Category Archives: 2026

The October 2026 Issue

This October 2026 issue contains five papers.

The technical paper, IPv6 Hitlist Service: Lessons Learned From 10 Years of Operation, by Oliver Gasser, Lion Steger, Patrick Sattler, and Johannes Zirngibl offers a retrospective on 10 years of operating the IPv6 Hitlist Service, a popular resource for IPv6 measurement. The paper discusses technical changes to the service
over time, a coverage analysis comparing the hitlist to flow data from an ISP and Tier-1 network, results from a user survey, and a set of best practice recommendations.

The technical paper, A Multi-Dimensional Analysis of Broadband Performance at Community Anchor Institutions, by Jiayi Liu, David Choffnes, Alexander Gamero-Garrido, Michael Wasser, and Elizabeth Belding presents the results from a large-scale study of broadband performance and stability at Community Anchor Institutions (CAIs), e.g., libraries, schools and community centers. The authors find significant differences in performance between urban and rural CAIs, indicating that broadband inequality remains a persist problem.

In the editorial, AIMS 2026 Workshop Report, kc claffy presents a summary of the 19th Workshop on Active Internet Measurements (AIMS-19) held at the Center for Applied Internet Data Analysis
(CAIDA) at UC San Diego.

The editorial paper, From SRM to NDN: Lessons on Data-Centric Communication from Three Decades of Networking, by Tianyuan Yu, Adam Thieme, Junxiao Shi, Lan Wang, and Lixia Zhang presents a restrospective view of 30-year old work on scalable-and-reliable-multicast (SRM). The paper argues that reliable multicast can be achieved more effectively by means of the basic, network-level communication mechanisms of Named Data Networking (NDN), and that NDN is a better network architecture for group communication than traditional TCP/IP. To paraphrase the reviewers, these unorthodox ideas deserve to be heard.

In Unknown Is Not False: On Negative Results and the Limits of Inference, Fabián E. Bustamante presents an editorial based on his keynote presentation at the 2026 ACM Workshop on Negative Results in Network Measurements (NetNeg). In this thought-provoking article, the author argues that having insufficient evidence to validate a hypothesis can itself be a meaningful scientific result.

I hope that you will enjoy reading this new issue.

The July 2026 Issue

This July 2026 issue contains three technical papers.

The first paper, The Carrier Pigeon Internet Protocol: An Algorithmic (and Lighthearted) Perspective by Matthias Bentert, Shay Kutten, Darya Melnyk, Tijana Milentijević,, and Stefan Schmid is an amusing read that investigates protocols and complexities of communication networks based on carrier pigeons. While lighthearted in nature, the paper is technically grounded in classic mathematical techniques used to analyze modern computer networks. This creative paper is both entertaining and informative—in fact, the paper proposes follow-up work that I’d love to see.

The second paper, A DualPI2 Module for Mahimahi: Behavioral Characterization and Cross-Platform Analysis by Nawel Alioua, Linghe Zhang, Aneesh Garg, Francis Y. Yan, and Elizabeth Belding describes the development of a modular implementation of the DualPI2 active queue management logic integrated into the Mahimahi network emulator. The authors use the DualPI2 module to analyze Low Latency, Low Loss, and Scalable Throughput (L4S) protocol and congestion control technologies, comparing the emulated results with real execution in the kernel. The artifacts should be useful to other researchers in the L4S space.

The third paper, From robots.txt to ai.txt: Mapping the Evolution of Web Permissions in the Age of AI by Felix Hoffmann, Tobias Goergens, Sonal Khosla, and Vaibhav Bajpai presents a measurement study that attempts to quantify the adoption of AI-oriented policy and descriptor files (e.g., (ai.txt, llms.txt, llms-full.txt) and analyze their use. The paper provides a useful analysis for understanding how website operators are responding to AI-driven crawling.

I hope that you will enjoy reading this new issue.

The April 2026 Issue

This April 2026 issue contains one technical paper and one editorial paper.

The technical paper, When the Lights Go Out: Internet Resilience During the 2025 Iberian Power Outage, by Oliver Hohlfeld, Yasin Alhamwy, Tobias Striffler, Daniel Wagner, and Matthias Wichtlhuber studies the impact of a major power outage in Spain and Portugal on the region’s Internet connectivity. Through an extensive, data-driven analysis, the authors provide insights on how the loss of electricity affects both end-users and core network infrastructure. This study will help inform the design of resiliency strategies to guard against future, similar disruptions.

The second paper, an editorial, An Experience Report on Artifact Evaluation in Brazilian Conferences, by Tiago Heinrich, Diego Kreutz, Roben Lunardi, Rodrigo Mansilha, Vinicius Fulber-Garcia, Lourenco A. Pereira, and Rafael R. Obelheiro describes the process for conducting artifact evaluation at conferences in Brazil. The authors provide insights into the challenges they faced and the solutions they adopted to address them. This editorial will not only help conference organizers facing similar challenges, but also provide more insight to authors
about the evaluation process.

I hope that you will enjoy reading this new issue and welcome comments and suggestions on CCR Online or by email at ccr-editor@sigcomm.org.