Decoder: SIP

SIP Hex Decoder

Session Initiation Protocol (SIP) is used for VoIP and real-time session signaling to set up, modify, and terminate multimedia calls.

Decode SIP Data

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Raw Decode Output

Decoded Fields

Payload Hex: N/A

Payload ASCII: N/A

N/A

Additional Insights

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No decoded fields yet. Decode a full frame to see Ethernet/IP/TCP details.

About SIP

SIP is a text-based signaling protocol that uses request/response exchanges similar to HTTP. Decoding raw SIP bytes helps inspect call setup flows like INVITE, REGISTER, BYE, and response codes.

Session Initiation Protocol (SIP) is used for VoIP and real-time session signaling to set up, modify, and terminate multimedia calls.

SIP Header Structure

  • Start line: request line (method URI SIP/version) or status line (SIP/version status reason).
  • Header fields: routing, identity, dialog, and transaction metadata (Via, From, To, Call-ID, CSeq).
  • Blank line separator: boundary between headers and optional message body.
  • Optional body: session description (SDP) or other payload negotiated by Content-Type.

Why Decode SIP Packets

Decode SIP request and response messages from hex including start line, headers, and body preview.