 and Routers. RFC 5555, Internet Engineering Task Force, June 2009. 45. 3GPP. Numbering, addressing and identification. TS 23.003, 3rd Generation Partnership Project (3GPP), March 2012. 46. Mockapetris, P. V. Domain names - implementation and specification. RFC 1035, Internet Engineering Task Force, November 1987. 47. Braden, R. Requirements for Internet Hosts - Application and Support. RFC 1123, Internet Engineering Task Force, October 1989. 48. Elz, R. and Bush, R. Clarifications to the DNS Specification. RFC 2181, Internet Engineering Task Force, July 1997. 49. 3GPP. Domain Name System Procedures; Stage 3. TS 29.303, 3rd Generation Partnership Project (3GPP), June 2011. 50. GSMA. GSMA PRD IR.40 'DNS/ENUM Guidelines for Service Providers and GRX/IPX Providers'. PRD IR.40 7.0, GSM Association (GSMA), May 2012. 51. Deering, S. and Hinden, R. Internet Protocol, Version 6 (IPv6) Specification. RFC 2460, Internet Engineer- ing Task Force, December 1998. 52. Kent, S. and Seo, K. Security Architecture for the Internet Protocol. RFC 4301, Internet Engineering Task Force, December 2005. 53. Society, I.C. Part 3: IEEE Standard for Information technology-Specific requirements - Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifi- cations. IEEE Standard for Information Technology 802, Institute of Electrical and Electronics Engineers Standards Association (IEEE-SA). 54. 3GPP. GSM - UMTS Public Land Mobile Network (PLMN) Access Reference Configuration. TS 24.002, 3rd Generation Partnership Project (3GPP), December 2009. 55. 3GPP. Network architecture. TS 23.002, 3rd Generation Partnership Project (3GPP), September 2011. 56. 3GPP. AT command set for User Equipment (UE). TS 27.007, 3rd Generation Partnership Project (3GPP), December 2011. Deploying IPv6 in 3GPP Networks 57. 3GPP. International Mobile station Equipment Identities (IMEI). TS 22.016, 3rd Generation Partnership Project (3GPP), April 2010. 58. Droms, R. Dynamic Host Configuration Protocol. RFC 2131, Int