Recognised as IPv4 subnet
72.51.0.0/16
- IPv4
- Public
- /16
- 65,534 hosts
72.51.0.0/16 is an IPv4 subnet of 65,536 addresses, of which 65,534 are usable hosts. Its network address is 72.51.0.0, its broadcast address is 72.51.255.255, and its subnet mask is 255.255.0.0. The block is public: globally routable unicast address.
Address
01001000001100110000000000000000
Dotted decimal72.51.0.0
32-bit integer1,211,301,888
Hexadecimal0x48330000
Binary01001000.00110011.00000000.00000000
Octal0110.063.00.00
Octets1: 72 · 2: 51 · 3: 0 · 4: 0
Reverse DNS name0.0.51.72.in-addr.arpa
IPv4-mapped IPv6::ffff:72.51.0.0
IPv6 compact form::ffff:4833:0
Subnet 72.51.0.0/16
Network address72.51.0.0
Broadcast address72.51.255.255
Subnet mask255.255.0.0
Wildcard mask0.0.255.255the inverse mask, as used in ACLs
Prefix length/16
Total addresses65,536
Usable hosts65,534the network and broadcast addresses are not assignable
First usable host72.51.0.1
Last usable host72.51.255.254
Host range72.51.0.1 – 72.51.255.254
Mask in binary11111111.11111111.00000000.00000000
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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