1. A method comprising: receiving, at a processor, first data indicating a measured strength of an ambient electromagnetic signal in a particular frequency range during a particular time period and at a particular location; receiving, at the processor, second data indicating a bit loading within a portion of a wireline network in the particular frequency range during the particular time period, wherein the portion of the wireline network provides service within a service area proximate to the particular location; determining, at the processor, a correlation of changes in the second data during the particular time period to changes in the first data during the particular time period; and identifying, at the processor, an issue associated with the wireline network based on the correlation.