NRNIC, the Network Information Reliability Organization, is a Japanese incorporated association that provides Network Information Center (NIC) services in Japan. Its NIC business focuses on managing and allocating IP addresses, alongside providing network services as a registry. The organization’s work relates to the administration of internet address resources and the regional registry framework, in which Regional Internet Registries manage resources across five global regions.

NRNIC also publishes informational articles to help readers understand internet infrastructure and network operations. Topics include what IP addresses are, how regional internet registries work, the depletion of IPv4 addresses and potential responses for businesses, and ways companies can strengthen network reliability. These resources offer background on issues that affect organizations relying on stable, secure networks. The website also provides an overview of NIC services, membership terms, information about the organization, and a contact option. Through its registry-focused services and educational content, NRNIC presents information and services related to IP address administration and the broader reliability of network infrastructure in Japan.