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TCP Sequence Number Wrap Calculator

Use this online tcp sequence number wrap calculator with pasted values. Count SYN and FIN as one sequence number yourself; this is modular arithmetic, not a TCP stream analyzer.

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  1. 01

    Add your input

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  2. 02

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  3. 03

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tcp sequence number calculator online

Use tcp sequence number wrap calculator online to work with your own network values. Count SYN and FIN as one sequence number yourself; this is modular arithmetic, not a TCP stream analyzer.

How to use it

Enter Starting sequence number (uint32). Set Sequence-space increment (bytes). Select Calculate, check the result units, then copy or download the JSON result.

Options and example settings

OptionChoices / valueExample default
Starting sequence number (uint32)Main input. Whole number. Zero or positive values. Maximum 4294967295.4294967290
Sequence-space increment (bytes)Option. Whole number. Zero or positive values. Maximum 4294967295.20

Calculation method

next sequence = (sequence + increment) mod 2³²

Worked examples

Worked case for tcp sequence number wrap calculator. Count SYN and FIN as one sequence number yourself; this is modular arithmetic, not a TCP stream analyzer.

TCP Sequence Number Wrap Calculator — example with explicit inputs

Settings: Sequence-space increment (bytes): 20

Input:

4294967290

Expected result for the example input and options:

Output:

{
  "next_sequence": 14
}

Limitations and common mistakes

  • Count SYN and FIN as one sequence number yourself; this is modular arithmetic, not a TCP stream analyzer.
  • Match every input to its displayed unit; scientific notation such as 1e-6 is accepted.

Frequently asked questions

How can I use tcp sequence number calculator online?

Enter Starting sequence number (uint32). Set Sequence-space increment (bytes). Select Calculate, check the result units, then copy or download the JSON result.

Which model does TCP Sequence Number Wrap Calculator use?

next sequence = (sequence + increment) mod 2³². Count SYN and FIN as one sequence number yourself; this is modular arithmetic, not a TCP stream analyzer.

Technical references

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.

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