Apparatus

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sensors Mode-S transponder

471A81

ICAO 24-bit transponder address · allocated to Hungary

Currently assigned to HA-KAZ · ATR-72-600

Hex
471A81
Octal
21615201
Decimal
4,659,841
Country
HU
Tail
HA-KAZ
Type
AT76
No current signal · last broadcast 4h ago
Flights observed
131
Distinct callsigns
10
Country
HU
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 471A81.

Country allocation

The ICAO 24-bit address 471A81 falls within the block assigned to Hungary (HU) by ICAO Annex 10, Volume III. Every aircraft registered in Hungary 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 10 distinct

Callsign Airline Flights Last seen
FRF6262 - 35 2026-07-17
FRF6261 - 35 2026-07-17
FRF4908 - 23 2026-05-20
FRF4907 - 21 2026-05-20
FRF4913 - 6 2026-05-15
FRF4910 - 5 2026-05-18
FRF760P - 3 2026-05-21
FRF750 - 1 2026-05-14
FRF6907 - 1 2026-04-20
FRF120 - 1 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 FRF6261 - Jul 17, 21:00 UTCJul 17, 22:10 UTC1h 10m
2026-07-17 FRF6262 CGN → BSL Jul 17, 02:15 UTCJul 17, 03:14 UTC1h 0m
2026-07-16 FRF6261 - Jul 16, 20:39 UTCJul 16, 21:45 UTC1h 5m
2026-07-16 FRF6262 - Jul 16, 02:35 UTCJul 16, 03:35 UTC1h 0m
2026-07-15 FRF6261 - Jul 15, 21:00 UTCJul 15, 22:10 UTC1h 10m
2026-07-15 FRF6262 - Jul 15, 02:20 UTCJul 15, 03:25 UTC1h 5m
2026-07-14 FRF6261 - Jul 14, 20:50 UTCJul 14, 21:55 UTC1h 5m
2026-07-14 FRF6262 - Jul 14, 02:35 UTCJul 14, 03:30 UTC55m
2026-07-13 FRF6261 - Jul 13, 20:45 UTCJul 13, 21:55 UTC1h 10m
2026-07-13 FRF6262 CGN → BSL Jul 13, 02:01 UTCJul 13, 03:01 UTC1h 0m
2026-07-12 FRF6261 - Jul 12, 08:20 UTCJul 12, 09:30 UTC1h 10m
2026-07-10 FRF6262 - Jul 10, 02:25 UTCJul 10, 03:20 UTC55m
2026-07-09 FRF6261 BSL → CGN Jul 9, 20:45 UTCJul 9, 21:50 UTC1h 5m
2026-07-09 FRF6262 CGN → BSL Jul 9, 02:45 UTCJul 9, 03:40 UTC55m
2026-07-08 FRF6261 BSL → CGN Jul 8, 20:55 UTCJul 8, 22:05 UTC1h 10m
2026-07-08 FRF6262 - Jul 8, 02:40 UTCJul 8, 03:30 UTC50m
2026-07-07 FRF6261 - Jul 7, 21:00 UTCJul 7, 22:10 UTC1h 10m
2026-07-07 FRF6262 CGN → BSL Jul 7, 02:15 UTCJul 7, 03:05 UTC50m
2026-07-06 FRF6261 - Jul 6, 20:45 UTCJul 6, 22:00 UTC1h 15m
2026-07-06 FRF6262 - Jul 6, 02:10 UTCJul 6, 03:05 UTC55m
2026-07-03 FRF6261 - Jul 3, 20:50 UTCJul 3, 22:10 UTC1h 20m
2026-07-03 FRF6262 - Jul 3, 02:50 UTCJul 3, 03:40 UTC50m
2026-07-02 FRF6261 BSL → CGN Jul 2, 20:45 UTCJul 2, 21:50 UTC1h 5m
2026-07-02 FRF6262 - Jul 2, 02:25 UTCJul 2, 03:20 UTC55m
2026-07-01 FRF6261 BSL → CGN Jul 1, 21:15 UTCJul 1, 22:25 UTC1h 10m
2026-07-01 FRF6262 - Jul 1, 04:55 UTCJul 1, 05:55 UTC1h 0m
2026-06-30 FRF6261 BSL → CGN Jun 30, 20:50 UTCJun 30, 21:55 UTC1h 5m
2026-06-30 FRF6262 - Jun 30, 02:20 UTCJun 30, 03:15 UTC55m
2026-06-29 FRF6261 - Jun 29, 21:09 UTCJun 29, 22:05 UTC55m
2026-06-29 FRF6262 CGN → BSL Jun 29, 02:09 UTCJun 29, 03:29 UTC1h 20m
2026-06-26 FRF6261 - Jun 26, 20:55 UTCJun 26, 22:05 UTC1h 10m
2026-06-26 FRF6262 - Jun 26, 02:09 UTCJun 26, 03:15 UTC1h 5m
2026-06-25 FRF6261 - Jun 25, 20:45 UTCJun 25, 21:50 UTC1h 5m
2026-06-25 FRF6262 CGN → BSL Jun 25, 02:19 UTCJun 25, 03:20 UTC1h 0m
2026-06-24 FRF6261 - Jun 24, 20:54 UTCJun 24, 22:00 UTC1h 5m
2026-06-24 FRF6262 - Jun 24, 02:20 UTCJun 24, 03:24 UTC1h 5m
2026-06-23 FRF6261 BSL → CGN Jun 23, 20:49 UTCJun 23, 22:05 UTC1h 15m
2026-06-23 FRF6262 - Jun 23, 02:49 UTCJun 23, 03:54 UTC1h 5m
2026-06-22 FRF6261 - Jun 22, 20:49 UTCJun 22, 22:05 UTC1h 15m
2026-06-22 FRF6262 - Jun 22, 02:04 UTCJun 22, 02:59 UTC55m
2026-06-19 FRF6261 - Jun 19, 21:04 UTCJun 19, 22:34 UTC1h 30m
2026-06-19 FRF6262 CGN → BSL Jun 19, 02:19 UTCJun 19, 03:20 UTC1h 0m
2026-06-18 FRF6261 BSL → CGN Jun 18, 20:50 UTCJun 18, 22:00 UTC1h 10m
2026-06-18 FRF6262 - Jun 18, 02:10 UTCJun 18, 03:05 UTC55m
2026-06-17 FRF6261 BSL → CGN Jun 17, 20:55 UTCJun 17, 22:05 UTC1h 10m
2026-06-17 FRF6262 CGN → BSL Jun 17, 02:15 UTCJun 17, 03:15 UTC1h 0m
2026-06-16 FRF6261 - Jun 16, 20:45 UTCJun 16, 22:00 UTC1h 15m
2026-06-16 FRF6262 CGN → BSL Jun 16, 02:15 UTCJun 16, 03:15 UTC1h 0m
2026-06-15 FRF6261 - Jun 15, 20:54 UTCJun 15, 22:10 UTC1h 15m
2026-06-15 FRF6262 - Jun 15, 02:10 UTCJun 15, 03:10 UTC1h 0m

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 HA-KAZ page for operator, model, and routing details .

Mode-S 471A81 frequently asked

What is Mode-S code 471A81?
471A81 is an ICAO 24-bit transponder address. Allocated to Hungary. Assigned to HA-KAZ.
Where is Mode-S 471A81 registered?
Mode-S code 471A81 is allocated to Hungary (HU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 471A81 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 471A81, octal 21615201, decimal 4,659,841.
What flights does 471A81 operate?
Mode-S 471A81 has broadcast 10 distinct callsigns, including FRF6262, FRF6261, FRF4908, FRF4907, FRF4913.