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 Jul 26, 19:35 UTC
Flights observed
213
Distinct callsigns
18
Country
GB
Last broadcast
Jul 26, 19:35 UTC

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 18 distinct

Callsign Airline Flights Last seen
BMA301 - 40 2026-07-23
BMA604 bmi 38 2026-07-25
BMA603 bmi 38 2026-07-24
BMA302 - 26 2026-07-21
BMA413 bmi 8 2026-07-26
BMA801 bmi 7 2026-05-29
BMA751 - 7 2026-06-30
BMA802 bmi 6 2026-05-29
BMA224 - 6 2026-07-07
BMA223 bmi 6 2026-06-23
BMA752 bmi 5 2026-05-23
BMA303 - 5 2026-07-12
BMA241 bmi 5 2026-05-17
BMA240 bmi 5 2026-05-17
BMA552 bmi 3 2026-06-13
BMA551 bmi 3 2026-06-29
BMA414 bmi 3 2026-07-26
BMA102 bmi 2 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BMA414 YUL → BDA Jul 26, 18:25 UTCJul 26, 19:35 UTC1h 10m
2026-07-26 BMA413 BDA → YUL Jul 26, 15:50 UTCJul 26, 16:55 UTC1h 5m
2026-07-25 BMA413 BDA → YUL Jul 25, 19:50 UTCJul 26, 16:55 UTC21h 6m
2026-07-25 BMA604 YYZ → BDA Jul 25, 11:05 UTCJul 25, 18:20 UTC7h 15m
2026-07-24 BMA603 BDA → YYZ Jul 24, 18:55 UTCJul 25, 00:50 UTC5h 55m
2026-07-24 BMA604 YYZ → BOS Jul 24, 11:15 UTCJul 24, 17:30 UTC6h 15m
2026-07-23 BMA603 BDA → YYZ Jul 23, 23:25 UTCJul 24, 05:40 UTC6h 15m
2026-07-23 BMA413 BOS → YUL Jul 23, 14:50 UTCJul 23, 21:10 UTC6h 20m
2026-07-23 BMA301 - Jul 23, 12:30 UTCJul 23, 13:15 UTC45m
2026-07-21 BMA302 - Jul 21, 15:00 UTCJul 21, 15:35 UTC35m
2026-07-20 BMA301 - Jul 20, 19:20 UTCJul 21, 13:45 UTC18h 24m
2026-07-20 BMA604 YYZ → BWI Jul 20, 11:25 UTCJul 20, 17:30 UTC6h 5m
2026-07-19 BMA603 BDA → YYZ Jul 19, 15:15 UTCJul 20, 00:30 UTC9h 15m
2026-07-19 BMA413 - Jul 19, 12:30 UTCJul 19, 13:45 UTC1h 15m
2026-07-18 BMA413 BOS → YUL Jul 18, 16:35 UTCJul 19, 13:45 UTC21h 10m
2026-07-18 BMA301 - Jul 18, 14:30 UTCJul 18, 15:20 UTC50m
2026-07-17 BMA301 BOS → BOS Jul 17, 18:29 UTCJul 18, 15:20 UTC20h 51m
2026-07-17 BMA604 YYZ → BOS Jul 17, 11:15 UTCJul 17, 17:09 UTC5h 55m
2026-07-16 BMA603 BOS → YYZ Jul 16, 18:15 UTCJul 17, 00:35 UTC6h 20m
2026-07-16 BMA604 YYZ → BOS Jul 16, 11:10 UTCJul 16, 16:49 UTC5h 40m
2026-07-15 BMA603 - Jul 15, 23:20 UTCJul 16, 00:45 UTC1h 25m
2026-07-15 BMA302 - Jul 15, 14:45 UTCJul 15, 23:15 UTC8h 30m
2026-07-15 BMA301 - Jul 15, 12:30 UTCJul 15, 13:25 UTC55m
2026-07-14 BMA604 - Jul 14, 11:15 UTCJul 14, 12:35 UTC1h 20m
2026-07-13 BMA603 BOS → YYZ Jul 13, 14:40 UTCJul 14, 00:40 UTC10h 0m
2026-07-12 BMA301 BOS → BOS Jul 12, 23:15 UTCJul 13, 13:25 UTC14h 10m
2026-07-12 BMA303 - Jul 12, 20:50 UTCJul 12, 21:40 UTC50m
2026-07-07 BMA224 - Jul 7, 22:20 UTCJul 7, 23:00 UTC40m
2026-07-07 BMA302 BOS → HPN Jul 7, 14:50 UTCJul 7, 21:00 UTC6h 10m
2026-07-06 BMA301 - Jul 6, 19:20 UTCJul 7, 13:30 UTC18h 10m
2026-07-06 BMA301 - Jul 6, 19:00 UTCJul 7, 13:30 UTC18h 30m
2026-07-06 BMA604 YYZ → BWI Jul 6, 11:45 UTCJul 6, 17:20 UTC5h 35m
2026-07-05 BMA603 YUL → YYZ Jul 5, 15:15 UTCJul 6, 00:35 UTC9h 20m
2026-07-05 BMA413 - Jul 5, 12:35 UTCJul 5, 13:50 UTC1h 15m
2026-07-04 BMA302 - Jul 4, 14:55 UTCJul 5, 13:15 UTC22h 20m
2026-07-03 BMA301 - Jul 3, 19:10 UTCJul 4, 13:15 UTC18h 5m
2026-07-03 BMA604 - Jul 3, 11:55 UTCJul 3, 17:50 UTC5h 55m
2026-07-02 BMA603 BOS → YYZ Jul 2, 15:05 UTCJul 3, 01:00 UTC9h 55m
2026-07-01 BMA301 - Jul 1, 21:20 UTCJul 2, 13:20 UTC16h 0m
2026-06-30 BMA751 FLL → MCO Jun 30, 23:40 UTCJul 1, 00:30 UTC50m
2026-06-30 BMA751 - Jun 30, 17:10 UTCJun 30, 19:05 UTC1h 55m
2026-06-29 BMA751 - Jun 29, 19:20 UTCJun 30, 19:05 UTC23h 46m
2026-06-29 BMA551 BDA → BWI Jun 29, 16:50 UTCJun 29, 17:34 UTC45m
2026-06-29 BMA604 - Jun 29, 11:25 UTCJun 29, 12:29 UTC1h 5m
2026-06-28 BMA603 - Jun 28, 23:25 UTCJun 29, 00:49 UTC1h 25m
2026-06-27 BMA302 - Jun 27, 14:54 UTCJun 27, 15:30 UTC35m
2026-06-26 BMA301 - Jun 26, 19:20 UTCJun 27, 13:24 UTC18h 5m
2026-06-26 BMA301 - Jun 26, 19:14 UTCJun 27, 13:24 UTC18h 10m
2026-06-26 BMA604 - Jun 26, 11:40 UTCJun 26, 17:59 UTC6h 20m
2026-06-25 BMA603 YYZ → YYZ Jun 25, 11:35 UTCJun 26, 00:30 UTC12h 55m

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 Jul 26, 19:35 UTC.
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 18 distinct callsigns, including BMA301, BMA604, BMA603, BMA302, BMA413.