Mode-S AF8420 · Transponder Hex for 22-1007

Q: What is Mode-S code AF8420?

AF8420 is an ICAO 24-bit transponder address. Assigned to 22-1007 .

Last known position

Most recent position reported by Mode-S AF8420.

Callsign history 2 distinct

Callsign	Airline	Flights	Last seen
TROY709	-	2	2026-07-14
GUMP12	-	2	2026-06-26

Recent flights last 4

Date	Flight	Route	Takeoff	Landing	Duration
2026-07-14	TROY709	-	Jul 14, 21:40 UTC	Jul 14, 22:10 UTC	30m
2026-07-14	TROY709	-	Jul 14, 13:30 UTC	Jul 14, 13:45 UTC	15m
2026-06-26	GUMP12	-	Jun 26, 18:15 UTC	Jun 26, 18:24 UTC	10m
2026-06-26	GUMP12	-	Jun 26, 15:45 UTC	Jun 26, 16:00 UTC	15m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the 22-1007 page for operator, model, and routing details .

Mode-S AF8420 frequently asked

What is Mode-S code AF8420?

AF8420 is an ICAO 24-bit transponder address. Assigned to 22-1007.

Is AF8420 broadcasting right now?

No active broadcast right now. Last signal was 19h ago.

Hex, octal, and decimal Mode-S codes: what's the difference?

The same 24-bit identifier expressed in different bases: hex AF8420, octal 53702040, decimal 11,502,624.

What flights does AF8420 operate?

Mode-S AF8420 has broadcast 2 distinct callsigns, including TROY709, GUMP12.