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
81.61.168.1 0:0:0:0:0:ffff:513d:a801
81.61.168.2 0:0:0:0:0:ffff:513d:a802
81.61.168.3 0:0:0:0:0:ffff:513d:a803
81.61.168.4 0:0:0:0:0:ffff:513d:a804
81.61.168.5 0:0:0:0:0:ffff:513d:a805
81.61.168.6 0:0:0:0:0:ffff:513d:a806
81.61.168.7 0:0:0:0:0:ffff:513d:a807
81.61.168.8 0:0:0:0:0:ffff:513d:a808
81.61.168.9 0:0:0:0:0:ffff:513d:a809
81.61.168.10 0:0:0:0:0:ffff:513d:a80a
81.61.168.11 0:0:0:0:0:ffff:513d:a80b
81.61.168.12 0:0:0:0:0:ffff:513d:a80c
81.61.168.13 0:0:0:0:0:ffff:513d:a80d
81.61.168.14 0:0:0:0:0:ffff:513d:a80e
81.61.168.15 0:0:0:0:0:ffff:513d:a80f
81.61.168.16 0:0:0:0:0:ffff:513d:a810
81.61.168.17 0:0:0:0:0:ffff:513d:a811
81.61.168.18 0:0:0:0:0:ffff:513d:a812
81.61.168.19 0:0:0:0:0:ffff:513d:a813
81.61.168.20 0:0:0:0:0:ffff:513d:a814
81.61.168.21 0:0:0:0:0:ffff:513d:a815
81.61.168.22 0:0:0:0:0:ffff:513d:a816
81.61.168.23 0:0:0:0:0:ffff:513d:a817
81.61.168.24 0:0:0:0:0:ffff:513d:a818
81.61.168.25 0:0:0:0:0:ffff:513d:a819
81.61.168.26 0:0:0:0:0:ffff:513d:a81a
81.61.168.27 0:0:0:0:0:ffff:513d:a81b
81.61.168.28 0:0:0:0:0:ffff:513d:a81c
81.61.168.29 0:0:0:0:0:ffff:513d:a81d
81.61.168.30 0:0:0:0:0:ffff:513d:a81e
81.61.168.31 0:0:0:0:0:ffff:513d:a81f
81.61.168.32 0:0:0:0:0:ffff:513d:a820
81.61.168.33 0:0:0:0:0:ffff:513d:a821
81.61.168.34 0:0:0:0:0:ffff:513d:a822
81.61.168.35 0:0:0:0:0:ffff:513d:a823
81.61.168.36 0:0:0:0:0:ffff:513d:a824
81.61.168.37 0:0:0:0:0:ffff:513d:a825
81.61.168.38 0:0:0:0:0:ffff:513d:a826
81.61.168.39 0:0:0:0:0:ffff:513d:a827
81.61.168.40 0:0:0:0:0:ffff:513d:a828
81.61.168.41 0:0:0:0:0:ffff:513d:a829
81.61.168.42 0:0:0:0:0:ffff:513d:a82a
81.61.168.43 0:0:0:0:0:ffff:513d:a82b
81.61.168.44 0:0:0:0:0:ffff:513d:a82c
81.61.168.45 0:0:0:0:0:ffff:513d:a82d
81.61.168.46 0:0:0:0:0:ffff:513d:a82e
81.61.168.47 0:0:0:0:0:ffff:513d:a82f
81.61.168.48 0:0:0:0:0:ffff:513d:a830
81.61.168.49 0:0:0:0:0:ffff:513d:a831
81.61.168.50 0:0:0:0:0:ffff:513d:a832
81.61.168.51 0:0:0:0:0:ffff:513d:a833
81.61.168.52 0:0:0:0:0:ffff:513d:a834
81.61.168.53 0:0:0:0:0:ffff:513d:a835
81.61.168.54 0:0:0:0:0:ffff:513d:a836
81.61.168.55 0:0:0:0:0:ffff:513d:a837
81.61.168.56 0:0:0:0:0:ffff:513d:a838
81.61.168.57 0:0:0:0:0:ffff:513d:a839
81.61.168.58 0:0:0:0:0:ffff:513d:a83a
81.61.168.59 0:0:0:0:0:ffff:513d:a83b
81.61.168.60 0:0:0:0:0:ffff:513d:a83c


81.61.168.61 0:0:0:0:0:ffff:513d:a83d
81.61.168.62 0:0:0:0:0:ffff:513d:a83e
81.61.168.63 0:0:0:0:0:ffff:513d:a83f
81.61.168.64 0:0:0:0:0:ffff:513d:a840
81.61.168.65 0:0:0:0:0:ffff:513d:a841
81.61.168.66 0:0:0:0:0:ffff:513d:a842
81.61.168.67 0:0:0:0:0:ffff:513d:a843
81.61.168.68 0:0:0:0:0:ffff:513d:a844
81.61.168.69 0:0:0:0:0:ffff:513d:a845
81.61.168.70 0:0:0:0:0:ffff:513d:a846
81.61.168.71 0:0:0:0:0:ffff:513d:a847
81.61.168.72 0:0:0:0:0:ffff:513d:a848
81.61.168.73 0:0:0:0:0:ffff:513d:a849
81.61.168.74 0:0:0:0:0:ffff:513d:a84a
81.61.168.75 0:0:0:0:0:ffff:513d:a84b
81.61.168.76 0:0:0:0:0:ffff:513d:a84c
81.61.168.77 0:0:0:0:0:ffff:513d:a84d
81.61.168.78 0:0:0:0:0:ffff:513d:a84e
81.61.168.79 0:0:0:0:0:ffff:513d:a84f
81.61.168.80 0:0:0:0:0:ffff:513d:a850
81.61.168.81 0:0:0:0:0:ffff:513d:a851
81.61.168.82 0:0:0:0:0:ffff:513d:a852
81.61.168.83 0:0:0:0:0:ffff:513d:a853
81.61.168.84 0:0:0:0:0:ffff:513d:a854
81.61.168.85 0:0:0:0:0:ffff:513d:a855
81.61.168.86 0:0:0:0:0:ffff:513d:a856
81.61.168.87 0:0:0:0:0:ffff:513d:a857
81.61.168.88 0:0:0:0:0:ffff:513d:a858
81.61.168.89 0:0:0:0:0:ffff:513d:a859
81.61.168.90 0:0:0:0:0:ffff:513d:a85a
81.61.168.91 0:0:0:0:0:ffff:513d:a85b
81.61.168.92 0:0:0:0:0:ffff:513d:a85c
81.61.168.93 0:0:0:0:0:ffff:513d:a85d
81.61.168.94 0:0:0:0:0:ffff:513d:a85e
81.61.168.95 0:0:0:0:0:ffff:513d:a85f
81.61.168.96 0:0:0:0:0:ffff:513d:a860
81.61.168.97 0:0:0:0:0:ffff:513d:a861
81.61.168.98 0:0:0:0:0:ffff:513d:a862
81.61.168.99 0:0:0:0:0:ffff:513d:a863
81.61.168.100 0:0:0:0:0:ffff:513d:a864
81.61.168.101 0:0:0:0:0:ffff:513d:a865
81.61.168.102 0:0:0:0:0:ffff:513d:a866
81.61.168.103 0:0:0:0:0:ffff:513d:a867
81.61.168.104 0:0:0:0:0:ffff:513d:a868
81.61.168.105 0:0:0:0:0:ffff:513d:a869
81.61.168.106 0:0:0:0:0:ffff:513d:a86a
81.61.168.107 0:0:0:0:0:ffff:513d:a86b
81.61.168.108 0:0:0:0:0:ffff:513d:a86c
81.61.168.109 0:0:0:0:0:ffff:513d:a86d
81.61.168.110 0:0:0:0:0:ffff:513d:a86e
81.61.168.111 0:0:0:0:0:ffff:513d:a86f
81.61.168.112 0:0:0:0:0:ffff:513d:a870
81.61.168.113 0:0:0:0:0:ffff:513d:a871
81.61.168.114 0:0:0:0:0:ffff:513d:a872
81.61.168.115 0:0:0:0:0:ffff:513d:a873
81.61.168.116 0:0:0:0:0:ffff:513d:a874
81.61.168.117 0:0:0:0:0:ffff:513d:a875
81.61.168.118 0:0:0:0:0:ffff:513d:a876
81.61.168.119 0:0:0:0:0:ffff:513d:a877
81.61.168.120 0:0:0:0:0:ffff:513d:a878


81.61.168.121 0:0:0:0:0:ffff:513d:a879
81.61.168.122 0:0:0:0:0:ffff:513d:a87a
81.61.168.123 0:0:0:0:0:ffff:513d:a87b
81.61.168.124 0:0:0:0:0:ffff:513d:a87c
81.61.168.125 0:0:0:0:0:ffff:513d:a87d
81.61.168.126 0:0:0:0:0:ffff:513d:a87e
81.61.168.127 0:0:0:0:0:ffff:513d:a87f
81.61.168.128 0:0:0:0:0:ffff:513d:a880
81.61.168.129 0:0:0:0:0:ffff:513d:a881
81.61.168.130 0:0:0:0:0:ffff:513d:a882
81.61.168.131 0:0:0:0:0:ffff:513d:a883
81.61.168.132 0:0:0:0:0:ffff:513d:a884
81.61.168.133 0:0:0:0:0:ffff:513d:a885
81.61.168.134 0:0:0:0:0:ffff:513d:a886
81.61.168.135 0:0:0:0:0:ffff:513d:a887
81.61.168.136 0:0:0:0:0:ffff:513d:a888
81.61.168.137 0:0:0:0:0:ffff:513d:a889
81.61.168.138 0:0:0:0:0:ffff:513d:a88a
81.61.168.139 0:0:0:0:0:ffff:513d:a88b
81.61.168.140 0:0:0:0:0:ffff:513d:a88c
81.61.168.141 0:0:0:0:0:ffff:513d:a88d
81.61.168.142 0:0:0:0:0:ffff:513d:a88e
81.61.168.143 0:0:0:0:0:ffff:513d:a88f
81.61.168.144 0:0:0:0:0:ffff:513d:a890
81.61.168.145 0:0:0:0:0:ffff:513d:a891
81.61.168.146 0:0:0:0:0:ffff:513d:a892
81.61.168.147 0:0:0:0:0:ffff:513d:a893
81.61.168.148 0:0:0:0:0:ffff:513d:a894
81.61.168.149 0:0:0:0:0:ffff:513d:a895
81.61.168.150 0:0:0:0:0:ffff:513d:a896
81.61.168.151 0:0:0:0:0:ffff:513d:a897
81.61.168.152 0:0:0:0:0:ffff:513d:a898
81.61.168.153 0:0:0:0:0:ffff:513d:a899
81.61.168.154 0:0:0:0:0:ffff:513d:a89a
81.61.168.155 0:0:0:0:0:ffff:513d:a89b
81.61.168.156 0:0:0:0:0:ffff:513d:a89c
81.61.168.157 0:0:0:0:0:ffff:513d:a89d
81.61.168.158 0:0:0:0:0:ffff:513d:a89e
81.61.168.159 0:0:0:0:0:ffff:513d:a89f
81.61.168.160 0:0:0:0:0:ffff:513d:a8a0
81.61.168.161 0:0:0:0:0:ffff:513d:a8a1
81.61.168.162 0:0:0:0:0:ffff:513d:a8a2
81.61.168.163 0:0:0:0:0:ffff:513d:a8a3
81.61.168.164 0:0:0:0:0:ffff:513d:a8a4
81.61.168.165 0:0:0:0:0:ffff:513d:a8a5
81.61.168.166 0:0:0:0:0:ffff:513d:a8a6
81.61.168.167 0:0:0:0:0:ffff:513d:a8a7
81.61.168.168 0:0:0:0:0:ffff:513d:a8a8
81.61.168.169 0:0:0:0:0:ffff:513d:a8a9
81.61.168.170 0:0:0:0:0:ffff:513d:a8aa
81.61.168.171 0:0:0:0:0:ffff:513d:a8ab
81.61.168.172 0:0:0:0:0:ffff:513d:a8ac
81.61.168.173 0:0:0:0:0:ffff:513d:a8ad
81.61.168.174 0:0:0:0:0:ffff:513d:a8ae
81.61.168.175 0:0:0:0:0:ffff:513d:a8af
81.61.168.176 0:0:0:0:0:ffff:513d:a8b0
81.61.168.177 0:0:0:0:0:ffff:513d:a8b1
81.61.168.178 0:0:0:0:0:ffff:513d:a8b2
81.61.168.179 0:0:0:0:0:ffff:513d:a8b3
81.61.168.180 0:0:0:0:0:ffff:513d:a8b4


81.61.168.181 0:0:0:0:0:ffff:513d:a8b5
81.61.168.182 0:0:0:0:0:ffff:513d:a8b6
81.61.168.183 0:0:0:0:0:ffff:513d:a8b7
81.61.168.184 0:0:0:0:0:ffff:513d:a8b8
81.61.168.185 0:0:0:0:0:ffff:513d:a8b9
81.61.168.186 0:0:0:0:0:ffff:513d:a8ba
81.61.168.187 0:0:0:0:0:ffff:513d:a8bb
81.61.168.188 0:0:0:0:0:ffff:513d:a8bc
81.61.168.189 0:0:0:0:0:ffff:513d:a8bd
81.61.168.190 0:0:0:0:0:ffff:513d:a8be
81.61.168.191 0:0:0:0:0:ffff:513d:a8bf
81.61.168.192 0:0:0:0:0:ffff:513d:a8c0
81.61.168.193 0:0:0:0:0:ffff:513d:a8c1
81.61.168.194 0:0:0:0:0:ffff:513d:a8c2
81.61.168.195 0:0:0:0:0:ffff:513d:a8c3
81.61.168.196 0:0:0:0:0:ffff:513d:a8c4
81.61.168.197 0:0:0:0:0:ffff:513d:a8c5
81.61.168.198 0:0:0:0:0:ffff:513d:a8c6
81.61.168.199 0:0:0:0:0:ffff:513d:a8c7
81.61.168.200 0:0:0:0:0:ffff:513d:a8c8
81.61.168.201 0:0:0:0:0:ffff:513d:a8c9
81.61.168.202 0:0:0:0:0:ffff:513d:a8ca
81.61.168.203 0:0:0:0:0:ffff:513d:a8cb
81.61.168.204 0:0:0:0:0:ffff:513d:a8cc
81.61.168.205 0:0:0:0:0:ffff:513d:a8cd
81.61.168.206 0:0:0:0:0:ffff:513d:a8ce
81.61.168.207 0:0:0:0:0:ffff:513d:a8cf
81.61.168.208 0:0:0:0:0:ffff:513d:a8d0
81.61.168.209 0:0:0:0:0:ffff:513d:a8d1
81.61.168.210 0:0:0:0:0:ffff:513d:a8d2
81.61.168.211 0:0:0:0:0:ffff:513d:a8d3
81.61.168.212 0:0:0:0:0:ffff:513d:a8d4
81.61.168.213 0:0:0:0:0:ffff:513d:a8d5
81.61.168.214 0:0:0:0:0:ffff:513d:a8d6
81.61.168.215 0:0:0:0:0:ffff:513d:a8d7
81.61.168.216 0:0:0:0:0:ffff:513d:a8d8
81.61.168.217 0:0:0:0:0:ffff:513d:a8d9
81.61.168.218 0:0:0:0:0:ffff:513d:a8da
81.61.168.219 0:0:0:0:0:ffff:513d:a8db
81.61.168.220 0:0:0:0:0:ffff:513d:a8dc
81.61.168.221 0:0:0:0:0:ffff:513d:a8dd
81.61.168.222 0:0:0:0:0:ffff:513d:a8de
81.61.168.223 0:0:0:0:0:ffff:513d:a8df
81.61.168.224 0:0:0:0:0:ffff:513d:a8e0
81.61.168.225 0:0:0:0:0:ffff:513d:a8e1
81.61.168.226 0:0:0:0:0:ffff:513d:a8e2
81.61.168.227 0:0:0:0:0:ffff:513d:a8e3
81.61.168.228 0:0:0:0:0:ffff:513d:a8e4
81.61.168.229 0:0:0:0:0:ffff:513d:a8e5
81.61.168.230 0:0:0:0:0:ffff:513d:a8e6
81.61.168.231 0:0:0:0:0:ffff:513d:a8e7
81.61.168.232 0:0:0:0:0:ffff:513d:a8e8
81.61.168.233 0:0:0:0:0:ffff:513d:a8e9
81.61.168.234 0:0:0:0:0:ffff:513d:a8ea
81.61.168.235 0:0:0:0:0:ffff:513d:a8eb
81.61.168.236 0:0:0:0:0:ffff:513d:a8ec
81.61.168.237 0:0:0:0:0:ffff:513d:a8ed
81.61.168.238 0:0:0:0:0:ffff:513d:a8ee
81.61.168.239 0:0:0:0:0:ffff:513d:a8ef
81.61.168.240 0:0:0:0:0:ffff:513d:a8f0
81.61.168.241 0:0:0:0:0:ffff:513d:a8f1
81.61.168.242 0:0:0:0:0:ffff:513d:a8f2
81.61.168.243 0:0:0:0:0:ffff:513d:a8f3
81.61.168.244 0:0:0:0:0:ffff:513d:a8f4
81.61.168.245 0:0:0:0:0:ffff:513d:a8f5
81.61.168.246 0:0:0:0:0:ffff:513d:a8f6
81.61.168.247 0:0:0:0:0:ffff:513d:a8f7
81.61.168.248 0:0:0:0:0:ffff:513d:a8f8
81.61.168.249 0:0:0:0:0:ffff:513d:a8f9
81.61.168.250 0:0:0:0:0:ffff:513d:a8fa
81.61.168.251 0:0:0:0:0:ffff:513d:a8fb
81.61.168.252 0:0:0:0:0:ffff:513d:a8fc
81.61.168.253 0:0:0:0:0:ffff:513d:a8fd
81.61.168.254 0:0:0:0:0:ffff:513d:a8fe
81.61.168.255 0:0:0:0:0:ffff:513d:a8ff


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.