SIC 1623 to NAICS Code Crosswalk
The legacy 1987 SIC code 1623 (Water, Sewer, Pipeline, and Communications and Power Line Construction) maps transitively to modern U.S. Census 2022 NAICS code(s): 237110, 237120, 237130.
Concordance Concordance Mapping Asset
| Source Code | Source Industry | Target Code | Target Industry | Relation | Concordance Path |
|---|---|---|---|---|---|
| SIC 1623 | Water, Sewer, Pipeline, and Communications and Power Line Construction | NAICS 237110 | Water and Sewer Line and Related Structures Construction | One-to-Many | SIC1987:1623 → NAICS1997:23491 → 2002:237110 → 2007:237110 → 2012:237110 → 2017:237110 → 2022:237110 |
| SIC 1623 | Water, Sewer, Pipeline, and Communications and Power Line Construction | NAICS 237120 | Oil and Gas Pipeline and Related Structures Construction | One-to-Many | SIC1987:1623 → NAICS1997:23491 → 2002:237120 → 2007:237120 → 2012:237120 → 2017:237120 → 2022:237120 |
| SIC 1623 | Water, Sewer, Pipeline, and Communications and Power Line Construction | NAICS 237130 | Power and Communication Line and Related Structures Construction | One-to-Many | SIC1987:1623 → NAICS1997:23492 → 2002:237130 → 2007:237130 → 2012:237130 → 2017:237130 → 2022:237130 |
Why Concordances Don't Line Up 1:1
The Standard Industrial Classification (SIC) system was established in 1937 and last updated in 1987, organizing businesses by end products. The North American Industry Classification System (NAICS) replaced it in 1997, classifying establishments by production processes. Because of this structural shift, many-to-many relationships are common, requiring chained concordance steps to bridge the historical gap.
Reverse Crosswalk: Going the other way? See the mapping at NAICS 237110 to SIC, NAICS 237120 to SIC, NAICS 237130 to SIC.
Related Pages & Tools
- SIC Code 1623 Profile — Legacy OSHA definition and associated industrial metadata.
- SIC Major Group 16 Hub — Legacy category group directory.
- Interactive Crosswalk Engine — Convert any SIC or NAICS code dynamically.
Primary Ingestion Source
Data sourced from the U.S. Census Bureau Concordances (1997, 2002, 2007, 2012, 2017, and 2022 editions). Last verified on 2026-06-30.