Apparatus

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sensors Mode-S transponder

40797A

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-ZBLD · BOEING 787-10 Dreamliner

Hex
40797A
Octal
20074572
Decimal
4,225,402
Country
GB
Tail
G-ZBLD
Type
B78X
No current signal · last broadcast 2d ago
Flights observed
88
Distinct callsigns
20
Country
GB
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 40797A.

Country allocation

The ICAO 24-bit address 40797A 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
BAW9ZY British Airways 7 2026-05-05
BAW74X British Airways 6 2026-06-06
BAW5CA British Airways 6 2026-05-05
BAW2PD British Airways 6 2026-06-08
BAW20R British Airways 6 2026-06-08
BAW99 British Airways 5 2026-06-09
BAW98T British Airways 4 2026-06-10
BAW49N British Airways 4 2026-06-06
BAW37J British Airways 4 2026-05-21
BAW189 British Airways 4 2026-06-05
BAW8K British Airways 3 2026-05-18
BAW4EA British Airways 3 2026-06-02
BAW299 British Airways 3 2026-05-19
BAW298 British Airways 3 2026-05-20
BAW193 British Airways 3 2026-05-17
BAW18A British Airways 3 2026-05-22
BAW7CP British Airways 2 2026-05-28
BAW75X British Airways 2 2026-05-09
BAW71K British Airways 2 2026-06-04
BAW6AC British Airways 2 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-10 BAW98T YYZ → LHR Jun 10, 04:15 UTCJun 10, 10:35 UTC6h 20m
2026-06-09 BAW99 LHR → YYZ Jun 9, 21:00 UTCJun 10, 01:50 UTC4h 50m
2026-06-08 BAW20R ORD → LHR Jun 8, 23:35 UTCJun 9, 07:00 UTC7h 25m
2026-06-08 BAW2PD LHR → ORD Jun 8, 11:10 UTCJun 8, 18:50 UTC7h 40m
2026-06-07 BAW20R ORD → LHR Jun 7, 23:05 UTCJun 8, 06:20 UTC7h 15m
2026-06-07 BAW2PD LHR → ORD Jun 7, 10:30 UTCJun 7, 17:55 UTC7h 25m
2026-06-06 BAW74X LOS → LHR Jun 6, 11:25 UTCJun 7, 04:10 UTC16h 45m
2026-06-06 BAW49N EWR → LHR Jun 6, 01:35 UTCJun 6, 08:05 UTC6h 30m
2026-06-05 BAW189 LHR → EWR Jun 5, 16:05 UTCJun 5, 22:55 UTC6h 50m
2026-06-05 BAW26V PDX → LHR Jun 5, 04:20 UTCJun 5, 13:20 UTC9h 0m
2026-06-04 BAW71K LHR → PDX Jun 4, 16:50 UTCJun 5, 02:00 UTC9h 10m
2026-06-03 BAW20R ORD → LHR Jun 3, 22:25 UTCJun 4, 05:35 UTC7h 10m
2026-06-03 BAW2PD LHR → ORD Jun 3, 10:40 UTCJun 3, 18:25 UTC7h 45m
2026-06-02 BAW4EA SEA → LHR Jun 2, 21:35 UTCJun 3, 06:10 UTC8h 35m
2026-06-02 BAW5WB LHR → SEA Jun 2, 10:05 UTCJun 2, 19:10 UTC9h 5m
2026-06-01 BAW20R ORD → LHR Jun 1, 22:55 UTCJun 2, 06:10 UTC7h 15m
2026-06-01 BAW2PD LHR → ORD Jun 1, 10:50 UTCJun 1, 18:05 UTC7h 15m
2026-06-01 BAW49N EWR → LHR Jun 1, 01:40 UTCJun 1, 07:50 UTC6h 10m
2026-05-31 BAW189 LHR → EWR May 31, 16:15 UTCMay 31, 23:20 UTC7h 5m
2026-05-31 BAW26V PDX → LHR May 31, 09:05 UTCMay 31, 11:45 UTC2h 40m
2026-05-30 BAW71K LHR → PDX May 30, 15:15 UTCMay 31, 00:30 UTC9h 15m
2026-05-30 BAW224U MSY → LHR May 30, 03:35 UTCMay 30, 11:35 UTC8h 0m
2026-05-29 BAW225Y LHR → MSY May 29, 15:40 UTCMay 30, 00:35 UTC8h 55m
2026-05-29 BAW6AC ORD → LHR May 29, 03:15 UTCMay 29, 10:55 UTC7h 40m
2026-05-28 BAW7CP LHR → ORD May 28, 15:10 UTCMay 28, 22:35 UTC7h 25m
2026-05-28 BAW6AC ORD → LHR May 28, 02:35 UTCMay 28, 10:00 UTC7h 25m
2026-05-27 BAW7CP LHR → ORD May 27, 14:45 UTCMay 27, 22:25 UTC7h 40m
2026-05-27 BAW98T YYZ → LHR May 27, 02:14 UTCMay 27, 08:50 UTC6h 36m
2026-05-26 BAW99 LHR → YYZ May 26, 22:29 UTCMay 27, 00:04 UTC1h 35m
2026-05-26 BAW99 LHR → YYZ May 26, 17:04 UTCMay 26, 22:25 UTC5h 20m
2026-05-25 BAW20R ORD → LHR May 25, 22:49 UTCMay 26, 05:49 UTC7h 0m
2026-05-25 BAW2PD LHR → ORD May 25, 10:40 UTCMay 25, 18:40 UTC8h 0m
2026-05-22 BAW18A JFK → LHR May 22, 03:05 UTCMay 22, 09:00 UTC5h 55m
2026-05-21 BAW37J LHR → JFK May 21, 17:15 UTCMay 22, 00:15 UTC7h 0m
2026-05-20 BAW74X LOS → LHR May 20, 11:50 UTCMay 21, 04:20 UTC16h 30m
2026-05-20 BAW298 ORD → LHR May 20, 00:40 UTCMay 20, 07:40 UTC7h 1m
2026-05-19 BAW299 LHR → ORD May 19, 12:45 UTCMay 19, 20:45 UTC8h 0m
2026-05-19 BAW298 ORD → LHR May 19, 01:00 UTCMay 19, 08:00 UTC7h 0m
2026-05-18 BAW299 LHR → ORD May 18, 13:20 UTCMay 18, 21:25 UTC8h 4m
2026-05-18 BAW8K DFW → LHR May 18, 01:45 UTCMay 18, 10:15 UTC8h 30m
2026-05-17 BAW193 LHR → DFW May 17, 12:25 UTCMay 17, 21:55 UTC9h 30m
2026-05-17 BAW98T YYZ → LHR May 17, 02:30 UTCMay 17, 08:50 UTC6h 20m
2026-05-16 BAW99 LHR → YYZ May 16, 17:10 UTCMay 17, 00:15 UTC7h 5m
2026-05-15 BAW4EA SEA → LHR May 15, 21:10 UTCMay 16, 05:40 UTC8h 30m
2026-05-15 BAW53 LHR → SEA May 15, 09:40 UTCMay 15, 18:45 UTC9h 4m
2026-05-14 BAW4EA SEA → LHR May 14, 20:45 UTCMay 15, 05:35 UTC8h 50m
2026-05-14 BAW53 LHR → SEA May 14, 09:20 UTCMay 14, 18:40 UTC9h 20m
2026-05-13 BAW74X LOS → LHR May 13, 13:10 UTCMay 14, 04:25 UTC15h 15m
2026-05-12 BAW298 ORD → LHR May 12, 02:50 UTCMay 12, 07:55 UTC5h 5m
2026-05-11 BAW299 LHR → ORD May 11, 12:35 UTCMay 11, 20:40 UTC8h 6m

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

Mode-S 40797A frequently asked

What is Mode-S code 40797A?
40797A is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-ZBLD.
Where is Mode-S 40797A registered?
Mode-S code 40797A 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 40797A broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40797A, octal 20074572, decimal 4,225,402.
What flights does 40797A operate?
Mode-S 40797A has broadcast 20 distinct callsigns, including BAW9ZY, BAW74X, BAW5CA, BAW2PD, BAW20R.