Apparatus

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sensors Mode-S transponder

407D74

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-TTNT · AIRBUS A-320neo

Hex
407D74
Octal
20076564
Decimal
4,226,420
Country
GB
Tail
G-TTNT
Type
A20N
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
474
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S 407D74.

Country allocation

The ICAO 24-bit address 407D74 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
BAW398 British Airways 13 2026-07-26
BAW521 - 12 2026-07-12
BAW520R - 12 2026-07-12
BAW399 British Airways 10 2026-07-21
BAW709 - 6 2026-07-08
BAW708 - 6 2026-07-08
BAW717 British Airways 5 2026-07-22
BAW669R - 5 2026-07-18
BAW668R - 5 2026-07-18
BAW509 - 5 2026-06-17
BAW508 - 5 2026-06-16
SHT17L - 4 2026-07-07
SHT16E - 4 2026-07-07
BAW743 - 4 2026-07-23
BAW742 British Airways 4 2026-07-23
BAW716 - 4 2026-07-22
BAW528 - 4 2026-07-04
BAW331 British Airways 4 2026-05-30
SHT9X - 3 2026-07-20
SHT8P - 3 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BAW398 LHR → BRU Jul 26, 17:55 UTCJul 26, 22:00 UTC4h 5m
2026-07-26 BAW817 CPH → LHR Jul 26, 14:50 UTCJul 26, 16:25 UTC1h 35m
2026-07-26 BAW816 LHR → CPH Jul 26, 12:00 UTCJul 26, 13:20 UTC1h 20m
2026-07-26 SHT15D JER → LHR Jul 26, 09:45 UTCJul 26, 10:25 UTC40m
2026-07-26 SHT14L LHR → JER Jul 26, 08:05 UTCJul 26, 08:40 UTC35m
2026-07-26 BAW911U FRA → LHR Jul 26, 04:55 UTCJul 26, 06:20 UTC1h 25m
2026-07-25 BAW910N LHR → FRA Jul 25, 19:00 UTCJul 25, 20:05 UTC1h 5m
2026-07-25 BAW705 VIE → LHR Jul 25, 11:50 UTCJul 25, 16:20 UTC4h 30m
2026-07-25 BAW704 LHR → VIE Jul 25, 06:15 UTCJul 25, 10:10 UTC3h 55m
2026-07-24 BAW33A ATH → LHR Jul 24, 18:10 UTCJul 24, 21:35 UTC3h 25m
2026-07-24 BAW32T LHR → ATH Jul 24, 13:25 UTCJul 24, 16:30 UTC3h 5m
2026-07-24 BAW303 CDG → LHR Jul 24, 10:10 UTCJul 24, 11:05 UTC55m
2026-07-24 BAW302 CDG → LHR Jul 24, 08:00 UTCJul 24, 08:45 UTC45m
2026-07-24 BAW99C BER → LHR Jul 24, 04:40 UTCJul 24, 06:15 UTC1h 35m
2026-07-23 BAW998 LHR → BER Jul 23, 18:55 UTCJul 23, 20:20 UTC1h 25m
2026-07-23 BAW553C FCO → LHR Jul 23, 15:00 UTCJul 23, 17:15 UTC2h 15m
2026-07-23 BAW552F LHR → FCO Jul 23, 11:30 UTCJul 23, 13:20 UTC1h 50m
2026-07-23 BAW743 - Jul 23, 08:20 UTCJul 23, 09:40 UTC1h 20m
2026-07-23 BAW742 LHR → HER Jul 23, 05:45 UTCJul 23, 06:55 UTC1h 10m
2026-07-22 BAW717 ZRH → LHR Jul 22, 17:05 UTCJul 22, 20:40 UTC3h 35m
2026-07-22 BAW716 - Jul 22, 11:55 UTCJul 22, 14:50 UTC2h 55m
2026-07-21 BAW337 MRS → LHR Jul 21, 19:45 UTCJul 21, 21:25 UTC1h 40m
2026-07-21 BAW336 LHR → MRS Jul 21, 17:00 UTCJul 21, 18:35 UTC1h 35m
2026-07-21 BAW749 BSL → LHR Jul 21, 13:55 UTCJul 21, 15:10 UTC1h 15m
2026-07-21 BAW748 LHR → BSL Jul 21, 11:20 UTCJul 21, 12:35 UTC1h 15m
2026-07-21 BAW399 BRU → LHR Jul 21, 05:35 UTCJul 21, 09:40 UTC4h 5m
2026-07-20 BAW398 - Jul 20, 18:00 UTCJul 20, 22:05 UTC4h 5m
2026-07-20 BAW527 - Jul 20, 14:05 UTCJul 20, 16:30 UTC2h 25m
2026-07-20 BAW526 LHR → SPU Jul 20, 09:55 UTCJul 20, 12:00 UTC2h 5m
2026-07-20 SHT9X EDI → LHR Jul 20, 07:15 UTCJul 20, 08:30 UTC1h 15m
2026-07-19 SHT8P - Jul 19, 21:05 UTCJul 19, 22:00 UTC55m
2026-07-19 BAW505 FAO → LHR Jul 19, 17:30 UTCJul 19, 19:40 UTC2h 10m
2026-07-19 BAW5DW - Jul 19, 13:20 UTCJul 19, 15:45 UTC2h 25m
2026-07-19 BAW87AM BER → LHR Jul 19, 09:35 UTCJul 19, 11:00 UTC1h 25m
2026-07-19 BAW986G LHR → BER Jul 19, 06:55 UTCJul 19, 08:20 UTC1h 25m
2026-07-18 BAW669R JMK → LHR Jul 18, 17:20 UTCJul 18, 20:55 UTC3h 35m
2026-07-18 BAW668R LHR → JMK Jul 18, 11:50 UTCJul 18, 15:00 UTC3h 10m
2026-07-18 BAW353 - Jul 18, 05:35 UTCJul 18, 07:25 UTC1h 50m
2026-07-17 BAW352 - Jul 17, 19:35 UTCJul 17, 21:05 UTC1h 30m
2026-07-17 BAW837 DBV → LHR Jul 17, 15:25 UTCJul 17, 18:05 UTC2h 40m
2026-07-17 BAW836 LHR → DBV Jul 17, 11:10 UTCJul 17, 13:20 UTC2h 10m
2026-07-17 BAW429 - Jul 17, 08:40 UTCJul 17, 09:25 UTC45m
2026-07-17 BAW428 LHR → AMS Jul 17, 06:15 UTCJul 17, 07:05 UTC50m
2026-07-16 BAW907 FRA → LHR Jul 16, 17:45 UTCJul 16, 19:10 UTC1h 25m
2026-07-16 BAW906 LHR → FRA Jul 16, 15:25 UTCJul 16, 16:35 UTC1h 10m
2026-07-16 BAW801 - Jul 16, 10:50 UTCJul 16, 13:25 UTC2h 35m
2026-07-16 BAW800 - Jul 16, 06:55 UTCJul 16, 09:30 UTC2h 35m
2026-07-15 BAW739 ZRH → LHR Jul 15, 18:00 UTCJul 15, 19:25 UTC1h 25m
2026-07-15 BAW73NA - Jul 15, 13:55 UTCJul 15, 15:15 UTC1h 20m
2026-07-15 BAW335 NCE → LHR Jul 15, 10:30 UTCJul 15, 12:15 UTC1h 45m

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

Mode-S 407D74 frequently asked

What is Mode-S code 407D74?
407D74 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-TTNT.
Where is Mode-S 407D74 registered?
Mode-S code 407D74 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 407D74 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407D74, octal 20076564, decimal 4,226,420.
What flights does 407D74 operate?
Mode-S 407D74 has broadcast 20 distinct callsigns, including BAW398, BAW521, BAW520R, BAW399, BAW709.