Jeju Special Self-Governing Province's official public-service information introduces the 'Jeju 120' contact centre. Within Jeju, dial 120 without an area code to ask about provincial and city administration and practical services. The government page lists opening hours of 7 a.m.–10 p.m. every day, year-round. The general guidance page also contains some older administrative material, so confirm current live operating hours before relying on this schedule.
The published service categories include local festivals and events, public transport and tourism enquiries, complaints and practical welfare or local-government information. For example, you can ask which public agency to contact about a visitor service or local event. The hotline is an information service, not a guarantee of seats or bookings at individual attractions.
Use the relevant emergency number rather than the tourism contact line for police, fire or medical emergencies. The official page does not establish which foreign languages are supported or how to dial from abroad; do not assume these services are available.