Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

40742E

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-CKOF · BOEING 787-9 Dreamliner

Hex
40742E
Octal
20072056
Decimal
4,224,046
Country
GB
Tail
G-CKOF
Type
B789
No current signal · last broadcast 2h ago
Flights observed
137
Distinct callsigns
17
Country
GB
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 40742E.

Country allocation

The ICAO 24-bit address 40742E 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 17 distinct

Callsign Airline Flights Last seen
UBT78T - 21 2026-07-17
UBT78G - 21 2026-07-16
NBT40H - 17 2026-06-17
NBT40S - 15 2026-06-17
UBT795 Norse Atlantic UK 11 2026-04-26
UBT70Z - 11 2026-07-17
UBT70A - 11 2026-07-17
UBT796 Norse Atlantic UK 10 2026-04-26
UBT792 Norse Atlantic UK 7 2026-04-15
UBT791 Norse Atlantic UK 5 2026-04-15
UBT70N Norse Atlantic UK 2 2026-06-18
UBT902 Norse Atlantic UK 1 2026-05-22
UBT901 Norse Atlantic UK 1 2026-05-06
UBT784D - 1 2026-07-15
UBT783D - 1 2026-07-14
UBT70M Norse Atlantic UK 1 2026-06-09
NBT50E Norse Atlantic Airways 1 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 UBT70Z - Jul 17, 22:49 UTCJul 18, 00:25 UTC1h 35m
2026-07-17 UBT70A LGW → JFK Jul 17, 12:35 UTCJul 17, 19:30 UTC6h 55m
2026-07-17 UBT78T MCO → LGW Jul 17, 00:55 UTCJul 17, 08:49 UTC7h 55m
2026-07-16 UBT78G LGW → MCO Jul 16, 13:34 UTCJul 16, 21:55 UTC8h 20m
2026-07-15 UBT784D MCO → LGW Jul 15, 19:45 UTCJul 16, 03:35 UTC7h 50m
2026-07-14 UBT783D LGW → MCO Jul 14, 17:00 UTCJul 15, 01:10 UTC8h 9m
2026-07-13 UBT78G LGW → LGW Jul 13, 14:25 UTCJul 13, 15:45 UTC1h 20m
2026-07-12 UBT70Z JFK → LGW Jul 12, 22:50 UTCJul 13, 05:15 UTC6h 25m
2026-07-12 UBT70A LGW → JFK Jul 12, 12:25 UTCJul 12, 19:05 UTC6h 40m
2026-07-12 UBT78T MCO → LGW Jul 12, 01:15 UTCJul 12, 08:55 UTC7h 40m
2026-07-11 UBT78G LGW → MCO Jul 11, 13:35 UTCJul 11, 21:55 UTC8h 20m
2026-07-10 UBT70Z JFK → LGW Jul 10, 22:55 UTCJul 11, 05:05 UTC6h 10m
2026-07-10 UBT70A LGW → JFK Jul 10, 12:30 UTCJul 10, 19:50 UTC7h 20m
2026-07-10 UBT78T - Jul 10, 02:40 UTCJul 10, 09:00 UTC6h 20m
2026-07-10 UBT78T - Jul 10, 00:45 UTCJul 10, 02:35 UTC1h 50m
2026-07-09 UBT78G LGW → MCO Jul 9, 13:45 UTCJul 9, 22:15 UTC8h 30m
2026-07-08 UBT70Z - Jul 8, 23:15 UTCJul 9, 05:35 UTC6h 20m
2026-07-08 UBT70A LGW → JFK Jul 8, 12:35 UTCJul 8, 19:20 UTC6h 45m
2026-07-07 UBT78T - Jul 7, 08:35 UTCJul 7, 09:10 UTC35m
2026-07-07 UBT78T - Jul 7, 01:20 UTCJul 7, 08:30 UTC7h 10m
2026-07-06 UBT78G - Jul 6, 13:45 UTCJul 6, 22:15 UTC8h 30m
2026-07-05 UBT70Z JFK → LGW Jul 5, 23:20 UTCJul 6, 05:20 UTC6h 0m
2026-07-04 UBT70A LGW → JFK Jul 4, 12:40 UTCJul 4, 19:55 UTC7h 15m
2026-07-04 UBT78T MCO → LGW Jul 4, 01:15 UTCJul 4, 09:00 UTC7h 45m
2026-07-03 UBT78G LGW → MCO Jul 3, 13:20 UTCJul 3, 22:00 UTC8h 40m
2026-07-03 UBT70Z JFK → LGW Jul 3, 00:20 UTCJul 3, 06:15 UTC5h 55m
2026-07-02 UBT70A LGW → JFK Jul 2, 14:30 UTCJul 2, 21:45 UTC7h 15m
2026-07-02 UBT78T MCO → LGW Jul 2, 01:15 UTCJul 2, 09:00 UTC7h 45m
2026-07-01 UBT78G LGW → MCO Jul 1, 13:30 UTCJul 1, 22:20 UTC8h 50m
2026-07-01 UBT78T MCO → LGW Jul 1, 01:35 UTCJul 1, 09:25 UTC7h 50m
2026-06-30 UBT78G LGW → MCO Jun 30, 13:45 UTCJun 30, 22:40 UTC8h 55m
2026-06-30 UBT78T - Jun 30, 01:25 UTCJun 30, 08:50 UTC7h 26m
2026-06-29 UBT78G LGW → MCO Jun 29, 13:39 UTCJun 29, 23:05 UTC9h 25m
2026-06-29 UBT78T MCO → LGW Jun 29, 00:54 UTCJun 29, 08:35 UTC7h 40m
2026-06-28 UBT78G LGW → MCO Jun 28, 13:49 UTCJun 28, 22:29 UTC8h 40m
2026-06-28 UBT78T MCO → LGW Jun 28, 00:59 UTCJun 28, 08:34 UTC7h 35m
2026-06-27 UBT78G LGW → MCO Jun 27, 13:20 UTCJun 27, 22:20 UTC9h 0m
2026-06-27 UBT78T MCO → LGW Jun 27, 00:44 UTCJun 27, 08:49 UTC8h 5m
2026-06-26 UBT78G LGW → MCO Jun 26, 13:30 UTCJun 26, 22:10 UTC8h 40m
2026-06-26 UBT78T MCO → LGW Jun 26, 00:50 UTCJun 26, 08:20 UTC7h 30m
2026-06-25 UBT78G LGW → MCO Jun 25, 13:29 UTCJun 25, 22:20 UTC8h 50m
2026-06-24 UBT70Z JFK → LGW Jun 24, 23:20 UTCJun 25, 05:15 UTC5h 55m
2026-06-24 UBT70A LGW → JFK Jun 24, 13:10 UTCJun 24, 20:24 UTC7h 15m
2026-06-23 UBT70Z JFK → LGW Jun 23, 23:10 UTCJun 24, 05:20 UTC6h 10m
2026-06-23 UBT70A LGW → JFK Jun 23, 12:35 UTCJun 23, 19:44 UTC7h 10m
2026-06-23 UBT78T MCO → LGW Jun 23, 01:20 UTCJun 23, 09:05 UTC7h 45m
2026-06-22 UBT78G LGW → MCO Jun 22, 13:29 UTCJun 22, 22:24 UTC8h 55m
2026-06-22 UBT78T MCO → LGW Jun 22, 01:05 UTCJun 22, 08:54 UTC7h 50m
2026-06-21 UBT78G LGW → MCO Jun 21, 13:50 UTCJun 21, 22:29 UTC8h 40m
2026-06-20 UBT70Z JFK → LGW Jun 20, 22:45 UTCJun 21, 05:04 UTC6h 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 G-CKOF page for operator, model, and routing details .

Mode-S 40742E frequently asked

What is Mode-S code 40742E?
40742E is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CKOF.
Where is Mode-S 40742E registered?
Mode-S code 40742E 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 40742E broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40742E, octal 20072056, decimal 4,224,046.
What flights does 40742E operate?
Mode-S 40742E has broadcast 17 distinct callsigns, including UBT78T, UBT78G, NBT40H, NBT40S, UBT795.