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
21.15.190.1 0:0:0:0:0:ffff:150f:be01
21.15.190.2 0:0:0:0:0:ffff:150f:be02
21.15.190.3 0:0:0:0:0:ffff:150f:be03
21.15.190.4 0:0:0:0:0:ffff:150f:be04
21.15.190.5 0:0:0:0:0:ffff:150f:be05
21.15.190.6 0:0:0:0:0:ffff:150f:be06
21.15.190.7 0:0:0:0:0:ffff:150f:be07
21.15.190.8 0:0:0:0:0:ffff:150f:be08
21.15.190.9 0:0:0:0:0:ffff:150f:be09
21.15.190.10 0:0:0:0:0:ffff:150f:be0a
21.15.190.11 0:0:0:0:0:ffff:150f:be0b
21.15.190.12 0:0:0:0:0:ffff:150f:be0c
21.15.190.13 0:0:0:0:0:ffff:150f:be0d
21.15.190.14 0:0:0:0:0:ffff:150f:be0e
21.15.190.15 0:0:0:0:0:ffff:150f:be0f
21.15.190.16 0:0:0:0:0:ffff:150f:be10
21.15.190.17 0:0:0:0:0:ffff:150f:be11
21.15.190.18 0:0:0:0:0:ffff:150f:be12
21.15.190.19 0:0:0:0:0:ffff:150f:be13
21.15.190.20 0:0:0:0:0:ffff:150f:be14
21.15.190.21 0:0:0:0:0:ffff:150f:be15
21.15.190.22 0:0:0:0:0:ffff:150f:be16
21.15.190.23 0:0:0:0:0:ffff:150f:be17
21.15.190.24 0:0:0:0:0:ffff:150f:be18
21.15.190.25 0:0:0:0:0:ffff:150f:be19
21.15.190.26 0:0:0:0:0:ffff:150f:be1a
21.15.190.27 0:0:0:0:0:ffff:150f:be1b
21.15.190.28 0:0:0:0:0:ffff:150f:be1c
21.15.190.29 0:0:0:0:0:ffff:150f:be1d
21.15.190.30 0:0:0:0:0:ffff:150f:be1e
21.15.190.31 0:0:0:0:0:ffff:150f:be1f
21.15.190.32 0:0:0:0:0:ffff:150f:be20
21.15.190.33 0:0:0:0:0:ffff:150f:be21
21.15.190.34 0:0:0:0:0:ffff:150f:be22
21.15.190.35 0:0:0:0:0:ffff:150f:be23
21.15.190.36 0:0:0:0:0:ffff:150f:be24
21.15.190.37 0:0:0:0:0:ffff:150f:be25
21.15.190.38 0:0:0:0:0:ffff:150f:be26
21.15.190.39 0:0:0:0:0:ffff:150f:be27
21.15.190.40 0:0:0:0:0:ffff:150f:be28
21.15.190.41 0:0:0:0:0:ffff:150f:be29
21.15.190.42 0:0:0:0:0:ffff:150f:be2a
21.15.190.43 0:0:0:0:0:ffff:150f:be2b
21.15.190.44 0:0:0:0:0:ffff:150f:be2c
21.15.190.45 0:0:0:0:0:ffff:150f:be2d
21.15.190.46 0:0:0:0:0:ffff:150f:be2e
21.15.190.47 0:0:0:0:0:ffff:150f:be2f
21.15.190.48 0:0:0:0:0:ffff:150f:be30
21.15.190.49 0:0:0:0:0:ffff:150f:be31
21.15.190.50 0:0:0:0:0:ffff:150f:be32
21.15.190.51 0:0:0:0:0:ffff:150f:be33
21.15.190.52 0:0:0:0:0:ffff:150f:be34
21.15.190.53 0:0:0:0:0:ffff:150f:be35
21.15.190.54 0:0:0:0:0:ffff:150f:be36
21.15.190.55 0:0:0:0:0:ffff:150f:be37
21.15.190.56 0:0:0:0:0:ffff:150f:be38
21.15.190.57 0:0:0:0:0:ffff:150f:be39
21.15.190.58 0:0:0:0:0:ffff:150f:be3a
21.15.190.59 0:0:0:0:0:ffff:150f:be3b
21.15.190.60 0:0:0:0:0:ffff:150f:be3c


21.15.190.61 0:0:0:0:0:ffff:150f:be3d
21.15.190.62 0:0:0:0:0:ffff:150f:be3e
21.15.190.63 0:0:0:0:0:ffff:150f:be3f
21.15.190.64 0:0:0:0:0:ffff:150f:be40
21.15.190.65 0:0:0:0:0:ffff:150f:be41
21.15.190.66 0:0:0:0:0:ffff:150f:be42
21.15.190.67 0:0:0:0:0:ffff:150f:be43
21.15.190.68 0:0:0:0:0:ffff:150f:be44
21.15.190.69 0:0:0:0:0:ffff:150f:be45
21.15.190.70 0:0:0:0:0:ffff:150f:be46
21.15.190.71 0:0:0:0:0:ffff:150f:be47
21.15.190.72 0:0:0:0:0:ffff:150f:be48
21.15.190.73 0:0:0:0:0:ffff:150f:be49
21.15.190.74 0:0:0:0:0:ffff:150f:be4a
21.15.190.75 0:0:0:0:0:ffff:150f:be4b
21.15.190.76 0:0:0:0:0:ffff:150f:be4c
21.15.190.77 0:0:0:0:0:ffff:150f:be4d
21.15.190.78 0:0:0:0:0:ffff:150f:be4e
21.15.190.79 0:0:0:0:0:ffff:150f:be4f
21.15.190.80 0:0:0:0:0:ffff:150f:be50
21.15.190.81 0:0:0:0:0:ffff:150f:be51
21.15.190.82 0:0:0:0:0:ffff:150f:be52
21.15.190.83 0:0:0:0:0:ffff:150f:be53
21.15.190.84 0:0:0:0:0:ffff:150f:be54
21.15.190.85 0:0:0:0:0:ffff:150f:be55
21.15.190.86 0:0:0:0:0:ffff:150f:be56
21.15.190.87 0:0:0:0:0:ffff:150f:be57
21.15.190.88 0:0:0:0:0:ffff:150f:be58
21.15.190.89 0:0:0:0:0:ffff:150f:be59
21.15.190.90 0:0:0:0:0:ffff:150f:be5a
21.15.190.91 0:0:0:0:0:ffff:150f:be5b
21.15.190.92 0:0:0:0:0:ffff:150f:be5c
21.15.190.93 0:0:0:0:0:ffff:150f:be5d
21.15.190.94 0:0:0:0:0:ffff:150f:be5e
21.15.190.95 0:0:0:0:0:ffff:150f:be5f
21.15.190.96 0:0:0:0:0:ffff:150f:be60
21.15.190.97 0:0:0:0:0:ffff:150f:be61
21.15.190.98 0:0:0:0:0:ffff:150f:be62
21.15.190.99 0:0:0:0:0:ffff:150f:be63
21.15.190.100 0:0:0:0:0:ffff:150f:be64
21.15.190.101 0:0:0:0:0:ffff:150f:be65
21.15.190.102 0:0:0:0:0:ffff:150f:be66
21.15.190.103 0:0:0:0:0:ffff:150f:be67
21.15.190.104 0:0:0:0:0:ffff:150f:be68
21.15.190.105 0:0:0:0:0:ffff:150f:be69
21.15.190.106 0:0:0:0:0:ffff:150f:be6a
21.15.190.107 0:0:0:0:0:ffff:150f:be6b
21.15.190.108 0:0:0:0:0:ffff:150f:be6c
21.15.190.109 0:0:0:0:0:ffff:150f:be6d
21.15.190.110 0:0:0:0:0:ffff:150f:be6e
21.15.190.111 0:0:0:0:0:ffff:150f:be6f
21.15.190.112 0:0:0:0:0:ffff:150f:be70
21.15.190.113 0:0:0:0:0:ffff:150f:be71
21.15.190.114 0:0:0:0:0:ffff:150f:be72
21.15.190.115 0:0:0:0:0:ffff:150f:be73
21.15.190.116 0:0:0:0:0:ffff:150f:be74
21.15.190.117 0:0:0:0:0:ffff:150f:be75
21.15.190.118 0:0:0:0:0:ffff:150f:be76
21.15.190.119 0:0:0:0:0:ffff:150f:be77
21.15.190.120 0:0:0:0:0:ffff:150f:be78


21.15.190.121 0:0:0:0:0:ffff:150f:be79
21.15.190.122 0:0:0:0:0:ffff:150f:be7a
21.15.190.123 0:0:0:0:0:ffff:150f:be7b
21.15.190.124 0:0:0:0:0:ffff:150f:be7c
21.15.190.125 0:0:0:0:0:ffff:150f:be7d
21.15.190.126 0:0:0:0:0:ffff:150f:be7e
21.15.190.127 0:0:0:0:0:ffff:150f:be7f
21.15.190.128 0:0:0:0:0:ffff:150f:be80
21.15.190.129 0:0:0:0:0:ffff:150f:be81
21.15.190.130 0:0:0:0:0:ffff:150f:be82
21.15.190.131 0:0:0:0:0:ffff:150f:be83
21.15.190.132 0:0:0:0:0:ffff:150f:be84
21.15.190.133 0:0:0:0:0:ffff:150f:be85
21.15.190.134 0:0:0:0:0:ffff:150f:be86
21.15.190.135 0:0:0:0:0:ffff:150f:be87
21.15.190.136 0:0:0:0:0:ffff:150f:be88
21.15.190.137 0:0:0:0:0:ffff:150f:be89
21.15.190.138 0:0:0:0:0:ffff:150f:be8a
21.15.190.139 0:0:0:0:0:ffff:150f:be8b
21.15.190.140 0:0:0:0:0:ffff:150f:be8c
21.15.190.141 0:0:0:0:0:ffff:150f:be8d
21.15.190.142 0:0:0:0:0:ffff:150f:be8e
21.15.190.143 0:0:0:0:0:ffff:150f:be8f
21.15.190.144 0:0:0:0:0:ffff:150f:be90
21.15.190.145 0:0:0:0:0:ffff:150f:be91
21.15.190.146 0:0:0:0:0:ffff:150f:be92
21.15.190.147 0:0:0:0:0:ffff:150f:be93
21.15.190.148 0:0:0:0:0:ffff:150f:be94
21.15.190.149 0:0:0:0:0:ffff:150f:be95
21.15.190.150 0:0:0:0:0:ffff:150f:be96
21.15.190.151 0:0:0:0:0:ffff:150f:be97
21.15.190.152 0:0:0:0:0:ffff:150f:be98
21.15.190.153 0:0:0:0:0:ffff:150f:be99
21.15.190.154 0:0:0:0:0:ffff:150f:be9a
21.15.190.155 0:0:0:0:0:ffff:150f:be9b
21.15.190.156 0:0:0:0:0:ffff:150f:be9c
21.15.190.157 0:0:0:0:0:ffff:150f:be9d
21.15.190.158 0:0:0:0:0:ffff:150f:be9e
21.15.190.159 0:0:0:0:0:ffff:150f:be9f
21.15.190.160 0:0:0:0:0:ffff:150f:bea0
21.15.190.161 0:0:0:0:0:ffff:150f:bea1
21.15.190.162 0:0:0:0:0:ffff:150f:bea2
21.15.190.163 0:0:0:0:0:ffff:150f:bea3
21.15.190.164 0:0:0:0:0:ffff:150f:bea4
21.15.190.165 0:0:0:0:0:ffff:150f:bea5
21.15.190.166 0:0:0:0:0:ffff:150f:bea6
21.15.190.167 0:0:0:0:0:ffff:150f:bea7
21.15.190.168 0:0:0:0:0:ffff:150f:bea8
21.15.190.169 0:0:0:0:0:ffff:150f:bea9
21.15.190.170 0:0:0:0:0:ffff:150f:beaa
21.15.190.171 0:0:0:0:0:ffff:150f:beab
21.15.190.172 0:0:0:0:0:ffff:150f:beac
21.15.190.173 0:0:0:0:0:ffff:150f:bead
21.15.190.174 0:0:0:0:0:ffff:150f:beae
21.15.190.175 0:0:0:0:0:ffff:150f:beaf
21.15.190.176 0:0:0:0:0:ffff:150f:beb0
21.15.190.177 0:0:0:0:0:ffff:150f:beb1
21.15.190.178 0:0:0:0:0:ffff:150f:beb2
21.15.190.179 0:0:0:0:0:ffff:150f:beb3
21.15.190.180 0:0:0:0:0:ffff:150f:beb4


21.15.190.181 0:0:0:0:0:ffff:150f:beb5
21.15.190.182 0:0:0:0:0:ffff:150f:beb6
21.15.190.183 0:0:0:0:0:ffff:150f:beb7
21.15.190.184 0:0:0:0:0:ffff:150f:beb8
21.15.190.185 0:0:0:0:0:ffff:150f:beb9
21.15.190.186 0:0:0:0:0:ffff:150f:beba
21.15.190.187 0:0:0:0:0:ffff:150f:bebb
21.15.190.188 0:0:0:0:0:ffff:150f:bebc
21.15.190.189 0:0:0:0:0:ffff:150f:bebd
21.15.190.190 0:0:0:0:0:ffff:150f:bebe
21.15.190.191 0:0:0:0:0:ffff:150f:bebf
21.15.190.192 0:0:0:0:0:ffff:150f:bec0
21.15.190.193 0:0:0:0:0:ffff:150f:bec1
21.15.190.194 0:0:0:0:0:ffff:150f:bec2
21.15.190.195 0:0:0:0:0:ffff:150f:bec3
21.15.190.196 0:0:0:0:0:ffff:150f:bec4
21.15.190.197 0:0:0:0:0:ffff:150f:bec5
21.15.190.198 0:0:0:0:0:ffff:150f:bec6
21.15.190.199 0:0:0:0:0:ffff:150f:bec7
21.15.190.200 0:0:0:0:0:ffff:150f:bec8
21.15.190.201 0:0:0:0:0:ffff:150f:bec9
21.15.190.202 0:0:0:0:0:ffff:150f:beca
21.15.190.203 0:0:0:0:0:ffff:150f:becb
21.15.190.204 0:0:0:0:0:ffff:150f:becc
21.15.190.205 0:0:0:0:0:ffff:150f:becd
21.15.190.206 0:0:0:0:0:ffff:150f:bece
21.15.190.207 0:0:0:0:0:ffff:150f:becf
21.15.190.208 0:0:0:0:0:ffff:150f:bed0
21.15.190.209 0:0:0:0:0:ffff:150f:bed1
21.15.190.210 0:0:0:0:0:ffff:150f:bed2
21.15.190.211 0:0:0:0:0:ffff:150f:bed3
21.15.190.212 0:0:0:0:0:ffff:150f:bed4
21.15.190.213 0:0:0:0:0:ffff:150f:bed5
21.15.190.214 0:0:0:0:0:ffff:150f:bed6
21.15.190.215 0:0:0:0:0:ffff:150f:bed7
21.15.190.216 0:0:0:0:0:ffff:150f:bed8
21.15.190.217 0:0:0:0:0:ffff:150f:bed9
21.15.190.218 0:0:0:0:0:ffff:150f:beda
21.15.190.219 0:0:0:0:0:ffff:150f:bedb
21.15.190.220 0:0:0:0:0:ffff:150f:bedc
21.15.190.221 0:0:0:0:0:ffff:150f:bedd
21.15.190.222 0:0:0:0:0:ffff:150f:bede
21.15.190.223 0:0:0:0:0:ffff:150f:bedf
21.15.190.224 0:0:0:0:0:ffff:150f:bee0
21.15.190.225 0:0:0:0:0:ffff:150f:bee1
21.15.190.226 0:0:0:0:0:ffff:150f:bee2
21.15.190.227 0:0:0:0:0:ffff:150f:bee3
21.15.190.228 0:0:0:0:0:ffff:150f:bee4
21.15.190.229 0:0:0:0:0:ffff:150f:bee5
21.15.190.230 0:0:0:0:0:ffff:150f:bee6
21.15.190.231 0:0:0:0:0:ffff:150f:bee7
21.15.190.232 0:0:0:0:0:ffff:150f:bee8
21.15.190.233 0:0:0:0:0:ffff:150f:bee9
21.15.190.234 0:0:0:0:0:ffff:150f:beea
21.15.190.235 0:0:0:0:0:ffff:150f:beeb
21.15.190.236 0:0:0:0:0:ffff:150f:beec
21.15.190.237 0:0:0:0:0:ffff:150f:beed
21.15.190.238 0:0:0:0:0:ffff:150f:beee
21.15.190.239 0:0:0:0:0:ffff:150f:beef
21.15.190.240 0:0:0:0:0:ffff:150f:bef0
21.15.190.241 0:0:0:0:0:ffff:150f:bef1
21.15.190.242 0:0:0:0:0:ffff:150f:bef2
21.15.190.243 0:0:0:0:0:ffff:150f:bef3
21.15.190.244 0:0:0:0:0:ffff:150f:bef4
21.15.190.245 0:0:0:0:0:ffff:150f:bef5
21.15.190.246 0:0:0:0:0:ffff:150f:bef6
21.15.190.247 0:0:0:0:0:ffff:150f:bef7
21.15.190.248 0:0:0:0:0:ffff:150f:bef8
21.15.190.249 0:0:0:0:0:ffff:150f:bef9
21.15.190.250 0:0:0:0:0:ffff:150f:befa
21.15.190.251 0:0:0:0:0:ffff:150f:befb
21.15.190.252 0:0:0:0:0:ffff:150f:befc
21.15.190.253 0:0:0:0:0:ffff:150f:befd
21.15.190.254 0:0:0:0:0:ffff:150f:befe
21.15.190.255 0:0:0:0:0:ffff:150f:beff


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.