Apparatus

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sensors Mode-S transponder

46D1CF

ICAO 24-bit transponder address · allocated to Greece

Currently assigned to SX-TNO · ATR-72-600

Hex
46D1CF
Octal
21550717
Decimal
4,641,231
Country
GR
Tail
SX-TNO
Type
AT76
No current signal · last broadcast 5h ago
Flights observed
414
Distinct callsigns
20
Country
GR
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 46D1CF.

Country allocation

The ICAO 24-bit address 46D1CF falls within the block assigned to Greece (GR) by ICAO Annex 10, Volume III. Every aircraft registered in Greece 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
SEH311 Sky Express 10 2026-05-26
SEH1SM Sky Express 10 2026-05-26
SEH9TR - 9 2026-05-21
SEH6MT - 9 2026-05-29
SEH5AM Sky Express 9 2026-05-29
SEH9JT - 8 2026-05-21
SEH6HS Sky Express 7 2026-05-24
SEH691 Sky Express 7 2026-05-09
SEH4AK Sky Express 7 2026-05-25
SEH6SF Sky Express 6 2026-05-24
SEH6KU Sky Express 6 2026-05-26
SEH6CA Sky Express 6 2026-05-18
SEH690 Sky Express 6 2026-05-09
SEH5LA Sky Express 6 2026-05-29
SEH5KA Sky Express 6 2026-05-25
SEH5CF Sky Express 6 2026-05-18
SEH511 Sky Express 6 2026-05-26
SEH510 Sky Express 6 2026-05-26
SEH4VS Sky Express 6 2026-05-27
SEH4EL Sky Express 6 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SEH6MT - May 29, 19:55 UTCMay 29, 20:25 UTC30m
2026-05-29 SEH5AM ATH → JMK May 29, 18:50 UTCMay 29, 19:15 UTC25m
2026-05-29 SEH405 JNX → ATH May 29, 16:35 UTCMay 29, 17:55 UTC1h 20m
2026-05-29 SEH475 PAS → ATH May 29, 15:10 UTCMay 29, 15:35 UTC25m
2026-05-29 SEH474 ATH → PAS May 29, 14:10 UTCMay 29, 14:35 UTC25m
2026-05-29 SEH5LA EFL → ATH May 29, 12:10 UTCMay 29, 13:00 UTC50m
2026-05-29 SEH4EL ATH → EFL May 29, 10:35 UTCMay 29, 11:30 UTC55m
2026-05-29 SEH5SK JSI → ATH May 29, 09:10 UTCMay 29, 09:40 UTC30m
2026-05-29 SEH4SK ATH → JSI May 29, 08:00 UTCMay 29, 08:25 UTC25m
2026-05-29 SEH2MT SMI → JMK May 29, 06:15 UTCMay 29, 06:40 UTC25m
2026-05-29 SEH1AM ATH → JMK May 29, 04:50 UTCMay 29, 05:15 UTC25m
2026-05-28 SEH6MT JMK → ATH May 28, 19:25 UTCMay 28, 19:50 UTC25m
2026-05-28 SEH5AM ATH → JMK May 28, 18:10 UTCMay 28, 18:40 UTC30m
2026-05-28 SEH6CQ CHQ → ATH May 28, 16:20 UTCMay 28, 17:05 UTC45m
2026-05-28 SEH5DQ ATH → CHQ May 28, 14:45 UTCMay 28, 15:30 UTC45m
2026-05-28 SEH6TR JTR → ATH May 28, 13:00 UTCMay 28, 13:35 UTC35m
2026-05-28 SEH6JT ATH → JTR May 28, 11:40 UTCMay 28, 12:05 UTC25m
2026-05-28 SEH2GK SKG → ATH May 28, 09:45 UTCMay 28, 10:35 UTC50m
2026-05-28 SEH2HG ATH → SKG May 28, 08:10 UTCMay 28, 09:00 UTC50m
2026-05-28 SEH2CA CFU → ATH May 28, 06:15 UTCMay 28, 06:50 UTC35m
2026-05-28 SEH1CF ATH → CFU May 28, 03:55 UTCMay 28, 04:25 UTC30m
2026-05-27 SEH6MT - May 27, 19:35 UTCMay 27, 20:05 UTC30m
2026-05-27 SEH5AM ATH → JMK May 27, 18:15 UTCMay 27, 18:40 UTC25m
2026-05-27 SEH4VS MJT → ATH May 27, 16:10 UTCMay 27, 16:55 UTC45m
2026-05-27 SEH5KM SKG → MJT May 27, 14:30 UTCMay 27, 15:25 UTC55m
2026-05-27 SEH5JG MJT → SKG May 27, 12:55 UTCMay 27, 13:50 UTC55m
2026-05-27 SEH3LE ATH → MJT May 27, 11:35 UTCMay 27, 12:15 UTC40m
2026-05-27 SEH2GK SKG → ATH May 27, 09:45 UTCMay 27, 10:35 UTC50m
2026-05-27 SEH2HG ATH → SKG May 27, 08:05 UTCMay 27, 08:55 UTC50m
2026-05-27 SEH2CA CFU → ATH May 27, 05:45 UTCMay 27, 06:34 UTC50m
2026-05-27 SEH1CF ATH → CFU May 27, 03:54 UTCMay 27, 04:39 UTC45m
2026-05-26 SEH311 SMI → ATH May 26, 16:00 UTCMay 26, 16:45 UTC45m
2026-05-26 SEH510 SKG → SMI May 26, 14:00 UTCMay 26, 15:00 UTC1h 0m
2026-05-26 SEH6UG SKU → SKU May 26, 12:35 UTCMay 26, 13:04 UTC30m
2026-05-26 SEH6KU SKG → SKU May 26, 11:30 UTCMay 26, 12:05 UTC35m
2026-05-26 SEH511 SMI → SKG May 26, 09:59 UTCMay 26, 11:00 UTC1h 0m
2026-05-26 SEH1SM ATH → SMI May 26, 08:30 UTCMay 26, 09:04 UTC35m
2026-05-25 SEH6JA JKH → ATH May 25, 19:30 UTCMay 25, 19:59 UTC30m
2026-05-25 SEH5TK ATH → JKH May 25, 18:05 UTCMay 25, 18:30 UTC25m
2026-05-25 SEH405 JNX → ATH May 25, 16:30 UTCMay 25, 17:00 UTC30m
2026-05-25 SEH404 ATH → JNX May 25, 15:20 UTCMay 25, 15:50 UTC30m
2026-05-25 SEH5KA KGS → ATH May 25, 13:40 UTCMay 25, 14:30 UTC50m
2026-05-25 SEH4AK ATH → KGS May 25, 12:15 UTCMay 25, 13:35 UTC1h 20m
2026-05-25 SEH2GK SKG → ATH May 25, 10:05 UTCMay 25, 11:00 UTC55m
2026-05-25 SEH2HG ATH → SKG May 25, 08:30 UTCMay 25, 09:20 UTC50m
2026-05-25 SEH2DT AXD → ATH May 25, 05:55 UTCMay 25, 06:50 UTC55m
2026-05-25 SEH1XD ATH → AXD May 25, 03:55 UTCMay 25, 04:50 UTC55m
2026-05-24 SEH6HS SOF → ATH May 24, 18:25 UTCMay 24, 19:40 UTC1h 15m
2026-05-24 SEH6SF ATH → SOF May 24, 16:10 UTCMay 24, 17:25 UTC1h 15m
2026-05-24 SEH475 PAS → ATH May 24, 14:25 UTCMay 24, 14:55 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 SX-TNO page for operator, model, and routing details .

Mode-S 46D1CF frequently asked

What is Mode-S code 46D1CF?
46D1CF is an ICAO 24-bit transponder address. Allocated to Greece. Assigned to SX-TNO.
Where is Mode-S 46D1CF registered?
Mode-S code 46D1CF is allocated to Greece (GR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 46D1CF broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 46D1CF, octal 21550717, decimal 4,641,231.
What flights does 46D1CF operate?
Mode-S 46D1CF has broadcast 20 distinct callsigns, including SEH311, SEH1SM, SEH9TR, SEH6MT, SEH5AM.