This announcement is to remind you of the previously-announced change of 
address to the Registration Data Access Protocol (RDAP) bootstrap server, 
scheduled for on or about 30 June 2021.

As announced on https://www.arin.net/announcements/20201121/ and each month 
subsequently, the ARIN Registration Data Access Protocol (RDAP) Bootstrap 
server address is changing. The following information is repeated from previous 
announcements:

ARIN is changing the address of our Registration Data Access Protocol (RDAP) 
bootstrap server from https://rdap.arin.net/bootstrap to 
https://rdap-bootstrap.arin.net/bootstrap. A bootstrap server is used to 
forward queries from users seeking registration data for Internet resources to 
another server that can provide more detailed registration information about 
that resource. The address of the bootstrap server is used in the “query URL” 
sent from a client application or entered into a command-line query by a user.

ARIN has set up a redirect to automatically route queries from the old URL to 
the new URL when support for the old URL is ended. The old URL will be retired 
on 30 June 2021, and the redirect will be active. However, it is important to 
note we can’t guarantee the redirect will be respected by all clients. In order 
to avoid any problems, queries should be changed to use the new URL, 
https://rdap-bootstrap.arin.net/bootstrap, as soon as possible.

More information about how the bootstrap URL works and this upcoming change can 
be found on TeamARIN at 
https://teamarin.net/2020/12/11/buckle-up-change-of-address-coming-for-arins-bootstrap-server/.
 If you have questions or comments about this change, please submit an Ask ARIN 
ticket using your ARIN Online account, or contact the Registration Services 
Help Desk by phone Monday through Friday, 7:00 AM to 7:00 PM ET at 
+1.703.227.0660.

Regards,

Mark Kosters
Chief Technology Officer
American Registry for Internet Numbers (ARIN)





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