MPAN, or Meter Point Administration Number, is a unique identifier used in the United Kingdom to recognize individual electricity supply points. Each MPAN is a distinctive number that helps in accurately identifying and billing electricity usage. It's found on electricity bills and is often referred to as a 'Supply Number' or 'S-Number.' The MPAN is crucial for energy suppliers, network operators, and consumers, particularly when switching suppliers or resolving billing issues. The number is structured in a specific format, with parts indicating the supplier code, distribution area, and a unique meter identifier.