I am looking for a way to deduce/estimate the Mobile Country Code (MCC) and Mobile Network Code (MNC) associated with an IP address.

From an IP address, I am able to find the associated Country and Autonomous System Number (ASN) along with the organization/carrier.

My next step is to find the associated MCC and MNC value if the IP address is for mobile usage.

The page mcc-mnc.com seems to contain up-to-date MCC and MNC values. However, I cannot find how to associate them with an IP address. Especially, for the same MCC and thus organization, multiple MNC values are possible.

How are MNC assigned to IPs? is there a public registry?

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