Apparatus

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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 Jul 24, 22:35 UTC
Flights observed
131
Distinct callsigns
10
Country
DK
Last broadcast
Jul 24, 22:35 UTC

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 10 distinct

Callsign Airline Flights Last seen
SRR6645 Star Air 62 2026-07-24
SRR6646 Star Air 57 2026-07-24
SRR6498 - 4 2026-07-07
SRR6497 - 2 2026-07-07
UPS275 United Parcel Service 1 2026-05-07
UPS274 United Parcel Service 1 2026-05-07
SRR9272 - 1 2026-06-27
SRR9082 - 1 2026-05-08
SRR7875 - 1 2026-05-04
SRR7874 - 1 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 SRR6645 OPO → LIS Jul 24, 20:20 UTCJul 24, 22:30 UTC2h 10m
2026-07-24 SRR6645 OPO → LIS Jul 24, 18:15 UTCJul 24, 18:50 UTC35m
2026-07-24 SRR6646 CGN → OPO Jul 24, 05:30 UTCJul 24, 06:05 UTC35m
2026-07-24 SRR6646 CGN → OPO Jul 24, 02:00 UTCJul 24, 04:20 UTC2h 20m
2026-07-23 SRR6645 OPO → LIS Jul 23, 20:20 UTCJul 23, 22:35 UTC2h 15m
2026-07-23 SRR6645 OPO → LIS Jul 23, 18:30 UTCJul 23, 19:05 UTC35m
2026-07-23 SRR6646 CGN → OPO Jul 23, 05:40 UTCJul 23, 06:15 UTC35m
2026-07-23 SRR6646 CGN → OPO Jul 23, 02:05 UTCJul 23, 04:15 UTC2h 10m
2026-07-22 SRR6645 OPO → LIS Jul 22, 20:40 UTCJul 22, 22:55 UTC2h 15m
2026-07-22 SRR6645 OPO → LIS Jul 22, 19:05 UTCJul 22, 19:30 UTC25m
2026-07-22 SRR6646 CGN → OPO Jul 22, 02:05 UTCJul 22, 04:25 UTC2h 20m
2026-07-21 SRR6645 OPO → LIS Jul 21, 20:20 UTCJul 21, 22:30 UTC2h 10m
2026-07-21 SRR6645 OPO → LIS Jul 21, 18:25 UTCJul 21, 18:55 UTC30m
2026-07-21 SRR6646 CGN → OPO Jul 21, 05:30 UTCJul 21, 06:05 UTC35m
2026-07-21 SRR6646 CGN → OPO Jul 21, 02:05 UTCJul 21, 04:10 UTC2h 5m
2026-07-17 SRR6645 OPO → CGN Jul 17, 20:04 UTCJul 17, 22:10 UTC2h 5m
2026-07-17 SRR6645 LIS → OPO Jul 17, 18:34 UTCJul 17, 19:00 UTC25m
2026-07-17 SRR6646 CGN → OPO Jul 17, 05:50 UTCJul 17, 06:29 UTC40m
2026-07-17 SRR6646 CGN → OPO Jul 17, 02:10 UTCJul 17, 04:29 UTC2h 20m
2026-07-16 SRR6645 OPO → CGN Jul 16, 20:09 UTCJul 16, 22:30 UTC2h 20m
2026-07-16 SRR6645 - Jul 16, 18:34 UTCJul 16, 19:05 UTC30m
2026-07-16 SRR6645 LIS → LIS Jul 16, 18:19 UTCJul 16, 18:25 UTC5m
2026-07-16 SRR6646 OPO → LIS Jul 16, 06:00 UTCJul 16, 06:35 UTC35m
2026-07-16 SRR6646 - Jul 16, 02:25 UTCJul 16, 04:40 UTC2h 15m
2026-07-14 SRR6645 - Jul 14, 20:10 UTCJul 14, 22:25 UTC2h 15m
2026-07-14 SRR6645 LIS → OPO Jul 14, 18:25 UTCJul 14, 18:50 UTC25m
2026-07-14 SRR6646 - Jul 14, 06:10 UTCJul 14, 06:45 UTC35m
2026-07-14 SRR6646 OPO → OPO Jul 14, 05:55 UTCJul 14, 06:00 UTC5m
2026-07-14 SRR6646 CGN → OPO Jul 14, 02:30 UTCJul 14, 04:45 UTC2h 15m
2026-07-13 SRR6645 OPO → CGN Jul 13, 20:25 UTCJul 13, 22:35 UTC2h 10m
2026-07-13 SRR6645 LIS → OPO Jul 13, 18:25 UTCJul 13, 19:00 UTC35m
2026-07-13 SRR6646 OPO → LIS Jul 13, 05:15 UTCJul 13, 05:45 UTC30m
2026-07-13 SRR6646 CGN → OPO Jul 13, 00:50 UTCJul 13, 03:05 UTC2h 15m
2026-07-10 SRR6645 OPO → CGN Jul 10, 20:15 UTCJul 10, 22:30 UTC2h 15m
2026-07-10 SRR6645 LIS → OPO Jul 10, 18:40 UTCJul 10, 19:10 UTC30m
2026-07-10 SRR6646 OPO → LIS Jul 10, 05:35 UTCJul 10, 06:10 UTC35m
2026-07-10 SRR6646 CGN → OPO Jul 10, 02:10 UTCJul 10, 04:15 UTC2h 5m
2026-07-09 SRR6645 - Jul 9, 20:10 UTCJul 9, 22:20 UTC2h 10m
2026-07-09 SRR6645 LIS → OPO Jul 9, 18:40 UTCJul 9, 19:10 UTC30m
2026-07-09 SRR6646 OPO → LIS Jul 9, 05:35 UTCJul 9, 06:10 UTC35m
2026-07-09 SRR6646 CGN → OPO Jul 9, 02:10 UTCJul 9, 04:15 UTC2h 5m
2026-07-08 SRR6645 OPO → CGN Jul 8, 20:10 UTCJul 8, 22:30 UTC2h 20m
2026-07-08 SRR6645 LIS → OPO Jul 8, 18:30 UTCJul 8, 19:00 UTC30m
2026-07-08 SRR6646 - Jul 8, 05:35 UTCJul 8, 06:10 UTC35m
2026-07-08 SRR6646 CGN → OPO Jul 8, 02:10 UTCJul 8, 04:15 UTC2h 5m
2026-07-07 SRR6497 - Jul 7, 20:05 UTCJul 7, 21:15 UTC1h 10m
2026-07-07 SRR6498 - Jul 7, 04:15 UTCJul 7, 04:45 UTC30m
2026-07-07 SRR6498 - Jul 7, 02:10 UTCJul 7, 03:05 UTC55m
2026-07-06 SRR6645 OPO → CGN Jul 6, 20:15 UTCJul 6, 22:35 UTC2h 20m
2026-07-06 SRR6645 LIS → OPO Jul 6, 18:25 UTCJul 6, 18:55 UTC30m

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 Jul 24, 22:35 UTC.
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 10 distinct callsigns, including SRR6645, SRR6646, SRR6498, SRR6497, UPS275.