Apparatus

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sensors Mode-S transponder

801849

ICAO 24-bit transponder address · allocated to India

Currently assigned to VT-GSQ · EMBRAER ERJ-170-100

Hex
801849
Octal
40014111
Decimal
8,394,825
Country
IN
Tail
VT-GSQ
Type
E170
No current signal · last broadcast 15h ago
Flights observed
9
Distinct callsigns
4
Country
IN
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 801849.

Country allocation

The ICAO 24-bit address 801849 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 4 distinct

Callsign Airline Flights Last seen
SDG621 - 3 2026-04-14
SDG620 - 2 2026-04-14
SDG619 - 2 2026-04-13
SDG618 - 2 2026-04-14

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-04-14 SDG620 - Apr 14, 09:10 UTCApr 14, 09:40 UTC30m
2026-04-14 SDG621 - Apr 14, 07:30 UTCApr 14, 08:05 UTC35m
2026-04-14 SDG618 - Apr 14, 06:00 UTCApr 14, 06:25 UTC25m
2026-04-13 SDG619 - Apr 13, 12:20 UTCApr 13, 12:45 UTC25m
2026-04-13 SDG619 - Apr 13, 12:00 UTCApr 13, 12:45 UTC45m
2026-04-13 SDG620 - Apr 13, 09:10 UTCApr 13, 09:40 UTC30m
2026-04-13 SDG621 - Apr 13, 07:55 UTCApr 13, 08:05 UTC10m
2026-04-13 SDG621 - Apr 13, 07:25 UTCApr 13, 08:05 UTC40m
2026-04-13 SDG618 - Apr 13, 06:10 UTCApr 13, 06:30 UTC20m

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

Mode-S 801849 frequently asked

What is Mode-S code 801849?
801849 is an ICAO 24-bit transponder address. Allocated to India. Assigned to VT-GSQ.
Where is Mode-S 801849 registered?
Mode-S code 801849 is allocated to India (IN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 801849 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 801849, octal 40014111, decimal 8,394,825.
What flights does 801849 operate?
Mode-S 801849 has broadcast 4 distinct callsigns, including SDG621, SDG620, SDG619, SDG618.