This branch has been depreciated in favor of the joint ISO/CCITT arc 2.16; see this for more information.
The maintenance agency for ISO 3166, which hands out the numeric codes under this arc, is
ISO 3166 Maintenance Agency DIN Burggrafenstrasse 6 D-1000 Berlin 30 phone: +49 30 26010 Fax: +49 30 2601231The same number space is used for IDIs in NSAP addresses (if you don't grok this, don't worry); some registration authorities are listed under http://www.fei.org.uk/fei/dcc-nsap.htm.
The numeric codes assigned are not published on the Web by the maintenance agency, but are published in numerous places on the Web including a Berlin university.
See also the OID Repository website reference for 1.2