Apparatus

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sensors Mode-S transponder

42450D

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to VQ-BLZ · EMBRAER ERJ-190-100

Hex
42450D
Octal
20442415
Decimal
4,343,053
Country
GB
Tail
VQ-BLZ
Type
E190
No current signal · last broadcast 9h ago
Flights observed
111
Distinct callsigns
16
Country
GB
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 42450D.

Country allocation

The ICAO 24-bit address 42450D falls within the block assigned to United Kingdom (GB) by ICAO Annex 10, Volume III. Every aircraft registered in United Kingdom 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 16 distinct

Callsign Airline Flights Last seen
BMA604 bmi 20 2026-05-29
BMA603 bmi 20 2026-05-28
BMA301 bmi 14 2026-05-28
BMA302 bmi 13 2026-05-28
BMA801 bmi 7 2026-05-29
BMA802 bmi 6 2026-05-29
BMA752 bmi 5 2026-05-23
BMA241 bmi 5 2026-05-17
BMA240 bmi 5 2026-05-17
BMA751 bmi 4 2026-05-23
BMA224 bmi 3 2026-05-18
BMA414 bmi 2 2026-05-21
BMA413 bmi 2 2026-05-21
BMA223 bmi 2 2026-05-17
BMA102 bmi 2 2026-04-25
BMA303 - 1 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BMA802 YHZ → BDA May 29, 20:30 UTCMay 29, 20:40 UTC10m
2026-05-29 BMA802 YHZ → BDA May 29, 18:45 UTCMay 29, 19:15 UTC30m
2026-05-29 BMA801 BDA → YHZ May 29, 17:05 UTCMay 29, 17:25 UTC20m
2026-05-29 BMA801 BDA → YHZ May 29, 15:15 UTCMay 29, 15:20 UTC5m
2026-05-29 BMA604 YYZ → BDA May 29, 13:10 UTCMay 29, 13:20 UTC10m
2026-05-29 BMA604 YYZ → BDA May 29, 11:10 UTCMay 29, 12:15 UTC1h 5m
2026-05-28 BMA603 BDA → YYZ May 28, 23:35 UTCMay 29, 01:00 UTC1h 25m
2026-05-28 BMA603 BDA → YYZ May 28, 22:15 UTCMay 28, 22:20 UTC5m
2026-05-28 BMA302 BOS → BDA May 28, 16:45 UTCMay 28, 16:55 UTC10m
2026-05-28 BMA302 BOS → BDA May 28, 15:15 UTCMay 28, 15:45 UTC30m
2026-05-28 BMA301 BDA → BOS May 28, 13:00 UTCMay 28, 13:45 UTC45m
2026-05-28 BMA301 BDA → BOS May 28, 11:45 UTCMay 28, 11:50 UTC5m
2026-05-26 BMA604 YYZ → BDA May 26, 13:19 UTCMay 26, 13:29 UTC10m
2026-05-26 BMA604 YYZ → BDA May 26, 11:15 UTCMay 26, 12:20 UTC1h 5m
2026-05-25 BMA603 BDA → YYZ May 25, 23:04 UTCMay 26, 00:29 UTC1h 25m
2026-05-25 BMA603 BDA → YYZ May 25, 21:45 UTCMay 25, 22:00 UTC15m
2026-05-25 BMA302 BOS → BDA May 25, 17:15 UTCMay 25, 17:25 UTC10m
2026-05-25 BMA302 BOS → BDA May 25, 15:45 UTCMay 25, 16:15 UTC30m
2026-05-25 BMA301 BDA → BOS May 25, 13:45 UTCMay 25, 14:30 UTC45m
2026-05-25 BMA301 BDA → BOS May 25, 12:30 UTCMay 25, 12:40 UTC10m
2026-05-23 BMA752 MCO → BDA May 23, 21:40 UTCMay 23, 21:50 UTC10m
2026-05-23 BMA752 MCO → BDA May 23, 19:30 UTCMay 23, 20:05 UTC35m
2026-05-23 BMA751 BDA → MCO May 23, 15:35 UTCMay 23, 17:55 UTC2h 20m
2026-05-22 BMA604 YYZ → BDA May 22, 18:20 UTCMay 22, 18:30 UTC10m
2026-05-22 BMA604 YYZ → BDA May 22, 16:15 UTCMay 22, 17:20 UTC1h 5m
2026-05-22 BMA603 BDA → YYZ May 22, 13:10 UTCMay 22, 14:35 UTC1h 25m
2026-05-22 BMA603 BDA → YYZ May 22, 11:50 UTCMay 22, 12:05 UTC15m
2026-05-22 BMA802 YHZ → BDA May 22, 01:05 UTCMay 22, 01:15 UTC10m
2026-05-21 BMA802 YHZ → BDA May 21, 23:15 UTCMay 21, 23:35 UTC20m
2026-05-21 BMA801 BDA → YHZ May 21, 21:30 UTCMay 21, 21:50 UTC20m
2026-05-21 BMA801 BDA → YHZ May 21, 19:50 UTCMay 21, 20:00 UTC10m
2026-05-21 BMA414 YUL → BDA May 21, 17:30 UTCMay 21, 17:40 UTC10m
2026-05-21 BMA414 YUL → BDA May 21, 15:30 UTCMay 21, 16:30 UTC1h 0m
2026-05-21 BMA413 BDA → YUL May 21, 12:50 UTCMay 21, 14:05 UTC1h 15m
2026-05-21 BMA413 BDA → YUL May 21, 11:40 UTCMay 21, 11:45 UTC5m
2026-05-20 BMA604 YYZ → BDA May 20, 17:50 UTCMay 20, 18:00 UTC10m
2026-05-20 BMA604 YYZ → BDA May 20, 15:35 UTCMay 20, 16:45 UTC1h 10m
2026-05-19 BMA603 BDA → YYZ May 19, 13:10 UTCMay 19, 14:35 UTC1h 25m
2026-05-19 BMA603 BDA → YYZ May 19, 11:55 UTCMay 19, 12:05 UTC10m
2026-05-19 BMA302 BOS → BDA May 19, 00:10 UTCMay 19, 00:20 UTC10m
2026-05-18 BMA302 BOS → BDA May 18, 22:40 UTCMay 18, 23:15 UTC35m
2026-05-18 BMA301 BDA → BOS May 18, 20:30 UTCMay 18, 21:15 UTC45m
2026-05-18 BMA301 BDA → BOS May 18, 19:15 UTCMay 18, 19:25 UTC10m
2026-05-18 BMA604 YYZ → BDA May 18, 17:30 UTCMay 18, 17:40 UTC10m
2026-05-18 BMA604 YYZ → BDA May 18, 15:20 UTCMay 18, 16:30 UTC1h 10m
2026-05-18 BMA603 BDA → YYZ May 18, 12:45 UTCMay 18, 14:05 UTC1h 20m
2026-05-18 BMA603 BDA → YYZ May 18, 11:30 UTCMay 18, 11:40 UTC10m
2026-05-18 BMA224 HPN → BDA May 18, 00:00 UTCMay 18, 00:10 UTC10m
2026-05-17 BMA224 HPN → BDA May 17, 22:30 UTCMay 17, 22:55 UTC25m
2026-05-17 BMA223 BDA → HPN May 17, 20:20 UTCMay 17, 21:05 UTC45m

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 VQ-BLZ page for operator, model, and routing details .

Mode-S 42450D frequently asked

What is Mode-S code 42450D?
42450D is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to VQ-BLZ.
Where is Mode-S 42450D registered?
Mode-S code 42450D is allocated to United Kingdom (GB). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 42450D broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 42450D, octal 20442415, decimal 4,343,053.
What flights does 42450D operate?
Mode-S 42450D has broadcast 16 distinct callsigns, including BMA604, BMA603, BMA301, BMA302, BMA801.