LACNIC asks holders of legacy IPv4 addresses to confirm their rights by December**
Organisations using internet address resources assigned before the current regional registry system was created must contact LACNIC and show that they are entitled to use them.
LACNIC has launched a process for organisations that hold or use legacy IPv4 address resources in Latin America and the Caribbean.
IPv4 addresses are numerical identifiers used to connect devices and networks to the internet. Autonomous System Numbers (ASNs) identify networks that exchange internet traffic.
The term ‘legacy resources”’ refers to addresses and ASNs assigned by InterNIC or the Internet Assigned Numbers Authority before LACNIC’s regional registry system was established on 28 December 1997. Some of these resources were never placed under a formal membership agreement with LACNIC.
This creates a registry problem. LACNIC may have incomplete or outdated information about who currently controls an address block, whether it has been transferred, and who should be contacted if technical or security issues arise.
The organisation is therefore asking affected resource holders to formalise their relationship with the registry. They must identify themselves as holders or users and provide evidence of a legitimate right to use the resources.
LACNIC’s Registration Services team will explain the required steps after an organisation makes contact.
The process is intended to improve the accuracy and traceability of the regional internet number registry. Reliable records help network operators identify resource holders, coordinate technical matters, and respond to incidents involving misuse or routing problems.
Organisations have six months to contact LACNIC. The deadline is 16 December 2026.
If a holder does not respond by that date, or cannot demonstrate its right to use the resources, LACNIC will stop providing registration services for them.
