Blog

Guides on HS code classification, customs duties, and international shipment tracking.

Need to follow a shipment? Use Universal Shipment Tracking or browse the supported carrier directory.

• Container Numbers Explained: ISO 6346 and Check Digits

  2026-10-06 — Read an ISO 6346 container identifier, understand owner codes and equipment categories, and check why a valid number does not prove the carrying line.

• Container Number vs Bill of Lading vs Booking Number

  2026-10-06 — Choose the right ocean freight reference for equipment or shipment tracking, and learn why container, bill of lading and booking searches are different.

• How to Spot Fake Delivery and Customs-Fee Messages

  2026-10-06 — Verify unexpected parcel, failed-delivery and customs-payment messages safely using official tracking and support, without trusting a message link or logo.

• How to Track Air Cargo with a Master Air Waybill

  2026-10-06 — Follow airline cargo with the correct master AWB, check handling milestones and split shipments, and distinguish arrival from release and final delivery.

• How to Identify a Carrier from a Tracking Number

  2026-10-06 — Find a likely carrier from parcel, postal, container and AWB formats. Learn why numbers overlap and how to confirm the right official tracking page.

• International Shipment Tracking Statuses Explained

  2026-10-06 — Understand label created, in transit, customs clearance, out for delivery and freight milestones without confusing movement, release and final delivery.

• Shipment Held at Customs: Documents, Duties and HS Codes

  2026-10-06 — Work through a customs hold by verifying the carrier’s request, checking shipment documents and classification, and contacting the responsible broker or customs authority.

• Tracking Not Found or Not Updating: What to Check

  2026-10-06 — Check the carrier, shipment reference, handover and latest scan when tracking is missing or stale, and prepare a useful follow-up with the sender or carrier.

• Tracking Number Formats: Courier, Postal, Container and AWB

  2026-10-06 — Compare common tracking number patterns for couriers, international post, shipping containers and airline AWBs, with examples and detection limitations.

• What Is an AWB Number? Prefixes, Check Digits and House AWBs

  2026-10-06 — Understand airline air waybill numbers, three-digit prefixes, modulo-seven check digits, and the difference between master, house and courier AWBs.

• How to Find the HS Code for Any Product

  2026-03-15 — A step-by-step guide to finding the correct Harmonized System code for your product using official tools and our free lookup.

• What is an HS Code? Complete Guide for Beginners

  2026-03-12 — Learn what HS codes are, how they work, and why they matter for international trade. A beginner-friendly guide to the Harmonized System.

• HS Code vs HTS Code — What's the Difference?

  2026-03-10 — Understand the difference between HS codes (global 6-digit) and HTS codes (US 10-digit). How they relate and when to use each.

• HS Code vs HSN Code — India's Classification System Explained

  2026-03-08 — Understand the difference between global HS codes and India's HSN codes. How they relate, GST implications, and how to find the right code.

• How to Read an HS Code — Decode Any Tariff Code in 60 Seconds

  2026-03-05 — Learn how to read and interpret HS codes. Break down any 6-digit code into section, chapter, heading, and subheading with examples.

• 10 Common HS Code Classification Mistakes (And How to Avoid Them)

  2026-03-01 — The most common HS code classification errors that lead to wrong duties, customs delays, and penalties. Learn how to avoid them.