Methods, apparatus, systems and articles of manufacture are disclosed to identify a first request having a first source port number, from a device. Examples disclosed herein determine whether a second request, having a second source port number, is within a threshold number of ports from the first source port number. Examples disclosed herein group the first and the second requests as a first session when the second source port number is within the threshold number of ports from the first source port number, and identify an application associated with the first session.