## Product Introduction
 
**Online IPv4 Range Expander** is a powerful and easy-to-use network tool designed for users who need to calculate and expand IPv4 network ranges. Whether you are a network administrator, IT professional, student, or anyone who needs to handle IP address ranges, this tool will meet your needs. It can accurately calculate the IPv4 network range; simply enter the start and end addresses to quickly obtain the start address, end address, address range, and CIDR (Classless Inter-Domain Routing) notation. With our Online IPv4 Range Expander, you can quickly and accurately complete various IP address range calculation tasks, enhancing work and study efficiency.
 
## Operation Guide
 
1. **Access the Tool Page**:
   Open your browser and visit our Online IPv4 Range Expander page.
 
2. **Enter Start Address**:
   Enter the start address of the IPv4 network range you want to calculate in the input box.
 
3. **Enter End Address**:
   Enter the end address of the IPv4 network range you want to calculate in another input box.
 
4. **Automatic Calculation**:
   The tool will automatically perform the calculation and convert the entered start and end addresses into the corresponding start address, end address, address range, and CIDR notation.
 
5. **View Results**:
   The result box will display the calculated start address, end address, address range, and CIDR notation, which you can copy for further use.
 
Our Online IPv4 Range Expander is not only simple to operate but also efficient and accurate, ensuring that you get the most precise results in the shortest amount of time. Whether for daily study or professional work, it is an indispensable helper. Experience our Online IPv4 Range Expander now and feel the convenience and efficiency of IP address range calculation!