Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

45CE57

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-SRW · BOEING 767-300

Hex
45CE57
Octal
21347127
Decimal
4,574,807
Country
DK
Tail
OY-SRW
Type
B763
No current signal · last broadcast 8h ago
Flights observed
109
Distinct callsigns
10
Country
DK
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 45CE57.

Country allocation

The ICAO 24-bit address 45CE57 falls within the block assigned to Denmark (DK) by ICAO Annex 10, Volume III. Every aircraft registered in Denmark 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 10 distinct

Callsign Airline Flights Last seen
SRR6316 Star Air 29 2026-05-28
SRR6315 Star Air 29 2026-05-28
SRR6373 Star Air 23 2026-05-29
SRR6374 Star Air 17 2026-05-29
SRR6498 Star Air 4 2026-04-21
SRR6497 Star Air 3 2026-04-21
UPS275 United Parcel Service 1 2026-05-08
UPS274 United Parcel Service 1 2026-05-08
SRR9281 - 1 2026-04-28
SRR9221 - 1 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SRR6373 TLS → CGN May 29, 20:35 UTCMay 29, 21:30 UTC55m
2026-05-29 SRR6373 TLS → CGN May 29, 18:30 UTCMay 29, 19:10 UTC40m
2026-05-29 SRR6374 CGN → TLS May 29, 03:55 UTCMay 29, 04:35 UTC40m
2026-05-29 SRR6374 CGN → TLS May 29, 01:50 UTCMay 29, 02:50 UTC1h 0m
2026-05-28 SRR6315 CDG → CGN May 28, 21:50 UTCMay 28, 22:50 UTC1h 0m
2026-05-28 SRR6315 CDG → CGN May 28, 19:35 UTCMay 28, 20:30 UTC55m
2026-05-28 SRR6316 CGN → CDG May 28, 04:05 UTCMay 28, 05:00 UTC55m
2026-05-28 SRR6316 CGN → CDG May 28, 00:35 UTCMay 28, 01:20 UTC45m
2026-05-27 SRR6373 TLS → CGN May 27, 20:25 UTCMay 27, 21:15 UTC50m
2026-05-27 SRR6373 TLS → CGN May 27, 18:25 UTCMay 27, 19:05 UTC40m
2026-05-27 SRR6374 CGN → TLS May 27, 04:14 UTCMay 27, 04:55 UTC40m
2026-05-27 SRR6374 CGN → TLS May 27, 01:59 UTCMay 27, 02:54 UTC55m
2026-05-26 SRR6315 CDG → CGN May 26, 21:55 UTCMay 26, 22:35 UTC40m
2026-05-26 SRR6315 CDG → CGN May 26, 19:55 UTCMay 26, 20:50 UTC55m
2026-05-26 SRR6316 CGN → CDG May 26, 03:40 UTCMay 26, 04:35 UTC55m
2026-05-26 SRR6316 CGN → CDG May 26, 00:39 UTCMay 26, 01:30 UTC50m
2026-05-22 SRR6315 CDG → CGN May 22, 21:50 UTCMay 22, 22:45 UTC55m
2026-05-22 SRR6315 CDG → CGN May 22, 19:40 UTCMay 22, 20:35 UTC55m
2026-05-22 SRR6316 CGN → CDG May 22, 03:30 UTCMay 22, 04:20 UTC50m
2026-05-22 SRR6316 CGN → CDG May 22, 00:40 UTCMay 22, 01:25 UTC45m
2026-05-21 SRR6373 TLS → CGN May 21, 20:20 UTCMay 21, 21:30 UTC1h 10m
2026-05-21 SRR6373 TLS → CGN May 21, 18:25 UTCMay 21, 19:05 UTC40m
2026-05-21 SRR6374 CGN → TLS May 21, 03:55 UTCMay 21, 04:40 UTC45m
2026-05-21 SRR6374 CGN → TLS May 21, 01:55 UTCMay 21, 02:45 UTC50m
2026-05-20 SRR6315 CDG → CGN May 20, 21:50 UTCMay 20, 22:50 UTC1h 0m
2026-05-20 SRR6315 CDG → CGN May 20, 19:30 UTCMay 20, 20:25 UTC55m
2026-05-20 SRR6316 CGN → CDG May 20, 03:35 UTCMay 20, 04:25 UTC50m
2026-05-20 SRR6316 CGN → CDG May 20, 00:35 UTCMay 20, 01:20 UTC45m
2026-05-19 SRR6373 TLS → CGN May 19, 20:30 UTCMay 19, 21:50 UTC1h 20m
2026-05-19 SRR6373 TLS → CGN May 19, 18:35 UTCMay 19, 19:20 UTC45m
2026-05-19 SRR6374 CGN → TLS May 19, 04:00 UTCMay 19, 04:45 UTC45m
2026-05-19 SRR6374 CGN → TLS May 19, 01:50 UTCMay 19, 02:50 UTC1h 0m
2026-05-18 SRR6315 CDG → CGN May 18, 21:55 UTCMay 18, 22:45 UTC50m
2026-05-18 SRR6315 CDG → CGN May 18, 19:45 UTCMay 18, 20:45 UTC1h 0m
2026-05-18 SRR6316 CGN → CDG May 18, 02:25 UTCMay 18, 03:15 UTC50m
2026-05-17 SRR6316 CGN → CDG May 17, 22:50 UTCMay 17, 23:35 UTC45m
2026-05-15 SRR6315 CDG → CGN May 15, 21:50 UTCMay 15, 22:45 UTC55m
2026-05-15 SRR6315 CDG → CGN May 15, 19:35 UTCMay 15, 20:35 UTC1h 0m
2026-05-15 SRR6316 CGN → CDG May 15, 03:35 UTCMay 15, 04:25 UTC50m
2026-05-15 SRR6316 CGN → CDG May 15, 00:30 UTCMay 15, 01:10 UTC40m
2026-05-13 SRR6315 CDG → CGN May 13, 21:45 UTCMay 13, 22:45 UTC1h 0m
2026-05-13 SRR6315 CDG → CGN May 13, 19:30 UTCMay 13, 20:30 UTC1h 0m
2026-05-13 SRR6316 CGN → CDG May 13, 03:50 UTCMay 13, 04:35 UTC45m
2026-05-13 SRR6316 CGN → CDG May 13, 00:35 UTCMay 13, 01:15 UTC40m
2026-05-12 SRR6373 TLS → CGN May 12, 20:20 UTCMay 12, 21:25 UTC1h 5m
2026-05-12 SRR6373 TLS → CGN May 12, 18:30 UTCMay 12, 19:15 UTC45m
2026-05-12 SRR6374 CGN → TLS May 12, 03:50 UTCMay 12, 04:35 UTC45m
2026-05-11 SRR6315 CDG → CGN May 11, 21:50 UTCMay 11, 22:35 UTC44m
2026-05-11 SRR6315 CDG → CGN May 11, 19:40 UTCMay 11, 20:40 UTC1h 0m
2026-05-11 SRR6316 CGN → CDG May 11, 02:20 UTCMay 11, 03:15 UTC55m

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 OY-SRW page for operator, model, and routing details .

Mode-S 45CE57 frequently asked

What is Mode-S code 45CE57?
45CE57 is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-SRW.
Where is Mode-S 45CE57 registered?
Mode-S code 45CE57 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45CE57 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45CE57, octal 21347127, decimal 4,574,807.
What flights does 45CE57 operate?
Mode-S 45CE57 has broadcast 10 distinct callsigns, including SRR6316, SRR6315, SRR6373, SRR6374, SRR6498.