The is a globally distributed database of routing information. The IRR contains announced routes and routing policy in a common format. Network operators use this information to configure their backbone routers.
The IRR consists of many individual , some managed by regional entities, such as APNIC, ARIN, and RIPE. Each routing registry contains IRR entries that provide information about IP prefixes and the that are authorized to announce them.
To announce your subnet prefixes, Cloudflare requires accurate IRR entries for your prefixes and autonomous system numbers (ASNs).