Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4246B9

ICAO 24-bit transponder address · allocated to United Kingdom

Hex
4246B9
Octal
20443271
Decimal
4,343,481
Country
GB
No current signal · last broadcast 21d ago
Flights observed
78
Distinct callsigns
20
Country
GB
Last broadcast
21d ago

Last known position

Most recent position reported by Mode-S 4246B9.

Country allocation

The ICAO 24-bit address 4246B9 falls within the block assigned to United Kingdom (GB) by ICAO Annex 10, Volume III. Every aircraft registered in United Kingdom 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 20 distinct

Callsign Airline Flights Last seen
AHY035 Azerbaijan Airlines 17 2026-07-25
AHY109 Azerbaijan Airlines 8 2026-07-24
AHY023 - 6 2026-07-11
AHY024 - 5 2026-07-12
AHY077 - 4 2026-07-21
AHY036 Azerbaijan Airlines 4 2026-07-26
AHY8226 - 3 2026-07-12
AHY078 Azerbaijan Airlines 3 2026-07-21
AHY8238 - 2 2026-07-12
AHY8237 - 2 2026-07-08
AHY8105 - 2 2026-07-11
AHY071 Azerbaijan Airlines 2 2026-07-20
AHY8225 - 1 2026-07-09
AHY8224 - 1 2026-07-08
AHY8223 - 1 2026-07-08
AHY8042 - 1 2026-07-03
AHY8041 - 1 2026-07-03
AHY3012 - 1 2026-06-19
AHY285 - 1 2026-07-04
AHY2358 - 1 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AHY036 MXP → GYD Jul 26, 10:25 UTCJul 26, 14:05 UTC3h 40m
2026-07-25 AHY035 GYD → MXP Jul 25, 12:20 UTCJul 26, 08:15 UTC19h 56m
2026-07-25 AHY035 GYD → MXP Jul 25, 11:20 UTCJul 26, 08:15 UTC20h 55m
2026-07-24 AHY109 GYD → PRG Jul 24, 14:30 UTCJul 25, 09:50 UTC19h 20m
2026-07-24 AHY109 GYD → PRG Jul 24, 12:20 UTCJul 25, 09:50 UTC21h 30m
2026-07-24 AHY109 GYD → PRG Jul 24, 11:25 UTCJul 25, 09:50 UTC22h 25m
2026-07-23 AHY109 GYD → PRG Jul 23, 14:20 UTCJul 24, 09:50 UTC19h 30m
2026-07-23 AHY110 PRG → GYD Jul 23, 11:35 UTCJul 24, 09:50 UTC22h 15m
2026-07-22 AHY109 GYD → PRG Jul 22, 14:20 UTCJul 23, 10:10 UTC19h 50m
2026-07-22 AHY109 GYD → PRG Jul 22, 12:20 UTCJul 23, 10:10 UTC21h 50m
2026-07-22 AHY109 GYD → PRG Jul 22, 11:20 UTCJul 23, 10:10 UTC22h 50m
2026-07-21 AHY078 IST → GYD Jul 21, 20:15 UTCJul 22, 10:25 UTC14h 10m
2026-07-21 AHY077 - Jul 21, 18:10 UTCJul 21, 18:35 UTC25m
2026-07-21 AHY077 - Jul 21, 16:15 UTCJul 21, 17:35 UTC1h 20m
2026-07-21 AHY072 VIE → GYD Jul 21, 11:15 UTCJul 21, 14:10 UTC2h 55m
2026-07-20 AHY071 GYD → VIE Jul 20, 12:20 UTCJul 21, 09:30 UTC21h 9m
2026-07-20 AHY036 MXP → VIE Jul 20, 10:30 UTCJul 21, 09:30 UTC23h 0m
2026-07-20 AHY035 - Jul 20, 04:15 UTCJul 20, 08:55 UTC4h 40m
2026-07-19 AHY035 - Jul 19, 13:10 UTCJul 20, 08:55 UTC19h 45m
2026-07-19 AHY035 - Jul 19, 10:20 UTCJul 20, 08:55 UTC22h 35m
2026-07-19 AHY035 - Jul 19, 09:55 UTCJul 20, 08:15 UTC22h 20m
2026-07-18 AHY035 - Jul 18, 12:20 UTCJul 19, 08:00 UTC19h 40m
2026-07-18 AHY035 PRG → MXP Jul 18, 11:30 UTCJul 19, 08:00 UTC20h 30m
2026-07-18 AHY109 - Jul 18, 05:45 UTCJul 18, 09:45 UTC4h 0m
2026-07-17 AHY036 - Jul 17, 09:50 UTCJul 17, 21:39 UTC11h 50m
2026-07-16 AHY035 - Jul 16, 13:15 UTCJul 17, 08:15 UTC19h 0m
2026-07-16 AHY035 - Jul 16, 10:20 UTCJul 17, 08:15 UTC21h 55m
2026-07-16 AHY035 MXP → MXP Jul 16, 09:50 UTCJul 17, 08:15 UTC22h 25m
2026-07-15 AHY035 - Jul 15, 16:50 UTCJul 16, 08:10 UTC15h 20m
2026-07-15 AHY036 - Jul 15, 09:45 UTCJul 15, 13:25 UTC3h 40m
2026-07-14 AHY035 - Jul 14, 13:10 UTCJul 15, 08:10 UTC18h 59m
2026-07-14 AHY035 - Jul 14, 10:20 UTCJul 15, 08:10 UTC21h 49m
2026-07-14 AHY035 MXP → MXP Jul 14, 10:00 UTCJul 15, 08:10 UTC22h 9m
2026-07-13 AHY035 - Jul 13, 12:20 UTCJul 14, 08:15 UTC19h 55m
2026-07-13 AHY035 VIE → MXP Jul 13, 11:15 UTCJul 14, 08:15 UTC21h 0m
2026-07-13 AHY071 - Jul 13, 06:01 UTCJul 13, 09:35 UTC3h 35m
2026-07-12 AHY8238 - Jul 12, 22:05 UTCJul 12, 22:35 UTC30m
2026-07-12 AHY8226 TBS → TBS Jul 12, 17:35 UTCJul 12, 20:45 UTC3h 10m
2026-07-12 AHY024 - Jul 12, 09:50 UTCJul 12, 16:05 UTC6h 15m
2026-07-11 AHY023 - Jul 11, 14:35 UTCJul 12, 08:20 UTC17h 45m
2026-07-11 AHY023 - Jul 11, 13:05 UTCJul 12, 08:20 UTC19h 15m
2026-07-11 AHY8105 - Jul 11, 09:20 UTCJul 11, 11:45 UTC2h 25m
2026-07-10 AHY8105 - Jul 10, 10:20 UTCJul 11, 10:15 UTC23h 55m
2026-07-10 AHY024 - Jul 10, 08:45 UTCJul 10, 10:40 UTC1h 55m
2026-07-09 AHY023 - Jul 9, 23:15 UTCJul 10, 07:15 UTC8h 0m
2026-07-09 AHY8225 - Jul 9, 15:20 UTCJul 9, 18:35 UTC3h 15m
2026-07-09 AHY2355 - Jul 9, 13:30 UTCJul 9, 13:50 UTC20m
2026-07-09 AHY024 - Jul 9, 08:50 UTCJul 9, 10:50 UTC2h 0m
2026-07-08 AHY023 - Jul 8, 22:15 UTCJul 9, 07:20 UTC9h 5m
2026-07-08 AHY8237 TBS → TBS Jul 8, 12:50 UTCJul 8, 20:50 UTC8h 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.

Mode-S 4246B9 frequently asked

What is Mode-S code 4246B9?
4246B9 is an ICAO 24-bit transponder address. Allocated to United Kingdom.
Where is Mode-S 4246B9 registered?
Mode-S code 4246B9 is allocated to United Kingdom (GB). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4246B9 broadcasting right now?
No active broadcast right now. Last signal was 21d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4246B9, octal 20443271, decimal 4,343,481.
What flights does 4246B9 operate?
Mode-S 4246B9 has broadcast 20 distinct callsigns, including AHY035, AHY109, AHY023, AHY024, AHY077.