Previous literature had accentuated the importance of close ground infrastructure (Ground Stations and Points of presence) on the network performance of Starlink. In order to further investigate this relation, a new method was defined, based on IPv4traceroute, to identify the PoP associated with a Starlink user. This method has been evaluated for 95 RIPE Atlas probes connected to the Starlink network and the results have been mapped in an interactive web-tool. Using this data, a strong correlation between latency and proximity to ground infrastructure was verified.