An IP short message gateway (IP-SM-GW) utilizes multiple addresses for delivering short messages between an IP network and a cellular network. The IP short message gateway can have multiple SCCP addresses that correspond to categories of origin/destination IP addresses of short messages. In response to a request to deliver a short message between an IP network and a cellular network, the IP short message gateway identifies an IP address associated with the origin/destination of the short message. The IP short message gateway then identifies at least one of its multiple SCCP addresses based on the identified IP address. The IP short message gateway can generate a response message that includes the identified SCCP address. The identified SCCP address in the response message will be available to SMSC or IMS. SMSC or IMS can implement differentiated handling of short messages based on SCCP addresses received from the IP short message gateway.