Online IP Address Class Finder (Detector)

Detect (Find) Class of IP Address

Use this tool to find class of IP Address that belongs to (Classes are: A, B, C, D, and E).

Class A From 0.0.0.0 to 127.255.255.255

Reserved IP address Range Table (Private Addresses and Special Addresses that can't be used as Public Address)

IP/CDIR	Subnet mask	Range	Scope	Description
0.0.0.0/8	255.0.0.0	0.0.0.0 - 0.255.255.255	private network	"This" Network (RFC 1122, Section 3.2.1.3)
10.0.0.0/8	255.0.0.0	10.0.0.0 - 10.255.255.255	private network	Private-Use Networks (RFC 1918)
100.64.0.0/10	255.192.0.0	100.64.0.0 - 100.127.255.255	private network	Private network (RFC 6598)
127.0.0.0/8	255.0.0.0	127.0.0.0 - 127.255.255.255	host	Loopback (RFC 1122, Section 3.2.1.3)
169.254.0.0/16	255.255.0.0	169.254.0.0 - 169.254.255.255	subnet	Link Local (RFC 3927)
172.16.0.0/12	255.240.0.0	172.16.0.0 - 172.31.255.255	private network	Private-Use Networks (RFC 1918)
192.0.0.0/24	255.255.255.0	192.0.0.0 - 192.0.0.255	private network	IETF Protocol Assignments (RFC 5736)
192.0.2.0/24	255.255.255.0	192.0.2.0 - 192.0.2.255	documentation	TEST-NET-1 (RFC 5737)
192.88.99.0/24	255.255.255.0	192.88.99.0 - 192.88.99.255	Internet	6to4 Relay Anycast (RFC 3068)
192.168.0.0/16	255.255.0.0	192.168.0.0 - 192.168.255.255	private network	Private-Use Networks (RFC 1918)
198.18.0.0/15	255.254.0.0	198.18.0.0 - 198.19.255.255	private network	Network Interconnect Device Benchmark Testing (RFC 2544)
198.51.100.0/24	255.255.255.0	198.51.100.0 - 198.51.100.255	documentation	TEST-NET-2 (RFC 5737)
203.0.113.0/24	255.255.255.0	203.0.113.0 - 203.0.113.255	documentation	TEST-NET-3 (RFC 5737)
224.0.0.0/4	240.0.0.0	224.0.0.0 - 239.255.255.255	Internet	Multicast (RFC 3171)
240.0.0.0/4	240.0.0.0	240.0.0.0 - 255.255.255.254	n/a	Reserved for Future Use (RFC 1112, Section 4)
255.255.255.255/32	255.255.255.255	255.255.255.255	n/a	Limited Broadcast (RFC 919, Section 7, RFC 922, Section 7)
IP/CDIR	Subnet mask	Range	Scope	Description