https://www.arin.net/resources/manage/irr/
Internet Routing Registry (IRR) - American Registry for Internet Numbers
IRRs contain information - submitted and maintained by ISPs or other entities - about Autonomous System Numbers (ASNs) and routing prefixes. IRRs can be used...
internet routingregistryirramericannumbers
https://www.arin.net/resources/manage/routingsecurity/
Routing Security Eligibility FAQs - American Registry for Internet Numbers
Frequently asked questions about ARIN's Routing Security eligibility.
eligibility faqsroutingsecurityamericanregistry