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What is a Session IP Address?

A session IP address refers to the temporary use of a specific IP address during a single interaction or “session” between a client and a server. A session IP may be static (consistent) or dynamic (assigned by DHCP).

How do session IPs work? When you visit a website, your device connects to the server using an IP address. A session is created, which is tied to your IP address (your “session IP”). The session ends when you log out, close out the browser, or it times out.

Why do session IPs exist? Servers use session IP addresses, along with session IDs, to verify users and protect against session hijacking, ensuring requests come from the same source. In many setups (especially mobile), users may be assigned a new IP address for each new session, or their IP address might change over time, requiring systems to handle changing IP addresses.