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
191.15.42.1 0:0:0:0:0:ffff:bf0f:2a01
191.15.42.2 0:0:0:0:0:ffff:bf0f:2a02
191.15.42.3 0:0:0:0:0:ffff:bf0f:2a03
191.15.42.4 0:0:0:0:0:ffff:bf0f:2a04
191.15.42.5 0:0:0:0:0:ffff:bf0f:2a05
191.15.42.6 0:0:0:0:0:ffff:bf0f:2a06
191.15.42.7 0:0:0:0:0:ffff:bf0f:2a07
191.15.42.8 0:0:0:0:0:ffff:bf0f:2a08
191.15.42.9 0:0:0:0:0:ffff:bf0f:2a09
191.15.42.10 0:0:0:0:0:ffff:bf0f:2a0a
191.15.42.11 0:0:0:0:0:ffff:bf0f:2a0b
191.15.42.12 0:0:0:0:0:ffff:bf0f:2a0c
191.15.42.13 0:0:0:0:0:ffff:bf0f:2a0d
191.15.42.14 0:0:0:0:0:ffff:bf0f:2a0e
191.15.42.15 0:0:0:0:0:ffff:bf0f:2a0f
191.15.42.16 0:0:0:0:0:ffff:bf0f:2a10
191.15.42.17 0:0:0:0:0:ffff:bf0f:2a11
191.15.42.18 0:0:0:0:0:ffff:bf0f:2a12
191.15.42.19 0:0:0:0:0:ffff:bf0f:2a13
191.15.42.20 0:0:0:0:0:ffff:bf0f:2a14
191.15.42.21 0:0:0:0:0:ffff:bf0f:2a15
191.15.42.22 0:0:0:0:0:ffff:bf0f:2a16
191.15.42.23 0:0:0:0:0:ffff:bf0f:2a17
191.15.42.24 0:0:0:0:0:ffff:bf0f:2a18
191.15.42.25 0:0:0:0:0:ffff:bf0f:2a19
191.15.42.26 0:0:0:0:0:ffff:bf0f:2a1a
191.15.42.27 0:0:0:0:0:ffff:bf0f:2a1b
191.15.42.28 0:0:0:0:0:ffff:bf0f:2a1c
191.15.42.29 0:0:0:0:0:ffff:bf0f:2a1d
191.15.42.30 0:0:0:0:0:ffff:bf0f:2a1e
191.15.42.31 0:0:0:0:0:ffff:bf0f:2a1f
191.15.42.32 0:0:0:0:0:ffff:bf0f:2a20
191.15.42.33 0:0:0:0:0:ffff:bf0f:2a21
191.15.42.34 0:0:0:0:0:ffff:bf0f:2a22
191.15.42.35 0:0:0:0:0:ffff:bf0f:2a23
191.15.42.36 0:0:0:0:0:ffff:bf0f:2a24
191.15.42.37 0:0:0:0:0:ffff:bf0f:2a25
191.15.42.38 0:0:0:0:0:ffff:bf0f:2a26
191.15.42.39 0:0:0:0:0:ffff:bf0f:2a27
191.15.42.40 0:0:0:0:0:ffff:bf0f:2a28
191.15.42.41 0:0:0:0:0:ffff:bf0f:2a29
191.15.42.42 0:0:0:0:0:ffff:bf0f:2a2a
191.15.42.43 0:0:0:0:0:ffff:bf0f:2a2b
191.15.42.44 0:0:0:0:0:ffff:bf0f:2a2c
191.15.42.45 0:0:0:0:0:ffff:bf0f:2a2d
191.15.42.46 0:0:0:0:0:ffff:bf0f:2a2e
191.15.42.47 0:0:0:0:0:ffff:bf0f:2a2f
191.15.42.48 0:0:0:0:0:ffff:bf0f:2a30
191.15.42.49 0:0:0:0:0:ffff:bf0f:2a31
191.15.42.50 0:0:0:0:0:ffff:bf0f:2a32
191.15.42.51 0:0:0:0:0:ffff:bf0f:2a33
191.15.42.52 0:0:0:0:0:ffff:bf0f:2a34
191.15.42.53 0:0:0:0:0:ffff:bf0f:2a35
191.15.42.54 0:0:0:0:0:ffff:bf0f:2a36
191.15.42.55 0:0:0:0:0:ffff:bf0f:2a37
191.15.42.56 0:0:0:0:0:ffff:bf0f:2a38
191.15.42.57 0:0:0:0:0:ffff:bf0f:2a39
191.15.42.58 0:0:0:0:0:ffff:bf0f:2a3a
191.15.42.59 0:0:0:0:0:ffff:bf0f:2a3b
191.15.42.60 0:0:0:0:0:ffff:bf0f:2a3c


191.15.42.61 0:0:0:0:0:ffff:bf0f:2a3d
191.15.42.62 0:0:0:0:0:ffff:bf0f:2a3e
191.15.42.63 0:0:0:0:0:ffff:bf0f:2a3f
191.15.42.64 0:0:0:0:0:ffff:bf0f:2a40
191.15.42.65 0:0:0:0:0:ffff:bf0f:2a41
191.15.42.66 0:0:0:0:0:ffff:bf0f:2a42
191.15.42.67 0:0:0:0:0:ffff:bf0f:2a43
191.15.42.68 0:0:0:0:0:ffff:bf0f:2a44
191.15.42.69 0:0:0:0:0:ffff:bf0f:2a45
191.15.42.70 0:0:0:0:0:ffff:bf0f:2a46
191.15.42.71 0:0:0:0:0:ffff:bf0f:2a47
191.15.42.72 0:0:0:0:0:ffff:bf0f:2a48
191.15.42.73 0:0:0:0:0:ffff:bf0f:2a49
191.15.42.74 0:0:0:0:0:ffff:bf0f:2a4a
191.15.42.75 0:0:0:0:0:ffff:bf0f:2a4b
191.15.42.76 0:0:0:0:0:ffff:bf0f:2a4c
191.15.42.77 0:0:0:0:0:ffff:bf0f:2a4d
191.15.42.78 0:0:0:0:0:ffff:bf0f:2a4e
191.15.42.79 0:0:0:0:0:ffff:bf0f:2a4f
191.15.42.80 0:0:0:0:0:ffff:bf0f:2a50
191.15.42.81 0:0:0:0:0:ffff:bf0f:2a51
191.15.42.82 0:0:0:0:0:ffff:bf0f:2a52
191.15.42.83 0:0:0:0:0:ffff:bf0f:2a53
191.15.42.84 0:0:0:0:0:ffff:bf0f:2a54
191.15.42.85 0:0:0:0:0:ffff:bf0f:2a55
191.15.42.86 0:0:0:0:0:ffff:bf0f:2a56
191.15.42.87 0:0:0:0:0:ffff:bf0f:2a57
191.15.42.88 0:0:0:0:0:ffff:bf0f:2a58
191.15.42.89 0:0:0:0:0:ffff:bf0f:2a59
191.15.42.90 0:0:0:0:0:ffff:bf0f:2a5a
191.15.42.91 0:0:0:0:0:ffff:bf0f:2a5b
191.15.42.92 0:0:0:0:0:ffff:bf0f:2a5c
191.15.42.93 0:0:0:0:0:ffff:bf0f:2a5d
191.15.42.94 0:0:0:0:0:ffff:bf0f:2a5e
191.15.42.95 0:0:0:0:0:ffff:bf0f:2a5f
191.15.42.96 0:0:0:0:0:ffff:bf0f:2a60
191.15.42.97 0:0:0:0:0:ffff:bf0f:2a61
191.15.42.98 0:0:0:0:0:ffff:bf0f:2a62
191.15.42.99 0:0:0:0:0:ffff:bf0f:2a63
191.15.42.100 0:0:0:0:0:ffff:bf0f:2a64
191.15.42.101 0:0:0:0:0:ffff:bf0f:2a65
191.15.42.102 0:0:0:0:0:ffff:bf0f:2a66
191.15.42.103 0:0:0:0:0:ffff:bf0f:2a67
191.15.42.104 0:0:0:0:0:ffff:bf0f:2a68
191.15.42.105 0:0:0:0:0:ffff:bf0f:2a69
191.15.42.106 0:0:0:0:0:ffff:bf0f:2a6a
191.15.42.107 0:0:0:0:0:ffff:bf0f:2a6b
191.15.42.108 0:0:0:0:0:ffff:bf0f:2a6c
191.15.42.109 0:0:0:0:0:ffff:bf0f:2a6d
191.15.42.110 0:0:0:0:0:ffff:bf0f:2a6e
191.15.42.111 0:0:0:0:0:ffff:bf0f:2a6f
191.15.42.112 0:0:0:0:0:ffff:bf0f:2a70
191.15.42.113 0:0:0:0:0:ffff:bf0f:2a71
191.15.42.114 0:0:0:0:0:ffff:bf0f:2a72
191.15.42.115 0:0:0:0:0:ffff:bf0f:2a73
191.15.42.116 0:0:0:0:0:ffff:bf0f:2a74
191.15.42.117 0:0:0:0:0:ffff:bf0f:2a75
191.15.42.118 0:0:0:0:0:ffff:bf0f:2a76
191.15.42.119 0:0:0:0:0:ffff:bf0f:2a77
191.15.42.120 0:0:0:0:0:ffff:bf0f:2a78


191.15.42.121 0:0:0:0:0:ffff:bf0f:2a79
191.15.42.122 0:0:0:0:0:ffff:bf0f:2a7a
191.15.42.123 0:0:0:0:0:ffff:bf0f:2a7b
191.15.42.124 0:0:0:0:0:ffff:bf0f:2a7c
191.15.42.125 0:0:0:0:0:ffff:bf0f:2a7d
191.15.42.126 0:0:0:0:0:ffff:bf0f:2a7e
191.15.42.127 0:0:0:0:0:ffff:bf0f:2a7f
191.15.42.128 0:0:0:0:0:ffff:bf0f:2a80
191.15.42.129 0:0:0:0:0:ffff:bf0f:2a81
191.15.42.130 0:0:0:0:0:ffff:bf0f:2a82
191.15.42.131 0:0:0:0:0:ffff:bf0f:2a83
191.15.42.132 0:0:0:0:0:ffff:bf0f:2a84
191.15.42.133 0:0:0:0:0:ffff:bf0f:2a85
191.15.42.134 0:0:0:0:0:ffff:bf0f:2a86
191.15.42.135 0:0:0:0:0:ffff:bf0f:2a87
191.15.42.136 0:0:0:0:0:ffff:bf0f:2a88
191.15.42.137 0:0:0:0:0:ffff:bf0f:2a89
191.15.42.138 0:0:0:0:0:ffff:bf0f:2a8a
191.15.42.139 0:0:0:0:0:ffff:bf0f:2a8b
191.15.42.140 0:0:0:0:0:ffff:bf0f:2a8c
191.15.42.141 0:0:0:0:0:ffff:bf0f:2a8d
191.15.42.142 0:0:0:0:0:ffff:bf0f:2a8e
191.15.42.143 0:0:0:0:0:ffff:bf0f:2a8f
191.15.42.144 0:0:0:0:0:ffff:bf0f:2a90
191.15.42.145 0:0:0:0:0:ffff:bf0f:2a91
191.15.42.146 0:0:0:0:0:ffff:bf0f:2a92
191.15.42.147 0:0:0:0:0:ffff:bf0f:2a93
191.15.42.148 0:0:0:0:0:ffff:bf0f:2a94
191.15.42.149 0:0:0:0:0:ffff:bf0f:2a95
191.15.42.150 0:0:0:0:0:ffff:bf0f:2a96
191.15.42.151 0:0:0:0:0:ffff:bf0f:2a97
191.15.42.152 0:0:0:0:0:ffff:bf0f:2a98
191.15.42.153 0:0:0:0:0:ffff:bf0f:2a99
191.15.42.154 0:0:0:0:0:ffff:bf0f:2a9a
191.15.42.155 0:0:0:0:0:ffff:bf0f:2a9b
191.15.42.156 0:0:0:0:0:ffff:bf0f:2a9c
191.15.42.157 0:0:0:0:0:ffff:bf0f:2a9d
191.15.42.158 0:0:0:0:0:ffff:bf0f:2a9e
191.15.42.159 0:0:0:0:0:ffff:bf0f:2a9f
191.15.42.160 0:0:0:0:0:ffff:bf0f:2aa0
191.15.42.161 0:0:0:0:0:ffff:bf0f:2aa1
191.15.42.162 0:0:0:0:0:ffff:bf0f:2aa2
191.15.42.163 0:0:0:0:0:ffff:bf0f:2aa3
191.15.42.164 0:0:0:0:0:ffff:bf0f:2aa4
191.15.42.165 0:0:0:0:0:ffff:bf0f:2aa5
191.15.42.166 0:0:0:0:0:ffff:bf0f:2aa6
191.15.42.167 0:0:0:0:0:ffff:bf0f:2aa7
191.15.42.168 0:0:0:0:0:ffff:bf0f:2aa8
191.15.42.169 0:0:0:0:0:ffff:bf0f:2aa9
191.15.42.170 0:0:0:0:0:ffff:bf0f:2aaa
191.15.42.171 0:0:0:0:0:ffff:bf0f:2aab
191.15.42.172 0:0:0:0:0:ffff:bf0f:2aac
191.15.42.173 0:0:0:0:0:ffff:bf0f:2aad
191.15.42.174 0:0:0:0:0:ffff:bf0f:2aae
191.15.42.175 0:0:0:0:0:ffff:bf0f:2aaf
191.15.42.176 0:0:0:0:0:ffff:bf0f:2ab0
191.15.42.177 0:0:0:0:0:ffff:bf0f:2ab1
191.15.42.178 0:0:0:0:0:ffff:bf0f:2ab2
191.15.42.179 0:0:0:0:0:ffff:bf0f:2ab3
191.15.42.180 0:0:0:0:0:ffff:bf0f:2ab4


191.15.42.181 0:0:0:0:0:ffff:bf0f:2ab5
191.15.42.182 0:0:0:0:0:ffff:bf0f:2ab6
191.15.42.183 0:0:0:0:0:ffff:bf0f:2ab7
191.15.42.184 0:0:0:0:0:ffff:bf0f:2ab8
191.15.42.185 0:0:0:0:0:ffff:bf0f:2ab9
191.15.42.186 0:0:0:0:0:ffff:bf0f:2aba
191.15.42.187 0:0:0:0:0:ffff:bf0f:2abb
191.15.42.188 0:0:0:0:0:ffff:bf0f:2abc
191.15.42.189 0:0:0:0:0:ffff:bf0f:2abd
191.15.42.190 0:0:0:0:0:ffff:bf0f:2abe
191.15.42.191 0:0:0:0:0:ffff:bf0f:2abf
191.15.42.192 0:0:0:0:0:ffff:bf0f:2ac0
191.15.42.193 0:0:0:0:0:ffff:bf0f:2ac1
191.15.42.194 0:0:0:0:0:ffff:bf0f:2ac2
191.15.42.195 0:0:0:0:0:ffff:bf0f:2ac3
191.15.42.196 0:0:0:0:0:ffff:bf0f:2ac4
191.15.42.197 0:0:0:0:0:ffff:bf0f:2ac5
191.15.42.198 0:0:0:0:0:ffff:bf0f:2ac6
191.15.42.199 0:0:0:0:0:ffff:bf0f:2ac7
191.15.42.200 0:0:0:0:0:ffff:bf0f:2ac8
191.15.42.201 0:0:0:0:0:ffff:bf0f:2ac9
191.15.42.202 0:0:0:0:0:ffff:bf0f:2aca
191.15.42.203 0:0:0:0:0:ffff:bf0f:2acb
191.15.42.204 0:0:0:0:0:ffff:bf0f:2acc
191.15.42.205 0:0:0:0:0:ffff:bf0f:2acd
191.15.42.206 0:0:0:0:0:ffff:bf0f:2ace
191.15.42.207 0:0:0:0:0:ffff:bf0f:2acf
191.15.42.208 0:0:0:0:0:ffff:bf0f:2ad0
191.15.42.209 0:0:0:0:0:ffff:bf0f:2ad1
191.15.42.210 0:0:0:0:0:ffff:bf0f:2ad2
191.15.42.211 0:0:0:0:0:ffff:bf0f:2ad3
191.15.42.212 0:0:0:0:0:ffff:bf0f:2ad4
191.15.42.213 0:0:0:0:0:ffff:bf0f:2ad5
191.15.42.214 0:0:0:0:0:ffff:bf0f:2ad6
191.15.42.215 0:0:0:0:0:ffff:bf0f:2ad7
191.15.42.216 0:0:0:0:0:ffff:bf0f:2ad8
191.15.42.217 0:0:0:0:0:ffff:bf0f:2ad9
191.15.42.218 0:0:0:0:0:ffff:bf0f:2ada
191.15.42.219 0:0:0:0:0:ffff:bf0f:2adb
191.15.42.220 0:0:0:0:0:ffff:bf0f:2adc
191.15.42.221 0:0:0:0:0:ffff:bf0f:2add
191.15.42.222 0:0:0:0:0:ffff:bf0f:2ade
191.15.42.223 0:0:0:0:0:ffff:bf0f:2adf
191.15.42.224 0:0:0:0:0:ffff:bf0f:2ae0
191.15.42.225 0:0:0:0:0:ffff:bf0f:2ae1
191.15.42.226 0:0:0:0:0:ffff:bf0f:2ae2
191.15.42.227 0:0:0:0:0:ffff:bf0f:2ae3
191.15.42.228 0:0:0:0:0:ffff:bf0f:2ae4
191.15.42.229 0:0:0:0:0:ffff:bf0f:2ae5
191.15.42.230 0:0:0:0:0:ffff:bf0f:2ae6
191.15.42.231 0:0:0:0:0:ffff:bf0f:2ae7
191.15.42.232 0:0:0:0:0:ffff:bf0f:2ae8
191.15.42.233 0:0:0:0:0:ffff:bf0f:2ae9
191.15.42.234 0:0:0:0:0:ffff:bf0f:2aea
191.15.42.235 0:0:0:0:0:ffff:bf0f:2aeb
191.15.42.236 0:0:0:0:0:ffff:bf0f:2aec
191.15.42.237 0:0:0:0:0:ffff:bf0f:2aed
191.15.42.238 0:0:0:0:0:ffff:bf0f:2aee
191.15.42.239 0:0:0:0:0:ffff:bf0f:2aef
191.15.42.240 0:0:0:0:0:ffff:bf0f:2af0
191.15.42.241 0:0:0:0:0:ffff:bf0f:2af1
191.15.42.242 0:0:0:0:0:ffff:bf0f:2af2
191.15.42.243 0:0:0:0:0:ffff:bf0f:2af3
191.15.42.244 0:0:0:0:0:ffff:bf0f:2af4
191.15.42.245 0:0:0:0:0:ffff:bf0f:2af5
191.15.42.246 0:0:0:0:0:ffff:bf0f:2af6
191.15.42.247 0:0:0:0:0:ffff:bf0f:2af7
191.15.42.248 0:0:0:0:0:ffff:bf0f:2af8
191.15.42.249 0:0:0:0:0:ffff:bf0f:2af9
191.15.42.250 0:0:0:0:0:ffff:bf0f:2afa
191.15.42.251 0:0:0:0:0:ffff:bf0f:2afb
191.15.42.252 0:0:0:0:0:ffff:bf0f:2afc
191.15.42.253 0:0:0:0:0:ffff:bf0f:2afd
191.15.42.254 0:0:0:0:0:ffff:bf0f:2afe
191.15.42.255 0:0:0:0:0:ffff:bf0f:2aff


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.