Submit amendments to the List
In order to make the Public Suffix List as current and accurate as possible, we would like top-level domain registries to maintain their section of the List.
There are only three easy steps to carry out:
- Inspect your section of the List
- Submit any additions, removals or amendments
- Maintain your section of the List with changes
Inspect your section of the List
Go to the List and find your top-level domain, and then check the rules that are already there for accuracy.
Submit any additions, removals or amendments
If there are any additions, removals or amendments to be made, list them using the correct format for submissions and email them to us.
Maintain your section of the List with changes
Once in a while, carry out the above steps again so that your section of the List remains current and accurate.
By carrying out these steps, you'll be helping browser users by increasing both the security of their information and also the ease-of-use of their favourite browser.
Format for submissions
Your email should have two sections: one for additions and one for deletions. If a rule needs to be amended, list it in the deletions section, and list the correct rule in the additions section.
Rules should be in the following format:
- There should be one rule per line.
- Each rule should list the entire public suffix, with the subdomain portions separated by dots (.) as usual. A leading dot is optional.
- The wildcard character * (asterisk) will match any valid sequence of characters.
- Wildcards may only appear as an entire level of a rule. That is, they must be surrounded by dots (or implicit dots, at the beginning of a line).
- An exclamation mark (!) at the start of a rule marks an exception to a previous wildcard rule. An exception rule will be used instead of any other matching rule.
Here is an example:
com
*.uk
// Hosts in .hokkaido.jp can't set cookies below level 4...
*.hokkaido.jp
*.tokyo.jp
// ...except hosts in pref.hokkaido.jp, which can set level 3.
!pref.hokkaido.jp
!city.shizuoka.jp
!metro.tokyo.jp
The example above would be interpreted as follows:
- Cookies may be set for <anything>.com.
- Cookies may be set for <anything>.<something>.uk.
- Cookies may not be set for <anything>.uk (implicit from previous rule).
- Cookies may be set for <anything>.<something>.hokkaido.jp and <anything>.<something>.tokyo.jp.
- Cookies may not be set for <anything>.hokkaido.jp or <anything>.tokyo.jp (implicit from previous rules).
- Cookies may be set for pref.hokkaido.jp, city.shizuoka.jp and metro.tokyo.jp, even though the previous rule would not allow it.
Email address for submissions
Please note that all emails must originate from your registry's domain, otherwise they will be rejected. For each email received by us, a confirmation will be sent. The confirmation email makes sure that only genuine submissions are included in the List.
The email address for submissions is: