Apparatus

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sensors Mode-S transponder

40039A

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to VQ-TAB · EMBRAER ERJ-145

Hex
40039A
Octal
20001632
Decimal
4,195,226
Country
GB
Tail
VQ-TAB
Type
E145
No current signal · last broadcast 12h ago
Flights observed
106
Distinct callsigns
20
Country
GB
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 40039A.

Country allocation

The ICAO 24-bit address 40039A 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 Interisland Airways Limited 15 2026-05-28
IWY775 Interisland Airways Limited 14 2026-05-14
IWY798 Interisland Airways Limited 6 2026-05-01
IWY751 Interisland Airways Limited 6 2026-05-05
IWY791 Interisland Airways Limited 5 2026-05-02
IWY752 Interisland Airways Limited 5 2026-05-04
IWY797 Interisland Airways Limited 4 2026-04-25
IWY796 Interisland Airways Limited 4 2026-04-25
IWY793 Interisland Airways Limited 4 2026-04-24
IWY792 Interisland Airways Limited 4 2026-04-24
IWY781 Interisland Airways Limited 4 2026-05-02
IWY733 Interisland Airways Limited 4 2026-05-05
IWY732 Interisland Airways Limited 4 2026-05-05
IWY784 Interisland Airways Limited 3 2026-05-06
IWY783 Interisland Airways Limited 3 2026-05-06
IWY782 Interisland Airways Limited 2 2026-04-28
IWY748 Interisland Airways Limited 2 2026-04-22
IWY737 Interisland Airways Limited 2 2026-04-24
IWY736 Interisland Airways Limited 2 2026-04-24
IWY735 Interisland Airways Limited 2 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-28 IWY774 BGI → SDQ May 28, 22:45 UTCMay 29, 14:30 UTC15h 45m
2026-05-23 IWY774 BGI → SDQ May 23, 22:35 UTCMay 24, 14:35 UTC16h 0m
2026-05-22 IWY774 BGI → SDQ May 22, 01:15 UTCMay 22, 14:50 UTC13h 35m
2026-05-19 IWY774 BGI → SDQ May 19, 22:05 UTCMay 20, 14:50 UTC16h 46m
2026-05-14 IWY775 KIN → BGI May 14, 22:30 UTCMay 15, 14:45 UTC16h 15m
2026-05-12 IWY775 KIN → BGI May 12, 22:35 UTCMay 13, 14:15 UTC15h 40m
2026-05-10 IWY775 KIN → BGI May 10, 22:40 UTCMay 11, 14:20 UTC15h 40m
2026-05-10 IWY775 KIN → BGI May 10, 14:34 UTCMay 11, 14:20 UTC23h 45m
2026-05-09 IWY774 BGI → SDQ May 9, 22:34 UTCMay 10, 14:34 UTC16h 0m
2026-05-06 IWY784 GEO → BGI May 6, 20:55 UTCMay 6, 21:10 UTC15m
2026-05-06 IWY783 BGI → GEO May 6, 18:25 UTCMay 6, 18:40 UTC15m
2026-05-06 IWY775 KIN → BGI May 6, 16:00 UTCMay 6, 16:15 UTC15m
2026-05-05 IWY774 BGI → SDQ May 5, 21:20 UTCMay 6, 14:40 UTC17h 20m
2026-05-05 IWY733 SKB → BGI May 5, 17:20 UTCMay 5, 17:30 UTC10m
2026-05-05 IWY732 BGI → SKB May 5, 15:05 UTCMay 5, 15:15 UTC10m
2026-05-05 IWY751 POS → BGI May 5, 13:05 UTCMay 5, 13:35 UTC30m
2026-05-04 IWY752 BGI → POS May 4, 22:35 UTCMay 4, 23:00 UTC25m
2026-05-03 IWY775 KIN → BGI May 3, 22:54 UTCMay 4, 14:15 UTC15h 20m
2026-05-03 IWY774 BGI → SDQ May 3, 21:10 UTCMay 3, 21:20 UTC10m
2026-05-03 IWY735 SKB → BGI May 3, 19:55 UTCMay 3, 20:05 UTC10m
2026-05-03 IWY734 BGI → SKB May 3, 17:29 UTCMay 3, 17:45 UTC15m
2026-05-03 IWY775 KIN → BGI May 3, 16:00 UTCMay 3, 16:09 UTC10m
2026-05-02 IWY774 BGI → SDQ May 2, 20:50 UTCMay 3, 14:40 UTC17h 49m
2026-05-02 IWY781 BGI → GEO May 2, 14:55 UTCMay 2, 17:40 UTC2h 45m
2026-05-02 IWY791 ANU → BGI May 2, 13:20 UTCMay 2, 13:30 UTC10m
2026-05-01 IWY798 BGI → ANU May 1, 22:55 UTCMay 1, 23:10 UTC15m
2026-05-01 IWY784 GEO → BGI May 1, 18:25 UTCMay 1, 21:40 UTC3h 15m
2026-05-01 IWY775 KIN → BGI May 1, 15:35 UTCMay 1, 15:45 UTC10m
2026-04-30 IWY774 BGI → SDQ Apr 30, 21:30 UTCMay 1, 14:20 UTC16h 50m
2026-04-30 IWY717 SVD → BGI Apr 30, 20:25 UTCApr 30, 20:45 UTC20m
2026-04-30 IWY716 BGI → SVD Apr 30, 19:10 UTCApr 30, 19:35 UTC25m
2026-04-30 IWY733 SKB → BGI Apr 30, 17:25 UTCApr 30, 17:35 UTC10m
2026-04-30 IWY732 BGI → SKB Apr 30, 14:55 UTCApr 30, 15:10 UTC15m
2026-04-30 IWY791 ANU → BGI Apr 30, 13:15 UTCApr 30, 13:25 UTC10m
2026-04-29 IWY798 BGI → ANU Apr 29, 22:35 UTCApr 29, 22:50 UTC15m
2026-04-29 IWY745 SVD → BGI Apr 29, 20:10 UTCApr 29, 20:30 UTC20m
2026-04-29 IWY744 BGI → SVD Apr 29, 19:15 UTCApr 29, 19:25 UTC10m
2026-04-29 IWY775 KIN → BGI Apr 29, 15:40 UTCApr 29, 15:50 UTC10m
2026-04-28 IWY774 BGI → SDQ Apr 28, 20:25 UTCApr 29, 14:20 UTC17h 56m
2026-04-28 IWY782 GEO → BGI Apr 28, 14:45 UTCApr 28, 17:30 UTC2h 45m
2026-04-28 IWY791 ANU → BGI Apr 28, 13:25 UTCApr 28, 13:40 UTC15m
2026-04-27 IWY798 BGI → ANU Apr 27, 22:50 UTCApr 27, 23:00 UTC10m
2026-04-27 IWY949 PLS → CAP Apr 27, 21:10 UTCApr 27, 21:20 UTC10m
2026-04-27 IWY948 BGI → CUR Apr 27, 16:40 UTCApr 27, 17:20 UTC40m
2026-04-27 IWY775 KIN → BGI Apr 27, 15:30 UTCApr 27, 15:40 UTC10m
2026-04-26 IWY774 BGI → SDQ Apr 26, 21:15 UTCApr 27, 14:05 UTC16h 50m
2026-04-26 IWY735 SKB → BGI Apr 26, 19:50 UTCApr 26, 20:00 UTC10m
2026-04-26 IWY734 BGI → SKB Apr 26, 17:20 UTCApr 26, 17:35 UTC15m
2026-04-26 IWY775 KIN → BGI Apr 26, 16:00 UTCApr 26, 16:10 UTC10m
2026-04-26 IWY774 BGI → SDQ Apr 26, 00:20 UTCApr 26, 14:40 UTC14h 20m

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

Mode-S 40039A frequently asked

What is Mode-S code 40039A?
40039A is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to VQ-TAB.
Where is Mode-S 40039A registered?
Mode-S code 40039A 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 40039A broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40039A, octal 20001632, decimal 4,195,226.
What flights does 40039A operate?
Mode-S 40039A has broadcast 20 distinct callsigns, including IWY774, IWY775, IWY798, IWY751, IWY791.