Decoder: GTP-U

GTP-U Hex Decoder

GPRS Tunneling Protocol User Plane (GTP-U) transports user traffic between 5G/LTE network functions over UDP. Decoding TEID and message type helps map packets to user-plane tunnels.

Decode GTP-U Data

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Raw Decode Output

Decoded Fields

Payload Hex: N/A

Payload ASCII: N/A

N/A

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About GTP-U

GTP-U encapsulates user data in mobile core networks and identifies tunnels with TEID values. Header flags indicate optional sequence and extension header presence.

GPRS Tunneling Protocol User Plane (GTP-U) transports user traffic between 5G/LTE network functions over UDP. Decoding TEID and message type helps map packets to user-plane tunnels.

GTP-U Header Structure

  • Flags byte: version, protocol type, and optional-field indicators.
  • Message Type (1 byte): packet category such as G-PDU or control signals.
  • Length (2 bytes): payload size after mandatory header.
  • TEID (4 bytes): tunnel endpoint identifier.
  • Optional Sequence/N-PDU/Extension fields when indicated by flags.

Why Decode GTP-U Packets

Decode GTP-U tunnel headers from hex including flags, message type, length, and TEID.