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IP range: - ( , IPv4

IP Range organization responsible: ARIN (North America)

This range is also known as "Class A" and it contains 16,777,216 (16M) IP addresses with the first address starting at and the last address of this range ends at

When using the CIDR range (Classes Inter Domain Routing) classification it is also typical to call this range Since IPv4 addresses are represented using 32 bits, this way of writing describes the range as all the addresses where the first 8 bits are preserved from the address That means that there are 8 bits which are constant, and 24 bits that are changing. Hence, 16M addresses.

According to our current records, this range belongs to and is under the supervision of ARIN. The American Registry for Internet Numbers (ARIN) is the regional internet registry for Canada, the United States, and many Caribbean and North Atlantic islands.

More inner ranges are usually associated seperately to different private organizations, so if you're interested in finding out which organization controls any specific inner ranges within this global range, you can browse deeper into the IP addresses themselves where we have a WHOIS tool that can reveal this information.