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
67.21.16.1 0:0:0:0:0:ffff:4315:1001
67.21.16.2 0:0:0:0:0:ffff:4315:1002
67.21.16.3 0:0:0:0:0:ffff:4315:1003
67.21.16.4 0:0:0:0:0:ffff:4315:1004
67.21.16.5 0:0:0:0:0:ffff:4315:1005
67.21.16.6 0:0:0:0:0:ffff:4315:1006
67.21.16.7 0:0:0:0:0:ffff:4315:1007
67.21.16.8 0:0:0:0:0:ffff:4315:1008
67.21.16.9 0:0:0:0:0:ffff:4315:1009
67.21.16.10 0:0:0:0:0:ffff:4315:100a
67.21.16.11 0:0:0:0:0:ffff:4315:100b
67.21.16.12 0:0:0:0:0:ffff:4315:100c
67.21.16.13 0:0:0:0:0:ffff:4315:100d
67.21.16.14 0:0:0:0:0:ffff:4315:100e
67.21.16.15 0:0:0:0:0:ffff:4315:100f
67.21.16.16 0:0:0:0:0:ffff:4315:1010
67.21.16.17 0:0:0:0:0:ffff:4315:1011
67.21.16.18 0:0:0:0:0:ffff:4315:1012
67.21.16.19 0:0:0:0:0:ffff:4315:1013
67.21.16.20 0:0:0:0:0:ffff:4315:1014
67.21.16.21 0:0:0:0:0:ffff:4315:1015
67.21.16.22 0:0:0:0:0:ffff:4315:1016
67.21.16.23 0:0:0:0:0:ffff:4315:1017
67.21.16.24 0:0:0:0:0:ffff:4315:1018
67.21.16.25 0:0:0:0:0:ffff:4315:1019
67.21.16.26 0:0:0:0:0:ffff:4315:101a
67.21.16.27 0:0:0:0:0:ffff:4315:101b
67.21.16.28 0:0:0:0:0:ffff:4315:101c
67.21.16.29 0:0:0:0:0:ffff:4315:101d
67.21.16.30 0:0:0:0:0:ffff:4315:101e
67.21.16.31 0:0:0:0:0:ffff:4315:101f
67.21.16.32 0:0:0:0:0:ffff:4315:1020
67.21.16.33 0:0:0:0:0:ffff:4315:1021
67.21.16.34 0:0:0:0:0:ffff:4315:1022
67.21.16.35 0:0:0:0:0:ffff:4315:1023
67.21.16.36 0:0:0:0:0:ffff:4315:1024
67.21.16.37 0:0:0:0:0:ffff:4315:1025
67.21.16.38 0:0:0:0:0:ffff:4315:1026
67.21.16.39 0:0:0:0:0:ffff:4315:1027
67.21.16.40 0:0:0:0:0:ffff:4315:1028
67.21.16.41 0:0:0:0:0:ffff:4315:1029
67.21.16.42 0:0:0:0:0:ffff:4315:102a
67.21.16.43 0:0:0:0:0:ffff:4315:102b
67.21.16.44 0:0:0:0:0:ffff:4315:102c
67.21.16.45 0:0:0:0:0:ffff:4315:102d
67.21.16.46 0:0:0:0:0:ffff:4315:102e
67.21.16.47 0:0:0:0:0:ffff:4315:102f
67.21.16.48 0:0:0:0:0:ffff:4315:1030
67.21.16.49 0:0:0:0:0:ffff:4315:1031
67.21.16.50 0:0:0:0:0:ffff:4315:1032
67.21.16.51 0:0:0:0:0:ffff:4315:1033
67.21.16.52 0:0:0:0:0:ffff:4315:1034
67.21.16.53 0:0:0:0:0:ffff:4315:1035
67.21.16.54 0:0:0:0:0:ffff:4315:1036
67.21.16.55 0:0:0:0:0:ffff:4315:1037
67.21.16.56 0:0:0:0:0:ffff:4315:1038
67.21.16.57 0:0:0:0:0:ffff:4315:1039
67.21.16.58 0:0:0:0:0:ffff:4315:103a
67.21.16.59 0:0:0:0:0:ffff:4315:103b
67.21.16.60 0:0:0:0:0:ffff:4315:103c


67.21.16.61 0:0:0:0:0:ffff:4315:103d
67.21.16.62 0:0:0:0:0:ffff:4315:103e
67.21.16.63 0:0:0:0:0:ffff:4315:103f
67.21.16.64 0:0:0:0:0:ffff:4315:1040
67.21.16.65 0:0:0:0:0:ffff:4315:1041
67.21.16.66 0:0:0:0:0:ffff:4315:1042
67.21.16.67 0:0:0:0:0:ffff:4315:1043
67.21.16.68 0:0:0:0:0:ffff:4315:1044
67.21.16.69 0:0:0:0:0:ffff:4315:1045
67.21.16.70 0:0:0:0:0:ffff:4315:1046
67.21.16.71 0:0:0:0:0:ffff:4315:1047
67.21.16.72 0:0:0:0:0:ffff:4315:1048
67.21.16.73 0:0:0:0:0:ffff:4315:1049
67.21.16.74 0:0:0:0:0:ffff:4315:104a
67.21.16.75 0:0:0:0:0:ffff:4315:104b
67.21.16.76 0:0:0:0:0:ffff:4315:104c
67.21.16.77 0:0:0:0:0:ffff:4315:104d
67.21.16.78 0:0:0:0:0:ffff:4315:104e
67.21.16.79 0:0:0:0:0:ffff:4315:104f
67.21.16.80 0:0:0:0:0:ffff:4315:1050
67.21.16.81 0:0:0:0:0:ffff:4315:1051
67.21.16.82 0:0:0:0:0:ffff:4315:1052
67.21.16.83 0:0:0:0:0:ffff:4315:1053
67.21.16.84 0:0:0:0:0:ffff:4315:1054
67.21.16.85 0:0:0:0:0:ffff:4315:1055
67.21.16.86 0:0:0:0:0:ffff:4315:1056
67.21.16.87 0:0:0:0:0:ffff:4315:1057
67.21.16.88 0:0:0:0:0:ffff:4315:1058
67.21.16.89 0:0:0:0:0:ffff:4315:1059
67.21.16.90 0:0:0:0:0:ffff:4315:105a
67.21.16.91 0:0:0:0:0:ffff:4315:105b
67.21.16.92 0:0:0:0:0:ffff:4315:105c
67.21.16.93 0:0:0:0:0:ffff:4315:105d
67.21.16.94 0:0:0:0:0:ffff:4315:105e
67.21.16.95 0:0:0:0:0:ffff:4315:105f
67.21.16.96 0:0:0:0:0:ffff:4315:1060
67.21.16.97 0:0:0:0:0:ffff:4315:1061
67.21.16.98 0:0:0:0:0:ffff:4315:1062
67.21.16.99 0:0:0:0:0:ffff:4315:1063
67.21.16.100 0:0:0:0:0:ffff:4315:1064
67.21.16.101 0:0:0:0:0:ffff:4315:1065
67.21.16.102 0:0:0:0:0:ffff:4315:1066
67.21.16.103 0:0:0:0:0:ffff:4315:1067
67.21.16.104 0:0:0:0:0:ffff:4315:1068
67.21.16.105 0:0:0:0:0:ffff:4315:1069
67.21.16.106 0:0:0:0:0:ffff:4315:106a
67.21.16.107 0:0:0:0:0:ffff:4315:106b
67.21.16.108 0:0:0:0:0:ffff:4315:106c
67.21.16.109 0:0:0:0:0:ffff:4315:106d
67.21.16.110 0:0:0:0:0:ffff:4315:106e
67.21.16.111 0:0:0:0:0:ffff:4315:106f
67.21.16.112 0:0:0:0:0:ffff:4315:1070
67.21.16.113 0:0:0:0:0:ffff:4315:1071
67.21.16.114 0:0:0:0:0:ffff:4315:1072
67.21.16.115 0:0:0:0:0:ffff:4315:1073
67.21.16.116 0:0:0:0:0:ffff:4315:1074
67.21.16.117 0:0:0:0:0:ffff:4315:1075
67.21.16.118 0:0:0:0:0:ffff:4315:1076
67.21.16.119 0:0:0:0:0:ffff:4315:1077
67.21.16.120 0:0:0:0:0:ffff:4315:1078


67.21.16.121 0:0:0:0:0:ffff:4315:1079
67.21.16.122 0:0:0:0:0:ffff:4315:107a
67.21.16.123 0:0:0:0:0:ffff:4315:107b
67.21.16.124 0:0:0:0:0:ffff:4315:107c
67.21.16.125 0:0:0:0:0:ffff:4315:107d
67.21.16.126 0:0:0:0:0:ffff:4315:107e
67.21.16.127 0:0:0:0:0:ffff:4315:107f
67.21.16.128 0:0:0:0:0:ffff:4315:1080
67.21.16.129 0:0:0:0:0:ffff:4315:1081
67.21.16.130 0:0:0:0:0:ffff:4315:1082
67.21.16.131 0:0:0:0:0:ffff:4315:1083
67.21.16.132 0:0:0:0:0:ffff:4315:1084
67.21.16.133 0:0:0:0:0:ffff:4315:1085
67.21.16.134 0:0:0:0:0:ffff:4315:1086
67.21.16.135 0:0:0:0:0:ffff:4315:1087
67.21.16.136 0:0:0:0:0:ffff:4315:1088
67.21.16.137 0:0:0:0:0:ffff:4315:1089
67.21.16.138 0:0:0:0:0:ffff:4315:108a
67.21.16.139 0:0:0:0:0:ffff:4315:108b
67.21.16.140 0:0:0:0:0:ffff:4315:108c
67.21.16.141 0:0:0:0:0:ffff:4315:108d
67.21.16.142 0:0:0:0:0:ffff:4315:108e
67.21.16.143 0:0:0:0:0:ffff:4315:108f
67.21.16.144 0:0:0:0:0:ffff:4315:1090
67.21.16.145 0:0:0:0:0:ffff:4315:1091
67.21.16.146 0:0:0:0:0:ffff:4315:1092
67.21.16.147 0:0:0:0:0:ffff:4315:1093
67.21.16.148 0:0:0:0:0:ffff:4315:1094
67.21.16.149 0:0:0:0:0:ffff:4315:1095
67.21.16.150 0:0:0:0:0:ffff:4315:1096
67.21.16.151 0:0:0:0:0:ffff:4315:1097
67.21.16.152 0:0:0:0:0:ffff:4315:1098
67.21.16.153 0:0:0:0:0:ffff:4315:1099
67.21.16.154 0:0:0:0:0:ffff:4315:109a
67.21.16.155 0:0:0:0:0:ffff:4315:109b
67.21.16.156 0:0:0:0:0:ffff:4315:109c
67.21.16.157 0:0:0:0:0:ffff:4315:109d
67.21.16.158 0:0:0:0:0:ffff:4315:109e
67.21.16.159 0:0:0:0:0:ffff:4315:109f
67.21.16.160 0:0:0:0:0:ffff:4315:10a0
67.21.16.161 0:0:0:0:0:ffff:4315:10a1
67.21.16.162 0:0:0:0:0:ffff:4315:10a2
67.21.16.163 0:0:0:0:0:ffff:4315:10a3
67.21.16.164 0:0:0:0:0:ffff:4315:10a4
67.21.16.165 0:0:0:0:0:ffff:4315:10a5
67.21.16.166 0:0:0:0:0:ffff:4315:10a6
67.21.16.167 0:0:0:0:0:ffff:4315:10a7
67.21.16.168 0:0:0:0:0:ffff:4315:10a8
67.21.16.169 0:0:0:0:0:ffff:4315:10a9
67.21.16.170 0:0:0:0:0:ffff:4315:10aa
67.21.16.171 0:0:0:0:0:ffff:4315:10ab
67.21.16.172 0:0:0:0:0:ffff:4315:10ac
67.21.16.173 0:0:0:0:0:ffff:4315:10ad
67.21.16.174 0:0:0:0:0:ffff:4315:10ae
67.21.16.175 0:0:0:0:0:ffff:4315:10af
67.21.16.176 0:0:0:0:0:ffff:4315:10b0
67.21.16.177 0:0:0:0:0:ffff:4315:10b1
67.21.16.178 0:0:0:0:0:ffff:4315:10b2
67.21.16.179 0:0:0:0:0:ffff:4315:10b3
67.21.16.180 0:0:0:0:0:ffff:4315:10b4


67.21.16.181 0:0:0:0:0:ffff:4315:10b5
67.21.16.182 0:0:0:0:0:ffff:4315:10b6
67.21.16.183 0:0:0:0:0:ffff:4315:10b7
67.21.16.184 0:0:0:0:0:ffff:4315:10b8
67.21.16.185 0:0:0:0:0:ffff:4315:10b9
67.21.16.186 0:0:0:0:0:ffff:4315:10ba
67.21.16.187 0:0:0:0:0:ffff:4315:10bb
67.21.16.188 0:0:0:0:0:ffff:4315:10bc
67.21.16.189 0:0:0:0:0:ffff:4315:10bd
67.21.16.190 0:0:0:0:0:ffff:4315:10be
67.21.16.191 0:0:0:0:0:ffff:4315:10bf
67.21.16.192 0:0:0:0:0:ffff:4315:10c0
67.21.16.193 0:0:0:0:0:ffff:4315:10c1
67.21.16.194 0:0:0:0:0:ffff:4315:10c2
67.21.16.195 0:0:0:0:0:ffff:4315:10c3
67.21.16.196 0:0:0:0:0:ffff:4315:10c4
67.21.16.197 0:0:0:0:0:ffff:4315:10c5
67.21.16.198 0:0:0:0:0:ffff:4315:10c6
67.21.16.199 0:0:0:0:0:ffff:4315:10c7
67.21.16.200 0:0:0:0:0:ffff:4315:10c8
67.21.16.201 0:0:0:0:0:ffff:4315:10c9
67.21.16.202 0:0:0:0:0:ffff:4315:10ca
67.21.16.203 0:0:0:0:0:ffff:4315:10cb
67.21.16.204 0:0:0:0:0:ffff:4315:10cc
67.21.16.205 0:0:0:0:0:ffff:4315:10cd
67.21.16.206 0:0:0:0:0:ffff:4315:10ce
67.21.16.207 0:0:0:0:0:ffff:4315:10cf
67.21.16.208 0:0:0:0:0:ffff:4315:10d0
67.21.16.209 0:0:0:0:0:ffff:4315:10d1
67.21.16.210 0:0:0:0:0:ffff:4315:10d2
67.21.16.211 0:0:0:0:0:ffff:4315:10d3
67.21.16.212 0:0:0:0:0:ffff:4315:10d4
67.21.16.213 0:0:0:0:0:ffff:4315:10d5
67.21.16.214 0:0:0:0:0:ffff:4315:10d6
67.21.16.215 0:0:0:0:0:ffff:4315:10d7
67.21.16.216 0:0:0:0:0:ffff:4315:10d8
67.21.16.217 0:0:0:0:0:ffff:4315:10d9
67.21.16.218 0:0:0:0:0:ffff:4315:10da
67.21.16.219 0:0:0:0:0:ffff:4315:10db
67.21.16.220 0:0:0:0:0:ffff:4315:10dc
67.21.16.221 0:0:0:0:0:ffff:4315:10dd
67.21.16.222 0:0:0:0:0:ffff:4315:10de
67.21.16.223 0:0:0:0:0:ffff:4315:10df
67.21.16.224 0:0:0:0:0:ffff:4315:10e0
67.21.16.225 0:0:0:0:0:ffff:4315:10e1
67.21.16.226 0:0:0:0:0:ffff:4315:10e2
67.21.16.227 0:0:0:0:0:ffff:4315:10e3
67.21.16.228 0:0:0:0:0:ffff:4315:10e4
67.21.16.229 0:0:0:0:0:ffff:4315:10e5
67.21.16.230 0:0:0:0:0:ffff:4315:10e6
67.21.16.231 0:0:0:0:0:ffff:4315:10e7
67.21.16.232 0:0:0:0:0:ffff:4315:10e8
67.21.16.233 0:0:0:0:0:ffff:4315:10e9
67.21.16.234 0:0:0:0:0:ffff:4315:10ea
67.21.16.235 0:0:0:0:0:ffff:4315:10eb
67.21.16.236 0:0:0:0:0:ffff:4315:10ec
67.21.16.237 0:0:0:0:0:ffff:4315:10ed
67.21.16.238 0:0:0:0:0:ffff:4315:10ee
67.21.16.239 0:0:0:0:0:ffff:4315:10ef
67.21.16.240 0:0:0:0:0:ffff:4315:10f0
67.21.16.241 0:0:0:0:0:ffff:4315:10f1
67.21.16.242 0:0:0:0:0:ffff:4315:10f2
67.21.16.243 0:0:0:0:0:ffff:4315:10f3
67.21.16.244 0:0:0:0:0:ffff:4315:10f4
67.21.16.245 0:0:0:0:0:ffff:4315:10f5
67.21.16.246 0:0:0:0:0:ffff:4315:10f6
67.21.16.247 0:0:0:0:0:ffff:4315:10f7
67.21.16.248 0:0:0:0:0:ffff:4315:10f8
67.21.16.249 0:0:0:0:0:ffff:4315:10f9
67.21.16.250 0:0:0:0:0:ffff:4315:10fa
67.21.16.251 0:0:0:0:0:ffff:4315:10fb
67.21.16.252 0:0:0:0:0:ffff:4315:10fc
67.21.16.253 0:0:0:0:0:ffff:4315:10fd
67.21.16.254 0:0:0:0:0:ffff:4315:10fe
67.21.16.255 0:0:0:0:0:ffff:4315:10ff


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.