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
155.38.21.1 0:0:0:0:0:ffff:9b26:1501
155.38.21.2 0:0:0:0:0:ffff:9b26:1502
155.38.21.3 0:0:0:0:0:ffff:9b26:1503
155.38.21.4 0:0:0:0:0:ffff:9b26:1504
155.38.21.5 0:0:0:0:0:ffff:9b26:1505
155.38.21.6 0:0:0:0:0:ffff:9b26:1506
155.38.21.7 0:0:0:0:0:ffff:9b26:1507
155.38.21.8 0:0:0:0:0:ffff:9b26:1508
155.38.21.9 0:0:0:0:0:ffff:9b26:1509
155.38.21.10 0:0:0:0:0:ffff:9b26:150a
155.38.21.11 0:0:0:0:0:ffff:9b26:150b
155.38.21.12 0:0:0:0:0:ffff:9b26:150c
155.38.21.13 0:0:0:0:0:ffff:9b26:150d
155.38.21.14 0:0:0:0:0:ffff:9b26:150e
155.38.21.15 0:0:0:0:0:ffff:9b26:150f
155.38.21.16 0:0:0:0:0:ffff:9b26:1510
155.38.21.17 0:0:0:0:0:ffff:9b26:1511
155.38.21.18 0:0:0:0:0:ffff:9b26:1512
155.38.21.19 0:0:0:0:0:ffff:9b26:1513
155.38.21.20 0:0:0:0:0:ffff:9b26:1514
155.38.21.21 0:0:0:0:0:ffff:9b26:1515
155.38.21.22 0:0:0:0:0:ffff:9b26:1516
155.38.21.23 0:0:0:0:0:ffff:9b26:1517
155.38.21.24 0:0:0:0:0:ffff:9b26:1518
155.38.21.25 0:0:0:0:0:ffff:9b26:1519
155.38.21.26 0:0:0:0:0:ffff:9b26:151a
155.38.21.27 0:0:0:0:0:ffff:9b26:151b
155.38.21.28 0:0:0:0:0:ffff:9b26:151c
155.38.21.29 0:0:0:0:0:ffff:9b26:151d
155.38.21.30 0:0:0:0:0:ffff:9b26:151e
155.38.21.31 0:0:0:0:0:ffff:9b26:151f
155.38.21.32 0:0:0:0:0:ffff:9b26:1520
155.38.21.33 0:0:0:0:0:ffff:9b26:1521
155.38.21.34 0:0:0:0:0:ffff:9b26:1522
155.38.21.35 0:0:0:0:0:ffff:9b26:1523
155.38.21.36 0:0:0:0:0:ffff:9b26:1524
155.38.21.37 0:0:0:0:0:ffff:9b26:1525
155.38.21.38 0:0:0:0:0:ffff:9b26:1526
155.38.21.39 0:0:0:0:0:ffff:9b26:1527
155.38.21.40 0:0:0:0:0:ffff:9b26:1528
155.38.21.41 0:0:0:0:0:ffff:9b26:1529
155.38.21.42 0:0:0:0:0:ffff:9b26:152a
155.38.21.43 0:0:0:0:0:ffff:9b26:152b
155.38.21.44 0:0:0:0:0:ffff:9b26:152c
155.38.21.45 0:0:0:0:0:ffff:9b26:152d
155.38.21.46 0:0:0:0:0:ffff:9b26:152e
155.38.21.47 0:0:0:0:0:ffff:9b26:152f
155.38.21.48 0:0:0:0:0:ffff:9b26:1530
155.38.21.49 0:0:0:0:0:ffff:9b26:1531
155.38.21.50 0:0:0:0:0:ffff:9b26:1532
155.38.21.51 0:0:0:0:0:ffff:9b26:1533
155.38.21.52 0:0:0:0:0:ffff:9b26:1534
155.38.21.53 0:0:0:0:0:ffff:9b26:1535
155.38.21.54 0:0:0:0:0:ffff:9b26:1536
155.38.21.55 0:0:0:0:0:ffff:9b26:1537
155.38.21.56 0:0:0:0:0:ffff:9b26:1538
155.38.21.57 0:0:0:0:0:ffff:9b26:1539
155.38.21.58 0:0:0:0:0:ffff:9b26:153a
155.38.21.59 0:0:0:0:0:ffff:9b26:153b
155.38.21.60 0:0:0:0:0:ffff:9b26:153c


155.38.21.61 0:0:0:0:0:ffff:9b26:153d
155.38.21.62 0:0:0:0:0:ffff:9b26:153e
155.38.21.63 0:0:0:0:0:ffff:9b26:153f
155.38.21.64 0:0:0:0:0:ffff:9b26:1540
155.38.21.65 0:0:0:0:0:ffff:9b26:1541
155.38.21.66 0:0:0:0:0:ffff:9b26:1542
155.38.21.67 0:0:0:0:0:ffff:9b26:1543
155.38.21.68 0:0:0:0:0:ffff:9b26:1544
155.38.21.69 0:0:0:0:0:ffff:9b26:1545
155.38.21.70 0:0:0:0:0:ffff:9b26:1546
155.38.21.71 0:0:0:0:0:ffff:9b26:1547
155.38.21.72 0:0:0:0:0:ffff:9b26:1548
155.38.21.73 0:0:0:0:0:ffff:9b26:1549
155.38.21.74 0:0:0:0:0:ffff:9b26:154a
155.38.21.75 0:0:0:0:0:ffff:9b26:154b
155.38.21.76 0:0:0:0:0:ffff:9b26:154c
155.38.21.77 0:0:0:0:0:ffff:9b26:154d
155.38.21.78 0:0:0:0:0:ffff:9b26:154e
155.38.21.79 0:0:0:0:0:ffff:9b26:154f
155.38.21.80 0:0:0:0:0:ffff:9b26:1550
155.38.21.81 0:0:0:0:0:ffff:9b26:1551
155.38.21.82 0:0:0:0:0:ffff:9b26:1552
155.38.21.83 0:0:0:0:0:ffff:9b26:1553
155.38.21.84 0:0:0:0:0:ffff:9b26:1554
155.38.21.85 0:0:0:0:0:ffff:9b26:1555
155.38.21.86 0:0:0:0:0:ffff:9b26:1556
155.38.21.87 0:0:0:0:0:ffff:9b26:1557
155.38.21.88 0:0:0:0:0:ffff:9b26:1558
155.38.21.89 0:0:0:0:0:ffff:9b26:1559
155.38.21.90 0:0:0:0:0:ffff:9b26:155a
155.38.21.91 0:0:0:0:0:ffff:9b26:155b
155.38.21.92 0:0:0:0:0:ffff:9b26:155c
155.38.21.93 0:0:0:0:0:ffff:9b26:155d
155.38.21.94 0:0:0:0:0:ffff:9b26:155e
155.38.21.95 0:0:0:0:0:ffff:9b26:155f
155.38.21.96 0:0:0:0:0:ffff:9b26:1560
155.38.21.97 0:0:0:0:0:ffff:9b26:1561
155.38.21.98 0:0:0:0:0:ffff:9b26:1562
155.38.21.99 0:0:0:0:0:ffff:9b26:1563
155.38.21.100 0:0:0:0:0:ffff:9b26:1564
155.38.21.101 0:0:0:0:0:ffff:9b26:1565
155.38.21.102 0:0:0:0:0:ffff:9b26:1566
155.38.21.103 0:0:0:0:0:ffff:9b26:1567
155.38.21.104 0:0:0:0:0:ffff:9b26:1568
155.38.21.105 0:0:0:0:0:ffff:9b26:1569
155.38.21.106 0:0:0:0:0:ffff:9b26:156a
155.38.21.107 0:0:0:0:0:ffff:9b26:156b
155.38.21.108 0:0:0:0:0:ffff:9b26:156c
155.38.21.109 0:0:0:0:0:ffff:9b26:156d
155.38.21.110 0:0:0:0:0:ffff:9b26:156e
155.38.21.111 0:0:0:0:0:ffff:9b26:156f
155.38.21.112 0:0:0:0:0:ffff:9b26:1570
155.38.21.113 0:0:0:0:0:ffff:9b26:1571
155.38.21.114 0:0:0:0:0:ffff:9b26:1572
155.38.21.115 0:0:0:0:0:ffff:9b26:1573
155.38.21.116 0:0:0:0:0:ffff:9b26:1574
155.38.21.117 0:0:0:0:0:ffff:9b26:1575
155.38.21.118 0:0:0:0:0:ffff:9b26:1576
155.38.21.119 0:0:0:0:0:ffff:9b26:1577
155.38.21.120 0:0:0:0:0:ffff:9b26:1578


155.38.21.121 0:0:0:0:0:ffff:9b26:1579
155.38.21.122 0:0:0:0:0:ffff:9b26:157a
155.38.21.123 0:0:0:0:0:ffff:9b26:157b
155.38.21.124 0:0:0:0:0:ffff:9b26:157c
155.38.21.125 0:0:0:0:0:ffff:9b26:157d
155.38.21.126 0:0:0:0:0:ffff:9b26:157e
155.38.21.127 0:0:0:0:0:ffff:9b26:157f
155.38.21.128 0:0:0:0:0:ffff:9b26:1580
155.38.21.129 0:0:0:0:0:ffff:9b26:1581
155.38.21.130 0:0:0:0:0:ffff:9b26:1582
155.38.21.131 0:0:0:0:0:ffff:9b26:1583
155.38.21.132 0:0:0:0:0:ffff:9b26:1584
155.38.21.133 0:0:0:0:0:ffff:9b26:1585
155.38.21.134 0:0:0:0:0:ffff:9b26:1586
155.38.21.135 0:0:0:0:0:ffff:9b26:1587
155.38.21.136 0:0:0:0:0:ffff:9b26:1588
155.38.21.137 0:0:0:0:0:ffff:9b26:1589
155.38.21.138 0:0:0:0:0:ffff:9b26:158a
155.38.21.139 0:0:0:0:0:ffff:9b26:158b
155.38.21.140 0:0:0:0:0:ffff:9b26:158c
155.38.21.141 0:0:0:0:0:ffff:9b26:158d
155.38.21.142 0:0:0:0:0:ffff:9b26:158e
155.38.21.143 0:0:0:0:0:ffff:9b26:158f
155.38.21.144 0:0:0:0:0:ffff:9b26:1590
155.38.21.145 0:0:0:0:0:ffff:9b26:1591
155.38.21.146 0:0:0:0:0:ffff:9b26:1592
155.38.21.147 0:0:0:0:0:ffff:9b26:1593
155.38.21.148 0:0:0:0:0:ffff:9b26:1594
155.38.21.149 0:0:0:0:0:ffff:9b26:1595
155.38.21.150 0:0:0:0:0:ffff:9b26:1596
155.38.21.151 0:0:0:0:0:ffff:9b26:1597
155.38.21.152 0:0:0:0:0:ffff:9b26:1598
155.38.21.153 0:0:0:0:0:ffff:9b26:1599
155.38.21.154 0:0:0:0:0:ffff:9b26:159a
155.38.21.155 0:0:0:0:0:ffff:9b26:159b
155.38.21.156 0:0:0:0:0:ffff:9b26:159c
155.38.21.157 0:0:0:0:0:ffff:9b26:159d
155.38.21.158 0:0:0:0:0:ffff:9b26:159e
155.38.21.159 0:0:0:0:0:ffff:9b26:159f
155.38.21.160 0:0:0:0:0:ffff:9b26:15a0
155.38.21.161 0:0:0:0:0:ffff:9b26:15a1
155.38.21.162 0:0:0:0:0:ffff:9b26:15a2
155.38.21.163 0:0:0:0:0:ffff:9b26:15a3
155.38.21.164 0:0:0:0:0:ffff:9b26:15a4
155.38.21.165 0:0:0:0:0:ffff:9b26:15a5
155.38.21.166 0:0:0:0:0:ffff:9b26:15a6
155.38.21.167 0:0:0:0:0:ffff:9b26:15a7
155.38.21.168 0:0:0:0:0:ffff:9b26:15a8
155.38.21.169 0:0:0:0:0:ffff:9b26:15a9
155.38.21.170 0:0:0:0:0:ffff:9b26:15aa
155.38.21.171 0:0:0:0:0:ffff:9b26:15ab
155.38.21.172 0:0:0:0:0:ffff:9b26:15ac
155.38.21.173 0:0:0:0:0:ffff:9b26:15ad
155.38.21.174 0:0:0:0:0:ffff:9b26:15ae
155.38.21.175 0:0:0:0:0:ffff:9b26:15af
155.38.21.176 0:0:0:0:0:ffff:9b26:15b0
155.38.21.177 0:0:0:0:0:ffff:9b26:15b1
155.38.21.178 0:0:0:0:0:ffff:9b26:15b2
155.38.21.179 0:0:0:0:0:ffff:9b26:15b3
155.38.21.180 0:0:0:0:0:ffff:9b26:15b4


155.38.21.181 0:0:0:0:0:ffff:9b26:15b5
155.38.21.182 0:0:0:0:0:ffff:9b26:15b6
155.38.21.183 0:0:0:0:0:ffff:9b26:15b7
155.38.21.184 0:0:0:0:0:ffff:9b26:15b8
155.38.21.185 0:0:0:0:0:ffff:9b26:15b9
155.38.21.186 0:0:0:0:0:ffff:9b26:15ba
155.38.21.187 0:0:0:0:0:ffff:9b26:15bb
155.38.21.188 0:0:0:0:0:ffff:9b26:15bc
155.38.21.189 0:0:0:0:0:ffff:9b26:15bd
155.38.21.190 0:0:0:0:0:ffff:9b26:15be
155.38.21.191 0:0:0:0:0:ffff:9b26:15bf
155.38.21.192 0:0:0:0:0:ffff:9b26:15c0
155.38.21.193 0:0:0:0:0:ffff:9b26:15c1
155.38.21.194 0:0:0:0:0:ffff:9b26:15c2
155.38.21.195 0:0:0:0:0:ffff:9b26:15c3
155.38.21.196 0:0:0:0:0:ffff:9b26:15c4
155.38.21.197 0:0:0:0:0:ffff:9b26:15c5
155.38.21.198 0:0:0:0:0:ffff:9b26:15c6
155.38.21.199 0:0:0:0:0:ffff:9b26:15c7
155.38.21.200 0:0:0:0:0:ffff:9b26:15c8
155.38.21.201 0:0:0:0:0:ffff:9b26:15c9
155.38.21.202 0:0:0:0:0:ffff:9b26:15ca
155.38.21.203 0:0:0:0:0:ffff:9b26:15cb
155.38.21.204 0:0:0:0:0:ffff:9b26:15cc
155.38.21.205 0:0:0:0:0:ffff:9b26:15cd
155.38.21.206 0:0:0:0:0:ffff:9b26:15ce
155.38.21.207 0:0:0:0:0:ffff:9b26:15cf
155.38.21.208 0:0:0:0:0:ffff:9b26:15d0
155.38.21.209 0:0:0:0:0:ffff:9b26:15d1
155.38.21.210 0:0:0:0:0:ffff:9b26:15d2
155.38.21.211 0:0:0:0:0:ffff:9b26:15d3
155.38.21.212 0:0:0:0:0:ffff:9b26:15d4
155.38.21.213 0:0:0:0:0:ffff:9b26:15d5
155.38.21.214 0:0:0:0:0:ffff:9b26:15d6
155.38.21.215 0:0:0:0:0:ffff:9b26:15d7
155.38.21.216 0:0:0:0:0:ffff:9b26:15d8
155.38.21.217 0:0:0:0:0:ffff:9b26:15d9
155.38.21.218 0:0:0:0:0:ffff:9b26:15da
155.38.21.219 0:0:0:0:0:ffff:9b26:15db
155.38.21.220 0:0:0:0:0:ffff:9b26:15dc
155.38.21.221 0:0:0:0:0:ffff:9b26:15dd
155.38.21.222 0:0:0:0:0:ffff:9b26:15de
155.38.21.223 0:0:0:0:0:ffff:9b26:15df
155.38.21.224 0:0:0:0:0:ffff:9b26:15e0
155.38.21.225 0:0:0:0:0:ffff:9b26:15e1
155.38.21.226 0:0:0:0:0:ffff:9b26:15e2
155.38.21.227 0:0:0:0:0:ffff:9b26:15e3
155.38.21.228 0:0:0:0:0:ffff:9b26:15e4
155.38.21.229 0:0:0:0:0:ffff:9b26:15e5
155.38.21.230 0:0:0:0:0:ffff:9b26:15e6
155.38.21.231 0:0:0:0:0:ffff:9b26:15e7
155.38.21.232 0:0:0:0:0:ffff:9b26:15e8
155.38.21.233 0:0:0:0:0:ffff:9b26:15e9
155.38.21.234 0:0:0:0:0:ffff:9b26:15ea
155.38.21.235 0:0:0:0:0:ffff:9b26:15eb
155.38.21.236 0:0:0:0:0:ffff:9b26:15ec
155.38.21.237 0:0:0:0:0:ffff:9b26:15ed
155.38.21.238 0:0:0:0:0:ffff:9b26:15ee
155.38.21.239 0:0:0:0:0:ffff:9b26:15ef
155.38.21.240 0:0:0:0:0:ffff:9b26:15f0
155.38.21.241 0:0:0:0:0:ffff:9b26:15f1
155.38.21.242 0:0:0:0:0:ffff:9b26:15f2
155.38.21.243 0:0:0:0:0:ffff:9b26:15f3
155.38.21.244 0:0:0:0:0:ffff:9b26:15f4
155.38.21.245 0:0:0:0:0:ffff:9b26:15f5
155.38.21.246 0:0:0:0:0:ffff:9b26:15f6
155.38.21.247 0:0:0:0:0:ffff:9b26:15f7
155.38.21.248 0:0:0:0:0:ffff:9b26:15f8
155.38.21.249 0:0:0:0:0:ffff:9b26:15f9
155.38.21.250 0:0:0:0:0:ffff:9b26:15fa
155.38.21.251 0:0:0:0:0:ffff:9b26:15fb
155.38.21.252 0:0:0:0:0:ffff:9b26:15fc
155.38.21.253 0:0:0:0:0:ffff:9b26:15fd
155.38.21.254 0:0:0:0:0:ffff:9b26:15fe
155.38.21.255 0:0:0:0:0:ffff:9b26:15ff


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.