Apparatus

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sensors Mode-S transponder

4243C3

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to VQ-BVB · BOEING 747-8

Hex
4243C3
Octal
20441703
Decimal
4,342,723
Country
GB
Tail
VQ-BVB
Type
B748
Broadcasting now · callsign AZG781 · 35,900 ft
Flights observed
192
Distinct callsigns
20
Country
GB
Last broadcast
6h ago

Current position

4243C3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4243C3 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
AZG922 Sakaviaservice 11 2026-07-02
AZG5789 - 8 2026-07-02
AZG5721 - 8 2026-06-30
AZG1923 - 8 2026-07-03
AZG923 Sakaviaservice 6 2026-06-22
AZG147 - 6 2026-06-23
AZG903 - 4 2026-07-04
AZG5722 - 4 2026-07-01
AZG209 Sakaviaservice 4 2026-04-16
AZG206 Sakaviaservice 4 2026-06-24
AZG205 Sakaviaservice 4 2026-06-24
AZG148 Sakaviaservice 4 2026-06-23
AZG997 - 3 2026-05-08
AZG692 Sakaviaservice 3 2026-04-30
AZG631 - 3 2026-04-18
AZG624 - 3 2026-06-29
AZG4871 Sakaviaservice 3 2026-05-23
AZG3235 - 3 2026-06-04
AZG210 - 3 2026-04-16
AZG204 Sakaviaservice 3 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AZG781 - Jul 14, 02:45 UTCJul 14, 04:10 UTC1h 25m
2026-07-13 AZG711 - Jul 13, 07:45 UTCJul 14, 00:45 UTC17h 0m
2026-07-12 AZG6861 - Jul 12, 22:20 UTCJul 13, 03:55 UTC5h 35m
2026-07-09 AZG219 - Jul 9, 04:00 UTCJul 9, 05:50 UTC1h 50m
2026-07-08 AZG218 - Jul 8, 21:55 UTCJul 9, 00:20 UTC2h 25m
2026-07-08 AZG428 - Jul 8, 14:20 UTCJul 8, 14:50 UTC30m
2026-07-08 AZG2711 - Jul 8, 02:50 UTCJul 8, 09:15 UTC6h 25m
2026-07-07 AZG3821 - Jul 7, 18:30 UTCJul 7, 22:45 UTC4h 15m
2026-07-07 AZG238 - Jul 7, 10:10 UTCJul 7, 13:50 UTC3h 40m
2026-07-07 AZG237 - Jul 7, 01:10 UTCJul 7, 05:30 UTC4h 20m
2026-07-05 AZG124 ICN → GYD Jul 5, 14:10 UTCJul 5, 14:30 UTC20m
2026-07-05 AZG904 - Jul 5, 09:45 UTCJul 5, 11:50 UTC2h 5m
2026-07-04 AZG903 - Jul 4, 16:35 UTCJul 5, 05:40 UTC13h 5m
2026-07-04 AZG903 - Jul 4, 09:55 UTCJul 5, 05:40 UTC19h 45m
2026-07-04 AZG414 BAH → DWC Jul 4, 05:00 UTCJul 4, 06:45 UTC1h 45m
2026-07-04 AZG1925 - Jul 4, 02:10 UTCJul 4, 02:35 UTC25m
2026-07-03 AZG1925 - Jul 3, 21:10 UTCJul 4, 01:00 UTC3h 50m
2026-07-03 AZG1924 - Jul 3, 10:00 UTCJul 3, 16:55 UTC6h 55m
2026-07-03 AZG1923 - Jul 3, 00:00 UTCJul 3, 06:15 UTC6h 15m
2026-07-02 AZG1923 - Jul 2, 23:05 UTCJul 2, 23:15 UTC10m
2026-07-02 AZG922 HKG → DWC Jul 2, 12:25 UTCJul 2, 20:20 UTC7h 55m
2026-07-02 AZG5789 - Jul 2, 01:50 UTCJul 2, 05:45 UTC3h 55m
2026-07-01 AZG5789 - Jul 1, 18:40 UTCJul 1, 23:55 UTC5h 15m
2026-07-01 AZG5789 IAH → HHN Jul 1, 14:50 UTCJul 1, 18:35 UTC3h 45m
2026-07-01 AZG5722 - Jul 1, 08:50 UTCJul 1, 10:25 UTC1h 35m
2026-06-30 AZG5721 - Jun 30, 20:30 UTCJul 1, 04:55 UTC8h 25m
2026-06-30 AZG5721 - Jun 30, 11:25 UTCJun 30, 18:00 UTC6h 35m
2026-06-29 AZG625 HKG → HKG Jun 29, 23:05 UTCJun 29, 23:19 UTC15m
2026-06-29 AZG624 - Jun 29, 19:44 UTCJun 29, 20:04 UTC20m
2026-06-29 AZG624 - Jun 29, 16:19 UTCJun 29, 18:05 UTC1h 45m
2026-06-29 AZG624 - Jun 29, 14:54 UTCJun 29, 15:04 UTC10m
2026-06-29 AZG3321 - Jun 29, 10:24 UTCJun 29, 10:50 UTC25m
2026-06-28 AZG3828 HHN → GYD Jun 28, 23:25 UTCJun 29, 03:10 UTC3h 45m
2026-06-28 AZG3827 - Jun 28, 15:14 UTCJun 28, 19:20 UTC4h 5m
2026-06-28 AZG1648 HKG → GYD Jun 28, 04:44 UTCJun 28, 05:04 UTC20m
2026-06-27 AZG1647 - Jun 27, 17:20 UTCJun 28, 00:50 UTC7h 30m
2026-06-27 AZG2713 - Jun 27, 07:15 UTCJun 27, 13:24 UTC6h 10m
2026-06-26 AZG2712 - Jun 26, 22:05 UTCJun 27, 04:19 UTC6h 15m
2026-06-26 AZG1923 - Jun 26, 17:59 UTCJun 26, 18:20 UTC20m
2026-06-26 AZG1923 - Jun 26, 12:14 UTCJun 26, 17:00 UTC4h 45m
2026-06-26 AZG1923 - Jun 26, 11:24 UTCJun 26, 11:40 UTC15m
2026-06-26 AZG1922 - Jun 26, 08:05 UTCJun 26, 08:45 UTC40m
2026-06-25 AZG3320 - Jun 25, 14:59 UTCJun 25, 16:09 UTC1h 10m
2026-06-25 AZG3319 - Jun 25, 07:09 UTCJun 25, 07:30 UTC20m
2026-06-25 AZG3319 - Jun 25, 06:14 UTCJun 25, 06:25 UTC10m
2026-06-24 AZG206 AMS → AMS Jun 24, 19:10 UTCJun 24, 23:04 UTC3h 55m
2026-06-24 AZG205 GYD → GYD Jun 24, 02:45 UTCJun 24, 13:14 UTC10h 30m
2026-06-23 AZG148 HKG → GYD Jun 23, 21:39 UTCJun 23, 21:59 UTC20m
2026-06-23 AZG147 - Jun 23, 18:45 UTCJun 23, 19:15 UTC30m
2026-06-22 AZG923 HKG → GYD Jun 22, 18:24 UTCJun 22, 18:40 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 VQ-BVB page for operator, model, and routing details .

Mode-S 4243C3 frequently asked

What is Mode-S code 4243C3?
4243C3 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to VQ-BVB.
Where is Mode-S 4243C3 registered?
Mode-S code 4243C3 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 4243C3 broadcasting right now?
Yes. Mode-S 4243C3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4243C3, octal 20441703, decimal 4,342,723.
What flights does 4243C3 operate?
Mode-S 4243C3 has broadcast 20 distinct callsigns, including AZG922, AZG5789, AZG5721, AZG1923, AZG923.