Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

452181

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-CJC · BOEING 747-400

Hex
452181
Octal
21220601
Decimal
4,530,561
Country
BG
Tail
LZ-CJC
Type
B744
No current signal · last broadcast 2h ago
Flights observed
169
Distinct callsigns
20
Country
BG
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 452181.

Country allocation

The ICAO 24-bit address 452181 falls within the block assigned to Bulgaria (BG) by ICAO Annex 10, Volume III. Every aircraft registered in Bulgaria 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
UAE9903 Emirates 21 2026-05-27
UAE9837 Emirates 12 2026-05-17
UAE9836 Emirates 11 2026-05-17
UAE9839 Emirates 9 2026-05-24
UAE9853 Emirates 8 2026-05-15
UAE9838 Emirates 8 2026-05-24
UAE9781 Emirates 8 2026-05-25
UAE9859 - 7 2026-05-26
UAE9394 Emirates 7 2026-04-20
UAE9858 - 6 2026-05-26
UAE9844 Emirates 6 2026-05-22
UAE9906 Emirates 5 2026-05-28
UAE9847 Emirates 5 2026-05-30
UAE9845 Emirates 5 2026-05-23
UAE9791 Emirates 5 2026-05-22
UAE9780 Emirates 5 2026-05-20
UAE9393 Emirates 5 2026-04-19
UAE9852 Emirates 4 2026-04-17
UAE9846 Emirates 4 2026-05-29
UAE9790 Emirates 4 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 UAE9847 JFK → DXB May 30, 00:00 UTCMay 30, 05:00 UTC5h 0m
2026-05-29 UAE9847 JFK → DXB May 29, 23:15 UTCMay 29, 23:25 UTC10m
2026-05-29 UAE9846 HKG → TOL May 29, 14:15 UTCMay 29, 20:05 UTC5h 50m
2026-05-28 UAE9846 HKG → TOL May 28, 22:20 UTCMay 29, 20:05 UTC21h 45m
2026-05-28 UAE9906 MAD → DWC May 28, 20:45 UTCMay 29, 20:05 UTC23h 20m
2026-05-27 UAE9391 DWC → DWC May 27, 20:45 UTCMay 28, 14:20 UTC17h 35m
2026-05-27 UAE9903 FRA → DWC May 27, 16:05 UTCMay 27, 16:45 UTC40m
2026-05-27 UAE9903 FRA → DWC May 27, 05:49 UTCMay 27, 12:20 UTC6h 30m
2026-05-26 UAE9903 FRA → DWC May 26, 14:55 UTCMay 27, 12:20 UTC21h 25m
2026-05-26 UAE9903 FRA → DWC May 26, 12:20 UTCMay 27, 12:15 UTC23h 56m
2026-05-26 UAE9903 FRA → DWC May 26, 11:54 UTCMay 27, 10:15 UTC22h 21m
2026-05-26 UAE9859 - May 26, 09:59 UTCMay 26, 10:14 UTC15m
2026-05-26 UAE9858 - May 26, 07:10 UTCMay 26, 07:45 UTC35m
2026-05-25 UAE9858 - May 25, 10:20 UTCMay 26, 05:00 UTC18h 39m
2026-05-25 UAE9781 HKG → DWC May 25, 09:10 UTCMay 26, 05:00 UTC19h 50m
2026-05-25 UAE9781 HKG → DWC May 25, 07:15 UTCMay 25, 07:30 UTC15m
2026-05-24 UAE9839 HKG → DWC May 24, 09:05 UTCMay 25, 04:10 UTC19h 5m
2026-05-24 UAE9839 HKG → DWC May 24, 07:10 UTCMay 24, 07:25 UTC15m
2026-05-24 UAE9838 DWC → HKG May 24, 02:15 UTCMay 24, 02:45 UTC30m
2026-05-23 UAE9838 DWC → HKG May 23, 09:10 UTCMay 24, 00:20 UTC15h 10m
2026-05-23 UAE9845 HKG → HKG May 23, 07:15 UTCMay 23, 07:30 UTC15m
2026-05-22 UAE9844 DWC → HKG May 22, 23:00 UTCMay 23, 05:15 UTC6h 15m
2026-05-22 UAE9844 DWC → HKG May 22, 21:45 UTCMay 22, 22:15 UTC30m
2026-05-22 UAE9747 DWC → LLW May 22, 16:40 UTCMay 22, 17:15 UTC35m
2026-05-22 UAE9791 HKG → DWC May 22, 05:25 UTCMay 22, 09:10 UTC3h 45m
2026-05-22 UAE9791 HKG → DWC May 22, 03:25 UTCMay 22, 03:40 UTC15m
2026-05-21 UAE9790 DWC → DWC May 21, 18:10 UTCMay 22, 00:00 UTC5h 50m
2026-05-21 UAE9790 DWC → DWC May 21, 16:50 UTCMay 21, 17:15 UTC25m
2026-05-20 UAE9781 HKG → DWC May 20, 09:55 UTCMay 20, 14:15 UTC4h 20m
2026-05-20 UAE9781 HKG → DWC May 20, 08:10 UTCMay 20, 08:25 UTC15m
2026-05-20 UAE9780 DWC → HKG May 20, 03:45 UTCMay 20, 04:15 UTC30m
2026-05-19 UAE9780 DWC → HKG May 19, 22:30 UTCMay 20, 01:35 UTC3h 5m
2026-05-17 UAE9837 HKG → HKG May 17, 13:45 UTCMay 17, 16:40 UTC2h 55m
2026-05-17 UAE9837 HKG → HKG May 17, 10:55 UTCMay 17, 11:05 UTC10m
2026-05-17 UAE9836 DWC → HKG May 17, 06:45 UTCMay 17, 07:00 UTC15m
2026-05-17 UAE9836 DWC → HKG May 17, 01:20 UTCMay 17, 04:15 UTC2h 55m
2026-05-16 UAE9746 MST → ZAZ May 16, 17:10 UTCMay 16, 22:30 UTC5h 20m
2026-05-16 UAE9791 HKG → DWC May 16, 15:31 UTCMay 16, 15:40 UTC10m
2026-05-16 UAE9791 HKG → DWC May 16, 10:11 UTCMay 16, 14:11 UTC4h 0m
2026-05-16 UAE9791 HKG → DWC May 16, 08:16 UTCMay 16, 08:31 UTC15m
2026-05-16 UAE9790 DWC → DWC May 16, 05:20 UTCMay 16, 05:56 UTC36m
2026-05-15 UAE9790 DWC → DWC May 15, 14:05 UTCMay 16, 03:10 UTC13h 4m
2026-05-15 UAE9853 HAN → DWC May 15, 11:25 UTCMay 15, 11:40 UTC15m
2026-05-14 UAE9906 MAD → DWC May 14, 15:05 UTCMay 15, 07:35 UTC16h 30m
2026-05-14 UAE9391 DWC → DWC May 14, 05:35 UTCMay 14, 12:15 UTC6h 40m
2026-05-14 UAE9391 DWC → DWC May 14, 04:50 UTCMay 14, 04:55 UTC5m
2026-05-13 UAE9903 FRA → DWC May 13, 18:50 UTCMay 14, 00:35 UTC5h 45m
2026-05-13 UAE9903 FRA → DWC May 13, 15:30 UTCMay 13, 16:15 UTC45m
2026-05-12 UAE9903 FRA → DWC May 12, 23:20 UTCMay 13, 12:30 UTC13h 10m
2026-05-12 UAE9903 FRA → DWC May 12, 12:20 UTCMay 13, 12:15 UTC23h 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 LZ-CJC page for operator, model, and routing details .

Mode-S 452181 frequently asked

What is Mode-S code 452181?
452181 is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-CJC.
Where is Mode-S 452181 registered?
Mode-S code 452181 is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 452181 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 452181, octal 21220601, decimal 4,530,561.
What flights does 452181 operate?
Mode-S 452181 has broadcast 20 distinct callsigns, including UAE9903, UAE9837, UAE9836, UAE9839, UAE9853.