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
187.40.30.1 0:0:0:0:0:ffff:bb28:1e01
187.40.30.2 0:0:0:0:0:ffff:bb28:1e02
187.40.30.3 0:0:0:0:0:ffff:bb28:1e03
187.40.30.4 0:0:0:0:0:ffff:bb28:1e04
187.40.30.5 0:0:0:0:0:ffff:bb28:1e05
187.40.30.6 0:0:0:0:0:ffff:bb28:1e06
187.40.30.7 0:0:0:0:0:ffff:bb28:1e07
187.40.30.8 0:0:0:0:0:ffff:bb28:1e08
187.40.30.9 0:0:0:0:0:ffff:bb28:1e09
187.40.30.10 0:0:0:0:0:ffff:bb28:1e0a
187.40.30.11 0:0:0:0:0:ffff:bb28:1e0b
187.40.30.12 0:0:0:0:0:ffff:bb28:1e0c
187.40.30.13 0:0:0:0:0:ffff:bb28:1e0d
187.40.30.14 0:0:0:0:0:ffff:bb28:1e0e
187.40.30.15 0:0:0:0:0:ffff:bb28:1e0f
187.40.30.16 0:0:0:0:0:ffff:bb28:1e10
187.40.30.17 0:0:0:0:0:ffff:bb28:1e11
187.40.30.18 0:0:0:0:0:ffff:bb28:1e12
187.40.30.19 0:0:0:0:0:ffff:bb28:1e13
187.40.30.20 0:0:0:0:0:ffff:bb28:1e14
187.40.30.21 0:0:0:0:0:ffff:bb28:1e15
187.40.30.22 0:0:0:0:0:ffff:bb28:1e16
187.40.30.23 0:0:0:0:0:ffff:bb28:1e17
187.40.30.24 0:0:0:0:0:ffff:bb28:1e18
187.40.30.25 0:0:0:0:0:ffff:bb28:1e19
187.40.30.26 0:0:0:0:0:ffff:bb28:1e1a
187.40.30.27 0:0:0:0:0:ffff:bb28:1e1b
187.40.30.28 0:0:0:0:0:ffff:bb28:1e1c
187.40.30.29 0:0:0:0:0:ffff:bb28:1e1d
187.40.30.30 0:0:0:0:0:ffff:bb28:1e1e
187.40.30.31 0:0:0:0:0:ffff:bb28:1e1f
187.40.30.32 0:0:0:0:0:ffff:bb28:1e20
187.40.30.33 0:0:0:0:0:ffff:bb28:1e21
187.40.30.34 0:0:0:0:0:ffff:bb28:1e22
187.40.30.35 0:0:0:0:0:ffff:bb28:1e23
187.40.30.36 0:0:0:0:0:ffff:bb28:1e24
187.40.30.37 0:0:0:0:0:ffff:bb28:1e25
187.40.30.38 0:0:0:0:0:ffff:bb28:1e26
187.40.30.39 0:0:0:0:0:ffff:bb28:1e27
187.40.30.40 0:0:0:0:0:ffff:bb28:1e28
187.40.30.41 0:0:0:0:0:ffff:bb28:1e29
187.40.30.42 0:0:0:0:0:ffff:bb28:1e2a
187.40.30.43 0:0:0:0:0:ffff:bb28:1e2b
187.40.30.44 0:0:0:0:0:ffff:bb28:1e2c
187.40.30.45 0:0:0:0:0:ffff:bb28:1e2d
187.40.30.46 0:0:0:0:0:ffff:bb28:1e2e
187.40.30.47 0:0:0:0:0:ffff:bb28:1e2f
187.40.30.48 0:0:0:0:0:ffff:bb28:1e30
187.40.30.49 0:0:0:0:0:ffff:bb28:1e31
187.40.30.50 0:0:0:0:0:ffff:bb28:1e32
187.40.30.51 0:0:0:0:0:ffff:bb28:1e33
187.40.30.52 0:0:0:0:0:ffff:bb28:1e34
187.40.30.53 0:0:0:0:0:ffff:bb28:1e35
187.40.30.54 0:0:0:0:0:ffff:bb28:1e36
187.40.30.55 0:0:0:0:0:ffff:bb28:1e37
187.40.30.56 0:0:0:0:0:ffff:bb28:1e38
187.40.30.57 0:0:0:0:0:ffff:bb28:1e39
187.40.30.58 0:0:0:0:0:ffff:bb28:1e3a
187.40.30.59 0:0:0:0:0:ffff:bb28:1e3b
187.40.30.60 0:0:0:0:0:ffff:bb28:1e3c


187.40.30.61 0:0:0:0:0:ffff:bb28:1e3d
187.40.30.62 0:0:0:0:0:ffff:bb28:1e3e
187.40.30.63 0:0:0:0:0:ffff:bb28:1e3f
187.40.30.64 0:0:0:0:0:ffff:bb28:1e40
187.40.30.65 0:0:0:0:0:ffff:bb28:1e41
187.40.30.66 0:0:0:0:0:ffff:bb28:1e42
187.40.30.67 0:0:0:0:0:ffff:bb28:1e43
187.40.30.68 0:0:0:0:0:ffff:bb28:1e44
187.40.30.69 0:0:0:0:0:ffff:bb28:1e45
187.40.30.70 0:0:0:0:0:ffff:bb28:1e46
187.40.30.71 0:0:0:0:0:ffff:bb28:1e47
187.40.30.72 0:0:0:0:0:ffff:bb28:1e48
187.40.30.73 0:0:0:0:0:ffff:bb28:1e49
187.40.30.74 0:0:0:0:0:ffff:bb28:1e4a
187.40.30.75 0:0:0:0:0:ffff:bb28:1e4b
187.40.30.76 0:0:0:0:0:ffff:bb28:1e4c
187.40.30.77 0:0:0:0:0:ffff:bb28:1e4d
187.40.30.78 0:0:0:0:0:ffff:bb28:1e4e
187.40.30.79 0:0:0:0:0:ffff:bb28:1e4f
187.40.30.80 0:0:0:0:0:ffff:bb28:1e50
187.40.30.81 0:0:0:0:0:ffff:bb28:1e51
187.40.30.82 0:0:0:0:0:ffff:bb28:1e52
187.40.30.83 0:0:0:0:0:ffff:bb28:1e53
187.40.30.84 0:0:0:0:0:ffff:bb28:1e54
187.40.30.85 0:0:0:0:0:ffff:bb28:1e55
187.40.30.86 0:0:0:0:0:ffff:bb28:1e56
187.40.30.87 0:0:0:0:0:ffff:bb28:1e57
187.40.30.88 0:0:0:0:0:ffff:bb28:1e58
187.40.30.89 0:0:0:0:0:ffff:bb28:1e59
187.40.30.90 0:0:0:0:0:ffff:bb28:1e5a
187.40.30.91 0:0:0:0:0:ffff:bb28:1e5b
187.40.30.92 0:0:0:0:0:ffff:bb28:1e5c
187.40.30.93 0:0:0:0:0:ffff:bb28:1e5d
187.40.30.94 0:0:0:0:0:ffff:bb28:1e5e
187.40.30.95 0:0:0:0:0:ffff:bb28:1e5f
187.40.30.96 0:0:0:0:0:ffff:bb28:1e60
187.40.30.97 0:0:0:0:0:ffff:bb28:1e61
187.40.30.98 0:0:0:0:0:ffff:bb28:1e62
187.40.30.99 0:0:0:0:0:ffff:bb28:1e63
187.40.30.100 0:0:0:0:0:ffff:bb28:1e64
187.40.30.101 0:0:0:0:0:ffff:bb28:1e65
187.40.30.102 0:0:0:0:0:ffff:bb28:1e66
187.40.30.103 0:0:0:0:0:ffff:bb28:1e67
187.40.30.104 0:0:0:0:0:ffff:bb28:1e68
187.40.30.105 0:0:0:0:0:ffff:bb28:1e69
187.40.30.106 0:0:0:0:0:ffff:bb28:1e6a
187.40.30.107 0:0:0:0:0:ffff:bb28:1e6b
187.40.30.108 0:0:0:0:0:ffff:bb28:1e6c
187.40.30.109 0:0:0:0:0:ffff:bb28:1e6d
187.40.30.110 0:0:0:0:0:ffff:bb28:1e6e
187.40.30.111 0:0:0:0:0:ffff:bb28:1e6f
187.40.30.112 0:0:0:0:0:ffff:bb28:1e70
187.40.30.113 0:0:0:0:0:ffff:bb28:1e71
187.40.30.114 0:0:0:0:0:ffff:bb28:1e72
187.40.30.115 0:0:0:0:0:ffff:bb28:1e73
187.40.30.116 0:0:0:0:0:ffff:bb28:1e74
187.40.30.117 0:0:0:0:0:ffff:bb28:1e75
187.40.30.118 0:0:0:0:0:ffff:bb28:1e76
187.40.30.119 0:0:0:0:0:ffff:bb28:1e77
187.40.30.120 0:0:0:0:0:ffff:bb28:1e78


187.40.30.121 0:0:0:0:0:ffff:bb28:1e79
187.40.30.122 0:0:0:0:0:ffff:bb28:1e7a
187.40.30.123 0:0:0:0:0:ffff:bb28:1e7b
187.40.30.124 0:0:0:0:0:ffff:bb28:1e7c
187.40.30.125 0:0:0:0:0:ffff:bb28:1e7d
187.40.30.126 0:0:0:0:0:ffff:bb28:1e7e
187.40.30.127 0:0:0:0:0:ffff:bb28:1e7f
187.40.30.128 0:0:0:0:0:ffff:bb28:1e80
187.40.30.129 0:0:0:0:0:ffff:bb28:1e81
187.40.30.130 0:0:0:0:0:ffff:bb28:1e82
187.40.30.131 0:0:0:0:0:ffff:bb28:1e83
187.40.30.132 0:0:0:0:0:ffff:bb28:1e84
187.40.30.133 0:0:0:0:0:ffff:bb28:1e85
187.40.30.134 0:0:0:0:0:ffff:bb28:1e86
187.40.30.135 0:0:0:0:0:ffff:bb28:1e87
187.40.30.136 0:0:0:0:0:ffff:bb28:1e88
187.40.30.137 0:0:0:0:0:ffff:bb28:1e89
187.40.30.138 0:0:0:0:0:ffff:bb28:1e8a
187.40.30.139 0:0:0:0:0:ffff:bb28:1e8b
187.40.30.140 0:0:0:0:0:ffff:bb28:1e8c
187.40.30.141 0:0:0:0:0:ffff:bb28:1e8d
187.40.30.142 0:0:0:0:0:ffff:bb28:1e8e
187.40.30.143 0:0:0:0:0:ffff:bb28:1e8f
187.40.30.144 0:0:0:0:0:ffff:bb28:1e90
187.40.30.145 0:0:0:0:0:ffff:bb28:1e91
187.40.30.146 0:0:0:0:0:ffff:bb28:1e92
187.40.30.147 0:0:0:0:0:ffff:bb28:1e93
187.40.30.148 0:0:0:0:0:ffff:bb28:1e94
187.40.30.149 0:0:0:0:0:ffff:bb28:1e95
187.40.30.150 0:0:0:0:0:ffff:bb28:1e96
187.40.30.151 0:0:0:0:0:ffff:bb28:1e97
187.40.30.152 0:0:0:0:0:ffff:bb28:1e98
187.40.30.153 0:0:0:0:0:ffff:bb28:1e99
187.40.30.154 0:0:0:0:0:ffff:bb28:1e9a
187.40.30.155 0:0:0:0:0:ffff:bb28:1e9b
187.40.30.156 0:0:0:0:0:ffff:bb28:1e9c
187.40.30.157 0:0:0:0:0:ffff:bb28:1e9d
187.40.30.158 0:0:0:0:0:ffff:bb28:1e9e
187.40.30.159 0:0:0:0:0:ffff:bb28:1e9f
187.40.30.160 0:0:0:0:0:ffff:bb28:1ea0
187.40.30.161 0:0:0:0:0:ffff:bb28:1ea1
187.40.30.162 0:0:0:0:0:ffff:bb28:1ea2
187.40.30.163 0:0:0:0:0:ffff:bb28:1ea3
187.40.30.164 0:0:0:0:0:ffff:bb28:1ea4
187.40.30.165 0:0:0:0:0:ffff:bb28:1ea5
187.40.30.166 0:0:0:0:0:ffff:bb28:1ea6
187.40.30.167 0:0:0:0:0:ffff:bb28:1ea7
187.40.30.168 0:0:0:0:0:ffff:bb28:1ea8
187.40.30.169 0:0:0:0:0:ffff:bb28:1ea9
187.40.30.170 0:0:0:0:0:ffff:bb28:1eaa
187.40.30.171 0:0:0:0:0:ffff:bb28:1eab
187.40.30.172 0:0:0:0:0:ffff:bb28:1eac
187.40.30.173 0:0:0:0:0:ffff:bb28:1ead
187.40.30.174 0:0:0:0:0:ffff:bb28:1eae
187.40.30.175 0:0:0:0:0:ffff:bb28:1eaf
187.40.30.176 0:0:0:0:0:ffff:bb28:1eb0
187.40.30.177 0:0:0:0:0:ffff:bb28:1eb1
187.40.30.178 0:0:0:0:0:ffff:bb28:1eb2
187.40.30.179 0:0:0:0:0:ffff:bb28:1eb3
187.40.30.180 0:0:0:0:0:ffff:bb28:1eb4


187.40.30.181 0:0:0:0:0:ffff:bb28:1eb5
187.40.30.182 0:0:0:0:0:ffff:bb28:1eb6
187.40.30.183 0:0:0:0:0:ffff:bb28:1eb7
187.40.30.184 0:0:0:0:0:ffff:bb28:1eb8
187.40.30.185 0:0:0:0:0:ffff:bb28:1eb9
187.40.30.186 0:0:0:0:0:ffff:bb28:1eba
187.40.30.187 0:0:0:0:0:ffff:bb28:1ebb
187.40.30.188 0:0:0:0:0:ffff:bb28:1ebc
187.40.30.189 0:0:0:0:0:ffff:bb28:1ebd
187.40.30.190 0:0:0:0:0:ffff:bb28:1ebe
187.40.30.191 0:0:0:0:0:ffff:bb28:1ebf
187.40.30.192 0:0:0:0:0:ffff:bb28:1ec0
187.40.30.193 0:0:0:0:0:ffff:bb28:1ec1
187.40.30.194 0:0:0:0:0:ffff:bb28:1ec2
187.40.30.195 0:0:0:0:0:ffff:bb28:1ec3
187.40.30.196 0:0:0:0:0:ffff:bb28:1ec4
187.40.30.197 0:0:0:0:0:ffff:bb28:1ec5
187.40.30.198 0:0:0:0:0:ffff:bb28:1ec6
187.40.30.199 0:0:0:0:0:ffff:bb28:1ec7
187.40.30.200 0:0:0:0:0:ffff:bb28:1ec8
187.40.30.201 0:0:0:0:0:ffff:bb28:1ec9
187.40.30.202 0:0:0:0:0:ffff:bb28:1eca
187.40.30.203 0:0:0:0:0:ffff:bb28:1ecb
187.40.30.204 0:0:0:0:0:ffff:bb28:1ecc
187.40.30.205 0:0:0:0:0:ffff:bb28:1ecd
187.40.30.206 0:0:0:0:0:ffff:bb28:1ece
187.40.30.207 0:0:0:0:0:ffff:bb28:1ecf
187.40.30.208 0:0:0:0:0:ffff:bb28:1ed0
187.40.30.209 0:0:0:0:0:ffff:bb28:1ed1
187.40.30.210 0:0:0:0:0:ffff:bb28:1ed2
187.40.30.211 0:0:0:0:0:ffff:bb28:1ed3
187.40.30.212 0:0:0:0:0:ffff:bb28:1ed4
187.40.30.213 0:0:0:0:0:ffff:bb28:1ed5
187.40.30.214 0:0:0:0:0:ffff:bb28:1ed6
187.40.30.215 0:0:0:0:0:ffff:bb28:1ed7
187.40.30.216 0:0:0:0:0:ffff:bb28:1ed8
187.40.30.217 0:0:0:0:0:ffff:bb28:1ed9
187.40.30.218 0:0:0:0:0:ffff:bb28:1eda
187.40.30.219 0:0:0:0:0:ffff:bb28:1edb
187.40.30.220 0:0:0:0:0:ffff:bb28:1edc
187.40.30.221 0:0:0:0:0:ffff:bb28:1edd
187.40.30.222 0:0:0:0:0:ffff:bb28:1ede
187.40.30.223 0:0:0:0:0:ffff:bb28:1edf
187.40.30.224 0:0:0:0:0:ffff:bb28:1ee0
187.40.30.225 0:0:0:0:0:ffff:bb28:1ee1
187.40.30.226 0:0:0:0:0:ffff:bb28:1ee2
187.40.30.227 0:0:0:0:0:ffff:bb28:1ee3
187.40.30.228 0:0:0:0:0:ffff:bb28:1ee4
187.40.30.229 0:0:0:0:0:ffff:bb28:1ee5
187.40.30.230 0:0:0:0:0:ffff:bb28:1ee6
187.40.30.231 0:0:0:0:0:ffff:bb28:1ee7
187.40.30.232 0:0:0:0:0:ffff:bb28:1ee8
187.40.30.233 0:0:0:0:0:ffff:bb28:1ee9
187.40.30.234 0:0:0:0:0:ffff:bb28:1eea
187.40.30.235 0:0:0:0:0:ffff:bb28:1eeb
187.40.30.236 0:0:0:0:0:ffff:bb28:1eec
187.40.30.237 0:0:0:0:0:ffff:bb28:1eed
187.40.30.238 0:0:0:0:0:ffff:bb28:1eee
187.40.30.239 0:0:0:0:0:ffff:bb28:1eef
187.40.30.240 0:0:0:0:0:ffff:bb28:1ef0
187.40.30.241 0:0:0:0:0:ffff:bb28:1ef1
187.40.30.242 0:0:0:0:0:ffff:bb28:1ef2
187.40.30.243 0:0:0:0:0:ffff:bb28:1ef3
187.40.30.244 0:0:0:0:0:ffff:bb28:1ef4
187.40.30.245 0:0:0:0:0:ffff:bb28:1ef5
187.40.30.246 0:0:0:0:0:ffff:bb28:1ef6
187.40.30.247 0:0:0:0:0:ffff:bb28:1ef7
187.40.30.248 0:0:0:0:0:ffff:bb28:1ef8
187.40.30.249 0:0:0:0:0:ffff:bb28:1ef9
187.40.30.250 0:0:0:0:0:ffff:bb28:1efa
187.40.30.251 0:0:0:0:0:ffff:bb28:1efb
187.40.30.252 0:0:0:0:0:ffff:bb28:1efc
187.40.30.253 0:0:0:0:0:ffff:bb28:1efd
187.40.30.254 0:0:0:0:0:ffff:bb28:1efe
187.40.30.255 0:0:0:0:0:ffff:bb28:1eff


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.