
Knowing which electricity distribution area you are in is important for understanding who your electricity network operator is. Transmission networks are like motorways, moving electricity quickly over long distances, while distribution networks are like smaller roads, bringing electricity to your home. Your electricity distribution area is determined by your address, and you can find your network operator by looking up the 'Distributor ID' number on your electricity bill or by calling your distribution network operator.
| Characteristics | Values |
|---|---|
| How to find your electricity distribution area | The code on your electricity bill contains a 'Distributor ID' number, which can help you find your network operator. You can also find your local electricity distribution network operator by calling 105 (if you live in England, Scotland, or Wales) or 03457 643643 (if you're in Northern Ireland). |
| Difference between transmission and distribution networks | Transmission networks are like motorways, moving electricity quickly over long distances. Distribution networks are like smaller roads, bringing electricity to your home. |
| Difference between energy supplier and network operator | Your network operator is not the same as your energy supplier. The Retail Electricity Provider (REP) sells energy plans, while the Transmission and Distribution Utility (TDU) delivers that energy to your home. |
| Choosing your electricity provider | You can choose your electricity provider, but your TDU is determined by your address since only one company manages the power grid for a specific area. |
| TDU responsibilities | Your local TDU is responsible for power grid maintenance in your area and is who you call in the event of power outages and other emergencies. |
| Example TDUs | Oncor, CenterPoint, AEP Texas North, AEP Texas Central, TNMP, and LP&L. |
| Example service areas | Oncor serves most of the Dallas/Fort Worth metropolitan area, and CenterPoint serves Houston. AEP Texas North serves Abilene and surrounding areas, and AEP Texas Central serves Corpus Christi and the Rio Grande Valley. |
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What You'll Learn

Distributor ID number on electricity bill
The distributor ID number on your electricity bill is a unique identifier that represents your electricity connection. It is a code that helps energy companies keep track of your electricity usage and billing. This number is important for various purposes, such as paying your bills, addressing billing issues, and accessing online portals or customer service support.
The distributor ID number can be found on your electricity bill, usually under sections like "Consumer Information," "Account Details," or "Consumer ID." It may also be referred to as a consumer number, consumer ID, or account ID, depending on your electricity provider and region. You can locate this number on any of your previous or current bills.
If you are having trouble finding your distributor ID number, you can contact your distribution network operator (DNO). Your DNO is responsible for helping connect your home to electricity and can provide information about your distributor ID number. In England, Scotland, or Wales, you can call 105 for free to reach your DNO. In Northern Ireland, the number to call is 03457 643643.
It's important to note that your network operator is different from your energy supplier. The distributor ID number helps identify which network operator manages your connection. This information can be useful if you need to report a power cut or have other inquiries related to your electricity distribution.
By understanding the purpose and significance of the distributor ID number on your electricity bill, you can effectively manage your electricity connection, address billing concerns, and access the necessary support from your distribution network operator.
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Network operator vs. energy supplier
Your network operator is different from your energy supplier. Your electricity network operator maintains the wires that bring electricity to your home or business. They help connect your home to electricity and can move your electricity meter. They also fix power cuts that aren't caused by a problem inside your home.
Your energy supplier, on the other hand, is the company that you pay to use electricity. They are the company that bills you for your energy usage. An MPAN (Meter Point Administration Number) is a unique ID for your electricity supply that helps energy companies keep track of your electricity usage and send the correct bills.
Distribution networks are like smaller roads that bring electricity to your street and home. Transmission networks, on the other hand, are like motorways that move large amounts of electricity quickly over long distances. Some homes and businesses are connected to independent distribution networks, which are managed by Independent Distribution Network Operators (IDNOs). IDNOs focus on specific areas to ensure electricity flows smoothly in those places. They are regulated by Ofgem and are responsible for any issues or maintenance on their networks.
If you're unsure who your electricity supplier is, your distribution network operator (DNO) should be able to tell you. You can find your DNO by calling 105 for free if you live in England, Scotland, or Wales, or by calling 03457 643643 if you're in Northern Ireland. You can also enter your postcode on the Energy Networks Association website to find your local DNO.
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Independent distribution networks
The UK has 14 electricity distribution networks owned by six companies. These companies are responsible for delivering electricity to homes and businesses within their specific regions. Distribution network operators (DNOs) are also known as distribution system operators (DSOs) and they operate the electric power distribution system.
Independent Distribution Network Operators (IDNOs) are smaller, local electricity distribution networks that are connected to a DNO. Since 2004, Ofgem has allowed independent electricity distribution networks to connect between the existing DNOs and new property developments.
IDNOs are responsible for the design, construction, and legal permissions to enable smooth routes for the energisation of new connections. They also maintain the network equipment and respond to interrupted power supply.
Examples of IDNOs include Vattenfall, which provides new or upgraded grid connections and supports hydrogen projects, and Advanced Electricity Networks (AEN), which maintains a safe and secure network of infrastructure and electricity connections for customers throughout the UK.
You can use the Energy Network Association's search tool to find out if your electricity connection is managed by an IDNO.
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Transmission and Distribution Service Providers (TDSPs)
In the context of electricity distribution, it is essential to understand the difference between transmission networks and distribution networks. Transmission networks facilitate the high-volume, rapid transfer of electricity across vast distances. On the other hand, distribution networks resemble smaller roads that bring electricity directly to your neighbourhood and home. Distribution networks can be further categorised into two types: those managed by regular network operators and those overseen by Independent Distribution Network Operators (IDNOs). IDNOs focus on specific areas, ensuring a smooth electricity flow to particular locations.
To identify your specific electricity distribution network operator (DNO), you can refer to your electricity bill, which contains a 'Distributor ID' or 'MPAN' (Meter Point Administration Number). These unique identifiers help energy companies manage the electricity supplied to your home. Alternatively, you can call a dedicated number or enter your postcode on specific websites to determine your DNO.
In Texas, customers receive monthly bills from their local utility company, which include usage charges and transmission and delivery fees. Each Retail Electric Provider (REP) in Texas handles billing for its customers, resulting in varying bill formats when switching between REPs. Direct Energy, a prominent REP in Texas, provides customers with the option of receiving their bills via mail or email.
Additionally, TDSPs play a role in ensuring uninterrupted service during transitions between retail electricity providers (REPs). They can place a "switch hold" on a service address to address any outstanding balances from previous occupants, ensuring financial obligations are fulfilled before switching providers.
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Local TDUs handle power outages
In the event of a power outage, your local Transmission and Distribution Utility (TDU) – also called a Transmission and Distribution Service Provider (TDSP) – should be your first point of contact. TDUs are responsible for restoring power and can be contacted directly or via your Retail Electric Provider (REP).
REPs are the primary point of contact for customers and handle account setup, billing, and customer service issues. TDUs, on the other hand, have limited direct interaction with consumers, usually reserved for power outages, meter readings, and maintaining and repairing the physical infrastructure.
To find your local TDU, you can refer to your electricity bill, which contains a 'Distributor ID' or 'MPAN' (Meter Point Administration Number) that helps identify your electricity supplier. You can also use an address or postcode search online to find your local TDU or distribution network operator (DNO).
In Texas, some of the major TDUs include Oncor, the largest TDU in the state, serving the Dallas-Fort Worth metropolitan area and its surroundings; CenterPoint, which serves Houston; AEP Texas North and AEP Texas Central, which cover Abilene, Corpus Christi, and the Rio Grande Valley; TNMP, which serves Lewisville and Gulf Coast communities; and LP&L, which serves the Lubbock area.
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Frequently asked questions
If you live in the US, you can find out which electricity distribution network operator (DNO) serves your area by calling 105 for free. You can also enter your postcode on the DNO website to find out.
The REP sells energy plans to homes and businesses, while the TDU delivers that energy to the point of use with power lines and transformers.
A Distributor ID is a number on your electricity bill that can help you find which network operator looks after your connection.
An MPAN (Meter Point Administration Number) is like a unique ID or address for your electricity supply. It helps energy companies keep track of how much electricity you use and ensures that you are billed correctly.










































