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IPv6 Transition Policy

2025/02: All IPv6 Transition steps have been completed and our backbone network is now in full IPv6-only operation.

Dear users, ISPs and stakeholders:

IANA's IPv4 resources have been exhausted, and although nearly half of DN42's IPv4 resources remain, the overall shift to IPv6 on the Internet is a general trend.

Therefore, under our repeated consideration, we decided to completely terminate IPv4 content services in 2021 and only retain IPv4 Transit services. At the same time, considering compatibility, we will consider cooperating with services such as 464XLAT and NAT64 to continue to provide customers with the IANA network IPv4 access in.

The entire migration plan will be divided into three steps:

  • Before Jan, we will ensure that every service provided is reachable with IPv6 and will abolish some IPv4 services.

  • Before Feb, we will resolve all domain names only to IPv6 addresses, and abolish IPv4 authoritative and recursive DNS.

  • Before March, we will deploy IANA's 464XLAT service, stop the announcement of DN42 IPv4, and completely terminate the provision of DN42 IPv4 access to customers.

During the transfer process, the service may be abnormal or inaccessible, please understand. The application and promotion of IPv6 are inseparable from your support and cooperation.