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
127.237.42.1 0:0:0:0:0:ffff:7fed:2a01
127.237.42.2 0:0:0:0:0:ffff:7fed:2a02
127.237.42.3 0:0:0:0:0:ffff:7fed:2a03
127.237.42.4 0:0:0:0:0:ffff:7fed:2a04
127.237.42.5 0:0:0:0:0:ffff:7fed:2a05
127.237.42.6 0:0:0:0:0:ffff:7fed:2a06
127.237.42.7 0:0:0:0:0:ffff:7fed:2a07
127.237.42.8 0:0:0:0:0:ffff:7fed:2a08
127.237.42.9 0:0:0:0:0:ffff:7fed:2a09
127.237.42.10 0:0:0:0:0:ffff:7fed:2a0a
127.237.42.11 0:0:0:0:0:ffff:7fed:2a0b
127.237.42.12 0:0:0:0:0:ffff:7fed:2a0c
127.237.42.13 0:0:0:0:0:ffff:7fed:2a0d
127.237.42.14 0:0:0:0:0:ffff:7fed:2a0e
127.237.42.15 0:0:0:0:0:ffff:7fed:2a0f
127.237.42.16 0:0:0:0:0:ffff:7fed:2a10
127.237.42.17 0:0:0:0:0:ffff:7fed:2a11
127.237.42.18 0:0:0:0:0:ffff:7fed:2a12
127.237.42.19 0:0:0:0:0:ffff:7fed:2a13
127.237.42.20 0:0:0:0:0:ffff:7fed:2a14
127.237.42.21 0:0:0:0:0:ffff:7fed:2a15
127.237.42.22 0:0:0:0:0:ffff:7fed:2a16
127.237.42.23 0:0:0:0:0:ffff:7fed:2a17
127.237.42.24 0:0:0:0:0:ffff:7fed:2a18
127.237.42.25 0:0:0:0:0:ffff:7fed:2a19
127.237.42.26 0:0:0:0:0:ffff:7fed:2a1a
127.237.42.27 0:0:0:0:0:ffff:7fed:2a1b
127.237.42.28 0:0:0:0:0:ffff:7fed:2a1c
127.237.42.29 0:0:0:0:0:ffff:7fed:2a1d
127.237.42.30 0:0:0:0:0:ffff:7fed:2a1e
127.237.42.31 0:0:0:0:0:ffff:7fed:2a1f
127.237.42.32 0:0:0:0:0:ffff:7fed:2a20
127.237.42.33 0:0:0:0:0:ffff:7fed:2a21
127.237.42.34 0:0:0:0:0:ffff:7fed:2a22
127.237.42.35 0:0:0:0:0:ffff:7fed:2a23
127.237.42.36 0:0:0:0:0:ffff:7fed:2a24
127.237.42.37 0:0:0:0:0:ffff:7fed:2a25
127.237.42.38 0:0:0:0:0:ffff:7fed:2a26
127.237.42.39 0:0:0:0:0:ffff:7fed:2a27
127.237.42.40 0:0:0:0:0:ffff:7fed:2a28
127.237.42.41 0:0:0:0:0:ffff:7fed:2a29
127.237.42.42 0:0:0:0:0:ffff:7fed:2a2a
127.237.42.43 0:0:0:0:0:ffff:7fed:2a2b
127.237.42.44 0:0:0:0:0:ffff:7fed:2a2c
127.237.42.45 0:0:0:0:0:ffff:7fed:2a2d
127.237.42.46 0:0:0:0:0:ffff:7fed:2a2e
127.237.42.47 0:0:0:0:0:ffff:7fed:2a2f
127.237.42.48 0:0:0:0:0:ffff:7fed:2a30
127.237.42.49 0:0:0:0:0:ffff:7fed:2a31
127.237.42.50 0:0:0:0:0:ffff:7fed:2a32
127.237.42.51 0:0:0:0:0:ffff:7fed:2a33
127.237.42.52 0:0:0:0:0:ffff:7fed:2a34
127.237.42.53 0:0:0:0:0:ffff:7fed:2a35
127.237.42.54 0:0:0:0:0:ffff:7fed:2a36
127.237.42.55 0:0:0:0:0:ffff:7fed:2a37
127.237.42.56 0:0:0:0:0:ffff:7fed:2a38
127.237.42.57 0:0:0:0:0:ffff:7fed:2a39
127.237.42.58 0:0:0:0:0:ffff:7fed:2a3a
127.237.42.59 0:0:0:0:0:ffff:7fed:2a3b
127.237.42.60 0:0:0:0:0:ffff:7fed:2a3c


127.237.42.61 0:0:0:0:0:ffff:7fed:2a3d
127.237.42.62 0:0:0:0:0:ffff:7fed:2a3e
127.237.42.63 0:0:0:0:0:ffff:7fed:2a3f
127.237.42.64 0:0:0:0:0:ffff:7fed:2a40
127.237.42.65 0:0:0:0:0:ffff:7fed:2a41
127.237.42.66 0:0:0:0:0:ffff:7fed:2a42
127.237.42.67 0:0:0:0:0:ffff:7fed:2a43
127.237.42.68 0:0:0:0:0:ffff:7fed:2a44
127.237.42.69 0:0:0:0:0:ffff:7fed:2a45
127.237.42.70 0:0:0:0:0:ffff:7fed:2a46
127.237.42.71 0:0:0:0:0:ffff:7fed:2a47
127.237.42.72 0:0:0:0:0:ffff:7fed:2a48
127.237.42.73 0:0:0:0:0:ffff:7fed:2a49
127.237.42.74 0:0:0:0:0:ffff:7fed:2a4a
127.237.42.75 0:0:0:0:0:ffff:7fed:2a4b
127.237.42.76 0:0:0:0:0:ffff:7fed:2a4c
127.237.42.77 0:0:0:0:0:ffff:7fed:2a4d
127.237.42.78 0:0:0:0:0:ffff:7fed:2a4e
127.237.42.79 0:0:0:0:0:ffff:7fed:2a4f
127.237.42.80 0:0:0:0:0:ffff:7fed:2a50
127.237.42.81 0:0:0:0:0:ffff:7fed:2a51
127.237.42.82 0:0:0:0:0:ffff:7fed:2a52
127.237.42.83 0:0:0:0:0:ffff:7fed:2a53
127.237.42.84 0:0:0:0:0:ffff:7fed:2a54
127.237.42.85 0:0:0:0:0:ffff:7fed:2a55
127.237.42.86 0:0:0:0:0:ffff:7fed:2a56
127.237.42.87 0:0:0:0:0:ffff:7fed:2a57
127.237.42.88 0:0:0:0:0:ffff:7fed:2a58
127.237.42.89 0:0:0:0:0:ffff:7fed:2a59
127.237.42.90 0:0:0:0:0:ffff:7fed:2a5a
127.237.42.91 0:0:0:0:0:ffff:7fed:2a5b
127.237.42.92 0:0:0:0:0:ffff:7fed:2a5c
127.237.42.93 0:0:0:0:0:ffff:7fed:2a5d
127.237.42.94 0:0:0:0:0:ffff:7fed:2a5e
127.237.42.95 0:0:0:0:0:ffff:7fed:2a5f
127.237.42.96 0:0:0:0:0:ffff:7fed:2a60
127.237.42.97 0:0:0:0:0:ffff:7fed:2a61
127.237.42.98 0:0:0:0:0:ffff:7fed:2a62
127.237.42.99 0:0:0:0:0:ffff:7fed:2a63
127.237.42.100 0:0:0:0:0:ffff:7fed:2a64
127.237.42.101 0:0:0:0:0:ffff:7fed:2a65
127.237.42.102 0:0:0:0:0:ffff:7fed:2a66
127.237.42.103 0:0:0:0:0:ffff:7fed:2a67
127.237.42.104 0:0:0:0:0:ffff:7fed:2a68
127.237.42.105 0:0:0:0:0:ffff:7fed:2a69
127.237.42.106 0:0:0:0:0:ffff:7fed:2a6a
127.237.42.107 0:0:0:0:0:ffff:7fed:2a6b
127.237.42.108 0:0:0:0:0:ffff:7fed:2a6c
127.237.42.109 0:0:0:0:0:ffff:7fed:2a6d
127.237.42.110 0:0:0:0:0:ffff:7fed:2a6e
127.237.42.111 0:0:0:0:0:ffff:7fed:2a6f
127.237.42.112 0:0:0:0:0:ffff:7fed:2a70
127.237.42.113 0:0:0:0:0:ffff:7fed:2a71
127.237.42.114 0:0:0:0:0:ffff:7fed:2a72
127.237.42.115 0:0:0:0:0:ffff:7fed:2a73
127.237.42.116 0:0:0:0:0:ffff:7fed:2a74
127.237.42.117 0:0:0:0:0:ffff:7fed:2a75
127.237.42.118 0:0:0:0:0:ffff:7fed:2a76
127.237.42.119 0:0:0:0:0:ffff:7fed:2a77
127.237.42.120 0:0:0:0:0:ffff:7fed:2a78


127.237.42.121 0:0:0:0:0:ffff:7fed:2a79
127.237.42.122 0:0:0:0:0:ffff:7fed:2a7a
127.237.42.123 0:0:0:0:0:ffff:7fed:2a7b
127.237.42.124 0:0:0:0:0:ffff:7fed:2a7c
127.237.42.125 0:0:0:0:0:ffff:7fed:2a7d
127.237.42.126 0:0:0:0:0:ffff:7fed:2a7e
127.237.42.127 0:0:0:0:0:ffff:7fed:2a7f
127.237.42.128 0:0:0:0:0:ffff:7fed:2a80
127.237.42.129 0:0:0:0:0:ffff:7fed:2a81
127.237.42.130 0:0:0:0:0:ffff:7fed:2a82
127.237.42.131 0:0:0:0:0:ffff:7fed:2a83
127.237.42.132 0:0:0:0:0:ffff:7fed:2a84
127.237.42.133 0:0:0:0:0:ffff:7fed:2a85
127.237.42.134 0:0:0:0:0:ffff:7fed:2a86
127.237.42.135 0:0:0:0:0:ffff:7fed:2a87
127.237.42.136 0:0:0:0:0:ffff:7fed:2a88
127.237.42.137 0:0:0:0:0:ffff:7fed:2a89
127.237.42.138 0:0:0:0:0:ffff:7fed:2a8a
127.237.42.139 0:0:0:0:0:ffff:7fed:2a8b
127.237.42.140 0:0:0:0:0:ffff:7fed:2a8c
127.237.42.141 0:0:0:0:0:ffff:7fed:2a8d
127.237.42.142 0:0:0:0:0:ffff:7fed:2a8e
127.237.42.143 0:0:0:0:0:ffff:7fed:2a8f
127.237.42.144 0:0:0:0:0:ffff:7fed:2a90
127.237.42.145 0:0:0:0:0:ffff:7fed:2a91
127.237.42.146 0:0:0:0:0:ffff:7fed:2a92
127.237.42.147 0:0:0:0:0:ffff:7fed:2a93
127.237.42.148 0:0:0:0:0:ffff:7fed:2a94
127.237.42.149 0:0:0:0:0:ffff:7fed:2a95
127.237.42.150 0:0:0:0:0:ffff:7fed:2a96
127.237.42.151 0:0:0:0:0:ffff:7fed:2a97
127.237.42.152 0:0:0:0:0:ffff:7fed:2a98
127.237.42.153 0:0:0:0:0:ffff:7fed:2a99
127.237.42.154 0:0:0:0:0:ffff:7fed:2a9a
127.237.42.155 0:0:0:0:0:ffff:7fed:2a9b
127.237.42.156 0:0:0:0:0:ffff:7fed:2a9c
127.237.42.157 0:0:0:0:0:ffff:7fed:2a9d
127.237.42.158 0:0:0:0:0:ffff:7fed:2a9e
127.237.42.159 0:0:0:0:0:ffff:7fed:2a9f
127.237.42.160 0:0:0:0:0:ffff:7fed:2aa0
127.237.42.161 0:0:0:0:0:ffff:7fed:2aa1
127.237.42.162 0:0:0:0:0:ffff:7fed:2aa2
127.237.42.163 0:0:0:0:0:ffff:7fed:2aa3
127.237.42.164 0:0:0:0:0:ffff:7fed:2aa4
127.237.42.165 0:0:0:0:0:ffff:7fed:2aa5
127.237.42.166 0:0:0:0:0:ffff:7fed:2aa6
127.237.42.167 0:0:0:0:0:ffff:7fed:2aa7
127.237.42.168 0:0:0:0:0:ffff:7fed:2aa8
127.237.42.169 0:0:0:0:0:ffff:7fed:2aa9
127.237.42.170 0:0:0:0:0:ffff:7fed:2aaa
127.237.42.171 0:0:0:0:0:ffff:7fed:2aab
127.237.42.172 0:0:0:0:0:ffff:7fed:2aac
127.237.42.173 0:0:0:0:0:ffff:7fed:2aad
127.237.42.174 0:0:0:0:0:ffff:7fed:2aae
127.237.42.175 0:0:0:0:0:ffff:7fed:2aaf
127.237.42.176 0:0:0:0:0:ffff:7fed:2ab0
127.237.42.177 0:0:0:0:0:ffff:7fed:2ab1
127.237.42.178 0:0:0:0:0:ffff:7fed:2ab2
127.237.42.179 0:0:0:0:0:ffff:7fed:2ab3
127.237.42.180 0:0:0:0:0:ffff:7fed:2ab4


127.237.42.181 0:0:0:0:0:ffff:7fed:2ab5
127.237.42.182 0:0:0:0:0:ffff:7fed:2ab6
127.237.42.183 0:0:0:0:0:ffff:7fed:2ab7
127.237.42.184 0:0:0:0:0:ffff:7fed:2ab8
127.237.42.185 0:0:0:0:0:ffff:7fed:2ab9
127.237.42.186 0:0:0:0:0:ffff:7fed:2aba
127.237.42.187 0:0:0:0:0:ffff:7fed:2abb
127.237.42.188 0:0:0:0:0:ffff:7fed:2abc
127.237.42.189 0:0:0:0:0:ffff:7fed:2abd
127.237.42.190 0:0:0:0:0:ffff:7fed:2abe
127.237.42.191 0:0:0:0:0:ffff:7fed:2abf
127.237.42.192 0:0:0:0:0:ffff:7fed:2ac0
127.237.42.193 0:0:0:0:0:ffff:7fed:2ac1
127.237.42.194 0:0:0:0:0:ffff:7fed:2ac2
127.237.42.195 0:0:0:0:0:ffff:7fed:2ac3
127.237.42.196 0:0:0:0:0:ffff:7fed:2ac4
127.237.42.197 0:0:0:0:0:ffff:7fed:2ac5
127.237.42.198 0:0:0:0:0:ffff:7fed:2ac6
127.237.42.199 0:0:0:0:0:ffff:7fed:2ac7
127.237.42.200 0:0:0:0:0:ffff:7fed:2ac8
127.237.42.201 0:0:0:0:0:ffff:7fed:2ac9
127.237.42.202 0:0:0:0:0:ffff:7fed:2aca
127.237.42.203 0:0:0:0:0:ffff:7fed:2acb
127.237.42.204 0:0:0:0:0:ffff:7fed:2acc
127.237.42.205 0:0:0:0:0:ffff:7fed:2acd
127.237.42.206 0:0:0:0:0:ffff:7fed:2ace
127.237.42.207 0:0:0:0:0:ffff:7fed:2acf
127.237.42.208 0:0:0:0:0:ffff:7fed:2ad0
127.237.42.209 0:0:0:0:0:ffff:7fed:2ad1
127.237.42.210 0:0:0:0:0:ffff:7fed:2ad2
127.237.42.211 0:0:0:0:0:ffff:7fed:2ad3
127.237.42.212 0:0:0:0:0:ffff:7fed:2ad4
127.237.42.213 0:0:0:0:0:ffff:7fed:2ad5
127.237.42.214 0:0:0:0:0:ffff:7fed:2ad6
127.237.42.215 0:0:0:0:0:ffff:7fed:2ad7
127.237.42.216 0:0:0:0:0:ffff:7fed:2ad8
127.237.42.217 0:0:0:0:0:ffff:7fed:2ad9
127.237.42.218 0:0:0:0:0:ffff:7fed:2ada
127.237.42.219 0:0:0:0:0:ffff:7fed:2adb
127.237.42.220 0:0:0:0:0:ffff:7fed:2adc
127.237.42.221 0:0:0:0:0:ffff:7fed:2add
127.237.42.222 0:0:0:0:0:ffff:7fed:2ade
127.237.42.223 0:0:0:0:0:ffff:7fed:2adf
127.237.42.224 0:0:0:0:0:ffff:7fed:2ae0
127.237.42.225 0:0:0:0:0:ffff:7fed:2ae1
127.237.42.226 0:0:0:0:0:ffff:7fed:2ae2
127.237.42.227 0:0:0:0:0:ffff:7fed:2ae3
127.237.42.228 0:0:0:0:0:ffff:7fed:2ae4
127.237.42.229 0:0:0:0:0:ffff:7fed:2ae5
127.237.42.230 0:0:0:0:0:ffff:7fed:2ae6
127.237.42.231 0:0:0:0:0:ffff:7fed:2ae7
127.237.42.232 0:0:0:0:0:ffff:7fed:2ae8
127.237.42.233 0:0:0:0:0:ffff:7fed:2ae9
127.237.42.234 0:0:0:0:0:ffff:7fed:2aea
127.237.42.235 0:0:0:0:0:ffff:7fed:2aeb
127.237.42.236 0:0:0:0:0:ffff:7fed:2aec
127.237.42.237 0:0:0:0:0:ffff:7fed:2aed
127.237.42.238 0:0:0:0:0:ffff:7fed:2aee
127.237.42.239 0:0:0:0:0:ffff:7fed:2aef
127.237.42.240 0:0:0:0:0:ffff:7fed:2af0
127.237.42.241 0:0:0:0:0:ffff:7fed:2af1
127.237.42.242 0:0:0:0:0:ffff:7fed:2af2
127.237.42.243 0:0:0:0:0:ffff:7fed:2af3
127.237.42.244 0:0:0:0:0:ffff:7fed:2af4
127.237.42.245 0:0:0:0:0:ffff:7fed:2af5
127.237.42.246 0:0:0:0:0:ffff:7fed:2af6
127.237.42.247 0:0:0:0:0:ffff:7fed:2af7
127.237.42.248 0:0:0:0:0:ffff:7fed:2af8
127.237.42.249 0:0:0:0:0:ffff:7fed:2af9
127.237.42.250 0:0:0:0:0:ffff:7fed:2afa
127.237.42.251 0:0:0:0:0:ffff:7fed:2afb
127.237.42.252 0:0:0:0:0:ffff:7fed:2afc
127.237.42.253 0:0:0:0:0:ffff:7fed:2afd
127.237.42.254 0:0:0:0:0:ffff:7fed:2afe
127.237.42.255 0:0:0:0:0:ffff:7fed: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.