OID value: 220.127.116.11.4.1.1418.104.22.168.50
Values in this syntax are encoded as if they were Printable String types. Telephone numbers are recommended in X.520 to be in international form, as described in E.123 .
( 22.214.171.124.4.1.14126.96.36.199.50 DESC 'Telephone Number' )
URL for further info: http://src.doc.ic.ac.uk/computing/internet/rfc/rfc2252.txt
See also the OID Repository website reference for 188.8.131.52.4.1.14184.108.40.206.50