The invention discloses a method for acquiring a real called number in mobile network calling, and provides a solution scheme of C / D port parallel connection and Nc port serial connection. The methodcomprises the following steps: introducing a
MAP protocol analytic
processing mechanism, resolving a MSRN / TLDN number
application procedure, and dynamically acquiring a mapping relation between a
MSISDN / MDN number and a MSRN / TLDN number for the use of the calling
processing. The method disclosed by the invention has the advantages that a C / D port traffic parallel connection and the Nc port serialconnection combined
processing way is used for realizing the real-time dynamic acquisition of the MSRN / TLDN number and the
MSISDN / MDN number; the processing can be performed according to the real called number
MSISDN / MDN when the Nc port signaling is resolved from the function, the obvious
operability and practical significance are provided; the C / D port traffic in parallel connection way is freefrom any influenced on the C / D port service from the affection influence, and the influence on the existing network is reduced to the lowest.