Apparatus

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sensors Mode-S transponder

406C81

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-JZHC · BOEING 737-800

Hex
406C81
Octal
20066201
Decimal
4,222,081
Country
GB
Tail
G-JZHC
Type
B738
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
370
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 406C81.

Country allocation

The ICAO 24-bit address 406C81 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
EXS82PX Jet2.com 10 2026-06-02
EXS3XZ Jet2.com 10 2026-06-02
EXS531 Jet2.com 8 2026-06-03
EXS72BQ Jet2.com 7 2026-06-02
EXS43TL Jet2.com 7 2026-06-02
EXS37R Jet2.com 7 2026-06-03
EXS4NJ Jet2.com 6 2026-05-21
EXS44QA Jet2.com 6 2026-05-21
EXS804 - 5 2026-07-20
EXS4YZ Jet2.com 5 2026-07-20
EXS9PC - 4 2026-06-28
EXS7TQ Jet2.com 4 2026-05-30
EXS7RH Jet2.com 4 2026-04-20
EXS558 Jet2.com 4 2026-05-27
EXS557 Jet2.com 4 2026-05-27
EXS4VQ Jet2.com 4 2026-05-30
EXS26KP Jet2.com 4 2026-04-20
EXS1NM Jet2.com 4 2026-04-20
EXS19TW - 4 2026-06-28
EXS12M - 4 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EXS216 BJV → LBA Jul 26, 22:00 UTCJul 26, 22:15 UTC15m
2026-07-26 EXS15EP - Jul 26, 17:10 UTCJul 26, 20:25 UTC3h 15m
2026-07-26 EXS59LV ALC → LBA Jul 26, 12:45 UTCJul 26, 16:05 UTC3h 20m
2026-07-26 EXS5PH LBA → AGP Jul 26, 07:00 UTCJul 26, 09:30 UTC2h 30m
2026-07-24 EXS85RL NCL → HER Jul 24, 20:20 UTCJul 24, 22:35 UTC2h 15m
2026-07-24 EXS1TL - Jul 24, 16:10 UTCJul 24, 18:30 UTC2h 20m
2026-07-24 EXS31NH ALC → LTN Jul 24, 12:00 UTCJul 24, 14:15 UTC2h 15m
2026-07-24 EXS26VG CHQ → LBA Jul 24, 08:05 UTCJul 24, 10:45 UTC2h 40m
2026-07-23 EXS47MA LCA → FNC Jul 23, 21:30 UTCJul 24, 01:35 UTC4h 5m
2026-07-23 EXS9YA MAN → FNC Jul 23, 16:40 UTCJul 23, 20:10 UTC3h 30m
2026-07-23 EXS35GV LBA → LBA Jul 23, 06:10 UTCJul 23, 15:20 UTC9h 10m
2026-07-22 EXS5TV IBZ → NCL Jul 22, 20:50 UTCJul 23, 01:35 UTC4h 45m
2026-07-22 EXS7LX EDI → ALC Jul 22, 15:10 UTCJul 22, 19:15 UTC4h 5m
2026-07-22 EXS19H BOJ → LBA Jul 22, 11:10 UTCJul 22, 13:00 UTC1h 50m
2026-07-21 EXS17MT LGW → SOF Jul 21, 21:40 UTCJul 22, 01:15 UTC3h 35m
2026-07-21 EXS64KM TFS → BRS Jul 21, 17:20 UTCJul 21, 20:10 UTC2h 50m
2026-07-21 EXS8YM BHX → PMI Jul 21, 11:45 UTCJul 21, 15:40 UTC3h 55m
2026-07-21 EXS27B NCE → BHX Jul 21, 05:35 UTCJul 21, 09:00 UTC3h 25m
2026-07-20 EXS82FT BHX → EGC Jul 20, 21:50 UTCJul 21, 01:45 UTC3h 54m
2026-07-20 EXS68Q DBV → BHX Jul 20, 17:00 UTCJul 20, 20:25 UTC3h 25m
2026-07-20 EXS804 BCN → MAN Jul 20, 11:30 UTCJul 20, 13:35 UTC2h 5m
2026-07-20 EXS4YZ MAN → BCN Jul 20, 08:05 UTCJul 20, 10:00 UTC1h 55m
2026-07-20 EXS019P NCL → MAN Jul 20, 06:15 UTCJul 20, 06:30 UTC15m
2026-07-19 EXS5PV REU → NCL Jul 19, 21:05 UTCJul 19, 23:50 UTC2h 45m
2026-07-19 EXS57ML - Jul 19, 15:50 UTCJul 19, 19:10 UTC3h 20m
2026-07-19 EXS3TJ - Jul 19, 10:40 UTCJul 19, 14:30 UTC3h 50m
2026-07-19 EXS17CY - Jul 19, 05:15 UTCJul 19, 08:40 UTC3h 25m
2026-07-18 EXS7GY KGS → LBA Jul 18, 20:15 UTCJul 19, 00:10 UTC3h 55m
2026-07-18 EXS42EM LBA → KGS Jul 18, 15:15 UTCJul 18, 18:50 UTC3h 35m
2026-07-18 EXS5QD PMI → LBA Jul 18, 10:00 UTCJul 18, 13:25 UTC3h 25m
2026-07-18 EXS4BA LBA → AGP Jul 18, 05:30 UTCJul 18, 08:35 UTC3h 5m
2026-07-17 EXS85RL - Jul 17, 19:45 UTCJul 17, 22:05 UTC2h 20m
2026-07-17 EXS1TL - Jul 17, 16:19 UTCJul 17, 18:29 UTC2h 10m
2026-07-17 EXS31NH - Jul 17, 12:40 UTCJul 17, 14:55 UTC2h 15m
2026-07-17 EXS91KB MAN → TFS Jul 17, 08:20 UTCJul 17, 10:40 UTC2h 20m
2026-07-16 EXS14VP - Jul 16, 23:05 UTCJul 17, 02:50 UTC3h 45m
2026-07-16 EXS7FS - Jul 16, 18:15 UTCJul 16, 21:25 UTC3h 10m
2026-07-16 EXS17YP - Jul 16, 11:25 UTCJul 16, 13:45 UTC2h 20m
2026-07-16 EXS91KB - Jul 16, 07:30 UTCJul 16, 09:55 UTC2h 25m
2026-07-13 EXS17YP - Jul 13, 11:35 UTCJul 13, 14:05 UTC2h 30m
2026-07-13 EXS91KB - Jul 13, 07:50 UTCJul 13, 10:15 UTC2h 25m
2026-07-12 EXS15WT - Jul 12, 17:10 UTCJul 13, 01:30 UTC8h 20m
2026-07-12 EXS1408 ATH → STN Jul 12, 11:45 UTCJul 12, 15:15 UTC3h 30m
2026-07-12 EXS13BP - Jul 12, 06:55 UTCJul 12, 10:01 UTC3h 5m
2026-07-11 EXS674E - Jul 11, 21:05 UTCJul 11, 23:55 UTC2h 50m
2026-07-11 EXS56R - Jul 11, 16:40 UTCJul 11, 18:55 UTC2h 15m
2026-07-11 EXS2DR JKL → STN Jul 11, 11:00 UTCJul 11, 14:50 UTC3h 50m
2026-07-11 EXS53MP - Jul 11, 04:55 UTCJul 11, 08:25 UTC3h 30m
2026-07-10 EXS9P - Jul 10, 20:20 UTCJul 10, 23:50 UTC3h 30m
2026-07-10 EXS29JB - Jul 10, 15:55 UTCJul 10, 18:55 UTC3h 0m

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 G-JZHC page for operator, model, and routing details .

Mode-S 406C81 frequently asked

What is Mode-S code 406C81?
406C81 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-JZHC.
Where is Mode-S 406C81 registered?
Mode-S code 406C81 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 406C81 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406C81, octal 20066201, decimal 4,222,081.
What flights does 406C81 operate?
Mode-S 406C81 has broadcast 20 distinct callsigns, including EXS82PX, EXS3XZ, EXS531, EXS72BQ, EXS43TL.