Does it look like we’re attacking you?

Some of the most common things we hear are “My network is under attack by IANA!” and “IANA is spamming me!” If you think this is the case, please take a few moments to read this page.

The Internet Assigned Numbers Authority, or IANA, is responsible for the global coordination of IP addresses. Most of the used numbers are allocated via a regional allocation system to your ISP, which then automatically assigns one or more to you.

There are, however, special sets of numbers that are designed not to be assigned to any particular person. Instead, they are general allocations that are either used in special ways, or designed for people to use internally within local networks.

These numbers are primarily in the following ranges:

There are additional ranges of numbers that are also marked as “IANA Reserved” and similarly are not operated by IANA, although these are the most common ones we receive abuse reports concerning.

If you are seeing unexplained Internet traffic to your computer from these numbers, it is important to remember the following things:

For more information on this topic, please read our more detailed Abuse Questions and Answers.