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 234+ ocean lines.
Any carrier calling Onsan/Ulsan: we detect the line and format automatically.
Onsan/Ulsan appears in 1,746 scheduled port calls in TrackingMCP's sailing database (January 2026 to December 2027 schedule window), with 10 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.
KMTC, Namsung, Heung-A Line lead the 10 carriers with scheduled sailings calling Onsan/Ulsan in TrackingMCP's sailing database. Each line links to its own tracking page below.
Shanghai, Yongdang-Dong, Gwangyang, Incheon, Cát Lái, Tanjung Priok 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.