Covid 19 Update: Given the current global situation, we have paused the delivery of our LiveOnsite courses, but our LiveOnline and OnlineAnytime Packages remain unaffected. Browse over 50 online courses in our course catalogue, or get in touch to register your interest in future LiveOnsite courses when we are able to safely resume in person training.

PRN - Provide Roaming Number

The MAP PRN message is sent from the HLR to the MSC serving a mobile for which an incoming call is being processed. The message triggers the MSC to forward an MSRN (Mobile Station Roaming Number) to the GMSC via the HLR. This MSRN is used by the GMSC to route the call to the correct MSC.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

Explore NetX today with a
free trial.
More Info about NetX