In [9] authors focus on routing policies and point out cases where routing decisions taken by ASes do not conform to expected behavior. There are complex AS relationships, such as, hybrid or partial transit which impact routing. Such relationships may lead to false positives in our results. However, the paper points out that most violations of expected routing behavior caused by complex AS relationships are very few and most violations were caused by major content providers. Our work identifies detours for variety of ASes, including both large content providers and small institutions. Moreover, in [24] authors argue that such incongruities are caused due to incorrect IP to AS mappings. About 60% of mismatches occur due to IP sharing between adjacent ASes. Authors here show that 63% to 88% of paths observed in control plane are valid in **data** plane as well. The work in [14] also analyzes the control plane (RIBs and AS paths) to construct a network topology and then uses traceroute to construct country-level paths. The goal of this work was to understand the role of different countries that act as hubs in cross-country Internet paths. Their results show that western countries are important players in country level internet connectivity.