sensors Mode-S transponder

4246B4

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to VP-BAK · AIRBUS A-320neo

Hex
4246B4
Octal
20443264
Decimal
4,343,476
Country
GB
Tail
VP-BAK
Type
A20N
No current signal · last broadcast 2d ago
Flights observed
93
Distinct callsigns
20
Country
GB
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 4246B4.

Country allocation

The ICAO 24-bit address 4246B4 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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-27 AHY034 TIV → GYD May 27, 11:05 UTCMay 27, 14:10 UTC3h 5m
2026-05-26 AHY033 GYD → TIV May 26, 22:35 UTCMay 27, 09:10 UTC10h 35m
2026-05-26 AHY046 BCN → GYD May 26, 09:59 UTCMay 26, 20:54 UTC10h 55m
2026-05-25 AHY045 GYD → BCN May 25, 13:05 UTCMay 26, 08:04 UTC18h 59m
2026-05-25 AHY045 GYD → BCN May 25, 11:15 UTCMay 26, 08:04 UTC20h 50m
2026-05-24 AHY109 GYD → PRG May 24, 15:20 UTCMay 25, 09:40 UTC18h 20m
2026-05-24 AHY109 GYD → PRG May 24, 13:10 UTCMay 25, 09:40 UTC20h 30m
2026-05-24 AHY108 LGW → GYD May 24, 11:20 UTCMay 24, 13:05 UTC1h 45m
2026-05-24 AHY107 GYD → LGW May 24, 03:55 UTCMay 24, 09:05 UTC5h 10m
2026-05-22 AHY108 LGW → GYD May 22, 11:35 UTCMay 22, 16:15 UTC4h 40m
2026-05-21 AHY107 GYD → LGW May 21, 22:15 UTCMay 22, 09:45 UTC11h 30m
2026-05-20 AHY108 LGW → GYD May 20, 10:55 UTCMay 20, 15:45 UTC4h 50m
2026-05-20 AHY107 GYD → LGW May 20, 06:15 UTCMay 20, 09:05 UTC2h 50m
2026-05-19 AHY107 GYD → LGW May 19, 13:30 UTCMay 20, 09:05 UTC19h 36m
2026-05-19 AHY107 GYD → LGW May 19, 07:30 UTCMay 20, 07:00 UTC23h 31m
2026-05-18 AHY108 LGW → GYD May 18, 15:20 UTCMay 19, 13:35 UTC22h 14m
2026-05-18 AHY108 LGW → GYD May 18, 13:05 UTCMay 19, 07:35 UTC18h 29m
2026-05-18 AHY108 LGW → GYD May 18, 11:05 UTCMay 19, 07:35 UTC20h 29m
2026-05-18 AHY108 LGW → GYD May 18, 10:55 UTCMay 19, 07:35 UTC20h 39m
2026-05-17 AHY107 GYD → LGW May 17, 15:05 UTCMay 18, 09:20 UTC18h 15m
2026-05-17 AHY107 GYD → LGW May 17, 13:05 UTCMay 18, 09:20 UTC20h 15m
2026-05-17 AHY107 GYD → LGW May 17, 11:05 UTCMay 18, 09:20 UTC22h 15m
2026-05-17 AHY045 GYD → BCN May 17, 03:50 UTCMay 17, 09:15 UTC5h 25m
2026-05-16 AHY045 GYD → BCN May 16, 13:35 UTCMay 17, 09:15 UTC19h 40m
2026-05-15 AHY108 LGW → GYD May 15, 15:15 UTCMay 16, 13:41 UTC22h 26m
2026-05-15 AHY108 LGW → GYD May 15, 10:50 UTCMay 15, 21:00 UTC10h 10m
2026-05-15 AHY107 GYD → LGW May 15, 04:45 UTCMay 15, 09:10 UTC4h 25m
2026-05-14 AHY107 GYD → LGW May 14, 13:05 UTCMay 15, 09:10 UTC20h 5m
2026-05-14 AHY107 GYD → LGW May 14, 11:05 UTCMay 15, 09:10 UTC22h 5m
2026-05-14 AHY046 BCN → GYD May 14, 10:35 UTCMay 15, 09:00 UTC22h 25m
2026-05-13 AHY045 GYD → BCN May 13, 13:05 UTCMay 14, 08:55 UTC19h 50m
2026-05-13 AHY045 GYD → BCN May 13, 11:05 UTCMay 14, 08:55 UTC21h 50m
2026-05-12 AHY107 GYD → LGW May 12, 16:40 UTCMay 13, 09:35 UTC16h 55m
2026-05-12 AHY107 GYD → LGW May 12, 13:40 UTCMay 13, 09:35 UTC19h 55m
2026-05-12 AHY107 GYD → LGW May 12, 11:10 UTCMay 13, 09:35 UTC22h 25m
2026-05-12 AHY071 GYD → VIE May 12, 05:50 UTCMay 12, 09:35 UTC3h 45m
2026-05-11 AHY108 LGW → GYD May 11, 10:45 UTCMay 11, 15:25 UTC4h 40m
2026-05-11 AHY107 GYD → LGW May 11, 04:00 UTCMay 11, 09:15 UTC5h 15m
2026-05-10 AHY107 GYD → LGW May 10, 11:05 UTCMay 11, 09:15 UTC22h 10m
2026-05-10 AHY107 GYD → LGW May 10, 10:35 UTCMay 11, 09:00 UTC22h 25m
2026-05-09 AHY046 BCN → GYD May 9, 11:05 UTCMay 10, 06:25 UTC19h 20m
2026-05-09 AHY046 BCN → GYD May 9, 10:35 UTCMay 10, 06:25 UTC19h 50m
2026-05-09 AHY045 GYD → BCN May 9, 03:25 UTCMay 9, 08:45 UTC5h 20m
2026-05-08 AHY045 GYD → BCN May 8, 11:05 UTCMay 9, 08:45 UTC21h 40m
2026-05-08 AHY045 GYD → BCN May 8, 09:54 UTCMay 9, 08:45 UTC22h 50m
2026-05-08 AHY075 GYD → IST May 8, 05:14 UTCMay 8, 06:25 UTC1h 10m
2026-05-05 AHY8238 TBS → GYD May 5, 22:10 UTCMay 5, 22:40 UTC30m
2026-05-05 AHY8237 GYD → TBS May 5, 20:40 UTCMay 5, 21:01 UTC20m
2026-05-05 AHY8226 TBS → GYD May 5, 17:55 UTCMay 5, 18:25 UTC30m
2026-05-05 AHY8225 GYD → TBS May 5, 15:45 UTCMay 5, 16:15 UTC30m

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 VP-BAK page for operator, model, and routing details .

Mode-S 4246B4 frequently asked

What is Mode-S code 4246B4?
4246B4 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to VP-BAK.
Where is Mode-S 4246B4 registered?
Mode-S code 4246B4 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 4246B4 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4246B4, octal 20443264, decimal 4,343,476.
What flights does 4246B4 operate?
Mode-S 4246B4 has broadcast 20 distinct callsigns, including AHY045, AHY107, AHY046, AHY108, AHY8105.