Apparatus

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sensors Mode-S transponder

801873

ICAO 24-bit transponder address · allocated to India

Hex
801873
Octal
40014163
Decimal
8,394,867
Country
IN
Broadcasting now · callsign VTBOB · 3,600 ft
Flights observed
51
Distinct callsigns
1
Country
IN
Last broadcast
Jul 23, 03:35 UTC

Current position

801873 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 801873 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 1 distinct

Callsign Airline Flights Last seen
VTBOB - 51 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 VTBOB - Jul 23, 02:45 UTCJul 23, 03:35 UTC50m
2026-07-21 VTBOB - Jul 21, 17:05 UTCJul 21, 17:25 UTC20m
2026-07-21 VTBOB - Jul 21, 16:05 UTCJul 21, 16:20 UTC15m
2026-07-21 VTBOB - Jul 21, 14:00 UTCJul 21, 14:50 UTC50m
2026-07-21 VTBOB - Jul 21, 12:00 UTCJul 21, 12:10 UTC10m
2026-07-20 VTBOB - Jul 20, 09:00 UTCJul 20, 09:30 UTC30m
2026-07-20 VTBOB - Jul 20, 05:50 UTCJul 20, 06:20 UTC30m
2026-07-16 VTBOB - Jul 16, 08:15 UTCJul 16, 08:40 UTC25m
2026-07-14 VTBOB - Jul 14, 08:55 UTCJul 14, 09:35 UTC40m
2026-07-11 VTBOB - Jul 11, 07:35 UTCJul 11, 07:40 UTC5m
2026-07-11 VTBOB - Jul 11, 06:01 UTCJul 11, 06:05 UTC5m
2026-07-11 VTBOB - Jul 11, 02:35 UTCJul 11, 02:45 UTC10m
2026-07-10 VTBOB - Jul 10, 12:45 UTCJul 10, 12:50 UTC5m
2026-07-10 VTBOB - Jul 10, 10:10 UTCJul 10, 10:40 UTC30m
2026-07-05 VTBOB - Jul 5, 05:15 UTCJul 5, 05:55 UTC40m
2026-06-21 VTBOB - Jun 21, 11:15 UTCJun 21, 11:44 UTC30m
2026-06-21 VTBOB - Jun 21, 09:24 UTCJun 21, 09:49 UTC25m
2026-06-21 VTBOB - Jun 21, 05:00 UTCJun 21, 05:10 UTC10m
2026-06-20 VTBOB - Jun 20, 03:44 UTCJun 20, 03:54 UTC10m
2026-06-20 VTBOB - Jun 20, 03:04 UTCJun 20, 03:14 UTC10m
2026-06-20 VTBOB - Jun 20, 01:29 UTCJun 20, 01:39 UTC10m
2026-06-18 VTBOB - Jun 18, 05:50 UTCJun 18, 06:45 UTC55m
2026-06-11 VTBOB - Jun 11, 08:45 UTCJun 11, 09:10 UTC25m
2026-06-11 VTBOB - Jun 11, 05:45 UTCJun 11, 06:10 UTC25m
2026-06-09 VTBOB - Jun 9, 09:30 UTCJun 9, 10:15 UTC45m
2026-06-09 VTBOB - Jun 9, 05:20 UTCJun 9, 05:50 UTC30m
2026-06-05 VTBOB - Jun 5, 12:55 UTCJun 5, 13:00 UTC5m
2026-06-05 VTBOB - Jun 5, 06:40 UTCJun 5, 06:55 UTC15m
2026-05-27 VTBOB - May 27, 08:35 UTCMay 27, 08:55 UTC20m
2026-05-27 VTBOB - May 27, 04:49 UTCMay 27, 05:09 UTC20m
2026-05-26 VTBOB - May 26, 12:14 UTCMay 26, 12:45 UTC30m
2026-05-26 VTBOB - May 26, 07:19 UTCMay 26, 07:29 UTC10m
2026-05-26 VTBOB - May 26, 05:59 UTCMay 26, 06:10 UTC10m
2026-05-25 VTBOB - May 25, 09:10 UTCMay 25, 09:25 UTC15m
2026-05-24 VTBOB - May 24, 09:10 UTCMay 24, 09:30 UTC20m
2026-05-21 VTBOB - May 21, 08:15 UTCMay 21, 08:40 UTC25m
2026-05-21 VTBOB - May 21, 01:35 UTCMay 21, 02:00 UTC25m
2026-05-07 VTBOB - May 7, 08:45 UTCMay 7, 09:20 UTC35m
2026-05-07 VTBOB - May 7, 04:10 UTCMay 7, 04:30 UTC20m
2026-04-29 VTBOB - Apr 29, 11:10 UTCApr 29, 11:25 UTC15m
2026-04-29 VTBOB - Apr 29, 07:10 UTCApr 29, 07:35 UTC25m
2026-04-23 VTBOB - Apr 23, 08:01 UTCApr 23, 08:25 UTC25m
2026-04-23 VTBOB - Apr 23, 03:45 UTCApr 23, 03:55 UTC10m
2026-04-22 VTBOB - Apr 22, 11:55 UTCApr 22, 12:00 UTC5m
2026-04-22 VTBOB - Apr 22, 10:50 UTCApr 22, 11:10 UTC20m
2026-04-22 VTBOB - Apr 22, 09:25 UTCApr 22, 09:40 UTC15m
2026-04-21 VTBOB - Apr 21, 14:15 UTCApr 21, 14:55 UTC40m
2026-04-21 VTBOB - Apr 21, 13:10 UTCApr 21, 13:25 UTC15m
2026-04-21 VTBOB - Apr 21, 10:40 UTCApr 21, 10:55 UTC15m
2026-04-17 VTBOB - Apr 17, 08:05 UTCApr 17, 08:20 UTC15m

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 801873 frequently asked

What is Mode-S code 801873?
801873 is an ICAO 24-bit transponder address. Allocated to India.
Where is Mode-S 801873 registered?
Mode-S code 801873 is allocated to India (IN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 801873 broadcasting right now?
Yes. Mode-S 801873 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 801873, octal 40014163, decimal 8,394,867.
What flights does 801873 operate?
Mode-S 801873 has broadcast 1 distinct callsign, including VTBOB.