Zone Delegation Checker
This tool can be used to check a reverse zone setup in the DNS. It follows the routines that the RIPE NCC uses for reverse zone delegation. You can use it by entering the domain name of the zone you wish to check, and hitting the submit button.
Although we only use it for 'prospective' reverse zones, it is almost equally applicable for existing zones and forward zones. For that reason we have made it accessible from the RIPE NCC website.
The emphasis of the routine is on checking delegations. The only DNS records which are checked at each nameserver are:
- the NS records
- the SOA resource record and its content.
Additional checks the RIPE NCC may perform when delegating a reverse zone include the number and/or names of nameservers and RIPE Whois Database authorisation information. These checks are not included in this tool.
More information on how to get reverse delegations from RIPE NCC.
Notes
- The checker needs to query the DNS and sometimes run diagnostic tools so it may take some time before a page is fully loaded.
- Supporting information on the checker error codes, and extended problem descriptions.
- If you wish to check a zone directly, you can do so with a URL like: http://www.ripe.net/cgi-bin/delcheck2.cgi?zone=zone.to.check (replace zone.to.check with the name of the zone).
