sensors Mode-S transponder

8003B1

ICAO 24-bit transponder address · allocated to India

Currently assigned to VT-AXM · BOEING 737-800

Hex
8003B1
Octal
40001661
Decimal
8,389,553
Country
IN
Tail
VT-AXM
Type
B738
No current signal · last broadcast 17h ago
Flights observed
5
Distinct callsigns
3
Country
IN
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 8003B1.

Country allocation

The ICAO 24-bit address 8003B1 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 3 distinct

Callsign Airline Flights Last seen
AXB6076 - 2 2026-04-13
AXB6075 - 2 2026-04-13
AXB1896 Air India Express 1 2026-04-14

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-14 AXB1896 COK → BLR Apr 14, 08:15 UTCApr 14, 09:00 UTC45m
2026-04-13 AXB6076 - Apr 13, 10:05 UTCApr 13, 10:15 UTC10m
2026-04-13 AXB6076 - Apr 13, 06:55 UTCApr 13, 07:15 UTC20m
2026-04-13 AXB6075 - Apr 13, 04:50 UTCApr 13, 05:10 UTC20m
2026-04-13 AXB6075 - Apr 13, 01:50 UTCApr 13, 02:05 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.

Prefer a tail-number view? See the VT-AXM page for operator, model, and routing details .

Mode-S 8003B1 frequently asked

What is Mode-S code 8003B1?
8003B1 is an ICAO 24-bit transponder address. Allocated to India. Assigned to VT-AXM.
Where is Mode-S 8003B1 registered?
Mode-S code 8003B1 is allocated to India (IN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8003B1 broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8003B1, octal 40001661, decimal 8,389,553.
What flights does 8003B1 operate?
Mode-S 8003B1 has broadcast 3 distinct callsigns, including AXB6076, AXB6075, AXB1896.