SIC Industry Group 421 - Trucking and Courier Services, except Air
Official 3-digit SIC industry group · OSHA SIC ManualSICCODE.com / SIC Lookup / E Transportation & Public Utilities / 42 Motor Freight Transportation and Warehousing / SIC 421
… / 42 Motor Freight Transportation and Warehousing / SIC 421
At a glance
At a glance
Companies
Contains
4 four-digit SIC industries View child industries ↓
Related NAICS
About SIC Industry Group 421
SIC 421 groups related industries in Trucking and Courier Services, except Air. These activities are organized into 4 more specific 4-digit SIC industries.
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Companies in SIC 421 — Trucking and Courier Services, except Air
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Example companies in this industry
- Steelman Transportation Inc Springfield, MO
- Holland Inc Holland, MI
- C.R. England West Valley City, UT
What's included in a business list? See available data fields, including contacts, classifications, firmographics and more.
A delivered list can include company, address, phone, website, NAICS and SIC, employee size, sales, location type, contacts and titles, and Record Grade. Field availability varies by record and country. Canadian deliveries do not include business email addresses.
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SICCODE.com industry counts reflect verified business locations available for purchase. Headquarters and branches are counted separately, with each location classified by its primary NAICS and SIC industry. Duplicate locations are consolidated, and records that do not meet our verification standards are excluded. Counts represent available commercial business records, not all businesses operating in an industry.
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Key facts for SIC 421 industry group
- Classification level
- 3-digit industry group (OSHA SIC Manual)
- Industry group
- 421 · Trucking and Courier Services, except Air
- Major group
- 42 Motor Freight Transportation and Warehousing
- Four-digit industries
- 4 4-digit industries
- Official source
- OSHA SIC Manual
SIC Classification Hierarchy
Four official SIC levels, plus a more detailed commercial classification level.
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Industry Group · Official 3-Digit 421 Trucking and Courier Services, except Air
One example classification path is shown. Other branches may exist. The 6-digit Marketing Level is a commercial extension, not an official SIC classification.
This page
421 Trucking and Courier Services, except Air
4-digit industries
Other industry groups
42 Motor Freight Transportation and Warehousing
How we classify companies in SIC 421
See how SICCODE.com evaluates individual businesses using documented activities and official SIC definitions. These examples demonstrate our classification approach.
71,986 verified U.S. business locations
- CRST International Inc Cedar Rapids, IA
- National Retail Systems Inc North Bergen, NJ
- United Parcel Service Inc Atlanta, GA
- Schneider National Inc Green Bay, WI
- JB Hunt Transport Services Inc Lowell, AR
- R And L Carriers Wilmington, OH
- Watkins Associated Industries Inc Atlanta, GA
- Werner Enterprises Inc Omaha, NE
Multi-location companies will have additional locations in the full database.
NAICS crosswalk for SIC 421 - Trucking and Courier Services, except Air
Correspondences in NAICS for SIC 421 - Trucking and Courier Services, except Air. These mappings do not replace the official SIC definition.
| System | Code | Title |
|---|---|---|
| SIC This page | 421 | Trucking and Courier Services, except Air |
| NAICS | 4841 | General Freight Trucking General Freight Trucking |
| NAICS | 4842 | Specialized Freight Trucking Specialized Freight Trucking |
| NAICS | 4921 | Couriers and Express Delivery Services Couriers and Express Delivery Services |
| NAICS | 4922 | Local Messengers and Local Delivery Local Messengers and Local Delivery |
| NAICS | 5621 | Waste Collection Waste Collection |
Sources for SIC 421
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Official classification source U.S. Occupational Safety and Health Administration.
Standard Industrial Classification Manual, SIC 421. OSHA SIC Manual → -
SICCODE.com commercial data Company-record counts, coverage, and related commercial data are maintained by SICCODE.com. Methodology →
SICCODE.com is an independent publisher. Official SIC titles and definitions come from the OSHA SIC Manual; commercial database counts are SICCODE.com records.
Citations & Academic Recognition · 50+ documented references
About this classification
This page combines the official SIC definition with classification analysis, crosswalks, and SICCODE.com commercial data. Classifications are reviewed regularly by the SICCODE.com Industry Classification Team.