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:

• Access One, Inc.
• Access Point, Inc.
• Accessline Communications Corporation
• Affordable Voice Communications, Inc.
• Allegiance Telecom of Washington, Inc.
• AT&T Communications (Consumer Services)
• AT&T Communications (Business Services)
• Cbeyond Communications, LLC
• CenturyTel
• ClearWorld Communications Corporation
• Coast International, Inc.
• Comcast Digital Phone
• CSK Communications, Inc.
• Electric Lightwave
• Embarq Corporation
• Encompass Communications, L.L.C.
• Eschelon Telecom of Washington, Inc.
• Global Crossing
• Hood Canal Telephone Co., Inc.
• Horizon Telecom, Inc.
• International Telcom, Ltd.
• Kalama Telephone Company
• LDC Telecommunications, Inc.
• Locus Telecommunications, Inc.
• Master Call Communications, Inc.
• OLS, Inc.
• OneLink Communications, Inc.
• Pac-West Telecomm, Inc.
• Qwest Corporation
• Snip Link, LLC.
• Sprint
• TDS Telecom
• Teledias Communications, Inc.
• TeleUno, Inc.
• Toledo Telephone Company, Inc.
• Touchtone Communications, Inc.
• TTI National, Inc.
• Verizon
• Verizon Northwest
• Wahkiakum West Long Distance, Inc.
• Whidbey Telephone Company
• World Communications, Inc.