[Whether or not]Locate a country with only lac & cid?


#1

If i dont have mcc and msc, can i loacate a certain country only with lac&cid?
I’m not sure whether different country could have the same lac and cid.
Thanks!


#2

Hey Hannah

There are 4 basic parts of a cell identifier: MCC-MNC-LAC-CID

This ensures that no two cells have the same cellular identifier.

For the last 2 parts:
LAC -

  • This is decided by a telecom firm based on its own logic. Some telecom firms decide on LAC by region, others by a cluster. If a large amount of CID’s belonging to a particular telecom firm are in a particular area, all these will likely have the same LAC. This helps telecom firms organize information.

CID -

  • This is a unique id assigned to a physical cell unit.

To answer your question - yes, different countries can have cells that have the same LAC/CID. AT&T does not inform Vodafone that it’s keeping x as LAC/CID, so, it is possible that both have the same LAC/CID in different regions.

In the big picture, this does not matter as the entire identifier (MCC-MNC-LAC-CID) is always unique.


#3

You can download the OpenCelliD database from here and select the LAC/CID’s that you want. I believe this is the fastest way for you to find what you’re looking for.

A guide to extract cells you want can be found here.


#4

Thank you very much! I’m now fully understand that.


#5

Okay, thanks a lot! And one more question, does the database of cell towers is the total one?


#6

The database has over 36 million cells as of 5th Feb 2018. It contains all the cells (worldwide) contributed by the community.


#7

Okay, I see. Once again, thank you very much, sagar~~