What are the common methods to query external IP addresses?

To query your external IP address, you can do it in a variety of ways. In most cases, the external IP address is assigned to the user by the Internet Service Provider (ISP). Here are some common methods to query the external IP address:

1. Use a search engine: You can enter "my external IP address" or "query external IP address" in the search engine, and the search results will usually show your current external IP address

2. Use website services: Some websites provide services for querying external IP addresses. Just visit these websites and they will automatically display your external IP address. For example, you can visit http://ip.cip.cc/ or http://www.ip138.com/ for query.

3. Use command line tools: In Windows, you can open a command prompt window, enter the "ipconfig" command, and then find the "IPv4 address" in the displayed information. This address is your external IP address. In Mac or Linux systems, you can open a terminal window and enter the "curl ifconfig.me" command to obtain the external IP address.

4. Use the router management interface: If you connect to the Internet through a router, you can log in to the router management interface and view the external IP address obtained by the router in the corresponding location.

There are many ways to query the external IP address. You can choose the appropriate method according to your actual situation. Whether it is through a search engine, website service, command line tool or router management interface, you can easily and quickly obtain your external IP address.