Track any container moving through Onsan/Ulsan and see the port's real activity: carriers calling, scheduled connections. Four independent lenses on every shipment.
The fastest way to follow a container through Onsan/Ulsan is to enter your reference at trackingmcp.com/ports/krons. TrackingMCP detects the carrier and format, then shows carrier milestones, live vessel position, the published schedule, and a forecast ETA on one screen; DCSA-normalised across 241+ ocean lines.
Any carrier calling Onsan/Ulsan: we detect the line and format automatically.
Onsan/Ulsan appears in 101 scheduled port calls in TrackingMCP's sailing database (January 2025 to June 2027 schedule window), with 6 carriers we track calling the port. Track any of them by container, bill of lading, or booking number.
KRONS. The five-character UN/LOCODE (KR for South Korea, plus ONS) identifies Onsan/Ulsan in carrier schedules, booking confirmations, and tracking feeds worldwide.
Enter your container number, bill of lading, or booking reference in the search box above. TrackingMCP auto-detects the carrier and format, then returns live carrier events, the vessel's AIS position, and a forecast ETA. Your first shipment is free, no account needed to start.
Dongjin Shipping, KMTC, SM Line lead the 6 carriers with scheduled sailings calling Onsan/Ulsan in TrackingMCP's sailing database. Each line links to its own tracking page below.
Incheon, Gwangyang, Yongdang-Dong, Hong Kong, Shanghai, Kennedy Town see the most scheduled sailings to and from Onsan/Ulsan in TrackingMCP's sailing database.
Free time is set by each carrier's tariff for South Korea, not by the port. The TrackingMCP free-time reference lists published demurrage and detention free days for South Korea by carrier, and the tracker watches the free-time clock on every shipment.