> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/237310/ # NAICS code 237310: Highway, Street, and Bridge Construction The companies classified under NAICS 237310, where they are based, how big they are and how the code maps to SIC. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** NAICS 237310 is the code for Highway, Street, and Bridge Construction, in sector 23: Construction. The companies counted under it are mostly small: 77% have 200 or fewer employees, and 79% are headquartered in the United States. ## What is NAICS 237310? NAICS 237310 is the code for Highway, Street, and Bridge Construction. It belongs to sector 23: Construction. NAICS, the North American Industry Classification System, is the standard U.S. government agencies use to sort businesses by what they mainly do, and each digit narrows the category. Most of the companies counted also carry SIC 1611, Highway and street construction, in the older SIC system (60%). NAICS is a North American system, so companies outside the US, Canada and Mexico are placed in it by classification. - 46% of the companies counted have 50 or fewer employees, and the middle one is in the 51 to 200 range. - The largest group is headquartered in the United States (79%). Within the US, California is the biggest state (12%). - Most were founded in the 2000s (19%), then the before 1960 (19%). **Figure: How NAICS 237310 is built.** The code 237310 split into its parts: sector 23, then subsector, industry group, NAICS industry and U.S. industry. *The six digits of NAICS 237310. Each digit narrows the category.* ## Which companies are classified under NAICS 237310? The biggest by headcount range include Kiewit, Bouygues Construction, Webuild, El Seif Engineering Contracting and Archirodon Group N.V.. Names link to a company profile where we have one. | Company | Headquarters | Employees | | --- | --- | --- | | [Kiewit](https://enrich.chat/company/kiewit/) | Omaha, NE | 10,001+ | | El Seif Engineering Contracting | Riyadh, Saudi Arabia | 10,001+ | | [Fulton Hogan](https://enrich.chat/company/fulton-hogan/) | Christchurch, New Zealand | 10,001+ | | Apco Infratech | Lucknow, India | 10,001+ | | [EEI](https://enrich.chat/company/eei/) | Quezon City Manila, Philippines | 10,001+ | | Ncc | Hyderabad, India | 5,001 to 10,000 | | Af Gruppen | Oslo, Norway | 5,001 to 10,000 | | Tutor Perini | Sylmar, CA | 5,001 to 10,000 | | Tristar Engineering & Construction | Abu Dhabi, United Arab Emirates | 5,001 to 10,000 | | Soma Enterprise | Hyderabad, India | 5,001 to 10,000 | | Sew Infrastructure | Hyderabad, India | 5,001 to 10,000 | | H.G. Infra Engineering | Jaipur, India | 1,001 to 5,000 | | Ashoka Buildcon | Nashik, India | 1,001 to 5,000 | | [Costain Group](https://enrich.chat/company/costain-group/) | London, United Kingdom | 1,001 to 5,000 | | Clough | Perth, Australia | 1,001 to 5,000 | | The Lane Construction | Charlotte, NC | 1,001 to 5,000 | | Sundt Construction | Tempe, AZ | 1,001 to 5,000 | | Atrium Quality Contractors | Cairo, Egypt | 1,001 to 5,000 | | Zachry Construction | San Antonio, TX | 1,001 to 5,000 | | Agility Engineering & Contracting | Abudhabi, United Arab Emirates | 1,001 to 5,000 | | Ames Construction | Burnsville, MN | 1,001 to 5,000 | | Itd Cementation India | Mumbai, India | 1,001 to 5,000 | | Heb Construction | Manukau., New Zealand | 1,001 to 5,000 | | Alberici Constructors | St. Louis, MO | 1,001 to 5,000 | | Stadsbader | Harelbeke, Belgium | 1,001 to 5,000 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## Where are NAICS 237310 companies based? The largest groups are headquartered in the United States (79%), India (6%) and the United Kingdom (5%). **Figure: Where companies in NAICS 237310 are based.** Bars for the share of counted companies in NAICS 237310 headquartered in each country: United States 79%, India 6%, United Kingdom 5%, Canada 2%, Germany 1%. *Share of counted companies in NAICS 237310 by headquarters country.* Within the United States, California (12%), Florida (8%) and Texas (6%) lead. **Figure: US headquarters of companies in NAICS 237310, by state.** A tile map of the United States shaded by the share of counted US companies in NAICS 237310 headquartered in each state. The largest are California 12%, Florida 8%, Texas 6%. *Share of counted US companies in NAICS 237310 by headquarters state. The three largest states are outlined.* ## How big are the companies counted for NAICS 237310? 46% of them have 50 or fewer employees, and the middle one is in the 51 to 200 range. Companies with fewer than 11 employees are not counted. **Figure: Size of companies in NAICS 237310.** Seven columns for the share of counted companies in NAICS 237310 in each employee range: 11 to 50 46%, 51 to 200 31%, 201 to 500 11%, 501 to 1,000 5%, 1,001 to 5,000 5%, 5,001 to 10,000 1%, 10,001+ 1%. *Share of counted companies in NAICS 237310 in each employee range.* ## How old are NAICS 237310 companies? Most were founded in the 2000s (19%), then the before 1960 (19%). **Figure: When companies in NAICS 237310 were founded.** Eight columns for the share of counted companies in NAICS 237310 founded in each era: Before 1960 19%, 1960s 7%, 1970s 12%, 1980s 13%, 1990s 16%, 2000s 19%, 2010s 14%, 2020s 1%. *Share of counted companies in NAICS 237310 by the era they were founded in, for the ones that list a founding year.* ## How NAICS 237310 compares - 46% of companies in NAICS 237310 have 50 or fewer employees, against 60% across all NAICS codes on this site. - 15% were founded in 2010 or later, against 30% across all NAICS codes on this site. ## NAICS 237310 and the SIC system NAICS replaced SIC in 1997, but the two do not line up one to one: companies filed under one NAICS code can carry several SIC codes. These are the ones seen most. | Code | Title | Share of counted | | --- | --- | --- | | SIC 1611 | Highway and street construction | 60% | | [SIC 1622](https://enrich.chat/sic/1622/) | Bridge and tunnel construction | 10% | | SIC 1629 | Heavy construction | 6% | | [SIC 1542](https://enrich.chat/naics/236220/) | Nonresidential construction | 5% | | SIC 1623 | Water, sewer and utility construction | 3% | | SIC 8711 | Engineering services | 3% | ## Where NAICS codes come from NAICS is maintained by the U.S. Census Bureau with Canada and Mexico and revised every five years; the current edition is NAICS 2022. To check exactly what a code includes, search the [official NAICS index](https://www.census.gov/naics/) or read the Census Bureau's [guide to understanding NAICS](https://www.census.gov/programs-surveys/economic-census/year/2022/guidance/understanding-naics.html). Pick a code by what a company mostly does, not by who it sells to. ## How do you reach the people at NAICS 237310 companies? The people to talk to are usually owners, operations and procurement leaders. You can build the list from this code in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 237310 (Highway, Street, and Bridge Construction) ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the owners, operations and procurement leaders at companies with NAICS code 237310, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore Others in sector 23: [NAICS 238220: Plumbing, Heating, and Air-Conditioning](https://enrich.chat/naics/238220/)[NAICS 236220: Commercial and Institutional Building](https://enrich.chat/naics/236220/)[NAICS 238990: All Other Specialty Trade Contractors](https://enrich.chat/naics/238990/)[NAICS 236115: New Single-Family Housing Construction](https://enrich.chat/naics/236115/)[NAICS 238210: Electrical Contractors and Other Wiring](https://enrich.chat/naics/238210/)[NAICS 238160: Roofing Contractors](https://enrich.chat/naics/238160/)[NAICS 237210: Land Subdivision](https://enrich.chat/naics/237210/)[NAICS 236118: Residential Remodelers](https://enrich.chat/naics/236118/) ## Frequently asked questions ### What is NAICS code 237310? NAICS 237310 is the code for Highway, Street, and Bridge Construction, in sector 23: Construction. ### What is the SIC code for NAICS 237310 (Highway, Street, and Bridge Construction)? 60% of the companies counted carry SIC 1611 (Highway and street construction), but the two systems do not map one to one. ### Which companies are classified under NAICS 237310? The biggest by headcount range include Kiewit, Bouygues Construction, Webuild, El Seif Engineering Contracting and Archirodon Group N.V.. The page lists 25 with links to their profiles where we have them. ### Where are NAICS 237310 companies based? The largest groups are headquartered in the United States (79%), India (6%) and the United Kingdom (5%). ### How big are the companies in NAICS 237310? 46% have 50 or fewer employees, and the middle one is in the 51 to 200 range. Companies with fewer than 11 employees are not counted. ### Is NAICS 237310 the same as a SIC code? No. NAICS replaced SIC as the U.S. federal standard in 1997, and the two do not map one to one. The SIC code seen most among these companies is 1611. ## Try this prompt Find the people at NAICS 237310 companies ```text Use www.enrich.chat to find the owners, operations and procurement leaders at companies with NAICS code 237310, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)