Apparatus

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sensors Mode-S transponder

40039D

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to VQ-TPS · EMBRAER ERJ-145

Hex
40039D
Octal
20001635
Decimal
4,195,229
Country
GB
Tail
VQ-TPS
Type
E145
No current signal · last broadcast 8d ago
Flights observed
138
Distinct callsigns
20
Country
GB
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S 40039D.

Country allocation

The ICAO 24-bit address 40039D 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
IWY774 - 17 2026-07-05
IWY775 - 15 2026-07-05
IWY792 Interisland Airways Limited 10 2026-05-06
IWY793 Interisland Airways Limited 9 2026-05-06
IWY752 - 9 2026-07-03
IWY751 Interisland Airways Limited 9 2026-07-04
IWY796 Interisland Airways Limited 7 2026-05-05
IWY737 - 6 2026-07-03
IWY736 Interisland Airways Limited 6 2026-07-03
IWY797 Interisland Airways Limited 5 2026-05-05
IWY798 Interisland Airways Limited 4 2026-05-04
IWY791 Interisland Airways Limited 4 2026-05-05
IWY784 - 4 2026-06-29
IWY781 Interisland Airways Limited 4 2026-07-04
IWY735 - 4 2026-07-05
IWY783 Interisland Airways Limited 3 2026-06-29
IWY782 - 3 2026-07-04
IWY734 Interisland Airways Limited 3 2026-06-28
IWY733 Interisland Airways Limited 3 2026-04-28
IWY732 Interisland Airways Limited 3 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-05 IWY774 - Jul 5, 23:00 UTCJul 6, 00:50 UTC1h 50m
2026-07-05 IWY735 - Jul 5, 18:25 UTCJul 5, 21:40 UTC3h 15m
2026-07-05 IWY775 - Jul 5, 17:00 UTCJul 5, 17:10 UTC10m
2026-07-04 IWY774 - Jul 4, 22:15 UTCJul 5, 15:40 UTC17h 25m
2026-07-04 IWY774 - Jul 4, 20:35 UTCJul 5, 15:40 UTC19h 5m
2026-07-04 IWY782 - Jul 4, 18:35 UTCJul 4, 18:55 UTC20m
2026-07-04 IWY781 BGI → GEO Jul 4, 15:35 UTCJul 4, 15:55 UTC20m
2026-07-04 IWY751 POS → BGI Jul 4, 13:50 UTCJul 4, 14:25 UTC35m
2026-07-03 IWY752 - Jul 3, 23:00 UTCJul 3, 23:30 UTC30m
2026-07-03 IWY737 - Jul 3, 21:30 UTCJul 3, 21:45 UTC15m
2026-07-03 IWY736 BGI → SKB Jul 3, 18:55 UTCJul 3, 19:15 UTC20m
2026-07-03 IWY775 KIN → BGI Jul 3, 16:25 UTCJul 3, 16:40 UTC15m
2026-06-30 IWY774 - Jun 30, 22:15 UTCJul 1, 14:35 UTC16h 20m
2026-06-29 IWY764 - Jun 29, 23:54 UTCJun 30, 00:04 UTC10m
2026-06-29 IWY764 - Jun 29, 22:44 UTCJun 29, 23:05 UTC20m
2026-06-29 IWY784 - Jun 29, 21:19 UTCJun 29, 21:39 UTC20m
2026-06-29 IWY783 BGI → GEO Jun 29, 18:30 UTCJun 29, 18:55 UTC25m
2026-06-29 IWY775 KIN → BGI Jun 29, 16:44 UTCJun 29, 16:59 UTC15m
2026-06-28 IWY774 - Jun 28, 21:50 UTCJun 28, 23:39 UTC1h 50m
2026-06-28 IWY735 - Jun 28, 20:19 UTCJun 28, 20:34 UTC15m
2026-06-28 IWY734 BGI → SKB Jun 28, 17:50 UTCJun 28, 18:14 UTC25m
2026-06-28 IWY775 KIN → BGI Jun 28, 00:39 UTCJun 28, 16:45 UTC16h 5m
2026-06-21 IWY775 KIN → BGI Jun 21, 19:55 UTCJun 22, 00:10 UTC4h 15m
2026-06-21 IWY774 - Jun 21, 02:15 UTCJun 21, 20:00 UTC17h 45m
2026-06-19 IWY774 - Jun 19, 00:05 UTCJun 19, 00:14 UTC9m
2026-06-14 IWY775 KIN → BGI Jun 14, 23:44 UTCJun 15, 15:00 UTC15h 15m
2026-06-11 IWY775 KIN → BGI Jun 11, 23:00 UTCJun 12, 14:40 UTC15h 40m
2026-06-07 IWY775 KIN → BGI Jun 7, 17:30 UTCJun 8, 12:40 UTC19h 10m
2026-06-07 IWY774 BGI → SDQ Jun 7, 02:19 UTCJun 7, 17:35 UTC15h 15m
2026-06-04 IWY781 BGI → GEO Jun 4, 16:35 UTCJun 5, 02:00 UTC9h 25m
2026-05-17 IWY774 BGI → SDQ May 17, 23:00 UTCMay 18, 14:40 UTC15h 40m
2026-05-17 IWY775 KIN → BGI May 17, 14:35 UTCMay 17, 23:05 UTC8h 30m
2026-05-16 IWY774 BGI → SDQ May 16, 22:55 UTCMay 17, 14:40 UTC15h 45m
2026-05-07 IWY774 BGI → SDQ May 7, 22:35 UTCMay 8, 14:25 UTC15h 50m
2026-05-06 IWY737 SKB → BGI May 6, 21:05 UTCMay 6, 21:15 UTC10m
2026-05-06 IWY736 BGI → SKB May 6, 18:45 UTCMay 6, 19:00 UTC15m
2026-05-06 IWY793 ANU → BGI May 6, 17:05 UTCMay 6, 17:20 UTC15m
2026-05-06 IWY792 BGI → ANU May 6, 14:55 UTCMay 6, 15:10 UTC15m
2026-05-05 IWY797 ANU → BGI May 5, 21:30 UTCMay 5, 21:45 UTC15m
2026-05-05 IWY796 BGI → ANU May 5, 19:10 UTCMay 5, 19:20 UTC10m
2026-05-05 IWY782 GEO → BGI May 5, 17:30 UTCMay 5, 17:45 UTC15m
2026-05-05 IWY781 BGI → GEO May 5, 14:50 UTCMay 5, 15:05 UTC15m
2026-05-05 IWY791 ANU → BGI May 5, 13:30 UTCMay 5, 13:40 UTC10m
2026-05-04 IWY798 BGI → ANU May 4, 22:25 UTCMay 4, 22:40 UTC15m
2026-05-04 IWY784 GEO → BGI May 4, 18:15 UTCMay 4, 21:20 UTC3h 6m
2026-05-04 IWY792 BGI → ANU May 4, 15:00 UTCMay 4, 15:15 UTC15m
2026-05-04 IWY751 POS → BGI May 4, 13:10 UTCMay 4, 13:35 UTC25m
2026-05-03 IWY752 BGI → POS May 3, 22:30 UTCMay 3, 22:54 UTC25m
2026-05-03 IWY784 GEO → BGI May 3, 18:09 UTCMay 3, 21:10 UTC3h 0m
2026-05-03 IWY793 ANU → BGI May 3, 16:45 UTCMay 3, 16:55 UTC10m

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

Mode-S 40039D frequently asked

What is Mode-S code 40039D?
40039D is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to VQ-TPS.
Where is Mode-S 40039D registered?
Mode-S code 40039D 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 40039D broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40039D, octal 20001635, decimal 4,195,229.
What flights does 40039D operate?
Mode-S 40039D has broadcast 20 distinct callsigns, including IWY774, IWY775, IWY792, IWY793, IWY752.