Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

451D86

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-VAR · EMBRAER ERJ-190-100

Hex
451D86
Octal
21216606
Decimal
4,529,542
Country
BG
Tail
LZ-VAR
Type
E190
No current signal · last broadcast 1h ago
Flights observed
479
Distinct callsigns
20
Country
BG
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 451D86.

Country allocation

The ICAO 24-bit address 451D86 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
ASL87M - 23 2026-07-05
ASL99V - 21 2026-07-06
ASL79H - 19 2026-07-11
ASL30R - 18 2026-07-11
ASL20T - 16 2026-07-11
ASL75K - 15 2026-07-11
ASL80T - 14 2026-07-04
ASL47C Spurling Aviation 14 2026-07-04
ASL96M - 11 2026-07-06
ASL66K - 11 2026-07-14
ASL46G - 11 2026-07-05
ASL35V - 11 2026-07-06
ASL14B - 11 2026-07-14
ASL64T Spurling Aviation 10 2026-07-05
ASL58V - 9 2026-06-29
ASL16G - 9 2026-06-29
ASL91J - 8 2026-07-06
ASL39W - 8 2026-07-07
ASL66N - 7 2026-07-10
ASL56V Spurling Aviation 7 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASL66K - Jul 14, 08:00 UTCJul 14, 09:30 UTC1h 30m
2026-07-14 ASL14B BEG → CPH Jul 14, 04:35 UTCJul 14, 06:30 UTC1h 55m
2026-07-13 ASL98C - Jul 13, 19:00 UTCJul 13, 20:15 UTC1h 15m
2026-07-13 ASL90F BEG → ZRH Jul 13, 16:15 UTCJul 13, 17:50 UTC1h 35m
2026-07-13 ASL53E ZRH → BEG Jul 13, 12:50 UTCJul 13, 14:10 UTC1h 20m
2026-07-13 ASL27D BEG → ZRH Jul 13, 10:10 UTCJul 13, 11:40 UTC1h 30m
2026-07-13 ASL71B ATH → BEG Jul 13, 07:05 UTCJul 13, 08:25 UTC1h 20m
2026-07-13 ASL70J BEG → ATH Jul 13, 04:35 UTCJul 13, 05:45 UTC1h 10m
2026-07-12 ASL51C VLC → BEG Jul 12, 18:50 UTCJul 12, 20:25 UTC1h 35m
2026-07-12 ASL56V LCA → BEG Jul 12, 16:01 UTCJul 12, 17:45 UTC1h 45m
2026-07-11 ASL75K FRA → BEG Jul 11, 18:45 UTCJul 11, 20:10 UTC1h 25m
2026-07-11 ASL20T BEG → FRA Jul 11, 15:45 UTCJul 11, 17:30 UTC1h 45m
2026-07-11 ASL49H ZRH → BEG Jul 11, 13:45 UTCJul 11, 14:10 UTC25m
2026-07-11 ASL81C BEG → SJJ Jul 11, 12:20 UTCJul 11, 12:45 UTC25m
2026-07-11 ASL30R FRA → BEG Jul 11, 08:45 UTCJul 11, 10:20 UTC1h 35m
2026-07-11 ASL79H BEG → FRA Jul 11, 05:10 UTCJul 11, 06:55 UTC1h 45m
2026-07-10 ASL66N - Jul 10, 18:55 UTCJul 10, 20:45 UTC1h 50m
2026-07-10 ASL29G BEG → VCE Jul 10, 15:35 UTCJul 10, 17:50 UTC2h 15m
2026-07-10 ASL62R - Jul 10, 13:10 UTCJul 10, 14:10 UTC1h 0m
2026-07-10 ASL34F - Jul 10, 10:30 UTCJul 10, 11:25 UTC55m
2026-07-10 ASL11J NUE → BEG Jul 10, 07:40 UTCJul 10, 08:50 UTC1h 10m
2026-07-10 ASL76Q BEG → NUE Jul 10, 05:15 UTCJul 10, 06:50 UTC1h 35m
2026-07-07 ASL39W - Jul 7, 08:10 UTCJul 7, 10:00 UTC1h 50m
2026-07-07 ASL30E BEG → BRU Jul 7, 05:00 UTCJul 7, 07:10 UTC2h 10m
2026-07-06 ASL65A HAJ → BEG Jul 6, 19:00 UTCJul 6, 20:30 UTC1h 30m
2026-07-06 ASL17P BEG → HAJ Jul 6, 16:15 UTCJul 6, 18:00 UTC1h 45m
2026-07-06 ASL35V - Jul 6, 13:30 UTCJul 6, 14:00 UTC30m
2026-07-06 ASL96M - Jul 6, 12:00 UTCJul 6, 12:25 UTC25m
2026-07-06 ASL91J - Jul 6, 07:50 UTCJul 6, 09:45 UTC1h 55m
2026-07-06 ASL32B - Jul 6, 04:20 UTCJul 6, 06:40 UTC2h 20m
2026-07-06 ASL99V ATH → BEG Jul 6, 01:40 UTCJul 6, 02:55 UTC1h 15m
2026-07-05 ASL87M BEG → ATH Jul 5, 23:10 UTCJul 6, 00:25 UTC1h 15m
2026-07-05 ASL14A ATH → BEG Jul 5, 18:45 UTCJul 5, 20:05 UTC1h 20m
2026-07-05 ASL46F BEG → ATH Jul 5, 16:25 UTCJul 5, 17:45 UTC1h 20m
2026-07-05 ASL64T SKG → BEG Jul 5, 13:50 UTCJul 5, 14:50 UTC1h 0m
2026-07-05 ASL46G BEG → SKG Jul 5, 11:20 UTCJul 5, 12:20 UTC1h 0m
2026-07-04 ASL80T - Jul 4, 13:20 UTCJul 4, 14:15 UTC55m
2026-07-04 ASL47C VAR → BEG Jul 4, 11:20 UTCJul 4, 12:20 UTC1h 0m
2026-07-04 ASL19P - Jul 4, 07:50 UTCJul 4, 09:15 UTC1h 25m
2026-07-04 ASL94D BEG → BER Jul 4, 04:55 UTCJul 4, 06:30 UTC1h 35m
2026-07-03 ASL51C VLC → BEG Jul 3, 18:35 UTCJul 3, 20:15 UTC1h 40m
2026-07-03 ASL56V LCA → BEG Jul 3, 15:35 UTCJul 3, 17:30 UTC1h 55m
2026-07-03 ASL49H ZRH → BEG Jul 3, 13:20 UTCJul 3, 13:45 UTC25m
2026-07-03 ASL81C BEG → SJJ Jul 3, 12:00 UTCJul 3, 12:20 UTC20m
2026-07-03 ASL39W - Jul 3, 08:10 UTCJul 3, 10:00 UTC1h 50m
2026-07-03 ASL30E BEG → BRU Jul 3, 05:00 UTCJul 3, 07:10 UTC2h 10m
2026-07-03 ASL99V ATH → BEG Jul 3, 01:35 UTCJul 3, 02:50 UTC1h 15m
2026-07-02 ASL87M BEG → ATH Jul 2, 23:00 UTCJul 3, 00:15 UTC1h 15m
2026-07-02 ASL64T SKG → BEG Jul 2, 13:30 UTCJul 2, 14:20 UTC50m
2026-07-02 ASL46G BEG → SKG Jul 2, 11:20 UTCJul 2, 12:15 UTC55m

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-VAR page for operator, model, and routing details .

Mode-S 451D86 frequently asked

What is Mode-S code 451D86?
451D86 is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-VAR.
Where is Mode-S 451D86 registered?
Mode-S code 451D86 is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 451D86 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 451D86, octal 21216606, decimal 4,529,542.
What flights does 451D86 operate?
Mode-S 451D86 has broadcast 20 distinct callsigns, including ASL87M, ASL99V, ASL79H, ASL30R, ASL20T.