Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

801903

ICAO 24-bit transponder address · allocated to India

Hex
801903
Octal
40014403
Decimal
8,395,011
Country
IN
No current signal · last broadcast 8d ago
Flights observed
195
Distinct callsigns
20
Country
IN
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S 801903.

Country allocation

The ICAO 24-bit address 801903 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
IGO6921 IndiGo Airlines 6 2026-07-22
IGO429 - 6 2026-07-14
IGO6135 IndiGo Airlines 5 2026-07-22
IGO6134 IndiGo Airlines 5 2026-07-22
IGO355H - 5 2026-07-14
IGO173V - 5 2026-07-22
IGO6382 - 4 2026-07-07
IGO5264 - 4 2026-07-07
IGO509K IndiGo Airlines 4 2026-07-25
IGO993E - 3 2026-07-01
IGO757 IndiGo Airlines 3 2026-07-26
IGO6336 - 3 2026-07-01
IGO455 IndiGo Airlines 3 2026-07-25
IGO326 - 3 2026-07-11
IGO319P - 3 2026-07-08
IGO297M - 3 2026-07-01
IGO231H - 3 2026-07-26
IGO172 IndiGo Airlines 3 2026-07-26
IGO975 IndiGo Airlines 2 2026-07-26
IGO944 - 2 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 IGO975 BLR → CCU Jul 26, 15:05 UTCJul 26, 17:05 UTC2h 0m
2026-07-26 IGO757 CCU → BLR Jul 26, 11:40 UTCJul 26, 12:50 UTC1h 10m
2026-07-26 IGO172 BLR → CCU Jul 26, 09:10 UTCJul 26, 10:35 UTC1h 25m
2026-07-26 IGO172 BLR → CCU Jul 26, 08:25 UTCJul 26, 08:35 UTC10m
2026-07-26 IGO231H - Jul 26, 06:30 UTCJul 26, 06:45 UTC16m
2026-07-26 IGO231H - Jul 26, 04:40 UTCJul 26, 05:45 UTC1h 5m
2026-07-26 IGO6439 BLR → CCU Jul 26, 01:05 UTCJul 26, 03:15 UTC2h 10m
2026-07-25 IGO23EC AMD → BLR Jul 25, 15:55 UTCJul 25, 16:10 UTC15m
2026-07-25 IGO42RY - Jul 25, 11:30 UTCJul 25, 11:45 UTC15m
2026-07-25 IGO455 CCU → BLR Jul 25, 09:50 UTCJul 25, 10:10 UTC20m
2026-07-25 IGO455 CCU → BLR Jul 25, 08:05 UTCJul 25, 09:15 UTC1h 10m
2026-07-25 IGO503 BLR → CCU Jul 25, 04:35 UTCJul 25, 06:45 UTC2h 10m
2026-07-25 IGO509K DEL → MAA Jul 25, 02:40 UTCJul 25, 02:55 UTC15m
2026-07-25 IGO509K DEL → MAA Jul 25, 00:50 UTCJul 25, 02:00 UTC1h 10m
2026-07-24 IGO975 BLR → CCU Jul 24, 15:25 UTCJul 24, 17:30 UTC2h 5m
2026-07-24 IGO757 CCU → BLR Jul 24, 13:45 UTCJul 24, 14:05 UTC20m
2026-07-24 IGO757 CCU → BLR Jul 24, 12:00 UTCJul 24, 13:00 UTC1h 0m
2026-07-24 IGO172 BLR → CCU Jul 24, 08:25 UTCJul 24, 10:40 UTC2h 15m
2026-07-24 IGO231H - Jul 24, 04:50 UTCJul 24, 06:00 UTC1h 10m
2026-07-24 IGO6439 BLR → CCU Jul 24, 01:05 UTCJul 24, 03:15 UTC2h 10m
2026-07-23 IGO23EC AMD → BLR Jul 23, 15:55 UTCJul 23, 17:30 UTC1h 35m
2026-07-23 IGO42RY - Jul 23, 11:50 UTCJul 23, 12:05 UTC15m
2026-07-23 IGO455 CCU → BLR Jul 23, 10:05 UTCJul 23, 10:15 UTC10m
2026-07-23 IGO503 BLR → CCU Jul 23, 04:45 UTCJul 23, 05:00 UTC15m
2026-07-23 IGO509K DEL → MAA Jul 23, 02:50 UTCJul 23, 03:00 UTC10m
2026-07-23 IGO509K DEL → MAA Jul 23, 01:00 UTCJul 23, 02:05 UTC1h 5m
2026-07-22 IGO6921 PNQ → CCU Jul 22, 19:50 UTCJul 22, 20:35 UTC45m
2026-07-22 IGO6921 PNQ → CCU Jul 22, 18:25 UTCJul 22, 18:35 UTC10m
2026-07-22 IGO173V - Jul 22, 14:45 UTCJul 22, 15:25 UTC40m
2026-07-22 IGO6135 IXB → CCU Jul 22, 13:10 UTCJul 22, 13:50 UTC40m
2026-07-22 IGO6134 CCU → IXB Jul 22, 11:35 UTCJul 22, 11:55 UTC20m
2026-07-21 IGO126F CCU → CCU Jul 21, 23:45 UTCJul 22, 05:00 UTC5h 15m
2026-07-21 IGO6921 - Jul 21, 19:45 UTCJul 21, 20:30 UTC45m
2026-07-21 IGO173V - Jul 21, 14:55 UTCJul 21, 15:30 UTC35m
2026-07-21 IGO6135 IXB → CCU Jul 21, 13:10 UTCJul 21, 13:50 UTC40m
2026-07-21 IGO6134 CCU → IXB Jul 21, 11:15 UTCJul 21, 11:50 UTC35m
2026-07-21 IGO521C - Jul 21, 06:55 UTCJul 21, 07:55 UTC1h 0m
2026-07-21 IGO748 JAI → GAU Jul 21, 01:05 UTCJul 21, 02:55 UTC1h 50m
2026-07-20 IGO898 CCU → DEL Jul 20, 06:55 UTCJul 20, 07:50 UTC55m
2026-07-20 IGO6181 IXS → CCU Jul 20, 04:55 UTCJul 20, 05:15 UTC20m
2026-07-20 IGO782C - Jul 20, 02:40 UTCJul 20, 03:10 UTC30m
2026-07-19 IGO2133 - Jul 19, 17:35 UTCJul 19, 17:50 UTC15m
2026-07-19 IGO2133 - Jul 19, 16:45 UTCJul 19, 16:55 UTC10m
2026-07-19 IGO659 - Jul 19, 14:40 UTCJul 19, 14:55 UTC15m
2026-07-19 IGO726 - Jul 19, 11:25 UTCJul 19, 13:30 UTC2h 5m
2026-07-19 IGO725 - Jul 19, 06:20 UTCJul 19, 06:40 UTC20m
2026-07-19 IGO479 MAA → CJB Jul 19, 04:50 UTCJul 19, 05:10 UTC20m
2026-07-18 IGO24AH - Jul 18, 15:45 UTCJul 18, 22:55 UTC7h 10m
2026-07-18 IGO969K CCU → CCU Jul 18, 09:50 UTCJul 18, 14:45 UTC4h 55m
2026-07-18 IGO563 CCU → CCU Jul 18, 03:20 UTCJul 18, 08:20 UTC5h 0m

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.

Mode-S 801903 frequently asked

What is Mode-S code 801903?
801903 is an ICAO 24-bit transponder address. Allocated to India.
Where is Mode-S 801903 registered?
Mode-S code 801903 is allocated to India (IN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 801903 broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 801903, octal 40014403, decimal 8,395,011.
What flights does 801903 operate?
Mode-S 801903 has broadcast 20 distinct callsigns, including IGO6921, IGO429, IGO6135, IGO6134, IGO355H.