Apparatus

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sensors Mode-S transponder

42441F

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to VQ-BBM · BOEING 747-8

Hex
42441F
Octal
20442037
Decimal
4,342,815
Country
GB
Tail
VQ-BBM
Type
B748
No current signal · last broadcast 1h ago
Flights observed
171
Distinct callsigns
20
Country
GB
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 42441F.

Country allocation

The ICAO 24-bit address 42441F 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
AZG203 Sakaviaservice 7 2026-06-16
AZG922 - 5 2026-07-08
AZG624 - 5 2026-06-16
AZG5721 - 5 2026-07-07
AZG148 Sakaviaservice 5 2026-05-26
AZG904 Sakaviaservice 4 2026-06-14
AZG204 Sakaviaservice 4 2026-06-17
AZG121 - 4 2026-07-03
AZG997 - 3 2026-06-19
AZG903 - 3 2026-06-14
AZG8592 - 3 2026-05-23
AZG631 - 3 2026-05-29
AZG620 Sakaviaservice 3 2026-06-09
AZG6117 Sakaviaservice 3 2026-04-17
AZG572 - 3 2026-06-30
AZG571 Sakaviaservice 3 2026-05-09
AZG3824 Sakaviaservice 3 2026-07-02
AZG3823 - 3 2026-07-02
AZG3821 - 3 2026-06-02
AZG274 - 3 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AZG5517 - Jul 14, 14:10 UTCJul 14, 14:55 UTC45m
2026-07-13 AZG3828 - Jul 13, 03:20 UTCJul 13, 07:01 UTC3h 40m
2026-07-12 AZG3827 - Jul 12, 19:10 UTCJul 12, 23:25 UTC4h 15m
2026-07-12 AGG1612 - Jul 12, 06:35 UTCJul 12, 06:55 UTC20m
2026-07-11 AZG1511 - Jul 11, 19:30 UTCJul 12, 03:40 UTC8h 10m
2026-07-11 AZG5010 - Jul 11, 08:20 UTCJul 11, 09:05 UTC45m
2026-07-10 AZG8993 - Jul 10, 20:20 UTCJul 10, 20:45 UTC25m
2026-07-10 AZG2713 - Jul 10, 06:40 UTCJul 10, 13:05 UTC6h 25m
2026-07-10 AZG2712 - Jul 10, 01:05 UTCJul 10, 02:20 UTC1h 15m
2026-07-09 AZG1923 - Jul 9, 16:20 UTCJul 9, 16:30 UTC10m
2026-07-09 AZG1923 - Jul 9, 11:40 UTCJul 9, 15:10 UTC3h 30m
2026-07-09 AZG1923 - Jul 9, 09:35 UTCJul 9, 09:45 UTC10m
2026-07-08 AZG922 - Jul 8, 22:50 UTCJul 9, 07:05 UTC8h 15m
2026-07-08 AZG5789 - Jul 8, 14:45 UTCJul 8, 18:35 UTC3h 50m
2026-07-08 AZG5789 - Jul 8, 03:20 UTCJul 8, 13:00 UTC9h 40m
2026-07-07 AZG5722 - Jul 7, 21:05 UTCJul 7, 22:45 UTC1h 40m
2026-07-07 AZG5721 - Jul 7, 09:40 UTCJul 7, 18:10 UTC8h 30m
2026-07-07 AZG5721 - Jul 7, 06:50 UTCJul 7, 07:05 UTC15m
2026-07-07 AZG5721 - Jul 7, 00:10 UTCJul 7, 05:30 UTC5h 20m
2026-07-06 AZG1648 HKG → GYD Jul 6, 09:40 UTCJul 6, 10:00 UTC20m
2026-07-06 AZG1647 - Jul 6, 06:45 UTCJul 6, 07:20 UTC35m
2026-07-05 AZG1647 - Jul 5, 23:10 UTCJul 5, 23:40 UTC30m
2026-07-05 AZG422 - Jul 5, 19:40 UTCJul 5, 20:30 UTC50m
2026-07-05 AZG5515 - Jul 5, 14:05 UTCJul 5, 14:55 UTC50m
2026-07-05 AZG234 - Jul 5, 06:40 UTCJul 5, 10:15 UTC3h 35m
2026-07-04 AZG233 - Jul 4, 23:10 UTCJul 5, 03:25 UTC4h 15m
2026-07-03 AZG122 - Jul 3, 16:10 UTCJul 3, 21:05 UTC4h 55m
2026-07-03 AZG121 - Jul 3, 12:30 UTCJul 3, 12:55 UTC25m
2026-07-02 AZG3824 HHN → GYD Jul 2, 22:05 UTCJul 3, 01:40 UTC3h 35m
2026-07-02 AZG3823 - Jul 2, 13:25 UTCJul 2, 17:35 UTC4h 10m
2026-07-01 AZG247 - Jul 1, 21:45 UTCJul 1, 22:05 UTC20m
2026-07-01 AZG246 - Jul 1, 05:35 UTCJul 1, 19:00 UTC13h 25m
2026-06-30 AZG246 - Jun 30, 21:40 UTCJul 1, 19:00 UTC21h 20m
2026-06-30 AZG572 - Jun 30, 15:00 UTCJun 30, 15:25 UTC25m
2026-06-30 AZG572 - Jun 30, 09:25 UTCJun 30, 14:00 UTC4h 35m
2026-06-30 AZG572 - Jun 30, 08:15 UTCJun 30, 08:35 UTC20m
2026-06-30 AZG922 HKG → DWC Jun 30, 05:05 UTCJun 30, 05:55 UTC50m
2026-06-26 AZG122 - Jun 26, 14:39 UTCJun 26, 15:49 UTC1h 10m
2026-06-26 AZG121 - Jun 26, 11:24 UTCJun 26, 11:49 UTC25m
2026-06-25 AZG281 VIE → JFK Jun 25, 21:59 UTCJun 26, 00:55 UTC2h 55m
2026-06-25 AZG3824 HHN → GYD Jun 25, 08:24 UTCJun 25, 19:15 UTC10h 50m
2026-06-25 AZG3823 - Jun 25, 00:09 UTCJun 25, 04:10 UTC4h 0m
2026-06-24 AZG262 LUX → GYD Jun 24, 16:05 UTCJun 24, 19:49 UTC3h 45m
2026-06-24 AZG4872 ORD → EMA Jun 24, 12:20 UTCJun 24, 12:40 UTC20m
2026-06-24 AZG4872 ORD → EMA Jun 24, 03:29 UTCJun 24, 07:20 UTC3h 50m
2026-06-23 AZG5722 JFK → HHN Jun 23, 21:14 UTCJun 23, 23:00 UTC1h 45m
2026-06-23 AZG5721 - Jun 23, 09:05 UTCJun 23, 17:25 UTC8h 20m
2026-06-22 AZG5721 - Jun 22, 23:50 UTCJun 23, 06:29 UTC6h 40m
2026-06-22 AZG648 HKG → HKG Jun 22, 10:49 UTCJun 22, 11:04 UTC15m
2026-06-22 AZG647 DMM → HKG Jun 22, 07:49 UTCJun 22, 08:19 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 VQ-BBM page for operator, model, and routing details .

Mode-S 42441F frequently asked

What is Mode-S code 42441F?
42441F is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to VQ-BBM.
Where is Mode-S 42441F registered?
Mode-S code 42441F 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 42441F broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 42441F, octal 20442037, decimal 4,342,815.
What flights does 42441F operate?
Mode-S 42441F has broadcast 20 distinct callsigns, including AZG203, AZG922, AZG624, AZG5721, AZG148.