Although it is technically possible to find a specific person by following the IP address on the Internet, it is actually difficult to operate and requires a combination of technical means.
For Jiakuan users, the IP address they use is dynamically assigned, and they may get a different IP address every time they connect to the network. Carriers usually do not directly associate the user's real geolocation information with the IP address. Therefore, it is difficult to accurately locate a specific home address with only a dynamic IP address.
If an attacker obtains the user's real IP address through some means and has certain technical capabilities, they may take some technical methods to try to find the user's specific location. A common approach is to take advantage of the mapping of IP addresses to geolocation. Some public IP address lookup tools can help attackers obtain approximate geographic location information based on IP addresses. For example, you can query the Internet Service Provider (ISP) information corresponding to an IP address to determine the region where a user is located. Combined with other publicly available network data or the use of some social workers, the attacker may be able to further narrow down the scope and locate a specific home address.
Another way is to utilize network scanning technology. An attacker can use a scanning tool to scan a target IP address and probe the ports and services running on the address. If an attacker discovers an open port or a specific service, they may further use this information to gain more information about the user's network environment and thus speculate about where the user might live.
For a fixed IP address of an Internet Express Connect user, the IP address is fixed and associated with the user. This means that once this IP address is known, it is possible to know the location of this user. The operator records the assignment of a fixed IP address, including the region where the user is located. Therefore, it is theoretically possible to find the user's home address by querying the operator's records, combining it with other publicly available network data, or using some social work methods.
In fact, it is still difficult to operate. First of all, the assignment information of fixed IP addresses is usually tightly protected and difficult for unauthorized persons to obtain. Second, even if you know the general area information, you need more personal information and online behavior data to further locate the specific home address. This data is usually protected by law, and access to it without legal means would be illegal.
Technically, it is difficult but also possible to find a specific person by following the IP address on the Internet. This requires a combination of technical means and involves both personal privacy and legal issues. As a result, in practice, few people are able to accurately find someone's home address by IP address.