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sensors Mode-S transponder

504E87

ICAO 24-bit transponder address · allocated to Moldova

Currently assigned to ER-00003 · AIRBUS A-321

Hex
504E87
Octal
24047207
Decimal
5,262,983
Country
MD
Tail
ER-00003
Type
A321
Broadcasting now · callsign FIA5711 · 36,025 ft
Flights observed
345
Distinct callsigns
20
Country
MD
Last broadcast
22m ago

Current position

504E87 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 504E87 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
FIA6312 - 25 2026-07-14
FIA6311 - 20 2026-07-13
FIA5711 - 20 2026-07-14
FIA5712 - 18 2026-07-07
FIA5326 - 18 2026-07-14
FIA5738 - 15 2026-07-13
FIA5325 - 15 2026-07-14
FIA6822 - 14 2026-07-14
FIA6344 Four Island Air 14 2026-05-03
FIA5737 - 13 2026-07-13
FIA6821 - 12 2026-07-12
FIA5902 - 12 2026-06-24
FIA5901 - 12 2026-06-24
FIA6343 Four Island Air 10 2026-05-03
FIA5581 - 10 2026-07-09
FIE533 - 8 2026-05-24
FIA5812 - 8 2026-06-24
FIA5617 - 8 2026-07-12
FIA5811 - 7 2026-06-24
FIA5638 - 7 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FIA5711 - Jul 14, 17:40 UTCJul 14, 19:45 UTC2h 5m
2026-07-14 FIA6822 - Jul 14, 12:05 UTCJul 14, 13:10 UTC1h 5m
2026-07-14 FIA5326 - Jul 14, 06:45 UTCJul 14, 10:20 UTC3h 35m
2026-07-14 FIA5325 - Jul 14, 04:15 UTCJul 14, 05:10 UTC55m
2026-07-14 FIA6312 - Jul 14, 00:25 UTCJul 14, 01:50 UTC1h 25m
2026-07-13 FIA6311 - Jul 13, 22:10 UTCJul 13, 23:00 UTC50m
2026-07-13 FIA5738 - Jul 13, 14:35 UTCJul 13, 16:40 UTC2h 5m
2026-07-13 FIA5737 - Jul 13, 10:35 UTCJul 13, 13:05 UTC2h 30m
2026-07-13 FIA5638 - Jul 13, 07:01 UTCJul 13, 09:00 UTC2h 0m
2026-07-13 FIA5637 - Jul 13, 02:55 UTCJul 13, 05:05 UTC2h 10m
2026-07-12 FIA5618 - Jul 12, 21:45 UTCJul 13, 00:15 UTC2h 30m
2026-07-12 FIA5617 - Jul 12, 12:40 UTCJul 12, 20:10 UTC7h 30m
2026-07-12 FIA6821 - Jul 12, 10:05 UTCJul 12, 11:01 UTC55m
2026-07-12 FIA6312 - Jul 12, 00:10 UTCJul 12, 01:30 UTC1h 20m
2026-07-11 FIA5548 STN → AYT Jul 11, 17:25 UTCJul 11, 22:55 UTC5h 30m
2026-07-11 FIA5547 RMO → STN Jul 11, 12:45 UTCJul 11, 15:45 UTC3h 0m
2026-07-11 FIA5612 - Jul 11, 06:50 UTCJul 11, 08:15 UTC1h 25m
2026-07-11 FIA5611 - Jul 11, 03:15 UTCJul 11, 05:10 UTC1h 55m
2026-07-11 FIA6312 - Jul 11, 00:20 UTCJul 11, 01:40 UTC1h 20m
2026-07-10 FIA6311 - Jul 10, 21:25 UTCJul 10, 22:50 UTC1h 25m
2026-07-10 FIA5234 - Jul 10, 13:55 UTCJul 10, 15:25 UTC1h 30m
2026-07-10 FIA5638 - Jul 10, 06:55 UTCJul 10, 12:35 UTC5h 40m
2026-07-09 FIA5637 - Jul 9, 22:40 UTCJul 10, 05:40 UTC7h 0m
2026-07-09 FIA5581 - Jul 9, 18:40 UTCJul 9, 20:45 UTC2h 5m
2026-07-09 FIA6822 TIV → RMO Jul 9, 12:00 UTCJul 9, 13:00 UTC1h 0m
2026-07-09 FIA6312 - Jul 9, 00:45 UTCJul 9, 10:15 UTC9h 30m
2026-07-08 FIA6311 - Jul 8, 21:55 UTCJul 8, 23:30 UTC1h 35m
2026-07-08 FIA5738 - Jul 8, 14:40 UTCJul 8, 16:45 UTC2h 5m
2026-07-08 FIA5737 - Jul 8, 10:30 UTCJul 8, 13:10 UTC2h 40m
2026-07-07 FIA5712 - Jul 7, 22:20 UTCJul 8, 01:05 UTC2h 45m
2026-07-07 FIA5711 - Jul 7, 17:25 UTCJul 7, 21:05 UTC3h 40m
2026-07-07 FIA6822 TIV → RMO Jul 7, 12:00 UTCJul 7, 13:00 UTC1h 0m
2026-07-07 FIA6821 RMO → TIV Jul 7, 09:10 UTCJul 7, 10:10 UTC1h 0m
2026-07-07 FIA6312 - Jul 7, 00:50 UTCJul 7, 02:15 UTC1h 25m
2026-07-06 FIA5738 AMS → AYT Jul 6, 14:35 UTCJul 6, 23:25 UTC8h 50m
2026-07-05 FIA5737 - Jul 5, 21:40 UTCJul 6, 12:15 UTC14h 35m
2026-07-05 FIA5617 - Jul 5, 13:45 UTCJul 5, 19:55 UTC6h 10m
2026-07-05 FIA5326 - Jul 5, 06:45 UTCJul 5, 11:15 UTC4h 30m
2026-07-05 FIA5325 - Jul 5, 04:50 UTCJul 5, 05:15 UTC25m
2026-07-05 FIA6312 - Jul 5, 00:10 UTCJul 5, 01:30 UTC1h 20m
2026-07-04 FIA6311 - Jul 4, 21:15 UTCJul 4, 22:40 UTC1h 25m
2026-07-04 FIA5814 - Jul 4, 08:20 UTCJul 4, 11:20 UTC3h 0m
2026-07-04 FIA5813 - Jul 4, 03:20 UTCJul 4, 06:50 UTC3h 30m
2026-07-03 FIA5712 - Jul 3, 22:35 UTCJul 4, 01:30 UTC2h 55m
2026-07-03 FIA5711 - Jul 3, 17:35 UTCJul 3, 21:20 UTC3h 45m
2026-07-03 FIA5232 - Jul 3, 06:55 UTCJul 3, 07:45 UTC50m
2026-07-03 FIA5231 - Jul 3, 03:30 UTCJul 3, 05:20 UTC1h 50m
2026-07-02 FIA5510 - Jul 2, 19:10 UTCJul 2, 21:25 UTC2h 15m
2026-07-02 FIA5509 - Jul 2, 15:00 UTCJul 2, 17:25 UTC2h 25m
2026-07-02 FIA6822 TIV → RMO Jul 2, 12:10 UTCJul 2, 13:10 UTC1h 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-00003 page for operator, model, and routing details .

Mode-S 504E87 frequently asked

What is Mode-S code 504E87?
504E87 is an ICAO 24-bit transponder address. Allocated to Moldova. Assigned to ER-00003.
Where is Mode-S 504E87 registered?
Mode-S code 504E87 is allocated to Moldova (MD). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 504E87 broadcasting right now?
Yes. Mode-S 504E87 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 504E87, octal 24047207, decimal 5,262,983.
What flights does 504E87 operate?
Mode-S 504E87 has broadcast 20 distinct callsigns, including FIA6312, FIA6311, FIA5711, FIA5712, FIA5326.