We provide a list of webpages containing child sexual abuse images and videos to companies that choose to block or filter this material to protect their users and to prevent the repeated victimisation of the children depicted. The list is updated twice daily, with URLs added and removed as content is identified or taken down.

During 2025:

A total of 260,699, unique URLs were included on the list.
On average, 1,212 URLs were added each day (compared with 1,129 per day in 2024).
The list contained an average of 6,923 URLs on any given day.

The URL list is dynamic, with entries added and removed daily.

Our remit is to issue notice and takedown requests (also known as takedown notices) for websites hosted in the UK only. For content hosted outside the UK, we notify the appropriate international hotlines and law enforcement agencies so that action can be taken locally.

We conduct daily checks of the IWF URL List. If content is not removed within an appropriate timeframe, the IWF may issue removal notices directly to the relevant hosting provider in the country where the content is hosted. Once the criminal content has been taken down, the associated URLs are removed from the list to ensure it remains as accurate and up to date as possible.