Methods, systems, and computer readable media for identifying roaming messages

A system for identifying roaming messages at network functions in a home public land mobile network (PLMN), the system comprising:

• a home security edge protection proxy (SEPP) for the home PLMN, wherein the home SEPP is configured for:
• receiving a request message from a consumer network function in a visitor PLMN;
• and
• adding a header to the request message indicating that the request message originated in the visitor PLMN;
• a producer network function in the home PLMN, wherein the producer network function is configured for:
• receiving the request message;
• determining that the request message originated in the visitor PLMN by finding the header indicating that the request message originated in the visitor PLMN;
• and
• applying a roaming-specific policy while processing the request message in response to determining that the request message originated in the visitor PLMN.

One or more non-transitory computer readable media having stored thereon executable instructions that when executed by at least one processor of a computer cause the computer to perform steps comprising:

• receiving, at a home security edge protection proxy (SEPP) for a home public land mobile network (PLMN), a request message from a consumer network function in a visitor PLMN;
• adding, at the home SEPP, a header to the request message indicating that the request message originated in the visitor PLMN;
• receiving, at a producer network function in the home PLMN, the request message;
• determining, at the producer network function in the home PLMN, that the request message originated in the visitor PLMN by finding the header indicating that the request message originated in the visitor PLMN;
• and
• applying, at the producer network function in the home PLMN, a roaming-specific policy while processing the request message in response to determining that the request message originated in the visitor PLMN.