Control-plane-only for detection: One way to detect detours is to use traceroute, analyze reported hops and use latency as an indication of a detour. This approach was followed by [11] that studied peering relationships in Africa; we too use this approach to validate our results on live data. However, we detect detours using only control plane data. This has a number of advantages: 1) Collecting **data** plane information at an Internet scale is hard. It needs infrastructure and visibility provided by Atlas probes or Ark monitors is limited. Moreover, running too many traceroutes from own network to others might lead to blacklisting. 2) Small footprint of our methodology makes it easily reproducible. Any network operator can pull a RIB dump from his/her border router and run Netra to detect detours for prefixes they own.