Is the license correct?

[mrdvt92]

Based on the statement

"List of MCC and MNC codes from up-to-date Wikipedia page Source: https://en.wikipedia.org/wiki/Mobile_country_code

This indicates that the file mcc-mnc-list.json should be licensed under the terms of the Creative Commons Attribution-ShareAlike License. "under the same, similar or a compatible license"

From the Wikipedia page "Text is available under the Creative Commons Attribution-ShareAlike License;"

The other files in the repository can be under the MIT license. But, the data file itself must be released under a license compatible with the CCA-SA license. As far as I know the MIT license is not compatible with the CCA-SA license since the CCA-SA requires attribution but the MIT license does not.

I suggests that you update the LICENSE file to be 1) CCA-SA or if you really want to keep the other files as MIT then a dual LICENSE where the .js and other files are MIT and the data file is CCA-SA.

[mrdvt92]

OK. So, I found the official source from the ITU. The official MCC/MNC list is from https://www.itu.int/dms_pub/itu-t/opb/sp/T-SP-E.212B-2018-PDF-E.pdf with semimonthly updates from Operational Bulletins from https://www.itu.int/pub/T-SP.

This is is government data and has a price of "free" so I would assume that the list is in the public domain without restriction of distribution.

To update the data it requires a form to be filed with the ITU https://www.itu.int/en/ITU-T/inr/forms/Pages/mnc.aspx.