1999ETSI PRETS 300 927-1999 Digital Cellular Telecommunications System (Phase 2+); Numbering, Addressing and Identification Third Edition; GSM 03.03 Version 5.2.0
1998ETSI PRETS 300 927-1998 Digital Cellular Telecommunications System (Phase 2+); Numbering, Addressing and Identification Second Edition; GSM 03.03 Version 5.1.0
1996ETSI PRETS 300 927-1996 Digital Cellular Telecommunications System (Phase 2+); Numbering, Addressing and Identification (GSM 03.03 Version 5.0.1)