Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

45CE4D

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-SRM · BOEING 767-200

Hex
45CE4D
Octal
21347115
Decimal
4,574,797
Country
DK
Tail
OY-SRM
Type
B762
No current signal · last broadcast 10h ago
Flights observed
86
Distinct callsigns
17
Country
DK
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 45CE4D.

Country allocation

The ICAO 24-bit address 45CE4D 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 17 distinct

Callsign Airline Flights Last seen
SRR6646 Star Air 23 2026-06-05
SRR6645 Star Air 23 2026-06-05
SRR6382 Star Air 8 2026-06-04
SRR6381 Star Air 8 2026-06-04
UPS260 United Parcel Service 5 2026-05-08
UPS259 United Parcel Service 4 2026-05-08
SRR6978 Star Air 2 2026-05-07
SRR6977 Star Air 2 2026-05-07
MUK6978 - 2 2026-05-07
MUK6977 - 2 2026-05-07
SRR7002 - 1 2026-04-15
SRR7001 - 1 2026-04-15
SRR6566 Star Air 1 2026-05-06
SRR6565 Star Air 1 2026-05-06
SRR259 Star Air 1 2026-04-28
MUK6566 - 1 2026-05-06
MUK6565 - 1 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-05 SRR6645 OPO → LIS Jun 5, 20:15 UTCJun 5, 22:35 UTC2h 20m
2026-06-05 SRR6645 OPO → LIS Jun 5, 18:40 UTCJun 5, 19:10 UTC30m
2026-06-05 SRR6646 CGN → OPO Jun 5, 05:40 UTCJun 5, 06:20 UTC40m
2026-06-05 SRR6646 CGN → OPO Jun 5, 02:00 UTCJun 5, 04:15 UTC2h 15m
2026-06-04 SRR6381 MRS → CGN Jun 4, 20:25 UTCJun 4, 21:45 UTC1h 20m
2026-06-04 SRR6382 CGN → BOD Jun 4, 02:05 UTCJun 4, 03:25 UTC1h 20m
2026-06-03 SRR6645 OPO → LIS Jun 3, 20:55 UTCJun 3, 23:25 UTC2h 30m
2026-06-03 SRR6646 CGN → OPO Jun 3, 02:25 UTCJun 3, 04:40 UTC2h 15m
2026-06-02 SRR6645 OPO → LIS Jun 2, 20:30 UTCJun 2, 22:40 UTC2h 10m
2026-06-02 SRR6645 OPO → LIS Jun 2, 18:55 UTCJun 2, 19:35 UTC40m
2026-06-02 SRR6646 CGN → OPO Jun 2, 05:35 UTCJun 2, 06:10 UTC35m
2026-06-02 SRR6646 CGN → OPO Jun 2, 02:10 UTCJun 2, 04:25 UTC2h 15m
2026-06-01 SRR6645 OPO → LIS Jun 1, 21:15 UTCJun 1, 23:25 UTC2h 10m
2026-06-01 SRR6645 OPO → LIS Jun 1, 19:35 UTCJun 1, 20:05 UTC30m
2026-06-01 SRR6646 CGN → OPO Jun 1, 07:05 UTCJun 1, 07:40 UTC35m
2026-06-01 SRR6646 CGN → OPO Jun 1, 01:00 UTCJun 1, 03:20 UTC2h 20m
2026-05-29 SRR6645 OPO → LIS May 29, 20:20 UTCMay 29, 22:25 UTC2h 5m
2026-05-29 SRR6645 OPO → LIS May 29, 18:15 UTCMay 29, 18:45 UTC30m
2026-05-29 SRR6646 CGN → OPO May 29, 05:35 UTCMay 29, 06:15 UTC40m
2026-05-29 SRR6646 CGN → OPO May 29, 02:10 UTCMay 29, 04:20 UTC2h 10m
2026-05-28 SRR6645 OPO → LIS May 28, 20:10 UTCMay 28, 22:20 UTC2h 10m
2026-05-28 SRR6645 OPO → LIS May 28, 18:20 UTCMay 28, 18:50 UTC30m
2026-05-28 SRR6646 CGN → OPO May 28, 05:45 UTCMay 28, 06:20 UTC35m
2026-05-28 SRR6646 CGN → OPO May 28, 02:10 UTCMay 28, 04:25 UTC2h 15m
2026-05-27 SRR6645 OPO → LIS May 27, 20:10 UTCMay 27, 22:25 UTC2h 15m
2026-05-27 SRR6645 OPO → LIS May 27, 18:25 UTCMay 27, 19:00 UTC35m
2026-05-27 SRR6646 CGN → OPO May 27, 05:49 UTCMay 27, 06:25 UTC35m
2026-05-27 SRR6646 CGN → OPO May 27, 02:19 UTCMay 27, 04:30 UTC2h 10m
2026-05-26 SRR6645 OPO → LIS May 26, 20:05 UTCMay 26, 22:20 UTC2h 15m
2026-05-26 SRR6645 OPO → LIS May 26, 18:14 UTCMay 26, 18:50 UTC35m
2026-05-26 SRR6646 CGN → OPO May 26, 05:34 UTCMay 26, 06:14 UTC40m
2026-05-26 SRR6646 CGN → OPO May 26, 02:00 UTCMay 26, 04:10 UTC2h 10m
2026-05-22 SRR6645 OPO → LIS May 22, 20:15 UTCMay 22, 22:30 UTC2h 15m
2026-05-22 SRR6645 OPO → LIS May 22, 18:20 UTCMay 22, 18:50 UTC30m
2026-05-22 SRR6646 CGN → OPO May 22, 05:30 UTCMay 22, 06:05 UTC35m
2026-05-22 SRR6646 CGN → OPO May 22, 02:10 UTCMay 22, 04:30 UTC2h 20m
2026-05-21 SRR6645 OPO → LIS May 21, 20:00 UTCMay 21, 22:25 UTC2h 25m
2026-05-21 SRR6645 OPO → LIS May 21, 18:20 UTCMay 21, 18:45 UTC25m
2026-05-21 SRR6646 CGN → OPO May 21, 05:35 UTCMay 21, 06:15 UTC40m
2026-05-21 SRR6646 CGN → OPO May 21, 02:05 UTCMay 21, 04:20 UTC2h 15m
2026-05-20 SRR6381 MRS → CGN May 20, 20:20 UTCMay 20, 21:40 UTC1h 20m
2026-05-20 SRR6382 CGN → BOD May 20, 02:00 UTCMay 20, 03:15 UTC1h 15m
2026-05-19 SRR6381 MRS → CGN May 19, 20:25 UTCMay 19, 21:45 UTC1h 20m
2026-05-19 SRR6382 CGN → BOD May 19, 01:55 UTCMay 19, 03:05 UTC1h 10m
2026-05-18 SRR6381 MRS → CGN May 18, 20:30 UTCMay 18, 21:50 UTC1h 20m
2026-05-17 SRR6382 CGN → BOD May 17, 23:30 UTCMay 18, 00:45 UTC1h 15m
2026-05-15 SRR6381 MRS → CGN May 15, 20:25 UTCMay 15, 21:40 UTC1h 15m
2026-05-15 SRR6382 CGN → BOD May 15, 01:50 UTCMay 15, 03:15 UTC1h 25m
2026-05-13 SRR6381 MRS → CGN May 13, 20:30 UTCMay 13, 21:40 UTC1h 10m
2026-05-13 SRR6382 CGN → BOD May 13, 02:00 UTCMay 13, 03:20 UTC1h 20m

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

Mode-S 45CE4D frequently asked

What is Mode-S code 45CE4D?
45CE4D is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-SRM.
Where is Mode-S 45CE4D registered?
Mode-S code 45CE4D is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45CE4D broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45CE4D, octal 21347115, decimal 4,574,797.
What flights does 45CE4D operate?
Mode-S 45CE4D has broadcast 17 distinct callsigns, including SRR6646, SRR6645, SRR6382, SRR6381, UPS260.