libphonenumber/resources/metadata/53/comments.csv

1	Region	Label	Comment
2	CU	SC	www.itu.int/oth/T0202000033/en
3	CU	XML	http://www.itu.int/oth/T0202000033/en
4	CU	XML_FIXED_LINE	Based on one of the data sources, 80[25] and 878 ranges are fixed-line as per\nGovernment docs, though no other references are found.