Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4083BD

ICAO 24-bit transponder address · allocated to United Kingdom

Hex
4083BD
Octal
20101675
Decimal
4,228,029
Country
GB
No current signal · last broadcast Jul 12, 19:45 UTC
Flights observed
79
Distinct callsigns
7
Country
GB
Last broadcast
Jul 12, 19:45 UTC

Last known position

Most recent position reported by Mode-S 4083BD.

Country allocation

The ICAO 24-bit address 4083BD 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 7 distinct

Callsign Airline Flights Last seen
SSP23 - 28 2026-07-10
SSP44 - 18 2026-06-24
WHITE17 - 16 2026-06-20
JKY279 - 6 2026-07-05
SSP60 - 4 2026-07-12
SSP26 - 4 2026-07-04
SSP33 - 3 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 SSP60 - Jul 12, 19:35 UTCJul 12, 19:45 UTC10m
2026-07-12 SSP60 - Jul 12, 18:30 UTCJul 12, 18:55 UTC25m
2026-07-12 SSP60 - Jul 12, 11:35 UTCJul 12, 11:50 UTC15m
2026-07-12 SSP60 - Jul 12, 09:25 UTCJul 12, 11:20 UTC1h 55m
2026-07-10 SSP23 - Jul 10, 19:15 UTCJul 10, 19:30 UTC15m
2026-07-10 SSP23 - Jul 10, 18:50 UTCJul 10, 19:05 UTC15m
2026-07-10 SSP23 - Jul 10, 16:45 UTCJul 10, 17:15 UTC30m
2026-07-10 SSP23 - Jul 10, 09:40 UTCJul 10, 11:05 UTC1h 25m
2026-07-05 JKY279 - Jul 5, 15:35 UTCJul 5, 17:00 UTC1h 25m
2026-07-05 JKY279 - Jul 5, 14:25 UTCJul 5, 14:35 UTC10m
2026-07-05 JKY279 - Jul 5, 11:40 UTCJul 5, 12:00 UTC20m
2026-07-05 JKY279 - Jul 5, 11:15 UTCJul 5, 11:30 UTC15m
2026-07-05 JKY279 - Jul 5, 09:40 UTCJul 5, 10:05 UTC25m
2026-07-05 JKY279 - Jul 5, 08:40 UTCJul 5, 09:35 UTC55m
2026-07-04 SSP26 - Jul 4, 16:20 UTCJul 4, 16:35 UTC15m
2026-07-04 SSP26 - Jul 4, 15:55 UTCJul 4, 16:15 UTC20m
2026-07-04 SSP26 - Jul 4, 10:25 UTCJul 4, 10:45 UTC20m
2026-07-04 SSP26 - Jul 4, 09:25 UTCJul 4, 09:35 UTC10m
2026-07-01 SSP23 - Jul 1, 17:20 UTCJul 1, 17:30 UTC10m
2026-07-01 SSP23 - Jul 1, 16:10 UTCJul 1, 16:25 UTC15m
2026-07-01 SSP23 - Jul 1, 15:15 UTCJul 1, 15:50 UTC35m
2026-07-01 SSP23 - Jul 1, 12:30 UTCJul 1, 13:05 UTC35m
2026-07-01 SSP23 - Jul 1, 11:25 UTCJul 1, 11:50 UTC25m
2026-07-01 SSP23 - Jul 1, 11:05 UTCJul 1, 11:15 UTC10m
2026-06-24 SSP44 - Jun 24, 12:44 UTCJun 24, 13:34 UTC50m
2026-06-24 SSP44 - Jun 24, 10:35 UTCJun 24, 10:49 UTC15m
2026-06-24 SSP44 - Jun 24, 09:34 UTCJun 24, 09:49 UTC15m
2026-06-24 SSP44 - Jun 24, 07:34 UTCJun 24, 07:54 UTC20m
2026-06-24 SSP44 - Jun 24, 06:45 UTCJun 24, 06:55 UTC10m
2026-06-23 SSP44 - Jun 23, 11:10 UTCJun 23, 11:19 UTC10m
2026-06-23 SSP44 - Jun 23, 10:19 UTCJun 23, 10:39 UTC20m
2026-06-23 SSP44 - Jun 23, 09:40 UTCJun 23, 09:45 UTC5m
2026-06-23 SSP44 - Jun 23, 08:20 UTCJun 23, 08:30 UTC10m
2026-06-23 SSP44 - Jun 23, 07:35 UTCJun 23, 07:49 UTC15m
2026-06-23 SSP44 - Jun 23, 07:05 UTCJun 23, 07:15 UTC10m
2026-06-20 WHITE17 - Jun 20, 18:19 UTCJun 20, 18:29 UTC10m
2026-06-20 WHITE17 - Jun 20, 17:54 UTCJun 20, 18:10 UTC15m
2026-06-20 WHITE17 - Jun 20, 16:44 UTCJun 20, 17:24 UTC40m
2026-06-20 WHITE17 - Jun 20, 09:44 UTCJun 20, 11:09 UTC1h 25m
2026-06-20 WHITE17 - Jun 20, 09:19 UTCJun 20, 09:29 UTC10m
2026-06-19 SSP23 - Jun 19, 15:34 UTCJun 19, 16:14 UTC40m
2026-06-19 SSP23 - Jun 19, 14:39 UTCJun 19, 15:24 UTC45m
2026-06-19 SSP23 - Jun 19, 14:15 UTCJun 19, 14:24 UTC10m
2026-06-18 WHITE17 - Jun 18, 18:05 UTCJun 18, 19:20 UTC1h 15m
2026-06-18 WHITE17 - Jun 18, 10:45 UTCJun 18, 11:05 UTC20m
2026-06-18 WHITE17 - Jun 18, 10:05 UTCJun 18, 10:40 UTC35m
2026-06-18 WHITE17 - Jun 18, 09:25 UTCJun 18, 09:35 UTC10m
2026-06-17 WHITE17 - Jun 17, 18:30 UTCJun 17, 20:05 UTC1h 35m
2026-06-17 WHITE17 - Jun 17, 18:15 UTCJun 17, 18:25 UTC10m
2026-06-17 WHITE17 - Jun 17, 17:30 UTCJun 17, 17:45 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.

Mode-S 4083BD frequently asked

What is Mode-S code 4083BD?
4083BD is an ICAO 24-bit transponder address. Allocated to United Kingdom.
Where is Mode-S 4083BD registered?
Mode-S code 4083BD 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 4083BD broadcasting right now?
No active broadcast right now. Last signal was Jul 12, 19:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4083BD, octal 20101675, decimal 4,228,029.
What flights does 4083BD operate?
Mode-S 4083BD has broadcast 7 distinct callsigns, including SSP23, SSP44, WHITE17, JKY279, SSP60.