Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

451E8B

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-FBA · AIRBUS A-319

Hex
451E8B
Octal
21217213
Decimal
4,529,803
Country
BG
Tail
LZ-FBA
Type
A319
Broadcasting now · callsign GPX6941 · 37,025 ft
Flights observed
270
Distinct callsigns
20
Country
BG
Last broadcast
16m ago

Current position

451E8B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 451E8B 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
GPX5ZP - 27 2026-07-15
GPX5PZ - 26 2026-07-15
GPX4HG - 23 2026-07-15
GPX4GH GP Aviation 22 2026-07-15
GPX9RE - 11 2026-06-30
GPX9ER - 11 2026-06-30
GPX4LG - 10 2026-07-12
GPX4VA GP Aviation 9 2026-06-24
GPX4GL - 9 2026-07-12
GPX4AV - 9 2026-06-24
GPX4861 - 8 2026-05-28
GPX4860 GP Aviation 7 2026-05-28
GPX9ZH GP Aviation 6 2026-07-16
GPX9HZ GP Aviation 6 2026-07-16
GPX7961 GP Aviation 6 2026-06-21
GPX7960 GP Aviation 6 2026-06-21
GPX6UC - 5 2026-06-02
GPX6CU GP Aviation 5 2026-06-02
GPX1193 - 4 2026-07-13
GPX1192 - 4 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 GPX6941 - Jul 18, 05:10 UTCJul 18, 06:45 UTC1h 35m
2026-07-18 GPX6940 - Jul 18, 00:29 UTCJul 18, 03:15 UTC2h 46m
2026-07-17 GPX1815 - Jul 17, 17:20 UTCJul 17, 18:44 UTC1h 25m
2026-07-17 GPX1814 - Jul 17, 14:20 UTCJul 17, 16:04 UTC1h 45m
2026-07-17 GPX5871 - Jul 17, 11:35 UTCJul 17, 13:05 UTC1h 30m
2026-07-17 GPX5870 - Jul 17, 08:04 UTCJul 17, 10:00 UTC1h 55m
2026-07-16 GPX9HZ SZG → PRN Jul 16, 18:40 UTCJul 16, 19:40 UTC1h 0m
2026-07-16 GPX9ZH PRN → SZG Jul 16, 16:00 UTCJul 16, 17:20 UTC1h 20m
2026-07-16 GPX4211 - Jul 16, 12:49 UTCJul 16, 14:45 UTC1h 55m
2026-07-16 GPX4210 - Jul 16, 08:45 UTCJul 16, 10:59 UTC2h 15m
2026-07-15 GPX5ZP - Jul 15, 19:15 UTCJul 15, 20:35 UTC1h 20m
2026-07-15 GPX5PZ - Jul 15, 16:05 UTCJul 15, 17:50 UTC1h 45m
2026-07-15 GPX4GH HAM → HAM Jul 15, 10:50 UTCJul 15, 12:40 UTC1h 50m
2026-07-15 GPX4HG - Jul 15, 07:20 UTCJul 15, 09:25 UTC2h 5m
2026-07-14 GPX7NC - Jul 14, 20:45 UTCJul 14, 22:20 UTC1h 35m
2026-07-14 GPX7CN PRN → LUX Jul 14, 16:45 UTCJul 14, 18:50 UTC2h 5m
2026-07-14 GPX2871 - Jul 14, 13:20 UTCJul 14, 14:45 UTC1h 25m
2026-07-14 GPX2870 - Jul 14, 10:20 UTCJul 14, 12:15 UTC1h 55m
2026-07-13 GPX1193 - Jul 13, 12:30 UTCJul 13, 13:20 UTC50m
2026-07-13 GPX1192 - Jul 13, 10:15 UTCJul 13, 11:15 UTC1h 0m
2026-07-12 GPX4VF - Jul 12, 18:50 UTCJul 12, 20:05 UTC1h 15m
2026-07-12 GPX4FV - Jul 12, 16:15 UTCJul 12, 17:45 UTC1h 30m
2026-07-12 GPX4GL - Jul 12, 12:45 UTCJul 12, 14:30 UTC1h 45m
2026-07-12 GPX4LG - Jul 12, 09:10 UTCJul 12, 11:15 UTC2h 5m
2026-07-11 GPX5ZP - Jul 11, 18:55 UTCJul 11, 20:20 UTC1h 25m
2026-07-11 GPX5PZ - Jul 11, 15:30 UTCJul 11, 17:05 UTC1h 35m
2026-07-11 GPX6281 - Jul 11, 12:15 UTCJul 11, 13:45 UTC1h 30m
2026-07-11 GPX6280 - Jul 11, 08:30 UTCJul 11, 10:20 UTC1h 50m
2026-07-11 GPX6941 - Jul 11, 04:50 UTCJul 11, 07:15 UTC2h 25m
2026-07-11 GPX6940 - Jul 11, 00:35 UTCJul 11, 03:30 UTC2h 55m
2026-07-10 GPX5731 - Jul 10, 18:25 UTCJul 10, 20:20 UTC1h 55m
2026-07-10 GPX5730 - Jul 10, 14:55 UTCJul 10, 17:15 UTC2h 20m
2026-07-09 GPX4211 - Jul 9, 12:10 UTCJul 9, 13:50 UTC1h 40m
2026-07-09 GPX4210 - Jul 9, 08:45 UTCJul 9, 11:00 UTC2h 15m
2026-07-08 GPX3261 - Jul 8, 18:55 UTCJul 8, 20:40 UTC1h 45m
2026-07-08 GPX3260 - Jul 8, 16:00 UTCJul 8, 18:10 UTC2h 10m
2026-07-08 GPX1815 - Jul 8, 13:05 UTCJul 8, 14:45 UTC1h 40m
2026-07-08 BVL9103 - Jul 8, 09:35 UTCJul 8, 11:55 UTC2h 20m
2026-07-08 BVL7766 - Jul 8, 07:50 UTCJul 8, 08:40 UTC50m
2026-07-08 BVL7767 - Jul 8, 06:25 UTCJul 8, 07:00 UTC35m
2026-07-07 GPX2871 - Jul 7, 13:00 UTCJul 7, 14:30 UTC1h 30m
2026-07-07 GPX2870 - Jul 7, 10:05 UTCJul 7, 11:55 UTC1h 50m
2026-07-06 GPX1261 - Jul 6, 18:20 UTCJul 6, 20:00 UTC1h 40m
2026-07-06 GPX1260 - Jul 6, 15:40 UTCJul 6, 17:35 UTC1h 55m
2026-07-06 GPX1193 - Jul 6, 13:20 UTCJul 6, 14:10 UTC50m
2026-07-06 GPX1192 - Jul 6, 10:15 UTCJul 6, 11:10 UTC55m
2026-07-06 BVL7768 - Jul 6, 08:40 UTCJul 6, 09:10 UTC30m
2026-07-06 BVL7765 - Jul 6, 07:15 UTCJul 6, 08:00 UTC45m
2026-07-06 BVL9902 - Jul 6, 04:50 UTCJul 6, 05:20 UTC30m
2026-07-05 GPX4VF - Jul 5, 19:15 UTCJul 5, 20:25 UTC1h 10m

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

Mode-S 451E8B frequently asked

What is Mode-S code 451E8B?
451E8B is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-FBA.
Where is Mode-S 451E8B registered?
Mode-S code 451E8B is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 451E8B broadcasting right now?
Yes. Mode-S 451E8B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 451E8B, octal 21217213, decimal 4,529,803.
What flights does 451E8B operate?
Mode-S 451E8B has broadcast 20 distinct callsigns, including GPX5ZP, GPX5PZ, GPX4HG, GPX4GH, GPX9RE.