I think it is the port no# 5130, but I am not sure.
You can try the following from a CICS Terminal
CEMT I TCPIPSERV(*) URM(ADN*)
CICS will answer something like this
Tcpips(ADNRREST) Clo Por(05130) Http Nos Tra(CWXN)
Con(00000) Bac( 00001 ) Maxd( 524288 ) Urm( ADNANAL )
Inside brackets beside Por notice that is the port number, in this example 05130.
SystemAdmin