- https://sr.wikipedia.org/wiki/%D0%9C%D0%BE%D0%B4%D1%83%D0%BB:ISO_3166/data
- https://sr.wikipedia.org/wiki/%D0%9C%D0%BE%D0%B4%D1%83%D0%BB:ISO_3166/data/IN
- https://sr.wikipedia.org/wiki/%D0%93%D0%B5%D1%80%D1%82%D0%BD%D0%B5%D1%80
It doesn't look Special:UnconnectedPages is cached and updated regulary with updateSpecialPages.php, hence its content should be always up to date.
wikiadmin@10.64.32.197(srwiki)> select distinct qc_type from querycache; +-------------------------+ | qc_type | +-------------------------+ | Ancientpages | | BrokenRedirects | | CrossNamespaceLinks | | Deadendpages | | Disambiguations | | Fewestrevisions | | GadgetUsage | | Listredirects | | Lonelypages | | Longpages | | MediaStatistics | | Mostcategories | | Mostimages | | Mostinterwikis | | Mostlinked | | Mostlinkedcategories | | Mostlinkedtemplates | | Mostrevisions | | OrphanedTimedText | | Popularpages | | Shortpages | | Uncategorizedcategories | | Uncategorizedpages | | Uncategorizedtemplates | | Unusedcategories | | Unusedimages | | Unusedtemplates | | Unwatchedpages | | Wantedcategories | | Wantedfiles | | Wantedpages | | Wantedtemplates | | Withoutinterwiki | +-------------------------+ 33 rows in set (0.00 sec)