b:2b59
126.123.43.90 0:0:0:0:0:ffff:7e7b:2b5a
126.123.43.91 0:0:0:0:0:ffff:7e7b:2b5b
126.123.43.92 0:0:0:0:0:ffff:7e7b:2b5c
126.123.43.93 0:0:0:0:0:ffff:7e7b:2b5d
126.123.43.94 0:0:0:0:0:ffff:7e7b:2b5e
126.123.43.95 0:0:0:0:0:ffff:7e7b:2b5f
126.123.43.96 0:0:0:0:0:ffff:7e7b:2b60
126.123.43.97 0:0:0:0:0:ffff:7e7b:2b61
126.123.43.98 0:0:0:0:0:ffff:7e7b:2b62
126.123.43.99 0:0:0:0:0:ffff:7e7b:2b63
126.123.43.100 0:0:0:0:0:ffff:7e7b:2b64
126.123.43.101 0:0:0:0:0:ffff:7e7b:2b65
126.123.43.102 0:0:0:0:0:ffff:7e7b:2b66
126.123.43.103 0:0:0:0:0:ffff:7e7b:2b67
126.123.43.104 0:0:0:0:0:ffff:7e7b:2b68
126.123.43.105 0:0:0:0:0:ffff:7e7b:2b69
126.123.43.106 0:0:0:0:0:ffff:7e7b:2b6a
126.123.43.107 0:0:0:0:0:ffff:7e7b:2b6b
126.123.43.108 0:0:0:0:0:ffff:7e7b:2b6c
126.123.43.109 0:0:0:0:0:ffff:7e7b:2b6d
126.123.43.110 0:0:0:0:0:ffff:7e7b:2b6e
126.123.43.111 0:0:0:0:0:ffff:7e7b:2b6f
126.123.43.112 0:0:0:0:0:ffff:7e7b:2b70
126.123.43.113 0:0:0:0:0:ffff:7e7b:2b71
126.123.43.114 0:0:0:0:0:ffff:7e7b:2b72
126.123.43.115 0:0:0:0:0:ffff:7e7b:2b73
126.123.43.116 0:0:0:0:0:ffff:7e7b:2b74
126.123.43.117 0:0:0:0:0:ffff:7e7b:2b75
126.123.43.118 0:0:0:0:0:ffff:7e7b:2b76
126.123.43.119 0:0:0:0:0:ffff:7e7b:2b77
126.123.43.120 0:0:0:0:0:ffff:7e7b:2b78


126.123.43.121 0:0:0:0:0:ffff:7e7b:2b79
126.123.43.122 0:0:0:0:0:ffff:7e7b:2b7a
126.123.43.123 0:0:0:0:0:ffff:7e7b:2b7b
126.123.43.124 0:0:0:0:0:ffff:7e7b:2b7c
126.123.43.125 0:0:0:0:0:ffff:7e7b:2b7d
126.123.43.126 0:0:0:0:0:ffff:7e7b:2b7e
126.123.43.127 0:0:0:0:0:ffff:7e7b:2b7f
126.123.43.128 0:0:0:0:0:ffff:7e7b:2b80
126.123.43.129 0:0:0:0:0:ffff:7e7b:2b81
126.123.43.130 0:0:0:0:0:ffff:7e7b:2b82
126.123.43.131 0:0:0:0:0:ffff:7e7b:2b83
126.123.43.132 0:0:0:0:0:ffff:7e7b:2b84
126.123.43.133 0:0:0:0:0:ffff:7e7b:2b85
126.123.43.134 0:0:0:0:0:ffff:7e7b:2b86
126.123.43.135 0:0:0:0:0:ffff:7e7b:2b87
126.123.43.136 0:0:0:0:0:ffff:7e7b:2b88
126.123.43.137 0:0:0:0:0:ffff:7e7b:2b89
126.123.43.138 0:0:0:0:0:ffff:7e7b:2b8a
126.123.43.139 0:0:0:0:0:ffff:7e7b:2b8b
126.123.43.140 0:0:0:0:0:ffff:7e7b:2b8c
126.123.43.141 0:0:0:0:0:ffff:7e7b:2b8d
126.123.43.142 0:0:0:0:0:ffff:7e7b:2b8e
126.123.43.143 0:0:0:0:0:ffff:7e7b:2b8f
126.123.43.144 0:0:0:0:0:ffff:7e7b:2b90
126.123.43.145 0:0:0:0:0:ffff:7e7b:2b91
126.123.43.146 0:0:0:0:0:ffff:7e7b:2b92
126.123.43.147 0:0:0:0:0:ffff:7e7b:2b93
126.123.43.148 0:0:0:0:0:ffff:7e7b:2b94
126.123.43.149 0:0:0:0:0:ffff:7e7b:2b95
126.123.43.150 0:0:0:0:0:ffff:7e7b:2b96
126.123.43.151 0:0:0:0:0:ffff:7e7b:2b97
126.123.43.152 0:0:0:0:0:ffff:7e7b:2b98
126.123.43.153 0:0:0:0:0:ffff:7e7b:2b99
126.123.43.154 0:0:0:0:0:ffff:7e7b:2b9a
126.123.43.155 0:0:0:0:0:ffff:7e7b:2b9b
126.123.43.156 0:0:0:0:0:ffff:7e7b:2b9c
126.123.43.157 0:0:0:0:0:ffff:7e7b:2b9d
126.123.43.158 0:0:0:0:0:ffff:7e7b:2b9e
126.123.43.159 0:0:0:0:0:ffff:7e7b:2b9f
126.123.43.160 0:0:0:0:0:ffff:7e7b:2ba0
126.123.43.161 0:0:0:0:0:ffff:7e7b:2ba1
126.123.43.162 0:0:0:0:0:ffff:7e7b:2ba2
126.123.43.163 0:0:0:0:0:ffff:7e7b:2ba3
126.123.43.164 0:0:0:0:0:ffff:7e7b:2ba4
126.123.43.165 0:0:0:0:0:ffff:7e7b:2ba5
126.123.43.166 0:0:0:0:0:ffff:7e7b:2ba6
126.123.43.167 0:0:0:0:0:ffff:7e7b:2ba7
126.123.43.168 0:0:0:0:0:ffff:7e7b:2ba8
126.123.43.169 0:0:0:0:0:ffff:7e7b:2ba9
126.123.43.170 0:0:0:0:0:ffff:7e7b:2baa
126.123.43.171 0:0:0:0:0:ffff:7e7b:2bab
126.123.43.172 0:0:0:0:0:ffff:7e7b:2bac
126.123.43.173 0:0:0:0:0:ffff:7e7b:2bad
126.123.43.174 0:0:0:0:0:ffff:7e7b:2bae
126.123.43.175 0:0:0:0:0:ffff:7e7b:2baf
126.123.43.176 0:0:0:0:0:ffff:7e7b:2bb0
126.123.43.177 0:0:0:0:0:ffff:7e7b:2bb1
126.123.43.178 0:0:0:0:0:ffff:7e7b:2bb2
126.123.43.179 0:0:0:0:0:ffff:7e7b:2bb3
126.123.43.180 0:0:0:0:0:ffff:7e7b:2bb4


126.123.43.181 0:0:0:0:0:ffff:7e7b:2bb5
126.123.43.182 0:0:0:0:0:ffff:7e7b:2bb6
126.123.43.183 0:0:0:0:0:ffff:7e7b:2bb7
126.123.43.184 0:0:0:0:0:ffff:7e7b:2bb8
126.123.43.185 0:0:0:0:0:ffff:7e7b:2bb9
126.123.43.186 0:0:0:0:0:ffff:7e7b:2bba
126.123.43.187 0:0:0:0:0:ffff:7e7b:2bbb
126.123.43.188 0:0:0:0:0:ffff:7e7b:2bbc
126.123.43.189 0:0:0:0:0:ffff:7e7b:2bbd
126.123.43.190 0:0:0:0:0:ffff:7e7b:2bbe
126.123.43.191 0:0:0:0:0:ffff:7e7b:2bbf
126.123.43.192 0:0:0:0:0:ffff:7e7b:2bc0
126.123.43.193 0:0:0:0:0:ffff:7e7b:2bc1
126.123.43.194 0:0:0:0:0:ffff:7e7b:2bc2
126.123.43.195 0:0:0:0:0:ffff:7e7b:2bc3
126.123.43.196 0:0:0:0:0:ffff:7e7b:2bc4
126.123.43.197 0:0:0:0:0:ffff:7e7b:2bc5
126.123.43.198 0:0:0:0:0:ffff:7e7b:2bc6
126.123.43.199 0:0:0:0:0:ffff:7e7b:2bc7
126.123.43.200 0:0:0:0:0:ffff:7e7b:2bc8
126.123.43.201 0:0:0:0:0:ffff:7e7b:2bc9
126.123.43.202 0:0:0:0:0:ffff:7e7b:2bca
126.123.43.203 0:0:0:0:0:ffff:7e7b:2bcb
126.123.43.204 0:0:0:0:0:ffff:7e7b:2bcc
126.123.43.205 0:0:0:0:0:ffff:7e7b:2bcd
126.123.43.206 0:0:0:0:0:ffff:7e7b:2bce
126.123.43.207 0:0:0:0:0:ffff:7e7b:2bcf
126.123.43.208 0:0:0:0:0:ffff:7e7b:2bd0
126.123.43.209 0:0:0:0:0:ffff:7e7b:2bd1
126.123.43.210 0:0:0:0:0:ffff:7e7b:2bd2
126.123.43.211 0:0:0:0:0:ffff:7e7b:2bd3
126.123.43.212 0:0:0:0:0:ffff:7e7b:2bd4
126.123.43.213 0:0:0:0:0:ffff:7e7b:2bd5
126.123.43.214 0:0:0:0:0:ffff:7e7b:2bd6
126.123.43.215 0:0:0:0:0:ffff:7e7b:2bd7
126.123.43.216 0:0:0:0:0:ffff:7e7b:2bd8
126.123.43.217 0:0:0:0:0:ffff:7e7b:2bd9
126.123.43.218 0:0:0:0:0:ffff:7e7b:2bda
126.123.43.219 0:0:0:0:0:ffff:7e7b:2bdb
126.123.43.220 0:0:0:0:0:ffff:7e7b:2bdc
126.123.43.221 0:0:0:0:0:ffff:7e7b:2bdd
126.123.43.222 0:0:0:0:0:ffff:7e7b:2bde
126.123.43.223 0:0:0:0:0:ffff:7e7b:2bdf
126.123.43.224 0:0:0:0:0:ffff:7e7b:2be0
126.123.43.225 0:0:0:0:0:ffff:7e7b:2be1
126.123.43.226 0:0:0:0:0:ffff:7e7b:2be2
126.123.43.227 0:0:0:0:0:ffff:7e7b:2be3
126.123.43.228 0:0:0:0:0:ffff:7e7b:2be4
126.123.43.229 0:0:0:0:0:ffff:7e7b:2be5
126.123.43.230 0:0:0:0:0:ffff:7e7b:2be6
126.123.43.231 0:0:0:0:0:ffff:7e7b:2be7
126.123.43.232 0:0:0:0:0:ffff:7e7b:2be8
126.123.43.233 0:0:0:0:0:ffff:7e7b:2be9
126.123.43.234 0:0:0:0:0:ffff:7e7b:2bea
126.123.43.235 0:0:0:0:0:ffff:7e7b:2beb
126.123.43.236 0:0:0:0:0:ffff:7e7b:2bec
126.123.43.237 0:0:0:0:0:ffff:7e7b:2bed
126.123.43.238 0:0:0:0:0:ffff:7e7b:2bee
126.123.43.239 0:0:0:0:0:ffff:7e7b:2bef
126.123.43.240 0:0:0:0:0:ffff:7e7b:2bf0
126.123.43.241 0:0:0:0:0:ffff:7e7b:2bf1
126.123.43.242 0:0:0:0:0:ffff:7e7b:2bf2
126.123.43.243 0:0:0:0:0:ffff:7e7b:2bf3
126.123.43.244 0:0:0:0:0:ffff:7e7b:2bf4
126.123.43.245 0:0:0:0:0:ffff:7e7b:2bf5
126.123.43.246 0:0:0:0:0:ffff:7e7b:2bf6
126.123.43.247 0:0:0:0:0:ffff:7e7b:2bf7
126.123.43.248 0:0:0:0:0:ffff:7e7b:2bf8
126.123.43.249 0:0:0:0:0:ffff:7e7b:2bf9
126.123.43.250 0:0:0:0:0:ffff:7e7b:2bfa
126.123.43.251 0:0:0:0:0:ffff:7e7b:2bfb
126.123.43.252 0:0:0:0:0:ffff:7e7b:2bfc
126.123.43.253 0:0:0:0:0:ffff:7e7b:2bfd
126.123.43.254 0:0:0:0:0:ffff:7e7b:2bfe
126.123.43.255 0:0:0:0:0:ffff:7e7b:2bff


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.