Apparatus

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sensors Mode-S transponder

504E84

ICAO 24-bit transponder address · allocated to Moldova

Currently assigned to ER-00001 · AIRBUS A-321

Hex
504E84
Octal
24047204
Decimal
5,262,980
Country
MD
Tail
ER-00001
Type
A321
Broadcasting now · callsign FIA5712 · 35,000 ft
Flights observed
299
Distinct callsigns
20
Country
MD
Last broadcast
8d ago

Current position

504E84 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 504E84 falls within the block assigned to Moldova (MD) by ICAO Annex 10, Volume III. Every aircraft registered in Moldova 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
FIA6320 Four Island Air 32 2026-07-24
FIA5711 Four Island Air 31 2026-07-26
FIA5712 Four Island Air 30 2026-07-25
FIA6319 Four Island Air 27 2026-07-25
FIA6311 Four Island Air 14 2026-07-24
FIA6312 Four Island Air 13 2026-07-24
FIA5902 Four Island Air 11 2026-07-22
FIA5812 - 11 2026-07-11
FIA5811 - 11 2026-07-11
FIA5901 Four Island Air 10 2026-07-24
FIA5835 Four Island Air 8 2026-07-26
FIA5326 - 8 2026-07-10
FIA5738 Four Island Air 7 2026-07-25
FIA5737 Four Island Air 7 2026-07-25
FIA5325 - 7 2026-07-10
FIA5836 Four Island Air 6 2026-07-26
FIA5618 - 5 2026-07-17
FIA5617 - 5 2026-07-17
FIA5638 - 4 2026-07-01
FIA5637 - 4 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FIA5711 RMO → DUB Jul 26, 17:40 UTCJul 26, 21:35 UTC3h 55m
2026-07-26 FIA5836 BRU → RMO Jul 26, 13:10 UTCJul 26, 15:15 UTC2h 5m
2026-07-26 FIA5835 RMO → BRU Jul 26, 09:25 UTCJul 26, 11:50 UTC2h 25m
2026-07-25 FIA5712 DUB → RMO Jul 25, 23:10 UTCJul 26, 02:05 UTC2h 55m
2026-07-25 FIA5711 RMO → DUB Jul 25, 18:10 UTCJul 25, 21:35 UTC3h 25m
2026-07-25 FIA5738 AMS → RMO Jul 25, 14:15 UTCJul 25, 16:20 UTC2h 5m
2026-07-25 FIA5737 RMO → AMS Jul 25, 06:50 UTCJul 25, 12:05 UTC5h 15m
2026-07-25 FIA6319 RMO → AYT Jul 25, 00:15 UTCJul 25, 05:10 UTC4h 55m
2026-07-24 FIA6311 RMO → AYT Jul 24, 22:35 UTCJul 24, 23:05 UTC30m
2026-07-24 FIA5901 RMO → CDG Jul 24, 10:15 UTCJul 24, 12:10 UTC1h 55m
2026-07-24 FIA6320 AYT → RMO Jul 24, 06:35 UTCJul 24, 07:55 UTC1h 20m
2026-07-24 FIA6319 RMO → AYT Jul 24, 03:30 UTCJul 24, 05:10 UTC1h 40m
2026-07-24 FIA6312 AYT → RMO Jul 24, 00:30 UTCJul 24, 01:50 UTC1h 20m
2026-07-23 FIA6311 RMO → AYT Jul 23, 22:30 UTCJul 23, 23:20 UTC50m
2026-07-23 FIA5908 - Jul 23, 14:35 UTCJul 23, 16:35 UTC2h 0m
2026-07-23 FIA5907 - Jul 23, 10:35 UTCJul 23, 12:15 UTC1h 40m
2026-07-23 FIA6312 - Jul 23, 05:50 UTCJul 23, 07:10 UTC1h 20m
2026-07-22 FIA5904 NCE → RMO Jul 22, 19:45 UTCJul 23, 04:25 UTC8h 40m
2026-07-22 FIA5903 RMO → NCE Jul 22, 18:35 UTCJul 22, 18:45 UTC10m
2026-07-22 FIA5903 RMO → NCE Jul 22, 15:55 UTCJul 22, 18:20 UTC2h 25m
2026-07-22 FIA5902 CDG → RMO Jul 22, 12:15 UTCJul 22, 14:25 UTC2h 10m
2026-07-22 FIA6312 - Jul 22, 00:00 UTCJul 22, 10:25 UTC10h 25m
2026-07-21 FIA6311 - Jul 21, 21:20 UTCJul 21, 22:45 UTC1h 25m
2026-07-21 FIA5510 TLV → RMO Jul 21, 16:50 UTCJul 21, 19:05 UTC2h 15m
2026-07-21 FIA5509 RMO → TLV Jul 21, 13:25 UTCJul 21, 15:15 UTC1h 50m
2026-07-21 FIA5814 ALC → RMO Jul 21, 08:20 UTCJul 21, 11:20 UTC3h 0m
2026-07-21 FIA5813 RMO → ALC Jul 21, 00:00 UTCJul 21, 07:10 UTC7h 10m
2026-07-20 FIA6311 - Jul 20, 21:50 UTCJul 20, 22:50 UTC1h 0m
2026-07-20 FIA5902 - Jul 20, 13:45 UTCJul 20, 15:55 UTC2h 10m
2026-07-20 FIA5901 RMO → CDG Jul 20, 09:30 UTCJul 20, 12:25 UTC2h 55m
2026-07-19 FIA5712 - Jul 19, 23:40 UTCJul 20, 02:45 UTC3h 5m
2026-07-19 FIA5711 RMO → DUB Jul 19, 19:00 UTCJul 19, 22:00 UTC3h 0m
2026-07-19 FIA5836 - Jul 19, 13:20 UTCJul 19, 15:25 UTC2h 5m
2026-07-19 FIA5835 RMO → BRU Jul 19, 09:55 UTCJul 19, 12:00 UTC2h 5m
2026-07-19 FIA6320 AYT → RMO Jul 19, 06:25 UTCJul 19, 07:50 UTC1h 25m
2026-07-18 FIA5712 DUB → AYT Jul 18, 22:45 UTCJul 19, 04:55 UTC6h 10m
2026-07-18 FIA5711 RMO → DUB Jul 18, 17:50 UTCJul 18, 21:15 UTC3h 25m
2026-07-18 FIA5738 - Jul 18, 14:05 UTCJul 18, 16:10 UTC2h 5m
2026-07-18 FIA5737 RMO → AMS Jul 18, 09:40 UTCJul 18, 12:10 UTC2h 30m
2026-07-17 FIA5618 - Jul 17, 21:34 UTCJul 18, 00:10 UTC2h 35m
2026-07-17 FIA5617 - Jul 17, 17:35 UTCJul 17, 19:55 UTC2h 20m
2026-07-17 FIA5234 - Jul 17, 12:45 UTCJul 17, 14:20 UTC1h 35m
2026-07-16 FIA5712 - Jul 16, 23:25 UTCJul 17, 11:35 UTC12h 10m
2026-07-16 FIA5711 RMO → DUB Jul 16, 18:50 UTCJul 16, 21:55 UTC3h 5m
2026-07-16 FIA5216 - Jul 16, 15:14 UTCJul 16, 17:00 UTC1h 45m
2026-07-16 FIA5215 - Jul 16, 12:00 UTCJul 16, 13:54 UTC1h 55m
2026-07-16 FIA5922 - Jul 16, 08:35 UTCJul 16, 09:20 UTC45m
2026-07-16 FIA5921 - Jul 16, 06:35 UTCJul 16, 07:00 UTC25m
2026-07-16 FIA5921 - Jul 16, 05:10 UTCJul 16, 05:55 UTC45m
2026-07-15 FIA5712 - Jul 15, 22:40 UTCJul 16, 01:40 UTC3h 0m

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 ER-00001 page for operator, model, and routing details .

Mode-S 504E84 frequently asked

What is Mode-S code 504E84?
504E84 is an ICAO 24-bit transponder address. Allocated to Moldova. Assigned to ER-00001.
Where is Mode-S 504E84 registered?
Mode-S code 504E84 is allocated to Moldova (MD). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 504E84 broadcasting right now?
Yes. Mode-S 504E84 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 504E84, octal 24047204, decimal 5,262,980.
What flights does 504E84 operate?
Mode-S 504E84 has broadcast 20 distinct callsigns, including FIA6320, FIA5711, FIA5712, FIA6319, FIA6311.