Industrial Classification By SSIC (2020) Section J : TELECOMMUNICATIONS 61 : TELECOMMUNICATIONS 61 : TELECOMMUNICATIONS 610 : TELECOMMUNICATIONS 6101 : Telecommunications Network Operation 61011 : Wired telecommunications network operation (including fixed-line, fibre optics, local/international PSTN and leased circuits) 61012 : Mobile cellular and other wireless telecommunications network operation 61013 : Satellite telecommunications network operation 6109 : Other Telecommunications Activities 61091 : Telecommunications resellers/third party telecommunications providers (including value-added network operators) 61092 : Internet access providers, include ISPs 61099 : Other telecommunications activities n.e.c. (e.g. provision of VoIP (Voice over Internet Protocol services))