What Is Customs Data — and How to Actually Use It (With Real Examples)

Key Takeaways

• Customs data is the official record every government keeps of goods crossing its borders — collected from importer and exporter declarations, bills of lading, and manifests filed with agencies like U.S. Customs and Border Protection (CBP), India's Directorate General of Foreign Trade (DGFT), and General Department of Vietnam Customs.

• 4 types of custom data: bill of lading (BOL) shipment data, customs declarations, tariff/HS data, and aggregate trade statistics — each answers a different question and comes from a different source.

• Roughly 40+ countries publish company-level import data, including the US, India, Vietnam, Brazil, Mexico, Pakistan, and Peru. The EU, China, Japan, and Korea do not release shipment-level records publicly, which is why proxy data through partner countries matters.

• According to the WTO, global merchandise trade hit $26.26 trillion in 2025 — every shipment in that flow leaves a customs paper trail, and a meaningful fraction of it is searchable.

• The five highest-leverage workflows are buyer discovery, supplier verification, competitor monitoring, market sizing, and compliance screening — each takes hours, not weeks, with the right access.

What Customs Data Actually Is

Every time goods cross a border, somebody files paperwork. The exporter files an export declaration. The carrier files a manifest and bill of lading. The importer files an entry summary with the destination country's customs authority. That paperwork — depersonalized, aggregated, and in many countries published — is what the trade industry calls customs data.

It's not the same as the trade statistics you see on the WTO or UN Comtrade sites. Those are aggregated to the country–HS-code level. Customs data, in the sense practitioners mean it, is company-level and shipment-level: which company in Long Beach received which container, on which vessel, on which date, with what HS code, declared at what value.

That granularity is what makes it commercially useful. A market-statistics report tells you Vietnam exported $72.97 billion of HS 8517 (telephone equipment) in 2025. A customs database tells you Samsung Electronics Vietnam Thai Nguyen Co., Ltd. shipped X containers to Y destinations on Z dates — that's the difference between a Bloomberg headline and a sales prospect list.

Pull live shipment records, exporter profiles, and HS-code-level breakdowns from yTrade's customs database trusted by 1,000+ leading companies.

The Four Types of Customs Data

Practitioners lump everything under "customs data," but it actually breaks into four distinct types, with different sources and different fields.

Type	Source	Granularity	Example fields	Best used for
Bill of lading (BOL) data	Carrier filings (e.g., AMS for US imports)	Per shipment	Shipper, consignee, vessel, port, container, HS code, weight	Finding active buyers/suppliers
Customs declarations	Importer/exporter filings	Per entry	Importer of record, declared value, duty paid, country of origin	Tariff and value research
Tariff & HS data	Customs authorities (e.g., HTS Online, TARIC)	By HS code, by trading-pair	MFN rate, FTA rate, ADD/CVD rate	Landed-cost calculation
Aggregate trade statistics	WTO, UN Comtrade, national stat offices	Country × HS × month	Total value, volume, partner share	Market sizing

In day-to-day work, when somebody says "pull the customs data on this importer," they almost always mean the BOL data type — because that's the one tied to a named company.

Move from raw customs data to actionable insights with yTrade's customs-direct records — unlimited search across all tiers, no HS code limits.

How Fields Differ Between BoL And Declaration Data

A common mistake is treating BOL data and declaration data as interchangeable. They are not.

• A BOL is a carrier-filed document focused on the physical movement of goods — who shipped, on what vessel, in what container.

• A customs declaration is an importer-filed document focused on the legal entry of goods — what value was declared, what duty applied, what country of origin was claimed.

Most public US import databases are built on AMS BOL filings, not on the Automated Commercial Environment (ACE) declaration data, which CBP keeps non-public.

That's why you'll often see shipment volumes on a public platform but not the dutiable value the importer actually paid. Knowing which dataset you're looking at saves you from wrong conclusions.

Which Countries Publish Customs Data (and Which Don't)

This is the single most useful map you can have when starting research, and most blogs skip it. Here's the practitioner's view as of 2026:

Publishes company-level import/export data	Does not publish company-level data
United States (AMS — sea imports + bonded land)	China
India (DGFT data via licensed resellers + ICEGATE)	European Union (privacy-protected)
Vietnam	Japan
Mexico	South Korea
Brazil	Australia (limited)
Argentina, Chile, Peru, Colombia, Ecuador, Paraguay, Uruguay	Canada (mostly limited)
Pakistan, Bangladesh, Sri Lanka	Russia (since 2022 restrictions)
Philippines, Indonesia (partial)	Most of Africa (limited)
Ukraine, Turkey	Switzerland
Costa Rica, Panama, Dominican Republic	UK (post-Brexit, limited)

When you need to research trade with a non-publishing country, the workaround is mirror data: if you can't see what China exports, you can read US, Vietnam, Mexico, and Brazil import records and reconstruct the picture from the destination side. About 70% of China's outbound trade can be observed this way.

Search billions of customs-direct shipment records across 200+ countries by HS code, exporter, importer, and trade lane on yTrade.

How Customs Data Gets Collected and Released

Knowing the supply chain of the data itself helps you judge quality. A typical US import record travels this path:

1. Carrier files an AMS manifest 24 hours before the vessel sails (the "24-hour rule" enforced by CBP since 2003)

2. CBP processes the filing at the receiving port

3. CBP releases redacted bulk data under Freedom of Information Act (FOIA) requests, typically with a 4–6 week lag

4. Aggregators ingest, dedupe, and enrich the data — adding normalized company names, parent-company linking, HS-code corrections, and search indexes

5. End users access through APIs, dashboards, or exports

For India, the path is similar but the source is daily DGFT publications on ICEGATE, distributed via a network of authorized resellers. Vietnam customs data flows through the General Department of Vietnam Customs with a comparable lag.

The lag matters. If a buyer started importing this week, you won't see it on a public platform for at least 30 days. Premium platforms with direct ingestion pipelines compress that to about 10 days for the US.

Five Workflows Real Importers and Exporters Run

The "what is" is theory. Here's the "what for" — five workflows that account for almost all real-world use of customs data.

1. Buyer discovery (find who's buying what you sell)

Filter US import records by your HS code, sort by shipment frequency, and you have a list of active buyers. A Vietnamese furniture exporter searching HS 9403 in US BOL data finds 340+ active importers in 24 months — most of whom they'd never reach through Alibaba.

For more details, read the expert yTrade guide: How to Find Overseas Buyers for Export.

2. Supplier verification (confirm the factory is real and active)

Pull a candidate supplier's export shipment history. Continuous shipments to brand-name buyers = legit. No shipments in the last 6 months, or shipments only to forwarders, are red flags.

yTrade's expert insights on How to Verify a Chinese Supplier Using Customs Data. Read now.

3. Competitor shipment monitoring

Set alerts on a competitor's name in import records to catch new product launches, sourcing changes, and volume shifts. When Pelican Products shifts manufacturing from one country to another, it shows up in BOL data weeks before any press release.

4. Market sizing for entry decisions

Combine BOL volumes with HS-code-level statistics from UN Comtrade to estimate market share before committing to a launch. A solar inverter manufacturer can confirm whether the addressable US import market is $400M or $4B before hiring a sales team.

5. Compliance and sanctions screening

Cross-reference shipment counterparties against OFAC's Specially Designated Nationals (SDN) list, the EU Consolidated Sanctions List, and the BIS Entity List. Customs data shows you who actually moved goods — denial-list checks tell you whether anyone in that chain is restricted.

Check out Denied Party Screening Best Practices by yTrade's expert.

Free vs Paid: Where to Actually Get the Data

Source	Cost	Coverage	Refresh	Use it when
CBP FOIA bulk download	Free	US sea imports only	4–6 weeks	Researching one-off shipments
UN Comtrade	Free (with limits)	Country × HS aggregates	Quarterly	Market sizing, not company research
USA Trade Online (usatrade.census.gov)	Free	US aggregates	Monthly	Statistics, not company-level
ImportYeti / Volza free tier	Free with caps	US-centric	~Monthly	Quick checks, low volume
ImportGenius / Panjiva	$$$	50+ countries	Days	Established workflow
yTrade	$$	200+ countries via mirror data	~Daily for major lanes	Multi-country research, sanctions check, contact insights

Free sources are fine for one-off checks. The moment you need to do research weekly, the time you spend wrangling FOIA spreadsheets exceeds any subscription cost.

For full comparison on which platform to choose, explore yTrade comprehensive comparison on top global trade data platforms in 2026.

Common Mistakes of Using Custom Data

• Treating BOL value as duty value. BOL declared values are commercial values from the carrier — they're not the dutiable value CBP collected on. They're directionally useful, not legally precise.

• Searching by short company names. "Apple" returns thousands of false positives. Always include the full legal entity name (e.g., "Apple Inc.") and check parent–subsidiary mapping.

• Forgetting the 6-month window. Many platforms default to a 6- or 12-month lookback. A buyer who imported heavily 18 months ago and stopped won't show up — set a 24-month window for any due-diligence work.

• Ignoring HS-code variation by country. A 6-digit HS code is universal, but the 8- or 10-digit extensions are country-specific. The US uses HTS, the EU uses Combined Nomenclature, and others have their own. Match the code length to the country you're querying.

Why yTrade Is The Top Customs Data Platform For Trade Teams

yTrade gives importers, exporters, sales, sourcing, compliance, and strategy teams direct access to customs records covering 70% of world trade across 200+ countries — already trusted by 1,000+ leading companies.

• Billions of customs-direct records searchable by HS code, exporter, importer, port, and trade lane with no daily limits and no HS code caps

• 6 dedicated modules covering trade activity, compliance screening, supply chain transparency, buyer discovery, entity contacts, and competitor monitoring

• Built-in sanctions screening against global watchlists, PEPs, and adverse media at the point of decision

• Verified B2B contacts included in the subscription, not charged per contact

• From $99/month with monthly or annual billing — no procurement committee, no enterprise lock-in

Stop pulling customs data from disconnected sources and switching between tools. Connect shipment records, counterparty profiles, and compliance signals in one workflow.

Talk to the yTrade team.

Frequently Asked Questions

What is customs data in simple terms?

Customs data is the record of goods crossing a country's borders, derived from the paperwork importers, exporters, and carriers file with customs authorities. The most commercially useful slice is bill-of-lading data, which names the importer and supplier per shipment, plus the HS code, port, and volume. About 40 countries — including the US, India, Vietnam, Brazil, and Mexico — publish company-level data; the EU, China, Japan, and Korea do not.

Is customs data the same as trade statistics?

No. Trade statistics (from the WTO or UN Comtrade) are aggregated to the country–HS-code level. Customs data, as practitioners use the term, is shipment-level and company-level — it tells you which specific company imported a specific shipment. Statistics tell you market size; customs data tells you who the customers are.

How accurate is customs data?

Coverage and freshness are the right metrics, not "accuracy." Public US BOL data is essentially complete for sea imports but excludes air, postal, and bonded-warehouse moves. India's DGFT data has high coverage but a 30–60 day lag. China and the EU do not publish at the company level at all — for those countries, accuracy depends on mirror data quality. Always check a platform's stated coverage and lag for the specific country/mode you care about.

How do I access customs data for free?

Three options: download CBP's FOIA-released vessel manifests directly (US sea imports, 4–6 week lag), query UN Comtrade for country-level aggregates, or use the free tiers of platforms like ImportYeti or Volza. Free sources have caps on results and country coverage; for systematic research a paid platform pays for itself quickly.

Can I see customs data for China or the EU?

Not directly — neither publishes company-level shipment records. The workaround is mirror data: read what China's trading partners (US, Vietnam, Mexico, Japan) report on their own import side. About 70% of China's exports can be reconstructed this way. For EU-internal trade, mirror data has gaps, but external EU imports are visible through the partner countries.

What's the difference between a bill of lading and a customs declaration?

A bill of lading is a carrier document about the physical movement — who shipped, on what vessel, in what container. A customs declaration is an importer document about the legal entry — declared value, duty paid, country of origin claimed. Most public databases use BOL data because customs declaration data is typically not released. Both are "customs data" in casual usage, but they answer different questions.