sensors Mode-S transponder

8004DD

ICAO 24-bit transponder address · allocated to India

Currently assigned to VT-ALO · BOEING 777-300ER

Hex
8004DD
Octal
40002335
Decimal
8,389,853
Country
IN
Tail
VT-ALO
Type
B77W
No current signal · last broadcast 5d ago
Flights observed
83
Distinct callsigns
18
Country
IN
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S 8004DD.

Country allocation

The ICAO 24-bit address 8004DD 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 18 distinct

Callsign Airline Flights Last seen
AIC4174 Air India 13 2026-05-19
AIC127 Air India 13 2026-04-27
AIC126 Air India 13 2026-04-27
AIC185 Air India 10 2026-05-16
AIC186 Air India 9 2026-05-16
AIC173 Air India 5 2026-05-17
AIC187 Air India 4 2026-05-22
AIC538 Air India 3 2026-05-21
AIC816 Air India 2 2026-04-16
AIC188 Air India 2 2026-05-22
AIC184 Air India 2 2026-04-22
VTALO - 1 2026-05-06
AIC441 Air India 1 2026-04-16
AIC4025 Air India 1 2026-05-24
AIC2026 Air India 1 2026-05-24
AIC185D Air India 1 2026-04-23
AIC183 Air India 1 2026-04-21
AIC173D Air India 1 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-24 AIC2026 FRA → DEL May 24, 14:00 UTCMay 24, 21:50 UTC7h 50m
2026-05-24 AIC4025 DEL → DXB May 24, 02:00 UTCMay 24, 11:50 UTC9h 50m
2026-05-22 AIC188 YYZ → DEL May 22, 20:30 UTCMay 23, 12:00 UTC15h 30m
2026-05-22 AIC187 DEL → YYZ May 22, 08:25 UTCMay 22, 16:55 UTC8h 30m
2026-05-21 AIC187 DEL → YYZ May 21, 21:45 UTCMay 22, 06:50 UTC9h 5m
2026-05-21 AIC538 BBI → MAA May 21, 11:40 UTCMay 21, 17:50 UTC6h 10m
2026-05-19 AIC4174 SFO → CCU May 19, 12:30 UTCMay 19, 14:15 UTC1h 45m
2026-05-18 AIC4174 SFO → CCU May 18, 23:10 UTCMay 19, 10:15 UTC11h 5m
2026-05-18 AIC4174 SFO → CCU May 18, 18:05 UTCMay 18, 23:05 UTC4h 59m
2026-05-17 AIC173 DEL → SFO May 17, 22:01 UTCMay 18, 13:30 UTC15h 30m
2026-05-16 AIC186 YVR → DEL May 16, 17:40 UTCMay 17, 09:55 UTC16h 15m
2026-05-16 AIC185 DEL → YVR May 16, 00:00 UTCMay 16, 14:55 UTC14h 56m
2026-05-15 AIC4174 SFO → CCU May 15, 13:20 UTCMay 15, 15:15 UTC1h 54m
2026-05-14 AIC4174 SFO → CCU May 14, 18:55 UTCMay 15, 11:35 UTC16h 40m
2026-05-14 AIC173 DEL → SFO May 14, 00:10 UTCMay 14, 15:35 UTC15h 25m
2026-05-13 AIC4174 SFO → CCU May 13, 12:10 UTCMay 13, 14:30 UTC2h 20m
2026-05-12 AIC4174 SFO → CCU May 12, 18:45 UTCMay 13, 10:50 UTC16h 5m
2026-05-12 AIC173 DEL → SFO May 12, 04:10 UTCMay 12, 13:51 UTC9h 40m
2026-05-10 AIC4174 SFO → CCU May 10, 19:09 UTCMay 10, 21:25 UTC2h 15m
2026-05-10 AIC4174 SFO → CCU May 10, 00:49 UTCMay 10, 17:25 UTC16h 35m
2026-05-09 AIC173D DEL → SFO May 9, 06:20 UTCMay 9, 21:30 UTC15h 10m
2026-05-08 AIC538 BBI → MAA May 8, 13:00 UTCMay 8, 19:20 UTC6h 20m
2026-05-07 AIC186 YVR → DEL May 7, 17:45 UTCMay 8, 10:44 UTC16h 59m
2026-05-06 AIC185 DEL → YVR May 6, 23:05 UTCMay 7, 13:55 UTC14h 50m
2026-05-06 VTALO DEL → DEL May 6, 01:40 UTCMay 6, 02:10 UTC30m
2026-05-05 AIC4174 SFO → CCU May 5, 12:05 UTCMay 5, 14:10 UTC2h 5m
2026-05-04 AIC4174 SFO → CCU May 4, 17:50 UTCMay 5, 09:35 UTC15h 46m
2026-05-03 AIC173 DEL → SFO May 3, 22:05 UTCMay 4, 13:45 UTC15h 40m
2026-05-03 AIC538 BBI → MAA May 3, 11:30 UTCMay 3, 18:45 UTC7h 15m
2026-05-01 AIC188 YYZ → DEL May 1, 18:35 UTCMay 2, 10:35 UTC16h 1m
2026-05-01 AIC187 DEL → YYZ May 1, 06:15 UTCMay 1, 14:40 UTC8h 25m
2026-04-30 AIC187 DEL → YYZ Apr 30, 19:20 UTCMay 1, 04:40 UTC9h 20m
2026-04-30 AIC4174 SFO → CCU Apr 30, 11:40 UTCApr 30, 13:50 UTC2h 10m
2026-04-29 AIC4174 SFO → CCU Apr 29, 17:50 UTCApr 30, 09:30 UTC15h 39m
2026-04-28 AIC173 DEL → SFO Apr 28, 22:20 UTCApr 29, 13:35 UTC15h 16m
2026-04-27 AIC126 ORD → DEL Apr 27, 20:10 UTCApr 28, 12:45 UTC16h 35m
2026-04-27 AIC127 DEL → ORD Apr 27, 07:25 UTCApr 27, 16:50 UTC9h 25m
2026-04-26 AIC127 DEL → ORD Apr 26, 20:20 UTCApr 27, 05:45 UTC9h 25m
2026-04-25 AIC186 YVR → DEL Apr 25, 17:40 UTCApr 26, 09:40 UTC16h 0m
2026-04-24 AIC185 DEL → YVR Apr 24, 23:15 UTCApr 25, 14:05 UTC14h 50m
2026-04-23 AIC186 YVR → DEL Apr 23, 19:05 UTCApr 24, 11:05 UTC16h 0m
2026-04-23 AIC185D DEL → YVR Apr 23, 01:25 UTCApr 23, 16:15 UTC14h 50m
2026-04-22 AIC184 SFO → DEL Apr 22, 20:10 UTCApr 22, 22:05 UTC1h 55m
2026-04-22 AIC184 SFO → DEL Apr 22, 02:00 UTCApr 22, 18:35 UTC16h 35m
2026-04-21 AIC183 DEL → SFO Apr 21, 05:45 UTCApr 21, 21:20 UTC15h 35m
2026-04-19 AIC186 YVR → DEL Apr 19, 17:35 UTCApr 20, 10:10 UTC16h 35m
2026-04-18 AIC185 DEL → YVR Apr 18, 23:20 UTCApr 19, 14:15 UTC14h 55m
2026-04-18 AIC126 ORD → DEL Apr 18, 05:25 UTCApr 18, 06:55 UTC1h 30m
2026-04-18 AIC126 ORD → DEL Apr 18, 04:45 UTCApr 18, 06:40 UTC1h 55m
2026-04-18 AIC126 ORD → DEL Apr 18, 03:25 UTCApr 18, 05:20 UTC1h 55m

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

Mode-S 8004DD frequently asked

What is Mode-S code 8004DD?
8004DD is an ICAO 24-bit transponder address. Allocated to India. Assigned to VT-ALO.
Where is Mode-S 8004DD registered?
Mode-S code 8004DD is allocated to India (IN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8004DD broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8004DD, octal 40002335, decimal 8,389,853.
What flights does 8004DD operate?
Mode-S 8004DD has broadcast 18 distinct callsigns, including AIC4174, AIC127, AIC126, AIC185, AIC186.