Abstract: Methods and apparatus, including computer program products, are provided for emergency call support. In one aspect there is provided a method. The method may include a home subscriber server receiving a first message comprising a generated value representing a session transfer number. The session transfer number may relate to a transfer of an emergency session from a first network to a second network. The method may further comprise a home subscriber server updating a user profile with the generated value representing the session transfer number for the emergency session. The user profile may be stored in the home subscriber server. The method may further comprise a home subscriber server sending a second message comprising the generated value representing the session transfer number. Related apparatus, systems, methods, and articles are also described.