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sensors Mode-S transponder

4242F4

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to VP-BBS · BOEING 787-8 Dreamliner

Hex
4242F4
Octal
20441364
Decimal
4,342,516
Country
GB
Tail
VP-BBS
Type
B788
No current signal · last broadcast Jul 26, 18:55 UTC
Flights observed
242
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 18:55 UTC

Last known position

Most recent position reported by Mode-S 4242F4.

Country allocation

The ICAO 24-bit address 4242F4 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
AHY075 Azerbaijan Airlines 39 2026-07-25
AHY008 - 25 2026-07-25
AHY007 - 25 2026-07-25
AHY021 Azerbaijan Airlines 23 2026-07-23
AHY077 - 21 2026-06-28
AHY067 Azerbaijan Airlines 20 2026-07-26
AHY022 Azerbaijan Airlines 19 2026-07-20
AHY078 - 12 2026-06-28
AHY321 Azerbaijan Airlines 9 2026-07-24
AHY076 - 9 2026-07-08
AHY068 Azerbaijan Airlines 8 2026-07-26
AHY322 Azerbaijan Airlines 7 2026-07-24
AHY331 Azerbaijan Airlines 6 2026-07-22
AHY332 Azerbaijan Airlines 5 2026-07-22
AHY8003 Azerbaijan Airlines 2 2026-06-24
AHY121 Azerbaijan Airlines 2 2026-05-25
AHY023 - 2 2026-06-17
AHY8240 Azerbaijan Airlines 1 2026-06-26
AHY8230 - 1 2026-07-07
AHY8229 - 1 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AHY068 PEK → GYD Jul 26, 18:35 UTCJul 26, 18:55 UTC20m
2026-07-26 AHY067 GYD → PEK Jul 26, 15:15 UTCJul 26, 15:40 UTC25m
2026-07-25 AHY008 - Jul 25, 21:20 UTCJul 26, 01:40 UTC4h 20m
2026-07-25 AHY007 - Jul 25, 09:25 UTCJul 25, 19:40 UTC10h 15m
2026-07-25 AHY075 GYD → IST Jul 25, 07:00 UTCJul 25, 07:30 UTC30m
2026-07-25 AHY075 GYD → IST Jul 25, 05:05 UTCJul 25, 06:25 UTC1h 20m
2026-07-24 AHY322 TLV → GYD Jul 24, 22:15 UTCJul 25, 00:10 UTC1h 55m
2026-07-24 AHY321 GYD → TLV Jul 24, 08:45 UTCJul 24, 20:40 UTC11h 55m
2026-07-23 AHY021 GYD → TLV Jul 23, 22:00 UTCJul 24, 07:15 UTC9h 15m
2026-07-23 AHY321 GYD → TLV Jul 23, 17:45 UTCJul 23, 20:15 UTC2h 30m
2026-07-22 AHY332 TLV → GYD Jul 22, 21:15 UTCJul 22, 23:15 UTC2h 0m
2026-07-22 AHY331 GYD → TLV Jul 22, 11:10 UTCJul 22, 19:35 UTC8h 25m
2026-07-21 AHY068 - Jul 21, 18:30 UTCJul 21, 18:50 UTC20m
2026-07-21 AHY067 - Jul 21, 14:55 UTCJul 21, 15:15 UTC20m
2026-07-20 AHY322 TLV → GYD Jul 20, 20:25 UTCJul 20, 22:25 UTC2h 0m
2026-07-20 AHY321 - Jul 20, 16:25 UTCJul 20, 19:00 UTC2h 35m
2026-07-20 AHY022 TLV → GYD Jul 20, 09:55 UTCJul 20, 11:55 UTC2h 0m
2026-07-19 AHY021 - Jul 19, 23:10 UTCJul 20, 08:15 UTC9h 5m
2026-07-18 AHY008 - Jul 18, 21:40 UTCJul 19, 01:55 UTC4h 15m
2026-07-18 AHY007 - Jul 18, 09:15 UTCJul 18, 19:50 UTC10h 35m
2026-07-17 AHY075 - Jul 17, 18:29 UTCJul 18, 07:20 UTC12h 51m
2026-07-17 AHY067 - Jul 17, 14:35 UTCJul 17, 14:50 UTC15m
2026-07-16 AHY008 - Jul 16, 22:25 UTCJul 17, 02:39 UTC4h 15m
2026-07-16 AHY007 - Jul 16, 14:45 UTCJul 16, 20:00 UTC5h 15m
2026-07-16 AHY022 - Jul 16, 09:50 UTCJul 16, 11:45 UTC1h 55m
2026-07-16 AHY021 - Jul 16, 05:35 UTCJul 16, 08:20 UTC2h 45m
2026-07-15 AHY332 - Jul 15, 21:15 UTCJul 15, 23:15 UTC2h 0m
2026-07-15 AHY331 - Jul 15, 10:30 UTCJul 15, 19:45 UTC9h 15m
2026-07-15 AHY075 - Jul 15, 08:05 UTCJul 15, 08:35 UTC30m
2026-07-14 AHY075 - Jul 14, 23:05 UTCJul 15, 07:30 UTC8h 25m
2026-07-14 AHY068 - Jul 14, 18:55 UTCJul 14, 19:05 UTC10m
2026-07-14 AHY067 - Jul 14, 14:25 UTCJul 14, 14:50 UTC25m
2026-07-13 AHY322 - Jul 13, 20:35 UTCJul 13, 22:35 UTC2h 0m
2026-07-13 AHY321 GYD → TLV Jul 13, 16:30 UTCJul 13, 19:05 UTC2h 35m
2026-07-13 AHY022 - Jul 13, 10:25 UTCJul 13, 12:25 UTC2h 0m
2026-07-13 AHY021 - Jul 13, 05:40 UTCJul 13, 08:05 UTC2h 25m
2026-07-12 AHY322 - Jul 12, 20:10 UTCJul 12, 22:10 UTC2h 0m
2026-07-12 AHY321 GYD → TLV Jul 12, 15:55 UTCJul 12, 18:30 UTC2h 35m
2026-07-12 AHY022 - Jul 12, 09:40 UTCJul 12, 11:40 UTC2h 0m
2026-07-11 AHY021 TLV → TLV Jul 11, 21:10 UTCJul 12, 08:01 UTC10h 50m
2026-07-11 AHY331 - Jul 11, 09:15 UTCJul 11, 19:45 UTC10h 30m
2026-07-11 AHY075 - Jul 11, 06:55 UTCJul 11, 07:15 UTC20m
2026-07-11 AHY075 - Jul 11, 04:55 UTCJul 11, 06:15 UTC1h 20m
2026-07-10 AHY022 - Jul 10, 08:50 UTCJul 10, 10:50 UTC2h 0m
2026-07-10 AHY021 - Jul 10, 04:45 UTCJul 10, 07:30 UTC2h 45m
2026-07-09 AHY322 - Jul 9, 22:10 UTCJul 10, 00:05 UTC1h 55m
2026-07-09 AHY321 GYD → TLV Jul 9, 11:05 UTCJul 9, 20:35 UTC9h 30m
2026-07-09 AHY075 - Jul 9, 06:55 UTCJul 9, 09:30 UTC2h 35m
2026-07-08 AHY332 - Jul 8, 21:10 UTCJul 8, 23:05 UTC1h 55m
2026-07-08 AHY331 - Jul 8, 16:55 UTCJul 8, 19:30 UTC2h 35m

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-BBS page for operator, model, and routing details .

Mode-S 4242F4 frequently asked

What is Mode-S code 4242F4?
4242F4 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to VP-BBS.
Where is Mode-S 4242F4 registered?
Mode-S code 4242F4 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 4242F4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4242F4, octal 20441364, decimal 4,342,516.
What flights does 4242F4 operate?
Mode-S 4242F4 has broadcast 20 distinct callsigns, including AHY075, AHY008, AHY007, AHY021, AHY077.