---
title: "Allowed ASCII Special Characters"
slug: "allowed-ascii-special-characters"
updated: 2026-05-21T14:20:13Z
published: 2026-05-21T14:20:13Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nasuni.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Allowed ASCII Special Characters

In addition to upper-case ASCII letters (A-Z), lower-case ASCII letters (a-z), and ASCII numerals (0-9), these ASCII special characters are allowed for purposes such as:

- Encryption key passphrase.
- Escrow passphrase.

| **ASCII symbol number (decimal)** | **ASCII symbol** | **Description of symbol** |
| --- | --- | --- |
| 33 | ! | Exclamation mark |
| 34 | " | Quotation mark / Quotes |
| 35 | # | Number sign / Hash / Pound |
| 36 | $ | Dollar sign |
| 37 | % | Percent sign |
| 38 | & | Ampersand |
| 39 | ' | Apostrophe / Single quote |
| 40 | ( | Left parenthesis |
| 41 | ) | Right parenthesis |
| 42 | * | Asterisk |
| 43 | + | Plus sign |
| 44 | , | Comma |
| 45 | - | Hyphen / Minus sign |
| 46 | . | Period / Dot |
| 47 | / | Slash / Forward slash |
| 58 | : | Colon |
| 59 | ; | Semicolon |
| 60 | < | Less-than sign |
| 61 | = | Equals sign |
| 62 | > | Greater-than sign |
| 63 | ? | Question mark |
| 64 | @ | At sign |
| 91 | [ | Left square bracket |
| 92 | \ | Backslash |
| 93 | ] | Right square bracket |
| 94 | ^ | Caret / Circumflex |
| 95 | _ | Underscore |
| 96 | ` | Grave accent (not apostrophe or single quote) |
| 123 | { | Left curly brace |
| 124 | \| | Vertical bar / Pipe |
| 125 | } | Right curly brace |
| 126 | ~ | Tilde |