Traditional, fully regulated telecommunications companies must file "tariffs" with the UTC describing their monopoly services and must ask for approval of any changes. Many traditional companies also maintain electronic versions of tariffs on their own web sites, though not always in an easy-to-find place.

Competitive telecommunications companies usually describe their services in a catalog. These catalogs are also usually available on the company's website.

The UTC does not maintain a comprehensive list of the companies' tariff and price list web sites, but a number are listed below:

• 3U Telecom, Inc.
• AboveNet Communications, Inc.
• Access One, Inc.
• Access Point, Inc.
• Accessline Communications Corporation
• Advanced Telemanagement Group, Inc.
• Affordable Voice Communications, Inc.
• Allegiance Telecom of Washington, Inc.
• Asotin Telephone Company
• AT&T Communications (Consumer Services)
• AT&T Communications (Business Services)
• Beaver Creek Telephone Company
• Bell Atlantic Communications, Inc.
• BellSouth Long Distance, Inc.
• Better World Telecom, Inc.
• Broadwing Communications, LLC
• Cbeyond Communications, LLC
• CenturyTel
• Cincinnati Bell Any Distance, Inc.
• ClearWorld Communications Corporation
• Coast International, Inc.
• Cognigen Networks, Inc.
• Comcast Digital Phone
• Communications Network Billing, Inc.
• Convergia, Inc.
• Covad Communications Company
• CSK Communications, Inc.
• Custom Teleconnect, Inc.
• Custom Teleconnect
• Dancris Telecom, LLC
• Dialaround Enterprises, Inc.
• Electric Lightwave
• Embarq Corporation
• Encompass Communications, L.L.C.
• Enhanced Communications Group, L.L.C.
• Eschelon Telecom of Washington, Inc.
• Excel Telecommunications, Inc.
• Global Crossing
• Granite Telecommunications, LLC
• Hood Canal Telephone Co., Inc.
• Horizon Telecom, Inc.
• International Telcom, Ltd.
• Kalama Telephone Company
• LDC Telecommunications, Inc.
• Locus Telecommunications, Inc.
• Master Call Communications, Inc.
• MCI
• McLeodUSA
• OLS, Inc.
• OneLink Communications, Inc.
• Pac-West Telecomm, Inc.
• Pannon Telecom, Inc.
• Pilgrim Telephone Inc.
• Qwest Corporation
• Snip Link, LLC.
• Sprint
• TDS Telecom
• Teledias Communications, Inc.
• TeleUno, Inc.
• Toledo Telephone Company, Inc.
• Total Call International, Inc.
• Touch 1 Communications, Inc.
• Touchtone Communications, Inc.
• Trinsic Communications
• TTI National, Inc.
• U.S. Telecom Long Distance
• Verizon Select Services, Inc.
• Verizon Northwest
• Wahkiakum West Long Distance, Inc.
• Whidbey Telephone Company
• World Communications, Inc.
• XO Long Distance Services, Inc.
• YesTel, Inc.
• Z-Tel Communications, Inc.