Apparatus

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sensors Mode-S transponder

451D8C

ICAO 24-bit transponder address · allocated to Bulgaria

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

Hex
451D8C
Octal
21216614
Decimal
4,529,548
Country
BG
Tail
LZ-BUR
Type
E190
Broadcasting now · callsign ASL16G · 16,500 ft
Flights observed
334
Distinct callsigns
20
Country
BG
Last broadcast
Jul 26, 20:40 UTC

Current position

451D8C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 451D8C 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
ASL75K - 18 2026-07-25
ASL20T - 18 2026-07-25
ASL80T - 14 2026-07-24
ASL47C Spurling Aviation 14 2026-07-24
ASL66K - 12 2026-07-23
ASL14B Spurling Aviation 12 2026-07-23
ASL87M - 9 2026-07-24
ASL427 Spurling Aviation 9 2026-07-22
ASL426 - 9 2026-07-21
ASL99V - 8 2026-07-25
ASL96M - 8 2026-07-26
ASL39W - 8 2026-07-24
ASL35V - 8 2026-07-26
ASL30E Spurling Aviation 8 2026-07-24
ASL79H Spurling Aviation 7 2026-07-25
ASL38Y - 7 2026-07-25
ASL32P Spurling Aviation 7 2026-07-25
ASL30R - 7 2026-07-25
ASL64T Spurling Aviation 6 2026-07-21
ASL58V - 6 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASL16J - Jul 26, 18:40 UTCJul 26, 20:35 UTC1h 55m
2026-07-26 ASL19H BEG → CPH Jul 26, 15:25 UTCJul 26, 17:20 UTC1h 55m
2026-07-26 ASL35V - Jul 26, 13:25 UTCJul 26, 13:50 UTC25m
2026-07-26 ASL96M - Jul 26, 11:45 UTCJul 26, 12:05 UTC20m
2026-07-25 ASL75K FRA → BEG Jul 25, 18:50 UTCJul 25, 20:15 UTC1h 25m
2026-07-25 ASL20T BEG → FRA Jul 25, 15:45 UTCJul 25, 17:20 UTC1h 35m
2026-07-25 ASL32P BEG → LCA Jul 25, 13:55 UTCJul 25, 14:15 UTC20m
2026-07-25 ASL38Y - Jul 25, 11:45 UTCJul 25, 12:00 UTC15m
2026-07-25 ASL30R FRA → BEG Jul 25, 09:00 UTCJul 25, 10:25 UTC1h 25m
2026-07-25 ASL79H INI → BEG Jul 25, 05:30 UTCJul 25, 07:15 UTC1h 45m
2026-07-25 ASL99V ATH → BEG Jul 25, 01:35 UTCJul 25, 03:00 UTC1h 25m
2026-07-24 ASL87M BEG → ATH Jul 24, 23:15 UTCJul 25, 00:25 UTC1h 10m
2026-07-24 ASL43N MXP → BEG Jul 24, 19:50 UTCJul 24, 21:05 UTC1h 15m
2026-07-24 ASL14G BEG → LHR Jul 24, 16:45 UTCJul 24, 18:10 UTC1h 25m
2026-07-24 ASL80T - Jul 24, 13:55 UTCJul 24, 14:45 UTC50m
2026-07-24 ASL47C VAR → BEG Jul 24, 12:10 UTCJul 24, 13:00 UTC50m
2026-07-24 ASL39W BRU → BEG Jul 24, 08:40 UTCJul 24, 10:40 UTC2h 0m
2026-07-24 ASL30E BEG → MAD Jul 24, 05:10 UTCJul 24, 07:15 UTC2h 5m
2026-07-23 ASL66K - Jul 23, 07:45 UTCJul 23, 09:35 UTC1h 50m
2026-07-23 ASL14B BEG → CPH Jul 23, 04:40 UTCJul 23, 06:35 UTC1h 55m
2026-07-23 ASL99V ATH → BEG Jul 23, 01:40 UTCJul 23, 03:05 UTC1h 25m
2026-07-22 ASL87M BEG → ATH Jul 22, 22:55 UTCJul 23, 00:05 UTC1h 10m
2026-07-22 ASL88B STR → BEG Jul 22, 19:20 UTCJul 22, 20:45 UTC1h 25m
2026-07-22 ASL99K BEG → STR Jul 22, 16:45 UTCJul 22, 18:10 UTC1h 25m
2026-07-22 ASL80T - Jul 22, 13:30 UTCJul 22, 14:25 UTC55m
2026-07-22 ASL47C VAR → BEG Jul 22, 11:40 UTCJul 22, 12:30 UTC50m
2026-07-22 ASL427 IST → BEG Jul 22, 01:45 UTCJul 22, 03:00 UTC1h 15m
2026-07-21 ASL426 - Jul 21, 23:10 UTCJul 22, 00:15 UTC1h 5m
2026-07-21 ASL64T SKG → BEG Jul 21, 14:00 UTCJul 21, 15:10 UTC1h 10m
2026-07-21 ASL46G BEG → SKG Jul 21, 11:55 UTCJul 21, 12:50 UTC55m
2026-07-21 ASL39W - Jul 21, 08:30 UTCJul 21, 10:15 UTC1h 45m
2026-07-21 ASL30E BEG → MAD Jul 21, 05:25 UTCJul 21, 07:25 UTC2h 0m
2026-07-20 ASL65A HAJ → BEG Jul 20, 19:00 UTCJul 20, 20:35 UTC1h 35m
2026-07-20 ASL17P BEG → HAJ Jul 20, 16:10 UTCJul 20, 17:55 UTC1h 45m
2026-07-20 ASL35V - Jul 20, 14:00 UTCJul 20, 14:30 UTC30m
2026-07-20 ASL96M - Jul 20, 12:20 UTCJul 20, 12:45 UTC25m
2026-07-20 ASL91J - Jul 20, 07:45 UTCJul 20, 09:50 UTC2h 5m
2026-07-20 ASL32B - Jul 20, 04:30 UTCJul 20, 06:30 UTC2h 0m
2026-07-19 ASL75K FRA → BEG Jul 19, 18:50 UTCJul 19, 20:25 UTC1h 35m
2026-07-19 ASL20T BEG → FRA Jul 19, 15:55 UTCJul 19, 17:35 UTC1h 40m
2026-07-18 ASL75K FRA → BEG Jul 18, 18:50 UTCJul 18, 20:15 UTC1h 25m
2026-07-18 ASL20T BEG → FRA Jul 18, 15:40 UTCJul 18, 17:40 UTC2h 0m
2026-07-18 ASL49H ZRH → BEG Jul 18, 13:55 UTCJul 18, 14:20 UTC25m
2026-07-18 ASL81C BEG → SJJ Jul 18, 12:40 UTCJul 18, 13:05 UTC25m
2026-07-18 ASL66K CPH → BEG Jul 18, 07:40 UTCJul 18, 09:35 UTC1h 55m
2026-07-18 ASL14B BEG → CPH Jul 18, 04:45 UTCJul 18, 06:35 UTC1h 50m
2026-07-17 ASL66N - Jul 17, 19:05 UTCJul 17, 21:15 UTC2h 10m
2026-07-17 ASL29G BEG → VCE Jul 17, 16:00 UTCJul 17, 18:10 UTC2h 10m
2026-07-17 ASL80T - Jul 17, 13:15 UTCJul 17, 14:04 UTC50m
2026-07-17 ASL47C VAR → BEG Jul 17, 11:20 UTCJul 17, 12:00 UTC40m

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

Mode-S 451D8C frequently asked

What is Mode-S code 451D8C?
451D8C is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-BUR.
Where is Mode-S 451D8C registered?
Mode-S code 451D8C is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 451D8C broadcasting right now?
Yes. Mode-S 451D8C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 451D8C, octal 21216614, decimal 4,529,548.
What flights does 451D8C operate?
Mode-S 451D8C has broadcast 20 distinct callsigns, including ASL75K, ASL20T, ASL80T, ASL47C, ASL66K.