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Fast paths for common sea cargo questions
Container, B/L, and booking guide
Learn how the three main sea-cargo identifiers differ, who assigns them, and which one tends to appear first in tracking.
Port directory
Browse port guides with UN/LOCODE anchors, line associations, terminal context, and short readable history notes.
Supported carrier pages
Jump from the sea-cargo hub into the shipping line pages Parcels already supports today.
Supported Shipping Lines
Sea lines Parcels can route today
The line directory is meant to feel practical, not decorative: clear logos, stable support badges, and direct links into the existing carrier pages that answer container or bill-of-lading lookups.
Identifier Basics
The three numbers that matter most in sea cargo
Box identifier
The four-letter owner code plus serial and check digit usually tell Parcels which line or equipment family to try first.
Shipment document
The B/L ties the cargo to the carrier's document set, so it is often the best key when the container number is missing or not yet assigned.
Pre-loading reference
A booking number can appear before export gate-in or vessel load, which makes it useful for very early milestones.
Top Ports
Ports where sea cargo tracking gets real context
The port guides stay compact, but each one explains why the port matters, which lines are strongest there, and what usually happens between discharge, transshipment, customs, and final outgate.
Singapore, Singapore
Port of Singapore
Singapore often appears in tracking when boxes change vessels inside the same port complex. A shipment can show discharge, yard moves, and a new departure leg without ever leavi...
Shanghai, China
Port of Shanghai
When Shanghai shows up in tracking, it can mark the true export start of the shipment, a transshipment stop, or the line's final export consolidation point. Booking events, cust...
Hong Kong, China
Port of Hong Kong
Hong Kong shows up in tracking when cargo is crossing between mainland factory belts, feeder networks, and long-haul vessel services. The status trail can look fragmented becaus...
Busan, South Korea
Port of Busan
Busan often appears as a relay port because a large share of its volume is transshipment. Public tracking can show discharge and a later departure without explaining the yard dw...
Dubai, United Arab Emirates
Jebel Ali Port
Jebel Ali shows up in tracking when a container changes service strings, clears a free-zone handoff, or waits for a Gulf relay connection. That makes it common to see a long pau...
Rotterdam, Netherlands
Port of Rotterdam
Rotterdam often shows up well before the consignee sees the cargo. Discharge, customs, barge transfer, rail loading, and terminal appointment delays can all sit between the ocea...
Antwerp, Belgium
Port of Antwerp-Bruges
Antwerp-Bruges often marks the point where import containers split into inland legs after discharge, while export boxes can sit inside complex terminal stacks before the mainlin...
Los Angeles, United States
Port of Los Angeles
When Los Angeles shows up in tracking, discharge is only the first half of the port story. Customs exams, chassis shortages, rail connections, terminal appointments, and off-doc...
Help
Quick answers for sea tracking
Why does sea cargo tracking go quiet for days?
Container trackers often skip yard moves, customs holds, rail plans, and terminal appointment delays. A quiet tracker does not automatically mean the box stopped moving.
What should I use first: container, B/L, or booking?
Use the container number when the box has already been assigned. Use the B/L when the shipment document is clearer than the box number. Use the booking number early, before loading.
Where should I go next?
Open the port guide if one port keeps appearing, or open the shipping line page if the line is already clear from the tracking number or booking documents.
