Apparatus

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sensors Mode-S transponder

801877

ICAO 24-bit transponder address · allocated to India

Currently assigned to VT-NTB · BOEING 737 MAX 8

Hex
801877
Octal
40014167
Decimal
8,394,871
Country
IN
Tail
VT-NTB
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
292
Distinct callsigns
20
Country
IN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 801877.

Country allocation

The ICAO 24-bit address 801877 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
AXB1238 - 16 2026-06-22
AXB1547 - 14 2026-06-19
AXB1241 Air India Express 11 2026-06-04
AXB1214 Air India Express 11 2026-06-06
AXB1237 - 10 2026-06-22
AXB1209 Air India Express 10 2026-06-04
AXB1176 - 10 2026-06-19
VTNTB - 8 2026-04-18
AXB2397 Air India Express 8 2026-06-29
AXB2368 Air India Express 8 2026-06-19
AXB940 - 7 2026-07-14
AXB2395 Air India Express 7 2026-06-29
AXB1671 Air India Express 6 2026-06-23
AXB2396 Air India Express 5 2026-06-29
AXB2648 - 4 2026-07-18
AXB2394 Air India Express 4 2026-06-29
AXB2393 Air India Express 4 2026-06-29
AXB1283 Air India Express 4 2026-06-07
AXB1243 Air India Express 4 2026-06-07
AXB1242 Air India Express 4 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 AXB2648 - Jul 18, 06:45 UTCJul 18, 07:05 UTC20m
2026-07-18 AXB2923 - Jul 18, 03:35 UTCJul 18, 04:00 UTC25m
2026-07-17 AXB2924 - Jul 17, 14:39 UTCJul 17, 15:00 UTC20m
2026-07-17 AXB2115 - Jul 17, 12:50 UTCJul 17, 13:35 UTC45m
2026-07-17 AXB2608 - Jul 17, 11:04 UTCJul 17, 11:50 UTC45m
2026-07-17 AXB558 - Jul 17, 09:45 UTCJul 17, 09:55 UTC10m
2026-07-16 AXB2018 - Jul 16, 00:50 UTCJul 16, 01:00 UTC10m
2026-07-15 AXB920 - Jul 15, 19:45 UTCJul 15, 23:30 UTC3h 45m
2026-07-15 AXB921 - Jul 15, 15:00 UTCJul 15, 18:25 UTC3h 25m
2026-07-15 AXB2718 - Jul 15, 10:20 UTCJul 15, 10:55 UTC35m
2026-07-15 AXB1971 - Jul 15, 07:40 UTCJul 15, 07:50 UTC10m
2026-07-15 AXB34H - Jul 15, 05:30 UTCJul 15, 05:45 UTC15m
2026-07-14 AXB952 - Jul 14, 21:00 UTCJul 14, 23:40 UTC2h 39m
2026-07-14 AXB940 - Jul 14, 04:05 UTCJul 14, 19:05 UTC15h 0m
2026-07-13 AXB972 - Jul 13, 08:10 UTCJul 14, 02:20 UTC18h 10m
2026-07-12 AXB971 - Jul 12, 20:10 UTCJul 13, 06:25 UTC10h 15m
2026-07-12 AXB951 - Jul 12, 14:50 UTCJul 12, 17:15 UTC2h 25m
2026-07-12 AXB2745 - Jul 12, 03:50 UTCJul 12, 04:10 UTC20m
2026-07-12 AXB2837 - Jul 12, 02:25 UTCJul 12, 02:50 UTC25m
2026-07-11 AXB952 - Jul 11, 20:35 UTCJul 11, 22:55 UTC2h 20m
2026-07-11 AXB940 - Jul 11, 00:50 UTCJul 11, 17:35 UTC16h 45m
2026-07-10 AXB939 - Jul 10, 10:30 UTCJul 11, 09:45 UTC23h 16m
2026-07-10 AXB939 - Jul 10, 08:55 UTCJul 11, 03:30 UTC18h 35m
2026-07-09 AXB971 - Jul 9, 11:55 UTCJul 10, 06:30 UTC18h 35m
2026-07-09 AXB940 - Jul 9, 09:50 UTCJul 10, 06:30 UTC20h 40m
2026-07-09 AXB940 - Jul 9, 04:25 UTCJul 9, 23:10 UTC18h 45m
2026-07-09 AXB940 - Jul 9, 02:20 UTCJul 9, 23:10 UTC20h 50m
2026-07-08 AXB940 - Jul 8, 22:00 UTCJul 9, 16:50 UTC18h 50m
2026-07-08 AXB940 - Jul 8, 20:30 UTCJul 9, 16:50 UTC20h 20m
2026-07-08 AXB951 - Jul 8, 14:30 UTCJul 8, 17:10 UTC2h 40m
2026-07-08 AXB2744 - Jul 8, 11:30 UTCJul 8, 11:45 UTC15m
2026-07-08 AXB2819 - Jul 8, 09:55 UTCJul 8, 10:15 UTC20m
2026-07-08 AXB2819 - Jul 8, 07:15 UTCJul 8, 07:25 UTC10m
2026-07-07 AXB932 - Jul 7, 20:50 UTCJul 8, 00:50 UTC4h 0m
2026-07-07 AXB931 - Jul 7, 18:45 UTCJul 7, 19:05 UTC20m
2026-07-07 AXB931 - Jul 7, 15:20 UTCJul 7, 16:50 UTC1h 30m
2026-07-07 AXB2648 - Jul 7, 06:45 UTCJul 7, 12:00 UTC5h 15m
2026-07-06 AXB942 - Jul 6, 16:10 UTCJul 7, 04:15 UTC12h 5m
2026-07-06 AXB2648 - Jul 6, 06:45 UTCJul 6, 11:55 UTC5h 10m
2026-07-06 AXB2923 - Jul 6, 03:30 UTCJul 6, 04:00 UTC30m
2026-07-04 AXB814 - Jul 4, 20:10 UTCJul 5, 09:25 UTC13h 15m
2026-07-04 AXB813 - Jul 4, 00:15 UTCJul 4, 18:20 UTC18h 5m
2026-07-03 AXB815 DXB → AUH Jul 3, 13:30 UTCJul 3, 22:15 UTC8h 45m
2026-07-02 AXB814 - Jul 2, 20:15 UTCJul 3, 11:45 UTC15h 30m
2026-07-02 AXB813 - Jul 2, 10:10 UTCJul 2, 18:35 UTC8h 25m
2026-07-02 AXB817 - Jul 2, 07:30 UTCJul 2, 07:55 UTC25m
2026-07-01 AXB2924 GOI → BLR Jul 1, 14:50 UTCJul 1, 15:05 UTC15m
2026-07-01 AXB2648 - Jul 1, 06:45 UTCJul 1, 12:00 UTC5h 15m
2026-07-01 AXB5087 - Jul 1, 03:30 UTCJul 1, 03:50 UTC20m
2026-06-30 AXB1219 - Jun 30, 15:30 UTCJun 30, 16:05 UTC35m

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

Mode-S 801877 frequently asked

What is Mode-S code 801877?
801877 is an ICAO 24-bit transponder address. Allocated to India. Assigned to VT-NTB.
Where is Mode-S 801877 registered?
Mode-S code 801877 is allocated to India (IN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 801877 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 801877, octal 40014167, decimal 8,394,871.
What flights does 801877 operate?
Mode-S 801877 has broadcast 20 distinct callsigns, including AXB1238, AXB1547, AXB1241, AXB1214, AXB1237.