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 Jul 25, 09:40 UTC
Flights observed
530
Distinct callsigns
20
Country
BG
Last broadcast
Jul 25, 09:40 UTC

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
ASL79H - 22 2026-07-21
ASL99V - 21 2026-07-06
ASL30R - 21 2026-07-21
ASL20T - 17 2026-07-14
ASL75K - 16 2026-07-14
ASL80T - 15 2026-07-18
ASL47C Spurling Aviation 15 2026-07-18
ASL35V - 14 2026-07-24
ASL96M - 13 2026-07-19
ASL46G - 13 2026-07-22
ASL64T Spurling Aviation 12 2026-07-22
ASL58V Spurling Aviation 12 2026-07-25
ASL16G Spurling Aviation 12 2026-07-25
ASL66K - 11 2026-07-14
ASL14B - 11 2026-07-14
ASL91J - 8 2026-07-06
ASL56V Spurling Aviation 8 2026-07-24
ASL51C Spurling Aviation 8 2026-07-24
ASL39W - 8 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 ASL16G OPO → BEG Jul 25, 08:25 UTCJul 25, 09:40 UTC1h 15m
2026-07-25 ASL58V BEG → KRK Jul 25, 04:50 UTCJul 25, 06:20 UTC1h 30m
2026-07-24 ASL51C VLC → BEG Jul 24, 19:15 UTCJul 24, 20:45 UTC1h 30m
2026-07-24 ASL56V LCA → BEG Jul 24, 16:25 UTCJul 24, 18:20 UTC1h 55m
2026-07-24 ASL35V - Jul 24, 14:15 UTCJul 24, 14:50 UTC35m
2026-07-24 ASL634 - Jul 24, 12:45 UTCJul 24, 13:00 UTC15m
2026-07-24 ASL16G MXP → BEG Jul 24, 10:10 UTCJul 24, 11:30 UTC1h 20m
2026-07-24 ASL58V BEG → KRK Jul 24, 05:30 UTCJul 24, 06:55 UTC1h 25m
2026-07-24 ASL427 IST → BEG Jul 24, 01:45 UTCJul 24, 02:55 UTC1h 10m
2026-07-23 ASL426 BEG → IST Jul 23, 23:10 UTCJul 24, 00:20 UTC1h 10m
2026-07-23 ASL88B STR → BEG Jul 23, 19:10 UTCJul 23, 20:30 UTC1h 20m
2026-07-23 ASL99K BEG → STR Jul 23, 16:45 UTCJul 23, 18:15 UTC1h 30m
2026-07-23 ASL87Q SKP → BEG Jul 23, 13:25 UTCJul 23, 14:00 UTC35m
2026-07-23 ASL56C FCO → BEG Jul 23, 11:35 UTCJul 23, 12:05 UTC30m
2026-07-23 ASL71B ATH → BEG Jul 23, 08:35 UTCJul 23, 09:55 UTC1h 20m
2026-07-23 ASL70J BEG → ATH Jul 23, 06:10 UTCJul 23, 07:20 UTC1h 10m
2026-07-22 ASL81R TIV → BEG Jul 22, 19:45 UTCJul 22, 21:35 UTC1h 50m
2026-07-22 ASL85C BEG → BRU Jul 22, 16:20 UTCJul 22, 18:25 UTC2h 5m
2026-07-22 ASL64T SKG → BEG Jul 22, 14:00 UTCJul 22, 14:55 UTC55m
2026-07-22 ASL46G BEG → SKG Jul 22, 11:45 UTCJul 22, 12:40 UTC55m
2026-07-21 ASL30R FRA → BEG Jul 21, 11:00 UTCJul 21, 12:20 UTC1h 20m
2026-07-21 ASL79H BEG → FRA Jul 21, 05:05 UTCJul 21, 06:50 UTC1h 45m
2026-07-20 ASL35C BEG → STR Jul 20, 19:10 UTCJul 20, 20:20 UTC1h 10m
2026-07-20 ASL77G CDG → BEG Jul 20, 16:50 UTCJul 20, 18:15 UTC1h 25m
2026-07-20 ASL27L DBV → BEG Jul 20, 14:15 UTCJul 20, 15:05 UTC50m
2026-07-20 ASL90A - Jul 20, 12:35 UTCJul 20, 13:20 UTC45m
2026-07-20 ASL90A BEG → BEG Jul 20, 12:15 UTCJul 20, 12:20 UTC5m
2026-07-20 ASL30R FRA → BEG Jul 20, 08:30 UTCJul 20, 10:00 UTC1h 30m
2026-07-20 ASL79H BEG → FRA Jul 20, 05:25 UTCJul 20, 07:05 UTC1h 40m
2026-07-19 ASL16J CPH → BEG Jul 19, 18:45 UTCJul 19, 20:40 UTC1h 55m
2026-07-19 ASL19H BEG → CPH Jul 19, 15:45 UTCJul 19, 17:30 UTC1h 45m
2026-07-19 ASL35V - Jul 19, 13:35 UTCJul 19, 14:05 UTC30m
2026-07-19 ASL96M - Jul 19, 11:55 UTCJul 19, 12:20 UTC25m
2026-07-18 ASL80T - Jul 18, 13:15 UTCJul 18, 14:00 UTC45m
2026-07-18 ASL47C VAR → BEG Jul 18, 11:35 UTCJul 18, 12:20 UTC45m
2026-07-18 ASL20K - Jul 18, 08:05 UTCJul 18, 09:10 UTC1h 5m
2026-07-18 ASL42A - Jul 18, 05:00 UTCJul 18, 06:20 UTC1h 20m
2026-07-17 ASL43N MXP → BEG Jul 17, 19:30 UTCJul 17, 20:40 UTC1h 10m
2026-07-17 ASL14G BEG → LHR Jul 17, 16:24 UTCJul 17, 18:00 UTC1h 35m
2026-07-17 ASL35V - Jul 17, 13:29 UTCJul 17, 14:00 UTC30m
2026-07-17 ASL96M - Jul 17, 12:00 UTCJul 17, 12:19 UTC20m
2026-07-17 ASL16G MXP → BEG Jul 17, 07:50 UTCJul 17, 09:10 UTC1h 20m
2026-07-17 ASL58V BEG → MXP Jul 17, 05:10 UTCJul 17, 06:35 UTC1h 25m
2026-07-16 ASL64T SKG → BEG Jul 16, 13:25 UTCJul 16, 14:15 UTC50m
2026-07-16 ASL46G BEG → SKG Jul 16, 11:30 UTCJul 16, 12:20 UTC50m
2026-07-16 ASL30R FRA → BEG Jul 16, 08:15 UTCJul 16, 09:45 UTC1h 30m
2026-07-16 ASL79H BEG → FRA Jul 16, 05:15 UTCJul 16, 06:55 UTC1h 40m
2026-07-15 ASL43N MXP → BEG Jul 15, 20:45 UTCJul 15, 22:00 UTC1h 15m
2026-07-15 ASL14G BEG → LHR Jul 15, 18:00 UTCJul 15, 19:30 UTC1h 30m
2026-07-14 ASL75K FRA → BEG Jul 14, 18:40 UTCJul 14, 20:05 UTC1h 25m

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 Jul 25, 09:40 UTC.
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, ASL79H, ASL99V, ASL30R, ASL20T.