A list of International Dialing Codes Based off Wikipedia Data
Since I couldn't find a pre-made list which was to my satisfaction. I pulled data from this wikipedia article https://en.wikipedia.org/wiki/List_of_country_calling_codes.
As the above article doesn't have the Alpha 2 Code such as 'IN' for India in it. I pulled that data from this wikipedia article https://en.wikipedia.org/wiki/List_of_ISO_3166_country_codes. which has the data. I did a levenshtein match to merge the two as the country names didn't match excatly. I have tried to fix the edge case innacuracies from the levenshthien match. There could still be few inaccuracies in the data, though I am confident it's fully accurate. If you find any do let me know.
The final resulting data omits dialing codes that are not part of a nation and are rather of satellite services or something else