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
No current signal · last broadcast 1h ago
Flights observed
150
Distinct callsigns
20
Country
MD
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 504E84.

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 20 2026-06-17
FIA6319 Four Island Air 17 2026-06-17
FIA5711 - 16 2026-06-19
FIA5712 - 15 2026-06-18
FIA5812 - 7 2026-06-17
FIA5811 Four Island Air 7 2026-06-17
FIA6312 Four Island Air 6 2026-06-14
FIA6311 Four Island Air 6 2026-06-14
FIA5738 Four Island Air 5 2026-06-15
FIA5902 Four Island Air 4 2026-06-19
FIA5737 Four Island Air 4 2026-06-15
FIA5582 Four Island Air 4 2026-05-20
FIA5581 Four Island Air 4 2026-05-14
FIA5326 Four Island Air 4 2026-06-19
FIA5325 Four Island Air 4 2026-06-19
FIA5901 Four Island Air 3 2026-06-05
FIA5232 Four Island Air 3 2026-05-17
FIA5231 Four Island Air 3 2026-05-17
FIE534 - 2 2026-05-18
FIE533 - 2 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-19 FIA5711 - Jun 19, 18:14 UTCJun 19, 20:59 UTC2h 45m
2026-06-19 FIA5902 CDG → RMO Jun 19, 14:24 UTCJun 19, 16:44 UTC2h 20m
2026-06-19 FIA5326 IST → RMO Jun 19, 07:04 UTCJun 19, 07:49 UTC45m
2026-06-19 FIA5325 RMO → IST Jun 19, 04:54 UTCJun 19, 05:24 UTC30m
2026-06-18 FIA5712 DUB → IAS Jun 18, 23:00 UTCJun 19, 02:04 UTC3h 4m
2026-06-18 FIA5711 - Jun 18, 18:50 UTCJun 18, 21:45 UTC2h 55m
2026-06-18 FIA5326 IST → RMO Jun 18, 06:50 UTCJun 18, 07:40 UTC50m
2026-06-18 FIA5325 RMO → IST Jun 18, 05:00 UTCJun 18, 05:25 UTC25m
2026-06-17 FIA5812 - Jun 17, 22:35 UTCJun 18, 02:35 UTC4h 0m
2026-06-17 FIA5811 RMO → LIS Jun 17, 17:40 UTCJun 17, 20:40 UTC3h 0m
2026-06-17 FIA6320 AYT → RMO Jun 17, 07:25 UTCJun 17, 08:50 UTC1h 25m
2026-06-17 FIA6319 RMO → AYT Jun 17, 04:45 UTCJun 17, 06:00 UTC1h 15m
2026-06-16 FIA5712 - Jun 16, 22:35 UTCJun 17, 01:30 UTC2h 55m
2026-06-16 FIA5711 - Jun 16, 17:24 UTCJun 16, 21:10 UTC3h 46m
2026-06-16 FIA6320 AYT → RMO Jun 16, 07:20 UTCJun 16, 08:44 UTC1h 25m
2026-06-16 FIA6319 RMO → AYT Jun 16, 04:05 UTCJun 16, 05:34 UTC1h 30m
2026-06-15 FIA5738 AMS → RMO Jun 15, 14:24 UTCJun 15, 16:24 UTC2h 0m
2026-06-15 FIA5737 RMO → AMS Jun 15, 09:54 UTCJun 15, 12:35 UTC2h 40m
2026-06-15 FIA6320 AYT → RMO Jun 15, 07:05 UTCJun 15, 08:29 UTC1h 25m
2026-06-15 FIA6319 RMO → AYT Jun 15, 03:50 UTCJun 15, 05:20 UTC1h 30m
2026-06-14 FIA6312 AYT → RMO Jun 14, 23:54 UTCJun 15, 01:25 UTC1h 30m
2026-06-14 FIA6311 RMO → AYT Jun 14, 22:15 UTCJun 14, 22:40 UTC25m
2026-06-14 FIA5618 LTN → RMO Jun 14, 17:05 UTCJun 14, 19:20 UTC2h 15m
2026-06-14 FIA5617 RMO → LTN Jun 14, 12:25 UTCJun 14, 15:50 UTC3h 25m
2026-06-14 FIA6320 AYT → RMO Jun 14, 06:50 UTCJun 14, 08:20 UTC1h 30m
2026-06-14 FIA6319 RMO → AYT Jun 14, 03:55 UTCJun 14, 05:30 UTC1h 36m
2026-06-13 FIA5738 AMS → RMO Jun 13, 14:25 UTCJun 13, 16:20 UTC1h 55m
2026-06-13 FIA5737 RMO → AMS Jun 13, 09:50 UTCJun 13, 12:45 UTC2h 55m
2026-06-13 FIA6320 AYT → RMO Jun 13, 07:00 UTCJun 13, 08:05 UTC1h 5m
2026-06-13 FIA6319 RMO → AYT Jun 13, 03:40 UTCJun 13, 05:30 UTC1h 49m
2026-06-12 FIA5618 LTN → RMO Jun 12, 21:30 UTCJun 12, 23:50 UTC2h 20m
2026-06-12 FIA5617 RMO → LTN Jun 12, 17:00 UTCJun 12, 20:15 UTC3h 15m
2026-06-12 FIA5638 HHN → RMO Jun 12, 13:30 UTCJun 12, 15:25 UTC1h 55m
2026-06-12 FIA5637 RMO → HHN Jun 12, 09:45 UTCJun 12, 12:00 UTC2h 15m
2026-06-12 FIA6320 AYT → RMO Jun 12, 06:45 UTCJun 12, 08:10 UTC1h 25m
2026-06-12 FIA6319 RMO → AYT Jun 12, 04:30 UTCJun 12, 05:10 UTC40m
2026-06-12 FIA6312 AYT → RMO Jun 12, 00:30 UTCJun 12, 01:55 UTC1h 25m
2026-06-11 FIA6311 RMO → AYT Jun 11, 22:45 UTCJun 11, 23:10 UTC25m
2026-06-11 FIA6320 AYT → RMO Jun 11, 09:20 UTCJun 11, 10:55 UTC1h 35m
2026-06-11 FIA6319 RMO → AYT Jun 11, 06:20 UTCJun 11, 07:55 UTC1h 35m
2026-06-10 FIA5812 LIS → RMO Jun 10, 22:40 UTCJun 11, 02:40 UTC4h 0m
2026-06-10 FIA5811 RMO → LIS Jun 10, 16:35 UTCJun 10, 21:05 UTC4h 30m
2026-06-10 FIA6320 AYT → RMO Jun 10, 09:25 UTCJun 10, 11:00 UTC1h 35m
2026-06-10 FIA6319 RMO → AYT Jun 10, 06:20 UTCJun 10, 07:25 UTC1h 5m
2026-06-09 FIA5712 DUB → RMO Jun 9, 22:40 UTCJun 10, 01:40 UTC3h 0m
2026-06-09 FIA5711 RMO → DUB Jun 9, 17:35 UTCJun 9, 21:10 UTC3h 35m
2026-06-09 FIA6320 AYT → RMO Jun 9, 09:20 UTCJun 9, 10:45 UTC1h 25m
2026-06-09 FIA6319 RMO → AYT Jun 9, 06:35 UTCJun 9, 07:50 UTC1h 15m
2026-06-08 FIA6320 AYT → RMO Jun 8, 11:00 UTCJun 8, 12:30 UTC1h 30m
2026-06-08 FIA6319 RMO → AYT Jun 8, 08:40 UTCJun 8, 09:25 UTC45m

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?
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 504E84, octal 24047204, decimal 5,262,980.
What flights does 504E84 operate?
Mode-S 504E84 has broadcast 20 distinct callsigns, including FIA6320, FIA6319, FIA5711, FIA5712, FIA5812.