Recognised as IPv4 subnet
72.51.209.0/25
- IPv4
- Public
- /25
- 126 hosts
72.51.209.0/25 is an IPv4 subnet of 128 addresses, of which 126 are usable hosts. Its network address is 72.51.209.0, its broadcast address is 72.51.209.127, and its subnet mask is 255.255.255.128. The block is public: globally routable unicast address.
Address
01001000001100111101000100000000
Dotted decimal72.51.209.0
32-bit integer1,211,355,392
Hexadecimal0x4833D100
Binary01001000.00110011.11010001.00000000
Octal0110.063.0321.00
Octets1: 72 · 2: 51 · 3: 209 · 4: 0
Reverse DNS name0.209.51.72.in-addr.arpa
IPv4-mapped IPv6::ffff:72.51.209.0
IPv6 compact form::ffff:4833:d100
Subnet 72.51.209.0/25
Network address72.51.209.0
Broadcast address72.51.209.127
Subnet mask255.255.255.128
Wildcard mask0.0.0.127the inverse mask, as used in ACLs
Prefix length/25
Total addresses128
Usable hosts126the network and broadcast addresses are not assignable
First usable host72.51.209.1
Last usable host72.51.209.126
Host range72.51.209.1 – 72.51.209.126
Mask in binary11111111.11111111.11111111.10000000
Contains this addressYes
Scope & registry
TypePublicglobally routable unicast address
Routable on the public internetYes
Legacy classA (/8 by the old classful scheme)classful addressing was replaced by CIDR in 1993; shown for reference only
LoopbackNo
MulticastNo
Safe to use in documentationNo
Related prefixes
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