Container Tracking by BL Number
— The Complete Guide
Everything importers, exporters, and freight professionals need to know: what a Bill of Lading is, how to track sea cargo by BL number, and free tools for MSC, Maersk, CMA CGM, ONE Line, PIL, and more.
🌊 Track Your Cargo Free210+ carriers · No account required
In this guide
- What is a Bill of Lading?
- The three core functions
- Who issues the Bill of Lading?
- What is BL number tracking?
- How to track — step by step
- Best free tracking tools
- Tracking by carrier
- BL vs Sea Waybill
- Types of Bill of Lading
- Fields on a Bill of Lading
- Related documents
- Templates & Downloads
- Frequently asked questions
What is a Bill of Lading?
Meaning, pronunciation, and origin
A Bill of Lading (B/L or BOL) is a legally binding document issued by a carrier to a shipper, confirming that specific goods have been received for transportation. It specifies the type, quantity, condition, origin, and destination of the cargo. It simultaneously functions as a receipt, a contract of carriage, and — most critically — a document of title to the goods.
Bill of Lading pronunciation
This trips up nearly everyone in shipping. The word “lading” is pronounced /ˈleɪdɪŋ/ — rhyming with “fading,” not “landing.” The word derives from the Old English “hladan,” meaning to load. So it is bill of LAY-ding, not “bill of LAD-ing” or “bill of LAND-ing.”
Bill of Lading origin
The Bill of Lading is one of the oldest instruments in international commerce, dating back to at least the 15th century in Mediterranean trade. Under English law, it is governed by the Carriage of Goods by Sea Act 1992. Most international ocean shipments fall under the Hague Rules, the Hague-Visby Rules, or the Hamburg Rules — all of which mandate the carrier to issue the shipper a bill of lading identifying the goods.
The Bill of Lading is the key that unlocks the goods at destination. Without it — or a proper release procedure — no legitimate carrier will hand over the cargo.
— Fundamental principle of international maritime law
The three core functions of a Bill of Lading
Every Bill of Lading simultaneously serves three distinct legal functions. Understanding all three is essential for anyone tracking cargo or managing international trade finance.
Receipt of Goods
The carrier’s formal acknowledgement that goods were loaded in the stated condition. A clean B/L means no damage was noted. A “dirty” B/L records exceptions — banks often refuse these under Letters of Credit.
Contract of Carriage
Contains the terms under which the carrier agrees to transport the goods — route, freight charges, liability limits, and applicable conventions. This contract governs any dispute between shipper and carrier.
Document of Title
The most important function. The B/L names the consignee with the legal right to claim the goods. Ownership transfers by endorsement. Banks use the original B/L as collateral in Letter of Credit transactions.
Who issues the Bill of Lading?
The carrier — the shipping line or their authorised agent — issues the Bill of Lading after the vessel departs from the port of loading.
Shipper submits Shipping Instructions
After a booking is confirmed, the shipper (or their freight forwarder) submits accurate shipping instructions: cargo description, HS codes, weight, marks, and shipper/consignee details.
Carrier prepares a B/L draft
The carrier generates a draft B/L for the shipper’s review. Errors are expensive to correct after the vessel sails — check carefully.
Vessel departs — B/L is issued
The formal Bill of Lading is issued only after the vessel has sailed from the load port. This is the document whose number you will use for container tracking by BL number.
Original B/L sent to consignee (or bank)
Three original B/Ls are typically issued and travel to the consignee via courier or banking channels. The consignee presents one original to the carrier at destination to collect the goods.
What is container tracking by BL number?
Container tracking by BL number (also written as “BL tracking” or “bill of lading tracking”) is the process of using a Bill of Lading reference number as the search key to retrieve real-time location and status information about your sea cargo shipment.
When you enter a B/L number into a tracking platform, the system queries the carrier’s data (and/or AIS vessel transponder data) to return:
How to track sea cargo by Bill of Lading
Locate your B/L number
Find the B/L number on your Bill of Lading document, shipping instruction confirmation, or the carrier’s booking confirmation email. It typically appears in the top-right area of the B/L. MSC numbers often begin “MEDUC…”; Maersk follows formats like “MAEU…”; CMA CGM begins with “CMA…” or “OPU…”.
Choose your tracking method
Options: (a) go directly to the carrier’s own tracking page — free and accurate but requires a separate visit per carrier; (b) use a multi-carrier platform like SeaRates, which covers 210+ lines from one search box; (c) integrate via API for bulk shipments.
Enter the B/L number
Type or paste the B/L number exactly as it appears — no spaces, no hyphens unless they are part of the number. Good platforms auto-detect the carrier from the B/L format.
Review the tracking results
You will see a timeline of events, vessel details, port milestones, and an ETA. If your shipment involves transshipment, you will see the intermediate port and connecting vessel. Note that tracking data may lag 6–24 hours behind real-time vessel positions.
Set up notifications
Most platforms offer email or SMS alerts for key events: vessel departure, arrival at transshipment, port of discharge arrival, and container release — especially important for avoiding demurrage charges.
Enter your B/L, container number, or booking reference across 210+ carriers in one place — for free.
🌊 Start Tracking Free →Free container tracking online: best tools in 2026
Covers 210+ shipping lines including MSC, Maersk, CMA CGM, ONE Line, PIL, Evergreen, and COSCO. Accepts container number, B/L, or booking number in one search field with auto-detection. Includes interactive world map, vessel tracking, and ETA. The most comprehensive free multi-carrier option available. Free tier: 1 shipment/month unregistered; 5/month with a free account.
🌊 Track Your Cargo on SeaRates →Free, no account needed. The official Maersk tracking portal accepts container numbers, B/L numbers, and parcel tracking numbers. Accurate and real-time for all Maersk-operated services.
Track at maersk.com ↗Free, no account needed. MSC B/L tracking is available directly on the MSC website. MSC is the world’s largest container shipping line by fleet capacity — for the most accurate MSC BL tracking, always check msc.com directly.
Track at msc.com ↗Free, no account needed. The world’s third-largest container line, covering subsidiary brands ANL, CNC, APL, and Containerships. Accepts B/L, booking, and container numbers.
Track at cma-cgm.com ↗Free, no account needed. Ocean Network Express (ONE Line) was formed from K Line, MOL, and NYK. Their portal handles all legacy and current ONE BL numbers, including “ONEY…” and “MOLU…” formats.
Track at one-line.com ↗Free, no account needed. Pacific International Lines (PIL) is a major Singapore-based carrier with strong Asia–Africa and Asia–Middle East presence. PIL B/L numbers typically begin with “PILC” or “PABV”.
Track at pilship.com ↗BL tracking by carrier reference guide
Track all of these carriers in one place. SeaRates aggregates 210+ shipping lines — paste your B/L, container number, or booking reference once.
🌊 Try SeaRates Free →Bill of Lading vs Sea Waybill — key differences
The B/L and Sea Waybill are both issued by carriers and both serve as evidence of contract of carriage. However, one fundamental difference changes how goods can be collected and how trade finance works.
| Feature | Bill of Lading (B/L) | Sea Waybill (SWB) |
|---|---|---|
| Document of title? | Yes — holder has legal right to goods | No — not a document of title |
| Negotiable? | Yes — can be endorsed and transferred | No — only named consignee can claim |
| Original required? | Yes — one original must be presented | No — consignee identified by name only |
| Used in Letters of Credit? | Yes — banks require original B/Ls | Rarely — banks prefer B/Ls |
| Speed of cargo release | Slower — originals must travel to consignee | Faster — no original document needed |
| Goods sold in transit? | Yes — ownership transfers by endorsement | No — cannot transfer to a new party |
Choose a Bill of Lading when…
- The shipment is under a Letter of Credit
- Goods may be sold during transit
- You need documentary control of cargo
- The consignee is unknown at time of shipment
- International regulations require a B/L for customs
Choose a Sea Waybill when…
- Shipper and consignee are the same company
- You want fast cargo release without original documents
- Open account trade with a trusted buyer
- The cargo will arrive before the original B/L
- You want to minimise document courier costs
Types of Bill of Lading
Negotiable (Order) Bill of Lading
Made out “to order” or “to order of [bank].” Can be transferred to a third party by endorsement, allowing goods to be sold multiple times during transit. The standard instrument in Letter of Credit trade finance.
Straight (Non-Negotiable) Bill of Lading
Made out to a specific, named consignee. Cannot be transferred. The named consignee is the only party who can collect the goods. Common in domestic shipping and intercompany transfers.
Clean Bill of Lading
Issued when the carrier receives the goods in apparent good order with no exceptions noted. This is what banks require for Letter of Credit payment.
Claused (Dirty) Bill of Lading
Notes defects, damage, or discrepancies at time of loading — e.g. “bags torn,” “shortage of 10 cartons.” Banks will typically reject this under an L/C and it can complicate cargo insurance claims.
Through Bill of Lading
Covers multimodal transport across multiple legs — for example, sea freight combined with inland rail or truck — under a single contract and document. The issuing carrier takes responsibility for the entire journey.
House B/L vs Master B/L
A freight forwarder issues a House B/L (HBL) to the shipper. The ocean carrier issues a Master B/L (MBL) to the freight forwarder. For tracking purposes, you usually need the MBL number to query the carrier’s system directly.
What fields are on a Bill of Lading?
A standard ocean Bill of Lading contains the following key information fields — the same fields you will need when filling in a B/L template (Excel or PDF):
Bill of Lading template, PDF, and Excel downloads
A good Bill of Lading template (Excel or PDF) should cover a header section (shipper, consignee, notify party, B/L number, booking reference), a routing section (port of loading, port of discharge, place of delivery, vessel name/voyage), a cargo section (container numbers, seal numbers, cargo description, package count, weight, volume), and a terms section (freight prepaid/collect, number of originals, place and date of issue, carrier signature).
Where to find Bill of Lading templates
Reliable sources for a bill of lading free template include FIATA (International Federation of Freight Forwarders Associations), which publishes standardised FBL templates; BIMCO (Baltic and International Maritime Council), which provides standard voyage charter party B/L forms; your freight forwarder’s platform, as most TMS and freight management systems include built-in B/L templates; and individual carrier websites for Maersk, MSC, and CMA CGM, where B/L drafts are generated digitally via their online business portals.
Frequently asked questions
What is BL tracking?
BL tracking (or bill of lading tracking) is the process of entering a B/L number into a carrier or third-party tracking system to get real-time updates on the location, status, and ETA of a sea freight shipment. It is the most convenient way to monitor an entire shipment because one B/L can cover multiple containers.
Is bill of lading tracking free?
Yes — bill of lading tracking is free on all major carrier websites (MSC, Maersk, CMA CGM, ONE Line, PIL, Hapag-Lloyd, Evergreen, COSCO, etc.). Multi-carrier platforms like SeaRates offer free tiers with limited monthly searches. For bulk or API-based tracking, paid plans are available from several providers.
How is vessel tracking by container number different from BL tracking?
Vessel tracking by container number uses the physical container’s unique 11-character ISO code (e.g. MSCU1234567) to track one specific box. BL tracking uses the bill of lading reference number and returns all containers covered by that shipment document. BL tracking is better for tracking a full commercial shipment; container number tracking is better for monitoring individual boxes and demurrage management.
How do I find my MSC BL number?
Your MSC B/L number appears on the physical Bill of Lading document issued by MSC or your freight forwarder. It also appears in the MSC shipping confirmation email and on the MSC e-Commerce portal. MSC B/L numbers typically begin with “MEDUC” for Mediterranean origins. If you have a House B/L from a freight forwarder, ask them for the corresponding Master B/L number.
What is ONE Line BL tracking?
ONE Line (Ocean Network Express) is the result of the 2018 merger of the container businesses of K Line, MOL, and NYK. ONE Line BL tracking uses the B/L number issued by ONE for post-merger shipments. Legacy B/Ls from K Line, MOL, or NYK may still be reachable via ONE’s portal, or may require direct contact with ONE’s customer service.
What is the difference between a Bill of Lading and a Waybill?
The fundamental difference is negotiability and title. A Bill of Lading is a document of title — the holder has legal right to the goods, and ownership can be transferred by endorsement to a third party. A Sea Waybill is not a document of title — the named consignee simply identifies themselves to collect the cargo. Waybills are faster and simpler but cannot be used as collateral in Letter of Credit transactions.
Who issues the Bill of Lading — the shipper or the carrier?
The Bill of Lading is issued by the carrier (the shipping line), not the shipper. The shipper prepares and submits shipping instructions to the carrier, who uses that information to generate the B/L. A freight forwarder may issue a House B/L in their own capacity as a transport intermediary, but the ocean carrier’s Master B/L is always the primary carrier-issued document.
What is a Certificate of Origin and how does it relate to a Bill of Lading?
A Certificate of Origin (CO) is a separate document that certifies the country where the goods were manufactured or produced. It is required by the destination country’s customs authority to determine import duties and verify eligibility for preferential tariff rates. The B/L and CO are both required at customs but serve different purposes — the B/L proves the shipment; the CO proves the origin of the goods.
Can I track a container if I only have a booking number and not a B/L yet?
Yes. Most carrier portals and multi-carrier platforms like SeaRates accept booking numbers as a tracking input. Booking number tracking gives you pre-departure milestones such as gate-in confirmation and equipment availability. However, full voyage tracking only becomes available once the vessel has departed — at which point the B/L number becomes the primary reference.
Track Your Containers Now
Use a free multi-carrier tracking tool to monitor your sea cargo by B/L number, container number, or booking reference — across 210+ shipping lines from one search.
🌊 Start Tracking Free on SeaRates →No account required · MSC · Maersk · CMA CGM · ONE Line · PIL · 205 more carriers
This guide covers container tracking by BL number, bill of lading tracking free options, MSC BL tracking, Maersk tracking, CMA CGM tracking, ONE Line BL tracking, PIL tracking by BL number, vessel tracking by container number, sea cargo tracking by bill of lading, bill of lading meaning, bill of lading vs waybill, certificate of origin, bill of entry, and bill of lading templates (PDF and Excel). Updated April 2026. All carrier portal URLs are provided for reference — always verify current URLs directly with the carrier.