Apparatus

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sensors Mode-S transponder

4A08E9

ICAO 24-bit transponder address · allocated to Romania

Currently assigned to YR-BGI · BOEING 737-700

Hex
4A08E9
Octal
22404351
Decimal
4,851,945
Country
RO
Tail
YR-BGI
Type
B737
No current signal · last broadcast Jul 26, 20:00 UTC
Flights observed
644
Distinct callsigns
20
Country
RO
Last broadcast
Jul 26, 20:00 UTC

Last known position

Most recent position reported by Mode-S 4A08E9.

Country allocation

The ICAO 24-bit address 4A08E9 falls within the block assigned to Romania (RO) by ICAO Annex 10, Volume III. Every aircraft registered in Romania 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
ROT374W Tarom 49 2026-07-26
ROT373D Tarom 49 2026-07-26
ROT383X Tarom 32 2026-07-25
ROT384J Tarom 31 2026-07-25
ROT641X Tarom 25 2026-07-23
ROT642V Tarom 24 2026-07-23
ROT361U - 22 2026-07-05
ROT362Q - 21 2026-07-05
ROT302R Tarom 18 2026-07-25
ROT301V Tarom 18 2026-07-25
ROT188 - 16 2026-07-03
ROT187 - 16 2026-07-02
ROT404R - 15 2026-07-22
ROT403G - 15 2026-07-15
ROT372H Tarom 15 2026-07-20
ROT371Q Tarom 15 2026-07-20
ROT402D Tarom 14 2026-07-26
ROT401Z Tarom 14 2026-07-26
ROT168Q Tarom 13 2026-07-26
ROT167H Tarom 13 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ROT374W BRU → OTP Jul 26, 17:50 UTCJul 26, 20:00 UTC2h 10m
2026-07-26 ROT373D OTP → BRU Jul 26, 14:10 UTCJul 26, 16:40 UTC2h 30m
2026-07-26 ROT402D NCE → OTP Jul 26, 10:45 UTCJul 26, 12:45 UTC2h 0m
2026-07-26 ROT401Z OTP → NCE Jul 26, 06:55 UTCJul 26, 09:20 UTC2h 25m
2026-07-26 ROT168Q BEY → OTP Jul 26, 01:40 UTCJul 26, 03:05 UTC1h 25m
2026-07-25 ROT167H OTP → BEY Jul 25, 22:20 UTCJul 26, 00:05 UTC1h 45m
2026-07-25 ROT384J CDG → OTP Jul 25, 18:00 UTCJul 25, 20:20 UTC2h 20m
2026-07-25 ROT383X OTP → CDG Jul 25, 13:30 UTCJul 25, 16:10 UTC2h 40m
2026-07-25 ROT302R FRA → OTP Jul 25, 09:40 UTCJul 25, 11:35 UTC1h 55m
2026-07-25 ROT301V OTP → FRA Jul 25, 05:55 UTCJul 25, 08:00 UTC2h 5m
2026-07-25 ROT168Q BEY → OTP Jul 25, 01:55 UTCJul 25, 03:35 UTC1h 40m
2026-07-24 ROT167H OTP → BEY Jul 24, 22:50 UTCJul 25, 00:40 UTC1h 50m
2026-07-24 ROT306J FRA → OTP Jul 24, 18:00 UTCJul 24, 19:55 UTC1h 55m
2026-07-24 ROT305Z OTP → FRA Jul 24, 14:35 UTCJul 24, 16:40 UTC2h 5m
2026-07-24 ROT276H SKG → OTP Jul 24, 11:50 UTCJul 24, 12:40 UTC50m
2026-07-24 ROT275B - Jul 24, 09:55 UTCJul 24, 10:55 UTC1h 0m
2026-07-24 ROT262R IST → OTP Jul 24, 08:00 UTCJul 24, 08:45 UTC45m
2026-07-24 ROT261N OTP → IST Jul 24, 05:50 UTCJul 24, 06:45 UTC55m
2026-07-24 ROT168Q BEY → OTP Jul 24, 01:30 UTCJul 24, 03:30 UTC2h 0m
2026-07-23 ROT167H OTP → BEY Jul 23, 22:50 UTCJul 24, 00:35 UTC1h 45m
2026-07-23 ROT374W BRU → OTP Jul 23, 17:25 UTCJul 23, 19:45 UTC2h 20m
2026-07-23 ROT373D - Jul 23, 13:45 UTCJul 23, 16:10 UTC2h 25m
2026-07-23 ROT402D NCE → OTP Jul 23, 10:50 UTCJul 23, 12:40 UTC1h 50m
2026-07-23 ROT401Z OTP → NCE Jul 23, 07:25 UTCJul 23, 09:45 UTC2h 20m
2026-07-23 ROT642V CLJ → OTP Jul 23, 05:10 UTCJul 23, 05:45 UTC35m
2026-07-23 ROT641X OTP → CLJ Jul 23, 03:45 UTCJul 23, 04:15 UTC30m
2026-07-22 ROT374W BRU → OTP Jul 22, 17:45 UTCJul 22, 19:55 UTC2h 10m
2026-07-22 ROT373D - Jul 22, 14:10 UTCJul 22, 16:35 UTC2h 25m
2026-07-22 ROT404R - Jul 22, 11:20 UTCJul 22, 12:45 UTC1h 25m
2026-07-22 ROT641X OTP → CLJ Jul 22, 05:00 UTCJul 22, 05:25 UTC25m
2026-07-22 ROT168Q BEY → OTP Jul 22, 02:00 UTCJul 22, 03:45 UTC1h 45m
2026-07-21 ROT167H OTP → BEY Jul 21, 22:55 UTCJul 22, 00:45 UTC1h 50m
2026-07-21 ROT274K ATH → OTP Jul 21, 18:15 UTCJul 21, 19:25 UTC1h 10m
2026-07-21 ROT273L OTP → ATH Jul 21, 15:40 UTCJul 21, 16:55 UTC1h 15m
2026-07-21 ROT3456 - Jul 21, 13:10 UTCJul 21, 13:45 UTC35m
2026-07-21 ROT3455 - Jul 21, 12:00 UTCJul 21, 12:20 UTC20m
2026-07-21 ROT3455 - Jul 21, 10:15 UTCJul 21, 10:30 UTC15m
2026-07-21 ROT262R IST → OTP Jul 21, 07:45 UTCJul 21, 08:35 UTC50m
2026-07-21 ROT261N OTP → IST Jul 21, 05:25 UTCJul 21, 06:20 UTC55m
2026-07-20 ROT384J CDG → OTP Jul 20, 18:05 UTCJul 20, 20:20 UTC2h 15m
2026-07-20 ROT383X - Jul 20, 13:55 UTCJul 20, 16:40 UTC2h 45m
2026-07-20 ROT372H BRU → OTP Jul 20, 09:45 UTCJul 20, 11:55 UTC2h 10m
2026-07-20 ROT371Q OTP → BRU Jul 20, 06:10 UTCJul 20, 08:35 UTC2h 25m
2026-07-20 ROT168Q BEY → OTP Jul 20, 03:15 UTCJul 20, 05:10 UTC1h 55m
2026-07-20 ROT167H OTP → BEY Jul 20, 00:30 UTCJul 20, 02:10 UTC1h 40m
2026-07-19 ROT374W BRU → OTP Jul 19, 18:30 UTCJul 19, 20:45 UTC2h 15m
2026-07-19 ROT373D OTP → BRU Jul 19, 14:30 UTCJul 19, 17:05 UTC2h 35m
2026-07-19 ROT402D NCE → OTP Jul 19, 10:40 UTCJul 19, 12:35 UTC1h 55m
2026-07-19 ROT401Z OTP → NCE Jul 19, 06:55 UTCJul 19, 09:20 UTC2h 25m
2026-07-19 ROT168Q BEY → OTP Jul 19, 02:20 UTCJul 19, 03:55 UTC1h 35m

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 YR-BGI page for operator, model, and routing details .

Mode-S 4A08E9 frequently asked

What is Mode-S code 4A08E9?
4A08E9 is an ICAO 24-bit transponder address. Allocated to Romania. Assigned to YR-BGI.
Where is Mode-S 4A08E9 registered?
Mode-S code 4A08E9 is allocated to Romania (RO). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4A08E9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4A08E9, octal 22404351, decimal 4,851,945.
What flights does 4A08E9 operate?
Mode-S 4A08E9 has broadcast 20 distinct callsigns, including ROT374W, ROT373D, ROT383X, ROT384J, ROT641X.