NOTE: Regulated Entities are responsible for registering their company and keeping their registration information current. Information on how to register and maintain company information is available on the Company Registration web page: http://www.ferc.gov/docs-filing/company-reg.asp The grouping of the Traditional Cost of Service Public Utilities by Division identifies the Division primarily assigned tariff filings of these entities within the Office of Energy Market Regulation.

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Note: Most of the links below are external and you will be leaving FERC's website. Electric Reliability Regions FRC FRCC NPCC Most of SERC RTO/ISOs ISO New England, Inc. New York ISO, Inc. Northern Maine ISA PJM Interconnection, LLC Traditional Cost of Service Public Utilities PDF | XLS updated 01/06/2012 Note: Most of the links below are external and you will be leaving FERC's website. Electric Reliability Regions ERCOT MAPP Parts of SERC RTO/ISOs MISO SPP Subject Matter Responsibilities Qualifying Facilities (QFs) Traditional Cost of Service Public Utilities PDF | XLS updated 01/06/2012 Federal Power Administrations PDF | XLS updated 01/06/2012 Note: Most of the links below are external and you will be leaving FERC's website. Electric Reliability Regions WECC RTO/ISOs CA ISO Subject Matter Responsibilities (Electric): Market-Based Rates (including Power Marketers) Mergers & Corporate Information Securities Issuances Traditional Cost of Service Public Utilities PDF | XLS updated 01/06/2012 Market Based Rates Public Utilities PDF | XLS updated 01/06/2012