Apparatus

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sensors Mode-S transponder

801851

ICAO 24-bit transponder address · allocated to India

Currently assigned to VT-NMH · AIRBUS A-321neo

Hex
801851
Octal
40014121
Decimal
8,394,833
Country
IN
Tail
VT-NMH
Type
A21N
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
647
Distinct callsigns
20
Country
IN
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 801851.

Country allocation

The ICAO 24-bit address 801851 falls within the block assigned to India (IN) by ICAO Annex 10, Volume III. Every aircraft registered in India 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
IGO255K - 10 2026-06-12
IGO5294 - 8 2026-07-16
IGO451M IndiGo Airlines 8 2026-05-13
IGO817L - 7 2026-07-20
IGO38FL - 7 2026-05-13
IGO943Y - 6 2026-07-16
IGO6349 IndiGo Airlines 6 2026-06-12
IGO611H IndiGo Airlines 6 2026-06-12
IGO5388 - 6 2026-06-23
IGO5329 - 6 2026-06-23
IGO392M - 6 2026-05-13
IGO392F - 6 2026-07-16
IGO273Y IndiGo Airlines 6 2026-07-20
IGO142F - 6 2026-06-23
IGO121V - 6 2026-07-16
IGO1014 - 6 2026-07-09
IGO1013 - 6 2026-07-09
IGO646V - 5 2026-06-27
IGO6437 IndiGo Airlines 5 2026-07-23
IGO604H - 5 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 IGO478K DEL → HYD Jul 26, 17:55 UTCJul 26, 22:15 UTC4h 20m
2026-07-26 IGO13RC DEL → DEL Jul 26, 09:35 UTCJul 26, 14:30 UTC4h 55m
2026-07-26 IGO335L DEL → DEL Jul 26, 03:10 UTCJul 26, 08:25 UTC5h 16m
2026-07-25 IGO347H SAG → DEL Jul 25, 12:45 UTCJul 25, 17:50 UTC5h 5m
2026-07-25 IGO719F DEL → DEL Jul 25, 06:30 UTCJul 25, 11:15 UTC4h 45m
2026-07-24 IGO246Y - Jul 24, 15:50 UTCJul 24, 17:30 UTC1h 40m
2026-07-24 IGO27FH - Jul 24, 13:00 UTCJul 24, 13:35 UTC35m
2026-07-24 IGO2285 PNQ → DEL Jul 24, 10:00 UTCJul 24, 11:50 UTC1h 50m
2026-07-24 IGO2487 DEL → BLR Jul 24, 08:15 UTCJul 24, 08:30 UTC15m
2026-07-24 IGO2487 DEL → BLR Jul 24, 06:50 UTCJul 24, 07:25 UTC35m
2026-07-24 IGO2661 PNQ → DEL Jul 24, 03:40 UTCJul 24, 05:30 UTC1h 50m
2026-07-24 IGO234E DEL → PNQ Jul 24, 01:00 UTCJul 24, 01:35 UTC35m
2026-07-23 IGO245C PNQ → DEL Jul 23, 20:30 UTCJul 23, 22:15 UTC1h 45m
2026-07-23 IGO225K DEL → PNQ Jul 23, 17:40 UTCJul 23, 18:15 UTC35m
2026-07-23 IGO2126 PNQ → DEL Jul 23, 14:00 UTCJul 23, 15:45 UTC1h 45m
2026-07-23 IGO6437 DEL → GWL Jul 23, 11:10 UTCJul 23, 11:45 UTC35m
2026-07-23 IGO6431 BOM → HYD Jul 23, 07:35 UTCJul 23, 09:25 UTC1h 50m
2026-07-23 IGO2132 DEL → PNQ Jul 23, 04:25 UTCJul 23, 05:00 UTC35m
2026-07-23 IGO2419 PNQ → DEL Jul 23, 00:45 UTCJul 23, 01:25 UTC40m
2026-07-22 IGO2419 PNQ → DEL Jul 22, 23:45 UTCJul 22, 23:55 UTC10m
2026-07-22 IGO2343 DEL → PNQ Jul 22, 20:55 UTCJul 22, 21:25 UTC30m
2026-07-22 IGO246Y - Jul 22, 16:45 UTCJul 22, 17:50 UTC1h 5m
2026-07-22 IGO27FH - Jul 22, 12:55 UTCJul 22, 13:30 UTC35m
2026-07-22 IGO2285 - Jul 22, 10:20 UTCJul 22, 11:55 UTC1h 35m
2026-07-22 IGO2661 PNQ → DEL Jul 22, 03:20 UTCJul 22, 05:25 UTC2h 5m
2026-07-22 IGO234E DEL → PNQ Jul 22, 00:45 UTCJul 22, 01:15 UTC30m
2026-07-21 IGO245C PNQ → DEL Jul 21, 20:35 UTCJul 21, 22:25 UTC1h 50m
2026-07-21 IGO225K DEL → PNQ Jul 21, 17:35 UTCJul 21, 18:10 UTC35m
2026-07-21 IGO2126 PNQ → DEL Jul 21, 15:05 UTCJul 21, 15:55 UTC50m
2026-07-21 IGO2126 PNQ → DEL Jul 21, 14:05 UTCJul 21, 14:15 UTC10m
2026-07-21 IGO6437 - Jul 21, 11:20 UTCJul 21, 11:55 UTC35m
2026-07-21 IGO720F - Jul 21, 04:00 UTCJul 21, 06:30 UTC2h 30m
2026-07-21 IGO2314 DEL → DIB Jul 21, 00:25 UTCJul 21, 01:05 UTC40m
2026-07-20 IGO276P COK → BLR Jul 20, 18:05 UTCJul 20, 20:20 UTC2h 15m
2026-07-20 IGO817L - Jul 20, 16:25 UTCJul 20, 16:45 UTC20m
2026-07-20 IGO817L - Jul 20, 14:25 UTCJul 20, 15:05 UTC40m
2026-07-20 IGO472V - Jul 20, 12:55 UTCJul 20, 13:25 UTC30m
2026-07-20 IGO472V - Jul 20, 10:45 UTCJul 20, 11:05 UTC20m
2026-07-20 IGO376E NAG → CCU Jul 20, 07:30 UTCJul 20, 08:45 UTC1h 15m
2026-07-20 IGO273Y DEL → UDR Jul 20, 05:20 UTCJul 20, 05:55 UTC35m
2026-07-20 IGO273Y DEL → UDR Jul 20, 03:25 UTCJul 20, 04:05 UTC40m
2026-07-20 IGO493H BOM → CCU Jul 20, 00:10 UTCJul 20, 02:25 UTC2h 15m
2026-07-19 IGO352C - Jul 19, 18:55 UTCJul 19, 19:10 UTC15m
2026-07-19 IGO352C - Jul 19, 17:30 UTCJul 19, 18:10 UTC40m
2026-07-19 IGO727H - Jul 19, 14:20 UTCJul 19, 16:05 UTC1h 45m
2026-07-19 IGO471V - Jul 19, 12:15 UTCJul 19, 12:40 UTC25m
2026-07-19 IGO471V - Jul 19, 10:50 UTCJul 19, 11:20 UTC30m
2026-07-19 IGO615 BOM → DEL Jul 19, 07:35 UTCJul 19, 09:15 UTC1h 40m
2026-07-19 IGO6107 DEL → BOM Jul 19, 05:55 UTCJul 19, 06:05 UTC10m
2026-07-19 IGO6107 DEL → BOM Jul 19, 04:30 UTCJul 19, 05:00 UTC30m

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 VT-NMH page for operator, model, and routing details .

Mode-S 801851 frequently asked

What is Mode-S code 801851?
801851 is an ICAO 24-bit transponder address. Allocated to India. Assigned to VT-NMH.
Where is Mode-S 801851 registered?
Mode-S code 801851 is allocated to India (IN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 801851 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 801851, octal 40014121, decimal 8,394,833.
What flights does 801851 operate?
Mode-S 801851 has broadcast 20 distinct callsigns, including IGO255K, IGO5294, IGO451M, IGO817L, IGO38FL.