libphonenumber/resources/metadata/381/comments.csv

1	Region	Label	Comment
2	RS	XML	http://www.itu.int/oth/T02020000B9/en
3	RS	XML	http://registar.ratel.rs/en/reg202
4	RS	XML_FIXED_LINE	Most subscriber numbers may not start with 0 or 1. Exceptionally, the prefix 11 1[5-7]\nhas been issused, so we allow 11 1X here.