---
id: "ascii"
kind: "glossary-term"
title: "ASCII"
language: "en"
category: "DNS and technical foundations"
updated: "2026-10-04T14:01:23Z"
canonical: "https://tldlog.com/glossary/ascii/"
translations:
  es: "https://tldlog.com/es/glosario/ascii/"
  de: "https://tldlog.com/de/glossar/ascii/"
  fr: "https://tldlog.com/fr/glossaire/ascii/"
  it: "https://tldlog.com/it/glossario/ascii/"
  pt-BR: "https://tldlog.com/pt/glossario/ascii/"
  ru: "https://tldlog.com/ru/glossariy/ascii/"
  zh-Hans: "https://tldlog.com/zh/cihui/ascii/"
---

# ASCII

American Standard Code for Information Interchange

A basic set of English letters, digits and symbols, each with its own number, that early computer systems and the DNS were built on. That is why domain names in other scripts or with accents are converted into an ASCII form, starting with xn--, to work in the DNS.

## related terms

- [IDN](https://tldlog.com/glossary/idn/)
- [Punycode](https://tldlog.com/glossary/punycode/)
- [A-label](https://tldlog.com/glossary/a-label/)
- [LDH](https://tldlog.com/glossary/ldh/)
- [U-label](https://tldlog.com/glossary/u-label/)