Cape Town telephone dialing codes:

International: +27-21
National: 021-
National Directory Enquiries: 1023
To call internationally out of South Africa, dial 00 and then the country code

Cell phones are widely available for hire, as are 'starter packs' with SIM cards if your personal mobile phone is compatible with the South African system. You will need to have your passport and airticket with you to purchase a 'starter pack'.