When ARIN was formed in December 1997, it inherited the InterNIC database of existing IP addresses and AS Numbers, as well as the responsibility to maintain its records. These records became known as early registrations.
It was decided by the community the best way to serve the interests of the holders of these early registrations would be to transfer the management of the resources to the applicable RIR according to the region in which the resource holders resided.
The ERX project was completed in February 2005. For a list of resources transferred to the APNIC Whois Database during the project, see:
- IP addresses transferred to APNIC
- AS numbers transferred to APNIC
- Complete list of ERX IP address ranges
- Returned legacy IPv4 address space
Policy changes that affect former ERX ranges
Recovery of unused historical IP addresses
A significant amount of historical address space registered in the APNIC Whois Database is not announced to the global routing table. To recover these globally unrouted resources and place them back in the free pool for reallocation to other networks, APNIC contacted the networks responsible for historical address space in the APNIC region that had not been globally routed since 1 January 1998.
- For more information, see section 4.2.1. of the APNIC Internet Number Resource Policies and the Guide to the recovery of unused address space.
Transferring ERX resources to another network
Holders of historical ERX and AUNIC resources can transfer historical resource registrations to current APNIC account holders.
- For more information, see section 8.3 of APNIC Internet Number Resource Policies.
Making changes to historical resources records
To learn more on how to update and manage your historical resources, see the Updating historical registration guide.