Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

45CE49

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-SRI · BOEING 767-200

Hex
45CE49
Octal
21347111
Decimal
4,574,793
Country
DK
Tail
OY-SRI
Type
B762
No current signal · last broadcast 21d ago
Flights observed
59
Distinct callsigns
7
Country
DK
Last broadcast
21d ago

Last known position

Most recent position reported by Mode-S 45CE49.

Country allocation

The ICAO 24-bit address 45CE49 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 7 distinct

Callsign Airline Flights Last seen
SRR6645 Star Air 29 2026-04-30
SRR6646 Star Air 25 2026-04-30
UPS275 United Parcel Service 1 2026-05-07
UPS274 United Parcel Service 1 2026-05-07
SRR9082 - 1 2026-05-08
SRR7875 - 1 2026-05-04
SRR7874 - 1 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-08 SRR9082 - May 8, 10:39 UTCMay 8, 12:14 UTC1h 35m
2026-05-07 UPS275 VIE → CGN May 7, 20:55 UTCMay 7, 22:05 UTC1h 10m
2026-05-07 UPS274 CGN → BUD May 7, 02:15 UTCMay 7, 03:25 UTC1h 10m
2026-05-04 SRR7875 LYS → CGN May 4, 02:30 UTCMay 4, 03:30 UTC1h 0m
2026-05-04 SRR7874 - May 4, 00:00 UTCMay 4, 00:55 UTC55m
2026-04-30 SRR6645 OPO → LIS Apr 30, 20:15 UTCApr 30, 22:35 UTC2h 20m
2026-04-30 SRR6645 OPO → LIS Apr 30, 18:25 UTCApr 30, 19:00 UTC35m
2026-04-30 SRR6646 CGN → OPO Apr 30, 05:45 UTCApr 30, 06:15 UTC30m
2026-04-30 SRR6646 CGN → OPO Apr 30, 02:05 UTCApr 30, 04:15 UTC2h 10m
2026-04-29 SRR6645 OPO → LIS Apr 29, 20:20 UTCApr 29, 22:50 UTC2h 30m
2026-04-29 SRR6645 OPO → LIS Apr 29, 18:30 UTCApr 29, 19:15 UTC45m
2026-04-29 SRR6646 CGN → OPO Apr 29, 05:55 UTCApr 29, 06:39 UTC45m
2026-04-29 SRR6646 CGN → OPO Apr 29, 02:09 UTCApr 29, 04:25 UTC2h 15m
2026-04-28 SRR6645 OPO → LIS Apr 28, 20:00 UTCApr 28, 22:20 UTC2h 20m
2026-04-28 SRR6645 OPO → LIS Apr 28, 18:25 UTCApr 28, 18:55 UTC30m
2026-04-28 SRR6646 CGN → OPO Apr 28, 05:30 UTCApr 28, 06:10 UTC40m
2026-04-28 SRR6646 CGN → OPO Apr 28, 02:05 UTCApr 28, 04:25 UTC2h 20m
2026-04-27 SRR6645 OPO → LIS Apr 27, 20:05 UTCApr 27, 22:20 UTC2h 15m
2026-04-27 SRR6645 OPO → LIS Apr 27, 18:25 UTCApr 27, 18:50 UTC25m
2026-04-27 SRR6646 CGN → OPO Apr 27, 05:15 UTCApr 27, 05:55 UTC40m
2026-04-27 SRR6646 CGN → OPO Apr 27, 00:55 UTCApr 27, 03:10 UTC2h 15m
2026-04-24 SRR6645 OPO → LIS Apr 24, 20:05 UTCApr 24, 22:25 UTC2h 20m
2026-04-24 SRR6645 OPO → LIS Apr 24, 18:35 UTCApr 24, 19:05 UTC30m
2026-04-24 SRR6646 CGN → OPO Apr 24, 05:30 UTCApr 24, 06:10 UTC40m
2026-04-24 SRR6646 CGN → OPO Apr 24, 02:00 UTCApr 24, 04:10 UTC2h 10m
2026-04-23 SRR6645 OPO → LIS Apr 23, 20:15 UTCApr 23, 22:35 UTC2h 20m
2026-04-23 SRR6645 OPO → LIS Apr 23, 18:25 UTCApr 23, 19:00 UTC35m
2026-04-23 SRR6646 CGN → OPO Apr 23, 06:01 UTCApr 23, 06:35 UTC35m
2026-04-23 SRR6646 CGN → OPO Apr 23, 02:00 UTCApr 23, 04:20 UTC2h 20m
2026-04-21 SRR6645 OPO → LIS Apr 21, 20:15 UTCApr 21, 22:30 UTC2h 15m
2026-04-21 SRR6645 OPO → LIS Apr 21, 18:35 UTCApr 21, 19:10 UTC35m
2026-04-21 SRR6646 CGN → OPO Apr 21, 05:50 UTCApr 21, 06:25 UTC35m
2026-04-21 SRR6646 CGN → OPO Apr 21, 02:20 UTCApr 21, 04:35 UTC2h 15m
2026-04-20 SRR6645 OPO → LIS Apr 20, 20:05 UTCApr 20, 22:25 UTC2h 20m
2026-04-20 SRR6645 OPO → LIS Apr 20, 18:40 UTCApr 20, 19:05 UTC25m
2026-04-20 SRR6646 CGN → OPO Apr 20, 05:15 UTCApr 20, 05:55 UTC40m
2026-04-20 SRR6646 CGN → OPO Apr 20, 00:55 UTCApr 20, 03:20 UTC2h 25m
2026-04-16 SRR6645 OPO → LIS Apr 16, 23:20 UTCApr 16, 23:30 UTC10m
2026-04-16 SRR6645 OPO → LIS Apr 16, 21:20 UTCApr 16, 23:10 UTC1h 50m
2026-04-16 SRR6645 OPO → LIS Apr 16, 18:40 UTCApr 16, 19:05 UTC26m
2026-04-16 SRR6646 CGN → OPO Apr 16, 05:49 UTCApr 16, 06:25 UTC35m
2026-04-16 SRR6646 CGN → OPO Apr 16, 03:09 UTCApr 16, 04:29 UTC1h 20m
2026-04-16 SRR6646 CGN → OPO Apr 16, 02:15 UTCApr 16, 03:04 UTC50m
2026-04-15 SRR6645 OPO → LIS Apr 15, 21:05 UTCApr 15, 22:25 UTC1h 20m
2026-04-15 SRR6645 OPO → LIS Apr 15, 20:15 UTCApr 15, 21:00 UTC45m
2026-04-15 SRR6645 OPO → LIS Apr 15, 19:05 UTCApr 15, 19:15 UTC10m
2026-04-15 SRR6645 OPO → LIS Apr 15, 18:35 UTCApr 15, 19:00 UTC25m
2026-04-15 SRR6646 CGN → OPO Apr 15, 05:45 UTCApr 15, 06:20 UTC35m
2026-04-15 SRR6646 CGN → OPO Apr 15, 02:55 UTCApr 15, 04:25 UTC1h 30m
2026-04-15 SRR6646 CGN → OPO Apr 15, 02:10 UTCApr 15, 02:50 UTC40m

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

Mode-S 45CE49 frequently asked

What is Mode-S code 45CE49?
45CE49 is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-SRI.
Where is Mode-S 45CE49 registered?
Mode-S code 45CE49 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45CE49 broadcasting right now?
No active broadcast right now. Last signal was 21d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45CE49, octal 21347111, decimal 4,574,793.
What flights does 45CE49 operate?
Mode-S 45CE49 has broadcast 7 distinct callsigns, including SRR6645, SRR6646, UPS275, UPS274, SRR9082.