Internal Revenue Service

Internal Revenue Service is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Government Offices
• Government Offices Federal
• Associations Government, Public Administration

North American Industry Classification System (NAICS) Categories:

• Executive Offices > Executive Offices Federal > Government Offices Federal
• Other General Government Support

Standard Industry Classification (SIC) Categories:

• Executive Offices > Executive Offices Federal > Government Offices Federal
• General Government, Nec