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
126.123.45.1 0:0:0:0:0:ffff:7e7b:2d01
126.123.45.2 0:0:0:0:0:ffff:7e7b:2d02
126.123.45.3 0:0:0:0:0:ffff:7e7b:2d03
126.123.45.4 0:0:0:0:0:ffff:7e7b:2d04
126.123.45.5 0:0:0:0:0:ffff:7e7b:2d05
126.123.45.6 0:0:0:0:0:ffff:7e7b:2d06
126.123.45.7 0:0:0:0:0:ffff:7e7b:2d07
126.123.45.8 0:0:0:0:0:ffff:7e7b:2d08
126.123.45.9 0:0:0:0:0:ffff:7e7b:2d09
126.123.45.10 0:0:0:0:0:ffff:7e7b:2d0a
126.123.45.11 0:0:0:0:0:ffff:7e7b:2d0b
126.123.45.12 0:0:0:0:0:ffff:7e7b:2d0c
126.123.45.13 0:0:0:0:0:ffff:7e7b:2d0d
126.123.45.14 0:0:0:0:0:ffff:7e7b:2d0e
126.123.45.15 0:0:0:0:0:ffff:7e7b:2d0f
126.123.45.16 0:0:0:0:0:ffff:7e7b:2d10
126.123.45.17 0:0:0:0:0:ffff:7e7b:2d11
126.123.45.18 0:0:0:0:0:ffff:7e7b:2d12
126.123.45.19 0:0:0:0:0:ffff:7e7b:2d13
126.123.45.20 0:0:0:0:0:ffff:7e7b:2d14
126.123.45.21 0:0:0:0:0:ffff:7e7b:2d15
126.123.45.22 0:0:0:0:0:ffff:7e7b:2d16
126.123.45.23 0:0:0:0:0:ffff:7e7b:2d17
126.123.45.24 0:0:0:0:0:ffff:7e7b:2d18
126.123.45.25 0:0:0:0:0:ffff:7e7b:2d19
126.123.45.26 0:0:0:0:0:ffff:7e7b:2d1a
126.123.45.27 0:0:0:0:0:ffff:7e7b:2d1b
126.123.45.28 0:0:0:0:0:ffff:7e7b:2d1c
126.123.45.29 0:0:0:0:0:ffff:7e7b:2d1d
126.123.45.30 0:0:0:0:0:ffff:7e7b:2d1e
126.123.45.31 0:0:0:0:0:ffff:7e7b:2d1f
126.123.45.32 0:0:0:0:0:ffff:7e7b:2d20
126.123.45.33 0:0:0:0:0:ffff:7e7b:2d21
126.123.45.34 0:0:0:0:0:ffff:7e7b:2d22
126.123.45.35 0:0:0:0:0:ffff:7e7b:2d23
126.123.45.36 0:0:0:0:0:ffff:7e7b:2d24
126.123.45.37 0:0:0:0:0:ffff:7e7b:2d25
126.123.45.38 0:0:0:0:0:ffff:7e7b:2d26
126.123.45.39 0:0:0:0:0:ffff:7e7b:2d27
126.123.45.40 0:0:0:0:0:ffff:7e7b:2d28
126.123.45.41 0:0:0:0:0:ffff:7e7b:2d29
126.123.45.42 0:0:0:0:0:ffff:7e7b:2d2a
126.123.45.43 0:0:0:0:0:ffff:7e7b:2d2b
126.123.45.44 0:0:0:0:0:ffff:7e7b:2d2c
126.123.45.45 0:0:0:0:0:ffff:7e7b:2d2d
126.123.45.46 0:0:0:0:0:ffff:7e7b:2d2e
126.123.45.47 0:0:0:0:0:ffff:7e7b:2d2f
126.123.45.48 0:0:0:0:0:ffff:7e7b:2d30
126.123.45.49 0:0:0:0:0:ffff:7e7b:2d31
126.123.45.50 0:0:0:0:0:ffff:7e7b:2d32
126.123.45.51 0:0:0:0:0:ffff:7e7b:2d33
126.123.45.52 0:0:0:0:0:ffff:7e7b:2d34
126.123.45.53 0:0:0:0:0:ffff:7e7b:2d35
126.123.45.54 0:0:0:0:0:ffff:7e7b:2d36
126.123.45.55 0:0:0:0:0:ffff:7e7b:2d37
126.123.45.56 0:0:0:0:0:ffff:7e7b:2d38
126.123.45.57 0:0:0:0:0:ffff:7e7b:2d39
126.123.45.58 0:0:0:0:0:ffff:7e7b:2d3a
126.123.45.59 0:0:0:0:0:ffff:7e7b:2d3b
126.123.45.60 0:0:0:0:0:ffff:7e7b:2d3c


126.123.45.61 0:0:0:0:0:ffff:7e7b:2d3d
126.123.45.62 0:0:0:0:0:ffff:7e7b:2d3e
126.123.45.63 0:0:0:0:0:ffff:7e7b:2d3f
126.123.45.64 0:0:0:0:0:ffff:7e7b:2d40
126.123.45.65 0:0:0:0:0:ffff:7e7b:2d41
126.123.45.66 0:0:0:0:0:ffff:7e7b:2d42
126.123.45.67 0:0:0:0:0:ffff:7e7b:2d43
126.123.45.68 0:0:0:0:0:ffff:7e7b:2d44
126.123.45.69 0:0:0:0:0:ffff:7e7b:2d45
126.123.45.70 0:0:0:0:0:ffff:7e7b:2d46
126.123.45.71 0:0:0:0:0:ffff:7e7b:2d47
126.123.45.72 0:0:0:0:0:ffff:7e7b:2d48
126.123.45.73 0:0:0:0:0:ffff:7e7b:2d49
126.123.45.74 0:0:0:0:0:ffff:7e7b:2d4a
126.123.45.75 0:0:0:0:0:ffff:7e7b:2d4b
126.123.45.76 0:0:0:0:0:ffff:7e7b:2d4c
126.123.45.77 0:0:0:0:0:ffff:7e7b:2d4d
126.123.45.78 0:0:0:0:0:ffff:7e7b:2d4e
126.123.45.79 0:0:0:0:0:ffff:7e7b:2d4f
126.123.45.80 0:0:0:0:0:ffff:7e7b:2d50
126.123.45.81 0:0:0:0:0:ffff:7e7b:2d51
126.123.45.82 0:0:0:0:0:ffff:7e7b:2d52
126.123.45.83 0:0:0:0:0:ffff:7e7b:2d53
126.123.45.84 0:0:0:0:0:ffff:7e7b:2d54
126.123.45.85 0:0:0:0:0:ffff:7e7b:2d55
126.123.45.86 0:0:0:0:0:ffff:7e7b:2d56
126.123.45.87 0:0:0:0:0:ffff:7e7b:2d57
126.123.45.88 0:0:0:0:0:ffff:7e7b:2d58
126.123.45.89 0:0:0:0:0:ffff:7e7b:2d59
126.123.45.90 0:0:0:0:0:ffff:7e7b:2d5a
126.123.45.91 0:0:0:0:0:ffff:7e7b:2d5b
126.123.45.92 0:0:0:0:0:ffff:7e7b:2d5c
126.123.45.93 0:0:0:0:0:ffff:7e7b:2d5d
126.123.45.94 0:0:0:0:0:ffff:7e7b:2d5e
126.123.45.95 0:0:0:0:0:ffff:7e7b:2d5f
126.123.45.96 0:0:0:0:0:ffff:7e7b:2d60
126.123.45.97 0:0:0:0:0:ffff:7e7b:2d61
126.123.45.98 0:0:0:0:0:ffff:7e7b:2d62
126.123.45.99 0:0:0:0:0:ffff:7e7b:2d63
126.123.45.100 0:0:0:0:0:ffff:7e7b:2d64
126.123.45.101 0:0:0:0:0:ffff:7e7b:2d65
126.123.45.102 0:0:0:0:0:ffff:7e7b:2d66
126.123.45.103 0:0:0:0:0:ffff:7e7b:2d67
126.123.45.104 0:0:0:0:0:ffff:7e7b:2d68
126.123.45.105 0:0:0:0:0:ffff:7e7b:2d69
126.123.45.106 0:0:0:0:0:ffff:7e7b:2d6a
126.123.45.107 0:0:0:0:0:ffff:7e7b:2d6b
126.123.45.108 0:0:0:0:0:ffff:7e7b:2d6c
126.123.45.109 0:0:0:0:0:ffff:7e7b:2d6d
126.123.45.110 0:0:0:0:0:ffff:7e7b:2d6e
126.123.45.111 0:0:0:0:0:ffff:7e7b:2d6f
126.123.45.112 0:0:0:0:0:ffff:7e7b:2d70
126.123.45.113 0:0:0:0:0:ffff:7e7b:2d71
126.123.45.114 0:0:0:0:0:ffff:7e7b:2d72
126.123.45.115 0:0:0:0:0:ffff:7e7b:2d73
126.123.45.116 0:0:0:0:0:ffff:7e7b:2d74
126.123.45.117 0:0:0:0:0:ffff:7e7b:2d75
126.123.45.118 0:0:0:0:0:ffff:7e7b:2d76
126.123.45.119 0:0:0:0:0:ffff:7e7b:2d77
126.123.45.120 0:0:0:0:0:ffff:7e7b:2d78


126.123.45.121 0:0:0:0:0:ffff:7e7b:2d79
126.123.45.122 0:0:0:0:0:ffff:7e7b:2d7a
126.123.45.123 0:0:0:0:0:ffff:7e7b:2d7b
126.123.45.124 0:0:0:0:0:ffff:7e7b:2d7c
126.123.45.125 0:0:0:0:0:ffff:7e7b:2d7d
126.123.45.126 0:0:0:0:0:ffff:7e7b:2d7e
126.123.45.127 0:0:0:0:0:ffff:7e7b:2d7f
126.123.45.128 0:0:0:0:0:ffff:7e7b:2d80
126.123.45.129 0:0:0:0:0:ffff:7e7b:2d81
126.123.45.130 0:0:0:0:0:ffff:7e7b:2d82
126.123.45.131 0:0:0:0:0:ffff:7e7b:2d83
126.123.45.132 0:0:0:0:0:ffff:7e7b:2d84
126.123.45.133 0:0:0:0:0:ffff:7e7b:2d85
126.123.45.134 0:0:0:0:0:ffff:7e7b:2d86
126.123.45.135 0:0:0:0:0:ffff:7e7b:2d87
126.123.45.136 0:0:0:0:0:ffff:7e7b:2d88
126.123.45.137 0:0:0:0:0:ffff:7e7b:2d89
126.123.45.138 0:0:0:0:0:ffff:7e7b:2d8a
126.123.45.139 0:0:0:0:0:ffff:7e7b:2d8b
126.123.45.140 0:0:0:0:0:ffff:7e7b:2d8c
126.123.45.141 0:0:0:0:0:ffff:7e7b:2d8d
126.123.45.142 0:0:0:0:0:ffff:7e7b:2d8e
126.123.45.143 0:0:0:0:0:ffff:7e7b:2d8f
126.123.45.144 0:0:0:0:0:ffff:7e7b:2d90
126.123.45.145 0:0:0:0:0:ffff:7e7b:2d91
126.123.45.146 0:0:0:0:0:ffff:7e7b:2d92
126.123.45.147 0:0:0:0:0:ffff:7e7b:2d93
126.123.45.148 0:0:0:0:0:ffff:7e7b:2d94
126.123.45.149 0:0:0:0:0:ffff:7e7b:2d95
126.123.45.150 0:0:0:0:0:ffff:7e7b:2d96
126.123.45.151 0:0:0:0:0:ffff:7e7b:2d97
126.123.45.152 0:0:0:0:0:ffff:7e7b:2d98
126.123.45.153 0:0:0:0:0:ffff:7e7b:2d99
126.123.45.154 0:0:0:0:0:ffff:7e7b:2d9a
126.123.45.155 0:0:0:0:0:ffff:7e7b:2d9b
126.123.45.156 0:0:0:0:0:ffff:7e7b:2d9c
126.123.45.157 0:0:0:0:0:ffff:7e7b:2d9d
126.123.45.158 0:0:0:0:0:ffff:7e7b:2d9e
126.123.45.159 0:0:0:0:0:ffff:7e7b:2d9f
126.123.45.160 0:0:0:0:0:ffff:7e7b:2da0
126.123.45.161 0:0:0:0:0:ffff:7e7b:2da1
126.123.45.162 0:0:0:0:0:ffff:7e7b:2da2
126.123.45.163 0:0:0:0:0:ffff:7e7b:2da3
126.123.45.164 0:0:0:0:0:ffff:7e7b:2da4
126.123.45.165 0:0:0:0:0:ffff:7e7b:2da5
126.123.45.166 0:0:0:0:0:ffff:7e7b:2da6
126.123.45.167 0:0:0:0:0:ffff:7e7b:2da7
126.123.45.168 0:0:0:0:0:ffff:7e7b:2da8
126.123.45.169 0:0:0:0:0:ffff:7e7b:2da9
126.123.45.170 0:0:0:0:0:ffff:7e7b:2daa
126.123.45.171 0:0:0:0:0:ffff:7e7b:2dab
126.123.45.172 0:0:0:0:0:ffff:7e7b:2dac
126.123.45.173 0:0:0:0:0:ffff:7e7b:2dad
126.123.45.174 0:0:0:0:0:ffff:7e7b:2dae
126.123.45.175 0:0:0:0:0:ffff:7e7b:2daf
126.123.45.176 0:0:0:0:0:ffff:7e7b:2db0
126.123.45.177 0:0:0:0:0:ffff:7e7b:2db1
126.123.45.178 0:0:0:0:0:ffff:7e7b:2db2
126.123.45.179 0:0:0:0:0:ffff:7e7b:2db3
126.123.45.180 0:0:0:0:0:ffff:7e7b:2db4


126.123.45.181 0:0:0:0:0:ffff:7e7b:2db5
126.123.45.182 0:0:0:0:0:ffff:7e7b:2db6
126.123.45.183 0:0:0:0:0:ffff:7e7b:2db7
126.123.45.184 0:0:0:0:0:ffff:7e7b:2db8
126.123.45.185 0:0:0:0:0:ffff:7e7b:2db9
126.123.45.186 0:0:0:0:0:ffff:7e7b:2dba
126.123.45.187 0:0:0:0:0:ffff:7e7b:2dbb
126.123.45.188 0:0:0:0:0:ffff:7e7b:2dbc
126.123.45.189 0:0:0:0:0:ffff:7e7b:2dbd
126.123.45.190 0:0:0:0:0:ffff:7e7b:2dbe
126.123.45.191 0:0:0:0:0:ffff:7e7b:2dbf
126.123.45.192 0:0:0:0:0:ffff:7e7b:2dc0
126.123.45.193 0:0:0:0:0:ffff:7e7b:2dc1
126.123.45.194 0:0:0:0:0:ffff:7e7b:2dc2
126.123.45.195 0:0:0:0:0:ffff:7e7b:2dc3
126.123.45.196 0:0:0:0:0:ffff:7e7b:2dc4
126.123.45.197 0:0:0:0:0:ffff:7e7b:2dc5
126.123.45.198 0:0:0:0:0:ffff:7e7b:2dc6
126.123.45.199 0:0:0:0:0:ffff:7e7b:2dc7
126.123.45.200 0:0:0:0:0:ffff:7e7b:2dc8
126.123.45.201 0:0:0:0:0:ffff:7e7b:2dc9
126.123.45.202 0:0:0:0:0:ffff:7e7b:2dca
126.123.45.203 0:0:0:0:0:ffff:7e7b:2dcb
126.123.45.204 0:0:0:0:0:ffff:7e7b:2dcc
126.123.45.205 0:0:0:0:0:ffff:7e7b:2dcd
126.123.45.206 0:0:0:0:0:ffff:7e7b:2dce
126.123.45.207 0:0:0:0:0:ffff:7e7b:2dcf
126.123.45.208 0:0:0:0:0:ffff:7e7b:2dd0
126.123.45.209 0:0:0:0:0:ffff:7e7b:2dd1
126.123.45.210 0:0:0:0:0:ffff:7e7b:2dd2
126.123.45.211 0:0:0:0:0:ffff:7e7b:2dd3
126.123.45.212 0:0:0:0:0:ffff:7e7b:2dd4
126.123.45.213 0:0:0:0:0:ffff:7e7b:2dd5
126.123.45.214 0:0:0:0:0:ffff:7e7b:2dd6
126.123.45.215 0:0:0:0:0:ffff:7e7b:2dd7
126.123.45.216 0:0:0:0:0:ffff:7e7b:2dd8
126.123.45.217 0:0:0:0:0:ffff:7e7b:2dd9
126.123.45.218 0:0:0:0:0:ffff:7e7b:2dda
126.123.45.219 0:0:0:0:0:ffff:7e7b:2ddb
126.123.45.220 0:0:0:0:0:ffff:7e7b:2ddc
126.123.45.221 0:0:0:0:0:ffff:7e7b:2ddd
126.123.45.222 0:0:0:0:0:ffff:7e7b:2dde
126.123.45.223 0:0:0:0:0:ffff:7e7b:2ddf
126.123.45.224 0:0:0:0:0:ffff:7e7b:2de0
126.123.45.225 0:0:0:0:0:ffff:7e7b:2de1
126.123.45.226 0:0:0:0:0:ffff:7e7b:2de2
126.123.45.227 0:0:0:0:0:ffff:7e7b:2de3
126.123.45.228 0:0:0:0:0:ffff:7e7b:2de4
126.123.45.229 0:0:0:0:0:ffff:7e7b:2de5
126.123.45.230 0:0:0:0:0:ffff:7e7b:2de6
126.123.45.231 0:0:0:0:0:ffff:7e7b:2de7
126.123.45.232 0:0:0:0:0:ffff:7e7b:2de8
126.123.45.233 0:0:0:0:0:ffff:7e7b:2de9
126.123.45.234 0:0:0:0:0:ffff:7e7b:2dea
126.123.45.235 0:0:0:0:0:ffff:7e7b:2deb
126.123.45.236 0:0:0:0:0:ffff:7e7b:2dec
126.123.45.237 0:0:0:0:0:ffff:7e7b:2ded
126.123.45.238 0:0:0:0:0:ffff:7e7b:2dee
126.123.45.239 0:0:0:0:0:ffff:7e7b:2def
126.123.45.240 0:0:0:0:0:ffff:7e7b:2df0
126.123.45.241 0:0:0:0:0:ffff:7e7b:2df1
126.123.45.242 0:0:0:0:0:ffff:7e7b:2df2
126.123.45.243 0:0:0:0:0:ffff:7e7b:2df3
126.123.45.244 0:0:0:0:0:ffff:7e7b:2df4
126.123.45.245 0:0:0:0:0:ffff:7e7b:2df5
126.123.45.246 0:0:0:0:0:ffff:7e7b:2df6
126.123.45.247 0:0:0:0:0:ffff:7e7b:2df7
126.123.45.248 0:0:0:0:0:ffff:7e7b:2df8
126.123.45.249 0:0:0:0:0:ffff:7e7b:2df9
126.123.45.250 0:0:0:0:0:ffff:7e7b:2dfa
126.123.45.251 0:0:0:0:0:ffff:7e7b:2dfb
126.123.45.252 0:0:0:0:0:ffff:7e7b:2dfc
126.123.45.253 0:0:0:0:0:ffff:7e7b:2dfd
126.123.45.254 0:0:0:0:0:ffff:7e7b:2dfe
126.123.45.255 0:0:0:0:0:ffff:7e7b:2dff


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.