Communication apparatus having an indicator that indicates a function service of a terminal apparatus

An internal terminal that connects to a DNS server, the server storing and managing a telephone number and an external NAPTR record, the internal terminal including a terminal communication controller that accesses the DNS server and notifies the DNS server of a telephone number for an inquiry; a terminal-side controller that obtains, when the DNS server is informed of the inquiry telephone number, an external NAPTR record being corresponding to the inquiry telephone number; and a display that displays destination service functions selected from the obtained external NAPTR record.