sensors Mode-S transponder

4866DE

ICAO 24-bit transponder address · allocated to Netherlands

Currently assigned to PH-YHY · AIRBUS A-321neo

Hex
4866DE
Octal
22063336
Decimal
4,744,926
Country
NL
Tail
PH-YHY
Type
A21N
No current signal · last broadcast 13h ago
Flights observed
6
Distinct callsigns
5
Country
NL
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 4866DE.

Country allocation

The ICAO 24-bit address 4866DE falls within the block assigned to Netherlands (NL) by ICAO Annex 10, Volume III. Every aircraft registered in Netherlands receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 5 distinct

Callsign Airline Flights Last seen
TRA60J Transavia Holland 2 2026-04-14
TRA71J - 1 2026-04-12
TRA68C - 1 2026-04-13
TRA16M - 1 2026-04-14
TRA11T Transavia Holland 1 2026-04-13

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-14 TRA16M - Apr 14, 09:35 UTCApr 14, 11:05 UTC1h 30m
2026-04-14 TRA60J AMS → AGP Apr 14, 07:10 UTCApr 14, 07:20 UTC10m
2026-04-14 TRA60J AMS → AGP Apr 14, 05:15 UTCApr 14, 07:10 UTC1h 55m
2026-04-13 TRA68C OPO → AMS Apr 13, 20:10 UTCApr 13, 22:40 UTC2h 30m
2026-04-13 TRA11T INN → AMS Apr 13, 16:50 UTCApr 13, 19:05 UTC2h 15m
2026-04-12 TRA71J - Apr 12, 17:15 UTCApr 12, 18:40 UTC1h 25m

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 PH-YHY page for operator, model, and routing details .

Mode-S 4866DE frequently asked

What is Mode-S code 4866DE?
4866DE is an ICAO 24-bit transponder address. Allocated to Netherlands. Assigned to PH-YHY.
Where is Mode-S 4866DE registered?
Mode-S code 4866DE is allocated to Netherlands (NL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4866DE broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4866DE, octal 22063336, decimal 4,744,926.
What flights does 4866DE operate?
Mode-S 4866DE has broadcast 5 distinct callsigns, including TRA60J, TRA71J, TRA68C, TRA16M, TRA11T.