Sticky sessions

Using Sticky Sessions:

Key	Value	Duration	Examples
session	Any unique identifier of up to 255 characters	No expiration	0, abc, session123

Add a session identifier to keep your requests on the same IP address:

curl --proxy http://isp.joinmassive.com:8000 -U '{PROXY_USERNAME}-session-37:{API_KEY}' ip-api.com

When using sticky sessions:

The first request with a session ID linked to a specific IP address.
All subsequent requests with the same session ID will use that same IP address.
Sessions continue indefinitely unless the session identifier is changed.
Requests that do not have a session ID will automatically be assigned a new IP address.