Dear colleagues, We are excited to announce that the Call for Presentations is now open for RIPE 91, which will take place at the JW Marriott Bucharest Grand Hotel, Romania, from 20-24 October 2025. We invite you to share your insights, experiences, and research with the RIPE community. Whether your expertise lies in Internet operations, security, policy, or emerging technologies, we welcome your proposals for plenary sessions, tutorials, lightning talks, and BoFs (Birds of Feather sessions). Help shape the RIPE 91 agenda and submit your talk and contribute to a vibrant, collaborative event. Please note that the Pretalx submission system will be used for RIPE 91. More information and the link to the submission system is available at: https://ripe91.ripe.net/present/call-for-presentations/ You will need to make a RIPE NCC Access account and enable two-factor authentication in order to access the submission system. Make your RIPE NCC Access account here: https://access.ripe.net/registration Registration & Early Bird Rates Week ticket: EUR 400 (Early Bird €350) Day ticket: EUR 130 (Early Bird €125) Student (week) ticket: EUR 50 Dinner Ticket: EUR 75 Gentle Reminder: Please note that the early bird rate is available until 21 July 2025. You can find more information about ticket options and registration at: https://ripe91.ripe.net/attend/attendee-info/register/ More information about RIPE 91 can be found at: https://ripe91.ripe.net/ Track the #RIPE91 hashtag on social media for the latest updates. See you in Bucharest! Kind Regards, The Meeting Organisation Team