Apparatus

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sensors Mode-S transponder

45216E

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-CRI · BOEING 737-400

Hex
45216E
Octal
21220556
Decimal
4,530,542
Country
BG
Tail
LZ-CRI
Type
B734
No current signal · last broadcast Jul 26, 20:00 UTC
Flights observed
369
Distinct callsigns
20
Country
BG
Last broadcast
Jul 26, 20:00 UTC

Last known position

Most recent position reported by Mode-S 45216E.

Country allocation

The ICAO 24-bit address 45216E 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
GPX2MI GP Aviation 56 2026-07-22
GPX2IM GP Aviation 55 2026-07-22
GPX1BL GP Aviation 48 2026-07-24
GPX1LB GP Aviation 46 2026-07-25
GPX601 GP Aviation 32 2026-07-21
GPX600 GP Aviation 32 2026-07-24
GPX701 GP Aviation 14 2026-07-22
GPX700 GP Aviation 14 2026-07-22
GPX3JX - 11 2026-06-23
GPX3XJ - 10 2026-06-23
GPX7JE - 6 2026-07-24
GPX7EJ - 6 2026-07-25
GPX7960 GP Aviation 5 2026-07-19
GPX7961 GP Aviation 4 2026-07-19
GPX605 GP Aviation 4 2026-07-26
GPX604 GP Aviation 4 2026-07-25
GPX807 GP Aviation 2 2026-07-26
GPX6YN - 2 2026-04-13
GPX603 GP Aviation 2 2026-07-18
GPX602 GP Aviation 2 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GPX807 BSL → PRN Jul 26, 18:40 UTCJul 26, 20:00 UTC1h 20m
2026-07-26 GPX7113 OHD → BSL Jul 26, 12:40 UTCJul 26, 17:10 UTC4h 30m
2026-07-26 GPX605 ZRH → PRN Jul 26, 06:30 UTCJul 26, 11:35 UTC5h 6m
2026-07-25 GPX604 PRN → ZRH Jul 25, 18:55 UTCJul 26, 05:00 UTC10h 5m
2026-07-25 GPX1LB BSL → PRN Jul 25, 12:50 UTCJul 25, 17:55 UTC5h 5m
2026-07-25 GPX7EJ - Jul 25, 06:30 UTCJul 25, 11:40 UTC5h 10m
2026-07-24 GPX7JE - Jul 24, 19:10 UTCJul 25, 05:05 UTC9h 55m
2026-07-24 GPX600 PRN → ZRH Jul 24, 15:55 UTCJul 24, 17:40 UTC1h 45m
2026-07-24 GPX1LB BSL → PRN Jul 24, 13:00 UTCJul 24, 14:40 UTC1h 40m
2026-07-24 GPX1BL PRN → BSL Jul 24, 09:50 UTCJul 24, 11:40 UTC1h 50m
2026-07-24 GPX605 ZRH → PRN Jul 24, 06:30 UTCJul 24, 07:50 UTC1h 20m
2026-07-24 GPX604 PRN → ZRH Jul 24, 03:45 UTCJul 24, 05:30 UTC1h 45m
2026-07-23 GPX1LB BSL → PRN Jul 23, 19:25 UTCJul 23, 20:55 UTC1h 30m
2026-07-23 GPX4113 OHD → BSL Jul 23, 16:05 UTCJul 23, 18:05 UTC2h 0m
2026-07-23 GPX4112 BSL → OHD Jul 23, 13:20 UTCJul 23, 14:50 UTC1h 30m
2026-07-23 GPX1BL PRN → BSL Jul 23, 10:05 UTCJul 23, 12:10 UTC2h 5m
2026-07-22 GPX2IM BSL → PRN Jul 22, 18:30 UTCJul 22, 20:00 UTC1h 30m
2026-07-22 GPX2MI PRN → BSL Jul 22, 15:25 UTCJul 22, 17:20 UTC1h 55m
2026-07-22 GPX701 GVA → PRN Jul 22, 12:20 UTCJul 22, 13:55 UTC1h 35m
2026-07-22 GPX700 PRN → GVA Jul 22, 10:20 UTCJul 22, 11:20 UTC1h 0m
2026-07-21 GPX601 ZRH → PRN Jul 21, 19:30 UTCJul 21, 21:00 UTC1h 30m
2026-07-21 GPX600 PRN → ZRH Jul 21, 18:25 UTCJul 21, 18:30 UTC5m
2026-07-21 GPX600 PRN → ZRH Jul 21, 16:35 UTCJul 21, 18:20 UTC1h 45m
2026-07-21 GPX1LB BSL → PRN Jul 21, 13:30 UTCJul 21, 15:00 UTC1h 30m
2026-07-21 GPX1BL PRN → BSL Jul 21, 10:40 UTCJul 21, 12:30 UTC1h 50m
2026-07-20 GPX2IM BSL → PRN Jul 20, 19:40 UTCJul 20, 21:15 UTC1h 35m
2026-07-20 GPX2MI PRN → BSL Jul 20, 16:25 UTCJul 20, 18:35 UTC2h 10m
2026-07-20 GPX1LB BSL → PRN Jul 20, 13:25 UTCJul 20, 15:05 UTC1h 40m
2026-07-20 GPX1BL PRN → BSL Jul 20, 10:05 UTCJul 20, 12:05 UTC2h 0m
2026-07-19 GPX601 - Jul 19, 19:25 UTCJul 19, 20:55 UTC1h 30m
2026-07-19 GPX600 PRN → ZRH Jul 19, 16:20 UTCJul 19, 18:20 UTC2h 0m
2026-07-19 GPX1LB BSL → PRN Jul 19, 13:10 UTCJul 19, 14:45 UTC1h 35m
2026-07-19 GPX1BL PRN → BSL Jul 19, 10:05 UTCJul 19, 11:55 UTC1h 50m
2026-07-19 GPX7961 HEL → PRN Jul 19, 05:35 UTCJul 19, 08:25 UTC2h 50m
2026-07-19 GPX7960 PRN → HEL Jul 19, 01:10 UTCJul 19, 03:45 UTC2h 35m
2026-07-18 GPX603 ZRH → PRN Jul 18, 21:15 UTCJul 18, 22:45 UTC1h 30m
2026-07-18 GPX602 PRN → ZRH Jul 18, 18:25 UTCJul 18, 20:20 UTC1h 55m
2026-07-18 GPX1LB BSL → PRN Jul 18, 15:40 UTCJul 18, 17:25 UTC1h 45m
2026-07-18 GPX1BL PRN → BSL Jul 18, 09:50 UTCJul 18, 11:45 UTC1h 55m
2026-07-18 GPX7EJ - Jul 18, 06:10 UTCJul 18, 08:30 UTC2h 20m
2026-07-18 GPX7JE - Jul 18, 02:05 UTCJul 18, 04:30 UTC2h 26m
2026-07-17 GPX2IM - Jul 17, 18:25 UTCJul 17, 19:49 UTC1h 25m
2026-07-17 GPX2MI - Jul 17, 15:20 UTCJul 17, 17:05 UTC1h 45m
2026-07-17 GPX701 - Jul 17, 12:15 UTCJul 17, 13:45 UTC1h 30m
2026-07-17 GPX700 - Jul 17, 08:59 UTCJul 17, 11:00 UTC2h 0m
2026-07-16 GPX1LB - Jul 16, 19:40 UTCJul 16, 21:10 UTC1h 30m
2026-07-16 GPX4113 - Jul 16, 16:19 UTCJul 16, 18:25 UTC2h 5m
2026-07-16 GPX4112 - Jul 16, 13:15 UTCJul 16, 15:00 UTC1h 45m
2026-07-16 GPX1BL - Jul 16, 09:55 UTCJul 16, 11:54 UTC2h 0m
2026-07-15 GPX2IM - Jul 15, 19:15 UTCJul 15, 20:45 UTC1h 30m

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

Mode-S 45216E frequently asked

What is Mode-S code 45216E?
45216E is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-CRI.
Where is Mode-S 45216E registered?
Mode-S code 45216E is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45216E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45216E, octal 21220556, decimal 4,530,542.
What flights does 45216E operate?
Mode-S 45216E has broadcast 20 distinct callsigns, including GPX2MI, GPX2IM, GPX1BL, GPX1LB, GPX601.