---
title: "DISCRETE CODE — aviation glossary — OnlyPlanes"
description: "As used in the Air Traffic Control Radar Beacon System (ATCRBS), any one of the 4096 selectable Mode 3/A aircraft transponder codes except those ending in zero zero; e.g., discrete codes: 0010, 1201, 2317, 7777; nondiscrete codes: 0100, 1200, 7700."
canonical_url: "https://onlyplanes.ru/en/learn/discrete-code"
locale: en
meta:
  keywords: "DISCRETE CODE, DISCRETE CODE"
  "og:description": "As used in the Air Traffic Control Radar Beacon System (ATCRBS), any one of the 4096 selectable Mode 3/A aircraft transponder codes except those ending in zero zero; e.g., discrete codes: 0010, 1201, 2317, 7777; nondiscrete codes: 0100, 1200, 7700."
  "og:image": "https://onlyplanes.ru/images/aviation/aircraft/boeing-787.webp"
  "og:title": "DISCRETE CODE — aviation glossary"
---

> Index of every page on this site: [llms.txt](https://onlyplanes.ru/llms.txt)

Operations

# DISCRETE CODE

TERM · Operations

At a glance

## Meaning of DISCRETE CODE

As used in the Air Traffic Control Radar Beacon System (ATCRBS), any one of the 4096 selectable Mode 3/A aircraft transponder codes except those ending in zero zero; e.g., discrete codes: 0010, 1201, 2317, 7777; nondiscrete codes: 0100, 1200, 7700.

### More about DISCRETE CODE

As used in the Air Traffic Control Radar Beacon System (ATCRBS), any one of the 4096 selectable Mode 3/A aircraft transponder codes except those ending in zero zero; e.g., discrete codes: 0010, 1201, 2317, 7777; nondiscrete codes: 0100, 1200, 7700. Nondiscrete codes are normally reserved for radar facilities that are not equipped with discrete decoding capability and for other purposes such as emergencies (7700), VFR aircraft (1200), etc.

```json
{"@context":"https://schema.org","@type":"DefinedTerm","@id":"https://onlyplanes.ru/en/learn/discrete-code#term","name":"DISCRETE CODE","alternateName":["DISCRETE CODE"],"description":"As used in the Air Traffic Control Radar Beacon System (ATCRBS), any one of the 4096 selectable Mode 3/A aircraft transponder codes except those ending in zero zero; e.g., discrete codes: 0010, 1201, 2317, 7777; nondiscrete codes: 0100, 1200, 7700.","inDefinedTermSet":{"@type":"DefinedTermSet","@id":"https://onlyplanes.ru/en/learn#glossary","name":"OnlyPlanes aviation glossary"},"url":"https://onlyplanes.ru/en/learn/discrete-code"}
```

```json
{"@context":"https://schema.org","@graph":[{"@id":"https://onlyplanes.ru/en#website","@type":"WebSite","description":"News, stories and rare images from the world of aviation","inLanguage":"en-GB","name":"OnlyPlanes","url":"https://onlyplanes.ru/en","publisher":{"@id":"https://onlyplanes.ru/en#identity"},"translationOfWork":{"@id":"https://onlyplanes.ru/en#website"}},{"@id":"https://onlyplanes.ru/en/learn/discrete-code#webpage","@type":"WebPage","description":"As used in the Air Traffic Control Radar Beacon System (ATCRBS), any one of the 4096 selectable Mode 3/A aircraft transponder codes except those ending in zero zero; e.g., discrete codes: 0010, 1201, 2317, 7777; nondiscrete codes: 0100, 1200, 7700.","name":"DISCRETE CODE — aviation glossary","url":"https://onlyplanes.ru/en/learn/discrete-code","isPartOf":{"@id":"https://onlyplanes.ru/en#website"},"potentialAction":[{"@type":"ReadAction","target":["https://onlyplanes.ru/learn/discrete-code"]}],"primaryImageOfPage":{"@id":"https://onlyplanes.ru/en#logo"}},{"@id":"https://onlyplanes.ru/en#identity","@type":"Organization","name":"OnlyPlanes","url":"https://onlyplanes.ru/en","logo":{"@id":"https://onlyplanes.ru/en#logo"},"sameAs":["https://t.me/legkoenebo"]},{"@id":"https://onlyplanes.ru/en#logo","@type":"ImageObject","caption":"OnlyPlanes","contentUrl":"https://onlyplanes.ru/search-logo.png","inLanguage":"en-GB","url":"https://onlyplanes.ru/search-logo.png"}]}
```

## Sitemap

See the full [sitemap](https://onlyplanes.ru/sitemap.md) for all pages.