NMFC code lookup: how to find your NMFC number the right way

An NMFC code lookup sounds like it should be a simple search, and that's exactly why so many shipments get reclassed. The NMFC item number is the line in the National Motor Freight Classification that describes your product and sets its class, or says to use the density scale. This guide explains where a reliable NMFC number comes from, why free tables online cause problems, how to read an item and its subs, and how density helps you estimate until you have the item. We don't reproduce NMFC tables or item numbers; the classification belongs to NMFTA.

The steps below show where an item number legitimately comes from. The pallet underneath estimates density while you look.

What an NMFC item number is

The National Motor Freight Classification lists commodities as numbered items, each with a description and either a class or a rule for finding one. Many items use the density scale; others assign a fixed class based on handling, stowability or liability; many have sub-provisions, or subs, that split the class by density or packaging. The item number, with its sub, is the precise reference that goes on the bill of lading next to the class. Our guide to freight class explains how classes and the density scale work.

Where a reliable NMFC number comes from

NMFTA's own tool. NMFTA publishes the classification and offers ClassIT+ to find the item number, calculate density and confirm the class. It's the authoritative source, and it's kept current.

Source: NMFTA, checked October 2026

Your carrier. LTL carriers apply the classification in their tariffs and can tell you how they rate your product. Ask in writing before you ship, and keep the answer.

Your own records. Past bills of lading and carrier invoices for the same product often show the item and sub. They're a good starting point, but check them against the current classification, because items change.

Why free NMFC tables go wrong

Lists of NMFC numbers circulate online for popular products, and they're tempting. The problems: they're often copied from old versions, they leave out subs, they describe products loosely, and they don't reflect the 2025 changes. Our guide to the NMFC freight class changes (coming soon) explains what moved in 2025 and why old lists can now be wrong for many items. A wrong item can mean a reclass, a rebill and an inspection fee, which costs far more than the lookup.

Reading an item: description, class and subs

When you find a candidate item, read the whole description, not just the first line. Check that your product matches the packaging requirements, any conditions on how it's shipped, and the subs. If the item says to use the density scale, the class depends on your shipment's actual density, measured with the pallet. If it lists subs by density, find the sub your density falls in. The full reference, item plus sub, is what belongs on the BOL.

Using density while you look

For items that use the density scale, density is the number that decides the class, and you can measure it yourself:

1. Measure each piece at its longest, widest and tallest points, including the pallet.
2. Work out cubic feet: length × width × height in inches ÷ 1,728.
3. Weigh the shipment, pallets and packaging included.
4. Divide the weight by the cubic feet.

The freight class and density calculator does the math for several pieces and shows the band on the density scale. It's an estimate until the item confirms the class.

Packaging and the class

Because so many items depend on density, how you pack changes the result. A tightly built pallet without overhang measures smaller and can land in a lower class than the same product stacked loosely. Our packaging and palletizing guidelines (coming soon) cover building pallets that ride well and measure well. Shippers who handle a lot of LTL freight often measure every shipment the same way with a freight cubing solution.

Keep a product item list

If you ship the same products again and again, build a simple list: each product, its NMFC item and sub, the class, the packaging it's shipped in, and the date you confirmed it. Recheck the list when the classification changes, when you change packaging, and at least once a year. A current list means every bill of lading goes out with the same, correct line, and anyone in your shipping office can prepare it.

When the carrier disagrees with your item

Sometimes a carrier inspects a shipment and applies a different item or sub than the one on your BOL. Ask for the carrier's inspection record and the item it used, then compare it with the classification. If your item is right, send your reasoning and your measurements and ask for the bill to be corrected. If the carrier is right, update your product list so the next shipment goes out correctly. Either way, deal with it in writing and keep the exchange with the shipment. Repeated disagreements on the same product are a sign the product list needs a fresh look, ideally with the carrier on the phone.

A routine for small shippers

For a small business shipping LTL a few times a month, a simple routine prevents most problems. Before the first shipment of any new product, confirm the item with NMFTA's tool or the carrier. Measure and weigh every shipment, pallet included, rather than estimating. Put the item, sub, class, piece count and weight on every BOL. And keep a photo of each pallet with a tape measure on it, which takes thirty seconds and settles most disputes.

Fresh produce, clothing and other common searches

People often search for the NMFC number of a specific product, like fresh fruit or clothing. We don't list them, for the reasons above: the right item depends on the exact product, the packaging and the current classification, and getting it from an unofficial list is how reclasses happen. The method is the same for any product: search the classification by description, read the item and its subs, and confirm with your carrier.

What to check and document

If a carrier reclasses your freight, your measurements and the item you used are what you dispute with. Keep them with the shipment.

For carriers, the NMFC line on a bill of lading is the shipper's responsibility, but density shows up in every partial load you haul. Our dry van dispatch desk matches partial freight to your floor and payload, and you approve every load. Send an application.