Common Short Codes beginning with a leading '4' are reserved for private use by wireless network operators.
Four-digit Common Short Codes are not permitted due to handset incompatibilities.
All 4 digit short codes that start with "118" or 5 digit short codes that start with "1184" are designated to information service providers.
In Lithuania short codes also have no fixed length, starting from three digits up to five.
Messages sent to/from these short codes are known as Premium Rate SMS.