note:

International phone number for Croatia is 385. For all mentioned phone numbers above, you must use prefix 021 unless it's not mentioned otherwise, and you are out of County Splitsko-dalmatinska.

example:

++385 21 xxx-xxx 021 xxx-xxx xxx-xxx

If you are outside of Republic of Croatia.   If you are outside of County Splitsko-dalmatinska   If you are in County Splitsko-dalmatinska