Apparatus

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sensors Mode-S transponder

45AB27

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-JYG · BOEING 737-800

Hex
45AB27
Octal
21325447
Decimal
4,565,799
Country
DK
Tail
OY-JYG
Type
B738
No current signal · last broadcast 12h ago
Flights observed
259
Distinct callsigns
20
Country
DK
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 45AB27.

Country allocation

The ICAO 24-bit address 45AB27 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 20 distinct

Callsign Airline Flights Last seen
GRL774 - 11 2026-06-26
FIN8U Finnair 10 2026-07-06
FIN8AM - 10 2026-07-08
FIN33V - 10 2026-07-03
FIN1HA - 9 2026-07-06
JTD760 - 7 2026-04-14
JTD759 - 5 2026-04-21
FIN1YB - 4 2026-07-07
FIN1TH - 4 2026-07-07
JTD9759 - 3 2026-04-13
JTD9045 Jet Time 3 2026-05-16
FIN9ML - 3 2026-06-29
FIN8KT - 3 2026-07-02
FIN7X - 3 2026-07-02
FIN6PR - 3 2026-06-28
FIN50J Finnair 3 2026-07-07
FIN1AB - 3 2026-06-29
SAS2736 Scandinavian Airlines System 2 2026-05-04
SAS2733 Scandinavian Airlines System 2 2026-05-04
SAS1694 Scandinavian Airlines System 2 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SAS698 PSA → CPH Jul 13, 18:55 UTCJul 13, 20:40 UTC1h 45m
2026-07-13 SAS697 CPH → PSA Jul 13, 15:35 UTCJul 13, 17:35 UTC2h 0m
2026-07-13 SAS2834 DBV → CPH Jul 13, 09:45 UTCJul 13, 11:50 UTC2h 5m
2026-07-13 SAS2833 CPH → DBV Jul 13, 06:45 UTCJul 13, 08:45 UTC2h 0m
2026-07-12 JTD34Q CHQ → CPH Jul 12, 19:30 UTCJul 12, 22:40 UTC3h 10m
2026-07-12 JTD303 - Jul 12, 15:20 UTCJul 12, 18:25 UTC3h 5m
2026-07-12 JTD268 - Jul 12, 09:50 UTCJul 12, 12:55 UTC3h 5m
2026-07-12 JTD267 - Jul 12, 05:30 UTCJul 12, 08:15 UTC2h 45m
2026-07-08 JTD9001 - Jul 8, 10:35 UTCJul 8, 11:55 UTC1h 20m
2026-07-08 FIN8AM HEL → HEL Jul 8, 04:30 UTCJul 8, 07:30 UTC3h 0m
2026-07-07 FIN50J MXP → HEL Jul 7, 18:00 UTCJul 7, 20:40 UTC2h 40m
2026-07-07 FIN50J MXP → HEL Jul 7, 17:45 UTCJul 7, 17:50 UTC5m
2026-07-07 FIN45M HEL → MXP Jul 7, 14:00 UTCJul 7, 16:35 UTC2h 35m
2026-07-07 FIN1YB PRG → HEL Jul 7, 09:55 UTCJul 7, 11:40 UTC1h 45m
2026-07-07 FIN1TH HEL → PRG Jul 7, 06:50 UTCJul 7, 08:45 UTC1h 55m
2026-07-06 FIN8U BUD → HEL Jul 6, 16:35 UTCJul 6, 18:40 UTC2h 5m
2026-07-06 FIN1HA HEL → BUD Jul 6, 13:30 UTCJul 6, 15:30 UTC2h 0m
2026-07-06 FIN1YB PRG → HEL Jul 6, 09:50 UTCJul 6, 11:40 UTC1h 50m
2026-07-06 FIN1TH HEL → PRG Jul 6, 06:50 UTCJul 6, 08:50 UTC2h 0m
2026-07-05 FIN6HL BUD → HEL Jul 5, 11:05 UTCJul 5, 13:10 UTC2h 5m
2026-07-05 FIN5DM HEL → BUD Jul 5, 07:10 UTCJul 5, 09:10 UTC2h 0m
2026-07-04 FIN8U BUD → HEL Jul 4, 17:00 UTCJul 4, 19:05 UTC2h 5m
2026-07-04 FIN1HA HEL → BUD Jul 4, 14:05 UTCJul 4, 16:05 UTC2h 0m
2026-07-04 FIN1YB PRG → HEL Jul 4, 09:50 UTCJul 4, 11:45 UTC1h 55m
2026-07-04 FIN1TH HEL → PRG Jul 4, 06:50 UTCJul 4, 08:40 UTC1h 50m
2026-07-03 FIN8U BUD → HEL Jul 3, 17:45 UTCJul 3, 19:45 UTC2h 0m
2026-07-03 FIN1HA HEL → BUD Jul 3, 14:40 UTCJul 3, 16:45 UTC2h 5m
2026-07-03 FIN33V KEF → HEL Jul 3, 10:05 UTCJul 3, 13:05 UTC3h 0m
2026-07-03 FIN8AM HEL → KEF Jul 3, 04:35 UTCJul 3, 07:45 UTC3h 10m
2026-07-02 FIN7X NCE → HEL Jul 2, 18:20 UTCJul 2, 21:05 UTC2h 45m
2026-07-02 FIN8KT HEL → NCE Jul 2, 14:00 UTCJul 2, 17:05 UTC3h 5m
2026-07-02 FIN33V KEF → HEL Jul 2, 09:30 UTCJul 2, 12:40 UTC3h 10m
2026-07-02 FIN8AM HEL → KEF Jul 2, 04:45 UTCJul 2, 08:00 UTC3h 15m
2026-07-01 FIN8U BUD → HEL Jul 1, 16:40 UTCJul 1, 18:35 UTC1h 55m
2026-07-01 FIN1HA HEL → BUD Jul 1, 13:35 UTCJul 1, 15:45 UTC2h 10m
2026-07-01 FIN33V - Jul 1, 09:00 UTCJul 1, 12:00 UTC3h 0m
2026-07-01 FIN8AM HEL → KEF Jul 1, 04:30 UTCJul 1, 07:50 UTC3h 20m
2026-06-30 FIN4KG - Jun 30, 18:00 UTCJun 30, 20:20 UTC2h 20m
2026-06-30 FIN9AP HEL → VCE Jun 30, 14:00 UTCJun 30, 16:40 UTC2h 40m
2026-06-30 FIN33V KEF → HEL Jun 30, 09:00 UTCJun 30, 12:00 UTC3h 0m
2026-06-30 FIN8AM HEL → KEF Jun 30, 04:25 UTCJun 30, 07:40 UTC3h 15m
2026-06-29 FIN7LK - Jun 29, 17:59 UTCJun 29, 20:40 UTC2h 40m
2026-06-29 FIN60A - Jun 29, 13:59 UTCJun 29, 16:44 UTC2h 45m
2026-06-29 FIN9ML FRA → HEL Jun 29, 10:40 UTCJun 29, 12:34 UTC1h 55m
2026-06-29 FIN1AB HEL → FRA Jun 29, 06:59 UTCJun 29, 09:10 UTC2h 10m
2026-06-28 FIN6PR - Jun 28, 18:59 UTCJun 28, 20:14 UTC1h 15m
2026-06-28 JTD9998 HEL → CPH Jun 28, 16:00 UTCJun 28, 17:19 UTC1h 20m
2026-06-28 JTD998 RHO → HEL Jun 28, 11:04 UTCJun 28, 14:50 UTC3h 45m
2026-06-28 JTD203 CPH → RHO Jun 28, 06:40 UTCJun 28, 09:55 UTC3h 15m
2026-06-27 SAS51B BCN → CPH Jun 27, 17:55 UTCJun 27, 20:14 UTC2h 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-JYG page for operator, model, and routing details .

Mode-S 45AB27 frequently asked

What is Mode-S code 45AB27?
45AB27 is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-JYG.
Where is Mode-S 45AB27 registered?
Mode-S code 45AB27 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 45AB27 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 45AB27, octal 21325447, decimal 4,565,799.
What flights does 45AB27 operate?
Mode-S 45AB27 has broadcast 20 distinct callsigns, including GRL774, FIN8U, FIN8AM, FIN33V, FIN1HA.