Colleagues of nanog, In 1999, Jeroen and I started SixXS, a project which aimed to provide IPv6 connectivity to users who wanted to learn about the network protocol and gain experience operating IPv6 networks. Our vision was to facilitate migration to IPv6 in content and access providers. We were able to provide IPv6 to 50’000+ individual users and companies in 140+ countries, using servers hosted at 40+ Internet providers in 30+ countries. We are incredibly proud of what we’ve accomplished together, and how many people have gotten to know all about IPv6 due to our combined efforts. We have completed a retrospective and rationale document, which details our experience developing and operating the SixXS tunnelbroker over the last 18 years. We have worked through our plans with the many dedicated ISPs that have been involved: https://www.sixxs.net/sunset/ We have reached out to users recently, giving them 6 weeks to make alternative plans. We have chosen a somewhat symbolic date of 2017-06-06 to turn down the SixXS service. Our website will remain as a tombstone. Please feel free to pass this along to any group or list you feel would benefit from it, and reach out to <info@sixxs.net> or to myself directly <pim@ipng.nl> if you have thoughts you’d like to share between now and then. Kindest Regards, Pim van Pelt and Jeroen Massar (SixXS founders) -- Pim van Pelt <pim@ipng.nl> PBVP1-RIPE - http://www.ipng.nl/