Apparatus

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sensors Mode-S transponder

801861

ICAO 24-bit transponder address · allocated to India

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

Hex
801861
Octal
40014141
Decimal
8,394,849
Country
IN
Tail
VT-NHJ
Type
A21N
No current signal · last broadcast 4h ago
Flights observed
217
Distinct callsigns
20
Country
IN
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 801861.

Country allocation

The ICAO 24-bit address 801861 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
IGO6542 IndiGo Airlines 6 2026-04-30
IGO954W - 4 2026-05-28
IGO6774 IndiGo Airlines 4 2026-04-30
IGO455 IndiGo Airlines 4 2026-04-27
IGO23EC IndiGo Airlines 4 2026-04-27
IGO936J - 3 2026-05-19
IGO6707 IndiGo Airlines 3 2026-05-14
IGO6701 IndiGo Airlines 3 2026-05-19
IGO575F - 3 2026-05-21
IGO509K IndiGo Airlines 3 2026-04-27
IGO457 IndiGo Airlines 3 2026-04-29
IGO319P - 3 2026-05-21
IGO316 IndiGo Airlines 3 2026-04-30
IGO975 IndiGo Airlines 2 2026-04-26
IGO950H - 2 2026-05-30
IGO84CY - 2 2026-05-03
IGO738 IndiGo Airlines 2 2026-05-03
IGO701H - 2 2026-05-07
IGO6599 IndiGo Airlines 2 2026-05-21
IGO6543 IndiGo Airlines 2 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 IGO335 TRV → HYD May 30, 12:45 UTCMay 30, 13:40 UTC55m
2026-05-30 IGO624 BOM → TRV May 30, 10:40 UTCMay 30, 11:40 UTC1h 0m
2026-05-30 IGO950H - May 30, 08:10 UTCMay 30, 08:30 UTC20m
2026-05-30 IGO950H - May 30, 06:55 UTCMay 30, 07:30 UTC35m
2026-05-30 IGO5109 CJB → BOM May 30, 05:05 UTCMay 30, 05:30 UTC25m
2026-05-30 IGO5109 CJB → BOM May 30, 04:20 UTCMay 30, 04:30 UTC10m
2026-05-30 IGO5060 BDQ → BOM May 30, 02:35 UTCMay 30, 02:55 UTC20m
2026-05-30 IGO5059 BOM → CCU May 30, 00:25 UTCMay 30, 01:00 UTC35m
2026-05-29 IGO74AE AMD → BOM May 29, 19:50 UTCMay 29, 20:40 UTC50m
2026-05-29 IGO5152 BOM → GOX May 29, 18:00 UTCMay 29, 18:10 UTC10m
2026-05-29 IGO5133 NAG → BOM May 29, 16:30 UTCMay 29, 16:45 UTC15m
2026-05-29 IGO962K IXC → HYD May 29, 13:30 UTCMay 29, 13:50 UTC20m
2026-05-29 IGO318V - May 29, 11:50 UTCMay 29, 12:05 UTC15m
2026-05-29 IGO230 MAA → DEL May 29, 08:45 UTCMay 29, 09:00 UTC15m
2026-05-29 IGO452Y - May 29, 07:10 UTCMay 29, 07:25 UTC15m
2026-05-29 IGO452Y - May 29, 05:35 UTCMay 29, 05:55 UTC20m
2026-05-29 IGO6543 BOM → VNS May 29, 04:05 UTCMay 29, 04:15 UTC10m
2026-05-29 IGO6543 BOM → VNS May 29, 02:40 UTCMay 29, 02:50 UTC10m
2026-05-28 IGO1202 BAH → BOM May 28, 20:10 UTCMay 28, 23:25 UTC3h 15m
2026-05-28 IGO1201 BOM → BAH May 28, 15:30 UTCMay 28, 16:00 UTC30m
2026-05-28 IGO103Y JAI → GAU May 28, 12:35 UTCMay 28, 13:05 UTC30m
2026-05-28 IGO103Y JAI → GAU May 28, 11:25 UTCMay 28, 12:05 UTC40m
2026-05-28 IGO2016 DEL → ATQ May 28, 09:25 UTCMay 28, 10:00 UTC35m
2026-05-28 IGO2016 DEL → ATQ May 28, 08:45 UTCMay 28, 08:55 UTC10m
2026-05-28 IGO954W - May 28, 06:35 UTCMay 28, 07:05 UTC30m
2026-05-28 IGO954W - May 28, 05:15 UTCMay 28, 05:40 UTC25m
2026-05-28 IGO5303 BOM → MAA May 28, 00:30 UTCMay 28, 03:10 UTC2h 40m
2026-05-27 IGO5304 MAA → BOM May 27, 18:40 UTCMay 27, 19:20 UTC40m
2026-05-27 IGO246C DEL → ATQ May 27, 16:25 UTCMay 27, 17:05 UTC40m
2026-05-27 IGO2096 RDP → DEL May 27, 13:45 UTCMay 27, 15:20 UTC1h 35m
2026-05-27 IGO6513 CCU → HYD May 27, 04:14 UTCMay 27, 12:35 UTC8h 20m
2026-05-26 IGO626C - May 26, 14:45 UTCMay 26, 15:00 UTC15m
2026-05-25 IGO309F BBI → HYD May 25, 11:55 UTCMay 25, 14:20 UTC2h 25m
2026-05-24 IGO994P - May 24, 01:55 UTCMay 24, 16:50 UTC14h 55m
2026-05-23 IGO355H - May 23, 15:20 UTCMay 23, 17:40 UTC2h 20m
2026-05-23 IGO429 IXC → BLR May 23, 13:50 UTCMay 23, 14:10 UTC20m
2026-05-23 IGO429 IXC → BLR May 23, 11:35 UTCMay 23, 12:15 UTC40m
2026-05-22 IGO38E HYD → COK May 22, 16:05 UTCMay 23, 10:05 UTC17h 59m
2026-05-21 IGO6599 BOM → IDR May 21, 12:30 UTCMay 21, 12:45 UTC15m
2026-05-21 IGO319P - May 21, 10:25 UTCMay 21, 11:00 UTC35m
2026-05-21 IGO523C - May 21, 06:00 UTCMay 21, 06:20 UTC20m
2026-05-21 IGO642V - May 21, 04:05 UTCMay 21, 04:25 UTC20m
2026-05-21 IGO575F - May 21, 01:05 UTCMay 21, 01:15 UTC10m
2026-05-20 IGO575F - May 20, 23:35 UTCMay 21, 00:25 UTC50m
2026-05-20 IGO271J - May 20, 19:30 UTCMay 20, 20:10 UTC40m
2026-05-20 IGO445F - May 20, 15:45 UTCMay 20, 16:00 UTC15m
2026-05-20 IGO121J BHO → BOM May 20, 13:30 UTCMay 20, 13:45 UTC15m
2026-05-20 IGO687C BOM → BHO May 20, 10:45 UTCMay 20, 10:55 UTC10m
2026-05-20 IGO297E IXL → DEL May 20, 08:40 UTCMay 20, 09:15 UTC35m
2026-05-20 IGO261 AMD → BBI May 20, 06:25 UTCMay 20, 06:35 UTC10m

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

Mode-S 801861 frequently asked

What is Mode-S code 801861?
801861 is an ICAO 24-bit transponder address. Allocated to India. Assigned to VT-NHJ.
Where is Mode-S 801861 registered?
Mode-S code 801861 is allocated to India (IN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 801861 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 801861, octal 40014141, decimal 8,394,849.
What flights does 801861 operate?
Mode-S 801861 has broadcast 20 distinct callsigns, including IGO6542, IGO954W, IGO6774, IGO455, IGO23EC.