ASCII code for acknowledge
6
Acknowledge — a control character, not printable
| Decimal | 6 |
| Hexadecimal | 0x06 |
| Octal | 0006 |
| Binary | 00000110 |
| HTML entity |  |
What it is
A positive reply — the message arrived intact. The name lives on in networking, where a TCP ACK does the same job with a different encoding.
The full entry
ASCII 6 in full — the code point page, with what sits either side of it and how the character is encoded elsewhere.
Frequently asked questions
What is the ASCII code for acknowledge?
The ASCII code for acknowledge is 6 in decimal, 0x06 in hexadecimal and 0006 in octal.
What is acknowledge in binary?
00000110 — eight bits, though ASCII only defines seven, so the top bit is always zero.
Is acknowledge a printable character?
No. Acknowledge is a control character — an instruction to a teleprinter rather than a mark on paper, which is why most tables show an empty cell for it.
Other characters
- ASCII code for bell — 7
- ASCII code for backspace — 8
- ASCII code for tab — 9
- ASCII code for newline — 10
- ASCII code for vertical tab — 11
- ASCII code for form feed — 12
- ASCII code for carriage return — 13
- ASCII code for shift out — 14
- ASCII code for shift in — 15
- ASCII code for data link escape — 16
- ASCII code for device control 1 (xon) — 17
- ASCII code for device control 2 — 18
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