How does HLR work?

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  1. #results
  2. #opera
  3. #simple
  4. #engine
  5. #obtains
  6. #services
  7. #lookups
  8. #obtain
  9. #message
  10. #serving
  11. #sending
  12. #information
  13. #mobile
  14. #lookup
  15. #signaling
  16. #queries
  17. #appropriate
  18. #process
  19. #network