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
191.15.25.1 0:0:0:0:0:ffff:bf0f:1901
191.15.25.2 0:0:0:0:0:ffff:bf0f:1902
191.15.25.3 0:0:0:0:0:ffff:bf0f:1903
191.15.25.4 0:0:0:0:0:ffff:bf0f:1904
191.15.25.5 0:0:0:0:0:ffff:bf0f:1905
191.15.25.6 0:0:0:0:0:ffff:bf0f:1906
191.15.25.7 0:0:0:0:0:ffff:bf0f:1907
191.15.25.8 0:0:0:0:0:ffff:bf0f:1908
191.15.25.9 0:0:0:0:0:ffff:bf0f:1909
191.15.25.10 0:0:0:0:0:ffff:bf0f:190a
191.15.25.11 0:0:0:0:0:ffff:bf0f:190b
191.15.25.12 0:0:0:0:0:ffff:bf0f:190c
191.15.25.13 0:0:0:0:0:ffff:bf0f:190d
191.15.25.14 0:0:0:0:0:ffff:bf0f:190e
191.15.25.15 0:0:0:0:0:ffff:bf0f:190f
191.15.25.16 0:0:0:0:0:ffff:bf0f:1910
191.15.25.17 0:0:0:0:0:ffff:bf0f:1911
191.15.25.18 0:0:0:0:0:ffff:bf0f:1912
191.15.25.19 0:0:0:0:0:ffff:bf0f:1913
191.15.25.20 0:0:0:0:0:ffff:bf0f:1914
191.15.25.21 0:0:0:0:0:ffff:bf0f:1915
191.15.25.22 0:0:0:0:0:ffff:bf0f:1916
191.15.25.23 0:0:0:0:0:ffff:bf0f:1917
191.15.25.24 0:0:0:0:0:ffff:bf0f:1918
191.15.25.25 0:0:0:0:0:ffff:bf0f:1919
191.15.25.26 0:0:0:0:0:ffff:bf0f:191a
191.15.25.27 0:0:0:0:0:ffff:bf0f:191b
191.15.25.28 0:0:0:0:0:ffff:bf0f:191c
191.15.25.29 0:0:0:0:0:ffff:bf0f:191d
191.15.25.30 0:0:0:0:0:ffff:bf0f:191e
191.15.25.31 0:0:0:0:0:ffff:bf0f:191f
191.15.25.32 0:0:0:0:0:ffff:bf0f:1920
191.15.25.33 0:0:0:0:0:ffff:bf0f:1921
191.15.25.34 0:0:0:0:0:ffff:bf0f:1922
191.15.25.35 0:0:0:0:0:ffff:bf0f:1923
191.15.25.36 0:0:0:0:0:ffff:bf0f:1924
191.15.25.37 0:0:0:0:0:ffff:bf0f:1925
191.15.25.38 0:0:0:0:0:ffff:bf0f:1926
191.15.25.39 0:0:0:0:0:ffff:bf0f:1927
191.15.25.40 0:0:0:0:0:ffff:bf0f:1928
191.15.25.41 0:0:0:0:0:ffff:bf0f:1929
191.15.25.42 0:0:0:0:0:ffff:bf0f:192a
191.15.25.43 0:0:0:0:0:ffff:bf0f:192b
191.15.25.44 0:0:0:0:0:ffff:bf0f:192c
191.15.25.45 0:0:0:0:0:ffff:bf0f:192d
191.15.25.46 0:0:0:0:0:ffff:bf0f:192e
191.15.25.47 0:0:0:0:0:ffff:bf0f:192f
191.15.25.48 0:0:0:0:0:ffff:bf0f:1930
191.15.25.49 0:0:0:0:0:ffff:bf0f:1931
191.15.25.50 0:0:0:0:0:ffff:bf0f:1932
191.15.25.51 0:0:0:0:0:ffff:bf0f:1933
191.15.25.52 0:0:0:0:0:ffff:bf0f:1934
191.15.25.53 0:0:0:0:0:ffff:bf0f:1935
191.15.25.54 0:0:0:0:0:ffff:bf0f:1936
191.15.25.55 0:0:0:0:0:ffff:bf0f:1937
191.15.25.56 0:0:0:0:0:ffff:bf0f:1938
191.15.25.57 0:0:0:0:0:ffff:bf0f:1939
191.15.25.58 0:0:0:0:0:ffff:bf0f:193a
191.15.25.59 0:0:0:0:0:ffff:bf0f:193b
191.15.25.60 0:0:0:0:0:ffff:bf0f:193c


191.15.25.61 0:0:0:0:0:ffff:bf0f:193d
191.15.25.62 0:0:0:0:0:ffff:bf0f:193e
191.15.25.63 0:0:0:0:0:ffff:bf0f:193f
191.15.25.64 0:0:0:0:0:ffff:bf0f:1940
191.15.25.65 0:0:0:0:0:ffff:bf0f:1941
191.15.25.66 0:0:0:0:0:ffff:bf0f:1942
191.15.25.67 0:0:0:0:0:ffff:bf0f:1943
191.15.25.68 0:0:0:0:0:ffff:bf0f:1944
191.15.25.69 0:0:0:0:0:ffff:bf0f:1945
191.15.25.70 0:0:0:0:0:ffff:bf0f:1946
191.15.25.71 0:0:0:0:0:ffff:bf0f:1947
191.15.25.72 0:0:0:0:0:ffff:bf0f:1948
191.15.25.73 0:0:0:0:0:ffff:bf0f:1949
191.15.25.74 0:0:0:0:0:ffff:bf0f:194a
191.15.25.75 0:0:0:0:0:ffff:bf0f:194b
191.15.25.76 0:0:0:0:0:ffff:bf0f:194c
191.15.25.77 0:0:0:0:0:ffff:bf0f:194d
191.15.25.78 0:0:0:0:0:ffff:bf0f:194e
191.15.25.79 0:0:0:0:0:ffff:bf0f:194f
191.15.25.80 0:0:0:0:0:ffff:bf0f:1950
191.15.25.81 0:0:0:0:0:ffff:bf0f:1951
191.15.25.82 0:0:0:0:0:ffff:bf0f:1952
191.15.25.83 0:0:0:0:0:ffff:bf0f:1953
191.15.25.84 0:0:0:0:0:ffff:bf0f:1954
191.15.25.85 0:0:0:0:0:ffff:bf0f:1955
191.15.25.86 0:0:0:0:0:ffff:bf0f:1956
191.15.25.87 0:0:0:0:0:ffff:bf0f:1957
191.15.25.88 0:0:0:0:0:ffff:bf0f:1958
191.15.25.89 0:0:0:0:0:ffff:bf0f:1959
191.15.25.90 0:0:0:0:0:ffff:bf0f:195a
191.15.25.91 0:0:0:0:0:ffff:bf0f:195b
191.15.25.92 0:0:0:0:0:ffff:bf0f:195c
191.15.25.93 0:0:0:0:0:ffff:bf0f:195d
191.15.25.94 0:0:0:0:0:ffff:bf0f:195e
191.15.25.95 0:0:0:0:0:ffff:bf0f:195f
191.15.25.96 0:0:0:0:0:ffff:bf0f:1960
191.15.25.97 0:0:0:0:0:ffff:bf0f:1961
191.15.25.98 0:0:0:0:0:ffff:bf0f:1962
191.15.25.99 0:0:0:0:0:ffff:bf0f:1963
191.15.25.100 0:0:0:0:0:ffff:bf0f:1964
191.15.25.101 0:0:0:0:0:ffff:bf0f:1965
191.15.25.102 0:0:0:0:0:ffff:bf0f:1966
191.15.25.103 0:0:0:0:0:ffff:bf0f:1967
191.15.25.104 0:0:0:0:0:ffff:bf0f:1968
191.15.25.105 0:0:0:0:0:ffff:bf0f:1969
191.15.25.106 0:0:0:0:0:ffff:bf0f:196a
191.15.25.107 0:0:0:0:0:ffff:bf0f:196b
191.15.25.108 0:0:0:0:0:ffff:bf0f:196c
191.15.25.109 0:0:0:0:0:ffff:bf0f:196d
191.15.25.110 0:0:0:0:0:ffff:bf0f:196e
191.15.25.111 0:0:0:0:0:ffff:bf0f:196f
191.15.25.112 0:0:0:0:0:ffff:bf0f:1970
191.15.25.113 0:0:0:0:0:ffff:bf0f:1971
191.15.25.114 0:0:0:0:0:ffff:bf0f:1972
191.15.25.115 0:0:0:0:0:ffff:bf0f:1973
191.15.25.116 0:0:0:0:0:ffff:bf0f:1974
191.15.25.117 0:0:0:0:0:ffff:bf0f:1975
191.15.25.118 0:0:0:0:0:ffff:bf0f:1976
191.15.25.119 0:0:0:0:0:ffff:bf0f:1977
191.15.25.120 0:0:0:0:0:ffff:bf0f:1978


191.15.25.121 0:0:0:0:0:ffff:bf0f:1979
191.15.25.122 0:0:0:0:0:ffff:bf0f:197a
191.15.25.123 0:0:0:0:0:ffff:bf0f:197b
191.15.25.124 0:0:0:0:0:ffff:bf0f:197c
191.15.25.125 0:0:0:0:0:ffff:bf0f:197d
191.15.25.126 0:0:0:0:0:ffff:bf0f:197e
191.15.25.127 0:0:0:0:0:ffff:bf0f:197f
191.15.25.128 0:0:0:0:0:ffff:bf0f:1980
191.15.25.129 0:0:0:0:0:ffff:bf0f:1981
191.15.25.130 0:0:0:0:0:ffff:bf0f:1982
191.15.25.131 0:0:0:0:0:ffff:bf0f:1983
191.15.25.132 0:0:0:0:0:ffff:bf0f:1984
191.15.25.133 0:0:0:0:0:ffff:bf0f:1985
191.15.25.134 0:0:0:0:0:ffff:bf0f:1986
191.15.25.135 0:0:0:0:0:ffff:bf0f:1987
191.15.25.136 0:0:0:0:0:ffff:bf0f:1988
191.15.25.137 0:0:0:0:0:ffff:bf0f:1989
191.15.25.138 0:0:0:0:0:ffff:bf0f:198a
191.15.25.139 0:0:0:0:0:ffff:bf0f:198b
191.15.25.140 0:0:0:0:0:ffff:bf0f:198c
191.15.25.141 0:0:0:0:0:ffff:bf0f:198d
191.15.25.142 0:0:0:0:0:ffff:bf0f:198e
191.15.25.143 0:0:0:0:0:ffff:bf0f:198f
191.15.25.144 0:0:0:0:0:ffff:bf0f:1990
191.15.25.145 0:0:0:0:0:ffff:bf0f:1991
191.15.25.146 0:0:0:0:0:ffff:bf0f:1992
191.15.25.147 0:0:0:0:0:ffff:bf0f:1993
191.15.25.148 0:0:0:0:0:ffff:bf0f:1994
191.15.25.149 0:0:0:0:0:ffff:bf0f:1995
191.15.25.150 0:0:0:0:0:ffff:bf0f:1996
191.15.25.151 0:0:0:0:0:ffff:bf0f:1997
191.15.25.152 0:0:0:0:0:ffff:bf0f:1998
191.15.25.153 0:0:0:0:0:ffff:bf0f:1999
191.15.25.154 0:0:0:0:0:ffff:bf0f:199a
191.15.25.155 0:0:0:0:0:ffff:bf0f:199b
191.15.25.156 0:0:0:0:0:ffff:bf0f:199c
191.15.25.157 0:0:0:0:0:ffff:bf0f:199d
191.15.25.158 0:0:0:0:0:ffff:bf0f:199e
191.15.25.159 0:0:0:0:0:ffff:bf0f:199f
191.15.25.160 0:0:0:0:0:ffff:bf0f:19a0
191.15.25.161 0:0:0:0:0:ffff:bf0f:19a1
191.15.25.162 0:0:0:0:0:ffff:bf0f:19a2
191.15.25.163 0:0:0:0:0:ffff:bf0f:19a3
191.15.25.164 0:0:0:0:0:ffff:bf0f:19a4
191.15.25.165 0:0:0:0:0:ffff:bf0f:19a5
191.15.25.166 0:0:0:0:0:ffff:bf0f:19a6
191.15.25.167 0:0:0:0:0:ffff:bf0f:19a7
191.15.25.168 0:0:0:0:0:ffff:bf0f:19a8
191.15.25.169 0:0:0:0:0:ffff:bf0f:19a9
191.15.25.170 0:0:0:0:0:ffff:bf0f:19aa
191.15.25.171 0:0:0:0:0:ffff:bf0f:19ab
191.15.25.172 0:0:0:0:0:ffff:bf0f:19ac
191.15.25.173 0:0:0:0:0:ffff:bf0f:19ad
191.15.25.174 0:0:0:0:0:ffff:bf0f:19ae
191.15.25.175 0:0:0:0:0:ffff:bf0f:19af
191.15.25.176 0:0:0:0:0:ffff:bf0f:19b0
191.15.25.177 0:0:0:0:0:ffff:bf0f:19b1
191.15.25.178 0:0:0:0:0:ffff:bf0f:19b2
191.15.25.179 0:0:0:0:0:ffff:bf0f:19b3
191.15.25.180 0:0:0:0:0:ffff:bf0f:19b4


191.15.25.181 0:0:0:0:0:ffff:bf0f:19b5
191.15.25.182 0:0:0:0:0:ffff:bf0f:19b6
191.15.25.183 0:0:0:0:0:ffff:bf0f:19b7
191.15.25.184 0:0:0:0:0:ffff:bf0f:19b8
191.15.25.185 0:0:0:0:0:ffff:bf0f:19b9
191.15.25.186 0:0:0:0:0:ffff:bf0f:19ba
191.15.25.187 0:0:0:0:0:ffff:bf0f:19bb
191.15.25.188 0:0:0:0:0:ffff:bf0f:19bc
191.15.25.189 0:0:0:0:0:ffff:bf0f:19bd
191.15.25.190 0:0:0:0:0:ffff:bf0f:19be
191.15.25.191 0:0:0:0:0:ffff:bf0f:19bf
191.15.25.192 0:0:0:0:0:ffff:bf0f:19c0
191.15.25.193 0:0:0:0:0:ffff:bf0f:19c1
191.15.25.194 0:0:0:0:0:ffff:bf0f:19c2
191.15.25.195 0:0:0:0:0:ffff:bf0f:19c3
191.15.25.196 0:0:0:0:0:ffff:bf0f:19c4
191.15.25.197 0:0:0:0:0:ffff:bf0f:19c5
191.15.25.198 0:0:0:0:0:ffff:bf0f:19c6
191.15.25.199 0:0:0:0:0:ffff:bf0f:19c7
191.15.25.200 0:0:0:0:0:ffff:bf0f:19c8
191.15.25.201 0:0:0:0:0:ffff:bf0f:19c9
191.15.25.202 0:0:0:0:0:ffff:bf0f:19ca
191.15.25.203 0:0:0:0:0:ffff:bf0f:19cb
191.15.25.204 0:0:0:0:0:ffff:bf0f:19cc
191.15.25.205 0:0:0:0:0:ffff:bf0f:19cd
191.15.25.206 0:0:0:0:0:ffff:bf0f:19ce
191.15.25.207 0:0:0:0:0:ffff:bf0f:19cf
191.15.25.208 0:0:0:0:0:ffff:bf0f:19d0
191.15.25.209 0:0:0:0:0:ffff:bf0f:19d1
191.15.25.210 0:0:0:0:0:ffff:bf0f:19d2
191.15.25.211 0:0:0:0:0:ffff:bf0f:19d3
191.15.25.212 0:0:0:0:0:ffff:bf0f:19d4
191.15.25.213 0:0:0:0:0:ffff:bf0f:19d5
191.15.25.214 0:0:0:0:0:ffff:bf0f:19d6
191.15.25.215 0:0:0:0:0:ffff:bf0f:19d7
191.15.25.216 0:0:0:0:0:ffff:bf0f:19d8
191.15.25.217 0:0:0:0:0:ffff:bf0f:19d9
191.15.25.218 0:0:0:0:0:ffff:bf0f:19da
191.15.25.219 0:0:0:0:0:ffff:bf0f:19db
191.15.25.220 0:0:0:0:0:ffff:bf0f:19dc
191.15.25.221 0:0:0:0:0:ffff:bf0f:19dd
191.15.25.222 0:0:0:0:0:ffff:bf0f:19de
191.15.25.223 0:0:0:0:0:ffff:bf0f:19df
191.15.25.224 0:0:0:0:0:ffff:bf0f:19e0
191.15.25.225 0:0:0:0:0:ffff:bf0f:19e1
191.15.25.226 0:0:0:0:0:ffff:bf0f:19e2
191.15.25.227 0:0:0:0:0:ffff:bf0f:19e3
191.15.25.228 0:0:0:0:0:ffff:bf0f:19e4
191.15.25.229 0:0:0:0:0:ffff:bf0f:19e5
191.15.25.230 0:0:0:0:0:ffff:bf0f:19e6
191.15.25.231 0:0:0:0:0:ffff:bf0f:19e7
191.15.25.232 0:0:0:0:0:ffff:bf0f:19e8
191.15.25.233 0:0:0:0:0:ffff:bf0f:19e9
191.15.25.234 0:0:0:0:0:ffff:bf0f:19ea
191.15.25.235 0:0:0:0:0:ffff:bf0f:19eb
191.15.25.236 0:0:0:0:0:ffff:bf0f:19ec
191.15.25.237 0:0:0:0:0:ffff:bf0f:19ed
191.15.25.238 0:0:0:0:0:ffff:bf0f:19ee
191.15.25.239 0:0:0:0:0:ffff:bf0f:19ef
191.15.25.240 0:0:0:0:0:ffff:bf0f:19f0
191.15.25.241 0:0:0:0:0:ffff:bf0f:19f1
191.15.25.242 0:0:0:0:0:ffff:bf0f:19f2
191.15.25.243 0:0:0:0:0:ffff:bf0f:19f3
191.15.25.244 0:0:0:0:0:ffff:bf0f:19f4
191.15.25.245 0:0:0:0:0:ffff:bf0f:19f5
191.15.25.246 0:0:0:0:0:ffff:bf0f:19f6
191.15.25.247 0:0:0:0:0:ffff:bf0f:19f7
191.15.25.248 0:0:0:0:0:ffff:bf0f:19f8
191.15.25.249 0:0:0:0:0:ffff:bf0f:19f9
191.15.25.250 0:0:0:0:0:ffff:bf0f:19fa
191.15.25.251 0:0:0:0:0:ffff:bf0f:19fb
191.15.25.252 0:0:0:0:0:ffff:bf0f:19fc
191.15.25.253 0:0:0:0:0:ffff:bf0f:19fd
191.15.25.254 0:0:0:0:0:ffff:bf0f:19fe
191.15.25.255 0:0:0:0:0:ffff:bf0f:19ff


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.