Toolbox

Freight tools: check what breaks a quote, before you quote

Wrong ZIP, wrong NMFC, wrong class, or a residential address flagged as commercial — any one of them and the carrier reprices, with the gap coming out of your margin. Free, no signup.

What tools does ShipMay offer for free? Free freight tools — U.S. ZIP lookup, NMFC code search, density-based freight class estimation, address classification and AI commodity-to-NMFC matching.
ZIP lookup
// one ZIP often maps to several acceptable city names; the wrong one reads as an address mismatch
▸ ZIP LOOKUP
Enter a 5-digit US ZIP.
NMFC code search
// search by commodity; a wrong code is the single most common cause of a rebill
▸ NMFC SEARCH
Type a commodity or a code.
Results are a reference. The same commodity can fall under different sub-codes depending on packaging or dimensions, and the carrier’s classification governs. We never invent a code that does not exist.
Density → freight class
// inches and pounds; for a pallet, use the palletized dimensions
▸ DENSITY / CLASS
Enter dimensions and weight.
Density is only a starting point. Actual class also depends on commodity, fragility, value density and each carrier’s own rules; where an NMFC code applies, the code’s class governs.
Residential or commercial
// an unflagged residential delivery comes back as a residential surcharge
▸ ADDRESS CLASSIFICATION
Enter a full US address.
AI: describe it, get the code
// plain description works best when it includes packaging and condition
try:
▸ AI CLASSIFICATION 5 req/min
Describe your commodity.
★ The model only picks from codes that actually exist in the NMFC database. It never invents one — an empty result is preferred over a fabricated code.
Confidence is the model’s own estimate, not a guarantee. The carrier’s classification governs — when in doubt, send us the candidates and we will look together.
// These run on the same address and code databases our own freight operation uses — not demo data built for this page.

More Specialized Tools

NMFC Code Lookup

Full 6,663-entry database + AI commodity matching — more complete than the inline version above.

Freight Class Calculator

Estimate freight class from density, with the standard chart.

Address Type Checker

Check residential vs commercial address for LTL surcharge planning.

Hazmat Guide

9 DOT hazard classes, UN number lookup, packaging rules.

Loading Planner

Optimize 53-ft trailer loading and axle weight distribution.

Carrier Lookup

SCAC codes, official tracking links, and service area lookup.

ZIP Lookup

U.S. ZIP to city, state, and timezone — including multi-alias cities.
Want these in your own system? The same capabilities are available over our open API, granted per module.

These tools are pieces of the system

Same classification library, same address logic — running thousands of times a day inside the system. The tools stay free and open. Ready to ship? Register and use the full flow.

Register See the full flow
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Where to next

RATING

Rating & Pricing

NMFC, density class and accessorial validation before the quote goes out

Read →
AI

Grounded AI

Automation on a leash — grounded in real data, escalates when unsure

Read →
CARRIERS

Carrier Integrations

Rating, tender, tracking, documents, webhooks and EDI end to end

Read →
CARRIER-LOOKUP

Carrier Lookup

SCAC codes, official tracking links and general service notes

Read →