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TCP 3386

ProtocolTCP
Port3386
LabelsGTP 3GPP GSM/UMTS CDR logging protocol

Synopsis

  • TCP port 3386 is used by GTP' (GTP prime), the 3GPP Charging Data Transfer protocol.
  • In mobile core networks (2G/3G/4G/5G), elements like SGSN/GGSN/SGW/PGW send charging records to a Charging Gateway Function (CGF) over GTP' on port 3386, which can run over TCP or UDP.
  • Real-world products supporting GTP' on 3386/tcp include Ericsson Charging Gateway, Nokia (Alcatel‑Lucent) Charging Gateway, Huawei CGF, ZTE CGF, and Cisco ASR/StarOS GGSN/PGW.
  • Billing/mediation platforms (e.g., Amdocs or Oracle Communications BRM via CGF interfaces) commonly receive GTP' on 3386 from network elements.
  • Although many deployments use UDP/3386, TCP/3386 is widely implemented for reliable transport of charging data.

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