All country codes and names retrieve from: http://countrycode.org/ and written in plist. For parsing HTML I'm using this: https://github.com/topfunky/hpple

gistfile1.m

    NSURL *url = [NSURL URLWithString:@"http://countrycode.org/"];
    
    NSData  * data      = [NSData dataWithContentsOfURL:url];
    
    TFHpple * doc       = [[TFHpple alloc] initWithHTMLData:data];
    
    NSArray *ar = [doc searchWithXPathQuery:@"/html/body/div/div[2]/div/div[2]/table/tbody"];
    TFHppleElement *element = [ar objectAtIndex:0];
    
    NSArray *children = [element children];
    
    NSMutableDictionary *countryCodes = [[NSMutableDictionary alloc] init];
    
    for (TFHppleElement *el in children) {
        for (TFHppleElement *elm in [el children]) {
            TFHppleElement *countryElement = [[[[el children] objectAtIndex:0] children] objectAtIndex:1];
            TFHppleElement *codeElement = [[el children] objectAtIndex:4];
            NSString *code = [[codeElement text] stringByReplacingOccurrencesOfString:@"\u00a0" withString:@""];
            NSString *codeNW = [code stringByReplacingOccurrencesOfString:@" " withString:@""];
            NSString *codePlus = [NSString stringWithFormat:@"+%@", codeNW];
            [countryCodes setObject:codePlus forKey:[countryElement text]];
        }
    }
    
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *path = [documentsDirectory stringByAppendingPathComponent:@"Countries.plist"];
    
    // write plist to disk
    [countryCodes writeToFile:path atomically:YES];

you could have used countrycode api's:
https://countrycode.org/api/countryCode/countryMenu

ayox can you tell me where can i find the countrycode api's list?

@somasekar try this one https://restcountries.eu/