National & Regional Yellow Pages Service

National & Regional Yellow Pages Service is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Yellow Pages Publishers

North American Industry Classification System (NAICS) Categories:

• Directory And Mailing List Publishers > Publishers Directories & Phone Books > Publishers Yellow Page Phone Books

Standard Industry Classification (SIC) Categories:

• Miscellaneous Publishing > Publishers Directories & Phone Books > Publishers Yellow Page Phone Books