IPv4 Registry Documentation
Request an autonomous system number and check the registration records for IPv4 address space. These guides cover registry requirements, resource holders, and the records used to verify them.
Eligibility, registry requirements, supporting information, and setup after assignment.
Query the right registry, read resource records, and resolve conflicting answers.
For number formats and routing identity, see ASN concepts. To understand route exchange and path selection, see the BGP protocol guide.
To check address boundaries in a registry record, use the subnet calculator.
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