libphonenumber/resources/metadata/51/comments.csv

1	Region	Label	Comment
2	PE	SC	http://www.itu.int/oth/T02020000A6/en
3	PE	SC	http://en.wikipedia.org/wiki/+51
4	PE	XML	http://www.itu.int/oth/T02020000A6/en
5	PE	XML	http://en.wikipedia.org/wiki/+51
6	PE	XML	http://www.assistbook.com/South%20America/Peru/widecodes
7	PE	XML_FIXED_LINE	Looks like not all 1X numbers are land-line numbers in Lima, some of them are allotted\nas IDDs. As it effects parsing of these numbers and no valid numbers found online, not\nsupporting 8 digit 191[124], 1977 and 1990 ranges.