Why does the travel itinerary code show a city I haven't been to?

Prove that you haven't been to places that can be proved by querying three basic telecom operators: China Telecom, China Mobile and China Unicom.

According to the needs of epidemic prevention and control, with the authorization of users and based on big data analysis, I will provide users with my "epidemic prevention and control itinerary inquiry" service. With the arrival of the peak of returning to work, this service can be used to help prove whether to leave the city or return from other places.

Telecom and Mobile can find the roaming routing information of the owner in the past 15 days, and Unicom can find the roaming routing information in the past 14 days. Enter the last four digits of the ID number according to the reply message, and you can find out the provinces and prefecture-level cities you have been to in the last month. Shanghai Mobile can launch the SMS version as soon as this week.

The epidemic itinerary inquiry is introduced as follows:

The inquiry function is aimed at the mobile phone number registered with the personal ID number. If it's a company mobile phone, it can't be queried without a personal ID number. At the same time, the three major operators said that this service is a public service, and the inquiry information is for reference only, and the possibility of border roaming is not ruled out, which is not the final judgment basis.

Whether it is finally adopted or not needs to be verified by relevant departments. In order to prevent network congestion, the three major operators also stipulate that each user can query 10 for free every day. Enter the mobile phone number and verification code, and you can inquire whether you have reached the area with serious epidemic in the past 14 days.