Apparatus

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sensors Mode-S transponder

424502

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to VQ-BHE · BOEING 737-800

Hex
424502
Octal
20442402
Decimal
4,343,042
Country
GB
Tail
VQ-BHE
Type
B738
No current signal · last broadcast 2d ago
Flights observed
97
Distinct callsigns
20
Country
GB
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 424502.

Country allocation

The ICAO 24-bit address 424502 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
SMR275 - 27 2026-07-11
SMR231 Somon Air 9 2026-06-16
SMR7417 - 5 2026-06-12
SMR337 Somon Air 5 2026-06-25
SMR331 Somon Air 5 2026-05-28
SMR7420 - 4 2026-06-14
SMR221 - 4 2026-07-08
SMR104 - 4 2026-07-10
SMR110 Somon Air 3 2026-05-18
SMR109 Somon Air 3 2026-05-17
SMR106 - 3 2026-07-07
SMR8193 - 2 2026-07-02
SMR7428 - 2 2026-06-18
SMR7422 - 2 2026-06-15
SMR7414 Somon Air 2 2026-06-11
SMR276 Somon Air 2 2026-07-11
SMR222 Somon Air 2 2026-06-03
SMR203 Somon Air 2 2026-04-26
SMR105 - 2 2026-06-30
SMR103 - 2 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 SMR276 ZIA → LBD Jul 11, 21:15 UTCJul 11, 21:55 UTC40m
2026-07-11 SMR275 - Jul 11, 17:35 UTCJul 11, 18:10 UTC35m
2026-07-10 SMR104 - Jul 10, 08:15 UTCJul 10, 08:40 UTC25m
2026-07-10 SMR103 - Jul 10, 03:45 UTCJul 10, 06:15 UTC2h 30m
2026-07-08 SMR221 - Jul 8, 06:20 UTCJul 8, 23:45 UTC17h 25m
2026-07-07 SMR221 - Jul 7, 08:35 UTCJul 8, 06:45 UTC22h 10m
2026-07-07 SMR106 - Jul 7, 08:20 UTCJul 8, 06:30 UTC22h 10m
2026-07-03 SMR104 - Jul 3, 12:45 UTCJul 4, 08:25 UTC19h 40m
2026-07-03 SMR104 - Jul 3, 12:00 UTCJul 4, 08:25 UTC20h 25m
2026-07-02 SMR8194 - Jul 2, 14:35 UTCJul 3, 09:10 UTC18h 35m
2026-07-02 SMR8193 - Jul 2, 14:10 UTCJul 3, 09:10 UTC19h 0m
2026-07-02 SMR8193 - Jul 2, 11:45 UTCJul 2, 12:30 UTC45m
2026-06-30 SMR106 - Jun 30, 08:20 UTCJun 30, 08:45 UTC25m
2026-06-30 SMR105 - Jun 30, 03:40 UTCJun 30, 05:55 UTC2h 15m
2026-06-28 SMR221 - Jun 28, 16:00 UTCJun 28, 19:40 UTC3h 40m
2026-06-25 SMR337 DYU → ZIA Jun 25, 06:20 UTCJun 25, 06:50 UTC30m
2026-06-22 SMR275 - Jun 22, 19:54 UTCJun 22, 20:30 UTC35m
2026-06-19 SMR104 IST → DYU Jun 19, 08:14 UTCJun 19, 21:44 UTC13h 30m
2026-06-18 SMR103 - Jun 18, 13:50 UTCJun 19, 06:20 UTC16h 29m
2026-06-18 SMR7428 - Jun 18, 05:20 UTCJun 18, 05:55 UTC35m
2026-06-17 SMR7428 - Jun 17, 22:00 UTCJun 18, 04:25 UTC6h 25m
2026-06-16 SMR231 DYU → LED Jun 16, 05:25 UTCJun 16, 21:35 UTC16h 11m
2026-06-15 SMR7422 - Jun 15, 05:25 UTCJun 15, 05:45 UTC20m
2026-06-14 SMR7422 - Jun 14, 19:40 UTCJun 15, 03:40 UTC8h 0m
2026-06-14 SMR7420 - Jun 14, 03:05 UTCJun 14, 19:45 UTC16h 41m
2026-06-13 SMR7420 - Jun 13, 22:35 UTCJun 14, 19:45 UTC21h 10m
2026-06-13 SMR7420 - Jun 13, 22:10 UTCJun 14, 19:45 UTC21h 36m
2026-06-13 SMR7420 - Jun 13, 19:45 UTCJun 14, 04:20 UTC8h 35m
2026-06-13 SMR7418 - Jun 13, 03:10 UTCJun 13, 22:40 UTC19h 29m
2026-06-12 SMR7417 - Jun 12, 22:40 UTCJun 13, 22:30 UTC23h 49m
2026-06-12 SMR7417 - Jun 12, 22:05 UTCJun 13, 19:45 UTC21h 39m
2026-06-12 SMR7417 - Jun 12, 20:15 UTCJun 13, 03:40 UTC7h 25m
2026-06-12 SMR7417 - Jun 12, 06:40 UTCJun 13, 03:40 UTC21h 0m
2026-06-12 SMR7417 - Jun 12, 00:40 UTCJun 12, 23:20 UTC22h 40m
2026-06-11 SMR7416 - Jun 11, 22:50 UTCJun 12, 22:25 UTC23h 35m
2026-06-11 SMR7414 MED → DYU Jun 11, 03:10 UTCJun 12, 00:55 UTC21h 46m
2026-06-10 SMR7414 MED → DYU Jun 10, 20:05 UTCJun 11, 03:40 UTC7h 35m
2026-06-09 SMR337 DYU → ZIA Jun 9, 10:45 UTCJun 9, 20:20 UTC9h 35m
2026-06-09 SMR337 DYU → ZIA Jun 9, 00:00 UTCJun 9, 20:20 UTC20h 20m
2026-06-08 SMR275 LBD → ZIA Jun 8, 20:00 UTCJun 9, 11:05 UTC15h 5m
2026-06-07 SMR275 LBD → ZIA Jun 7, 18:45 UTCJun 7, 19:05 UTC20m
2026-06-06 SMR231 DYU → LED Jun 6, 00:25 UTCJun 6, 15:59 UTC15h 35m
2026-06-05 SMR231 DYU → LED Jun 5, 20:00 UTCJun 6, 15:59 UTC20h 0m
2026-06-04 SMR214 KJA → DYU Jun 4, 07:50 UTCJun 4, 13:40 UTC5h 50m
2026-06-03 SMR222 OVB → DYU Jun 3, 09:35 UTCJun 4, 08:15 UTC22h 40m
2026-06-03 SMR221 DYU → OVB Jun 3, 06:15 UTCJun 3, 10:00 UTC3h 45m
2026-06-01 SMR275 LBD → ZIA Jun 1, 20:25 UTCJun 1, 21:00 UTC35m
2026-05-31 SMR275 LBD → ZIA May 31, 11:20 UTCMay 31, 18:50 UTC7h 30m
2026-05-30 SMR275 LBD → ZIA May 30, 17:25 UTCMay 31, 11:25 UTC18h 0m
2026-05-28 SMR331 DYU → ZIA May 28, 20:45 UTCMay 29, 08:20 UTC11h 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 VQ-BHE page for operator, model, and routing details .

Mode-S 424502 frequently asked

What is Mode-S code 424502?
424502 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to VQ-BHE.
Where is Mode-S 424502 registered?
Mode-S code 424502 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 424502 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 424502, octal 20442402, decimal 4,343,042.
What flights does 424502 operate?
Mode-S 424502 has broadcast 20 distinct callsigns, including SMR275, SMR231, SMR7417, SMR337, SMR331.