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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
Broadcasting now · callsign AHY045 · 36,000 ft
Flights observed
212
Distinct callsigns
20
Country
GB
Last broadcast
1h ago

Current position

4246B4 is currently broadcasting. Map zoomed to live position.

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

Callsign Airline Flights Last seen
AHY045 - 35 2026-07-08
AHY107 - 33 2026-07-06
AHY046 - 29 2026-07-09
AHY108 - 18 2026-07-05
AHY8105 - 7 2026-06-27
AHY175 - 4 2026-07-11
AHY071 - 4 2026-07-10
AHY8238 - 3 2026-07-10
AHY8226 - 3 2026-07-10
AHY109 - 3 2026-07-08
AHY072 - 3 2026-07-10
AHY8234 Azerbaijan Airlines 2 2026-05-03
AHY8233 Azerbaijan Airlines 2 2026-05-03
AHY8225 Azerbaijan Airlines 2 2026-05-05
AHY8042 - 2 2026-06-29
AHY8041 - 2 2026-06-28
AHY704 - 2 2026-06-13
AHY703 - 2 2026-06-13
AHY5249 - 2 2026-06-09
AHY5050 - 2 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AHY036 - Jul 13, 09:45 UTCJul 14, 04:30 UTC18h 45m
2026-07-12 AHY4004 LPL → MXP Jul 12, 13:25 UTCJul 13, 08:10 UTC18h 45m
2026-07-12 AHY4003 - Jul 12, 06:35 UTCJul 12, 12:25 UTC5h 50m
2026-07-11 AHY176 - Jul 11, 18:00 UTCJul 11, 19:50 UTC1h 50m
2026-07-11 AHY175 - Jul 11, 16:00 UTCJul 11, 16:25 UTC25m
2026-07-11 AHY056 - Jul 11, 09:05 UTCJul 11, 15:15 UTC6h 10m
2026-07-11 AHY055 - Jul 11, 04:30 UTCJul 11, 07:15 UTC2h 45m
2026-07-10 AHY8238 - Jul 10, 22:40 UTCJul 10, 23:05 UTC25m
2026-07-10 AHY8238 - Jul 10, 21:00 UTCJul 10, 21:30 UTC30m
2026-07-10 AHY8226 - Jul 10, 18:25 UTCJul 10, 18:50 UTC25m
2026-07-10 AHY072 VIE → TBS Jul 10, 11:15 UTCJul 10, 17:05 UTC5h 50m
2026-07-10 AHY071 - Jul 10, 06:00 UTCJul 10, 09:50 UTC3h 50m
2026-07-09 AHY5050 - Jul 9, 23:50 UTCJul 10, 02:40 UTC2h 50m
2026-07-09 AHY046 - Jul 9, 10:10 UTCJul 9, 22:30 UTC12h 20m
2026-07-08 AHY045 - Jul 8, 13:05 UTCJul 9, 08:20 UTC19h 15m
2026-07-08 AHY045 PRG → BCN Jul 8, 11:15 UTCJul 9, 08:20 UTC21h 5m
2026-07-08 AHY109 DEL → PRG Jul 8, 00:05 UTCJul 8, 09:50 UTC9h 45m
2026-07-07 AHY057 GYD → DEL Jul 7, 21:50 UTCJul 7, 22:40 UTC50m
2026-07-07 AHY046 - Jul 7, 10:55 UTCJul 7, 15:20 UTC4h 25m
2026-07-06 AHY045 - Jul 6, 13:05 UTCJul 7, 08:30 UTC19h 25m
2026-07-06 AHY045 - Jul 6, 11:05 UTCJul 7, 08:30 UTC21h 25m
2026-07-06 AHY045 - Jul 6, 10:55 UTCJul 7, 08:30 UTC21h 35m
2026-07-06 AHY107 - Jul 6, 03:55 UTCJul 6, 09:20 UTC5h 25m
2026-07-06 AHY2154 - Jul 6, 01:20 UTCJul 6, 01:40 UTC20m
2026-07-05 AHY2153 - Jul 5, 23:20 UTCJul 5, 23:40 UTC20m
2026-07-05 AHY2152 - Jul 5, 20:55 UTCJul 5, 21:15 UTC20m
2026-07-05 AHY2151 - Jul 5, 18:55 UTCJul 5, 19:20 UTC25m
2026-07-05 AHY108 - Jul 5, 11:20 UTCJul 5, 15:45 UTC4h 25m
2026-07-04 AHY107 - Jul 4, 21:45 UTCJul 5, 09:25 UTC11h 40m
2026-07-04 AHY034 - Jul 4, 11:10 UTCJul 4, 20:05 UTC8h 55m
2026-07-04 AHY033 - Jul 4, 00:00 UTCJul 4, 09:05 UTC9h 5m
2026-07-03 AHY024 - Jul 3, 08:45 UTCJul 3, 22:30 UTC13h 45m
2026-07-02 AHY023 - Jul 2, 21:50 UTCJul 3, 07:20 UTC9h 30m
2026-07-02 AHY059 - Jul 2, 20:05 UTCJul 2, 20:30 UTC25m
2026-07-02 AHY064 - Jul 2, 09:55 UTCJul 2, 13:30 UTC3h 35m
2026-07-01 AHY063 - Jul 1, 13:05 UTCJul 2, 08:10 UTC19h 5m
2026-07-01 AHY108 - Jul 1, 11:05 UTCJul 2, 08:10 UTC21h 5m
2026-07-01 AHY108 LGW → BER Jul 1, 10:45 UTCJul 2, 08:10 UTC21h 25m
2026-07-01 AHY107 - Jul 1, 04:05 UTCJul 1, 09:15 UTC5h 10m
2026-06-30 AHY107 - Jun 30, 13:05 UTCJul 1, 09:15 UTC20h 10m
2026-06-30 AHY107 - Jun 30, 11:05 UTCJul 1, 09:15 UTC22h 10m
2026-06-30 AHY046 - Jun 30, 10:05 UTCJul 1, 09:00 UTC22h 55m
2026-06-29 AHY045 - Jun 29, 19:35 UTCJun 30, 08:20 UTC12h 45m
2026-06-29 AHY175 - Jun 29, 17:24 UTCJun 29, 17:49 UTC25m
2026-06-29 AHY8042 - Jun 29, 10:10 UTCJun 29, 16:50 UTC6h 40m
2026-06-28 AHY8041 - Jun 28, 13:04 UTCJun 29, 08:24 UTC19h 20m
2026-06-28 AHY046 - Jun 28, 11:04 UTCJun 29, 08:24 UTC21h 20m
2026-06-28 AHY046 - Jun 28, 10:10 UTCJun 29, 08:24 UTC22h 15m
2026-06-27 AHY045 - Jun 27, 13:30 UTCJun 28, 08:25 UTC18h 55m
2026-06-27 AHY8105 - Jun 27, 11:39 UTCJun 27, 11:55 UTC15m

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?
Yes. Mode-S 4246B4 is currently airborne.
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.