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sensors Mode-S transponder

491118

ICAO 24-bit transponder address · allocated to Portugal

Currently assigned to CS-DHX · LEARJET 40

Hex
491118
Octal
22210430
Decimal
4,788,504
Country
PT
Tail
CS-DHX
Type
LJ40
No current signal · last broadcast 5h ago
Flights observed
85
Distinct callsigns
1
Country
PT
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 491118.

Country allocation

The ICAO 24-bit address 491118 falls within the block assigned to Portugal (PT) by ICAO Annex 10, Volume III. Every aircraft registered in Portugal 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 1 distinct

Callsign Airline Flights Last seen
CSDHX - 85 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-04 CSDHX - Jul 4, 16:00 UTCJul 4, 17:15 UTC1h 15m
2026-07-04 CSDHX - Jul 4, 12:30 UTCJul 4, 15:00 UTC2h 30m
2026-07-03 CSDHX BCN → MLA Jul 3, 15:10 UTCJul 3, 16:55 UTC1h 45m
2026-07-03 CSDHX - Jul 3, 10:50 UTCJul 3, 11:40 UTC50m
2026-07-02 CSDHX - Jul 2, 12:20 UTCJul 2, 13:10 UTC50m
2026-07-02 CSDHX - Jul 2, 10:05 UTCJul 2, 11:20 UTC1h 15m
2026-07-02 CSDHX BCN → IBZ Jul 2, 08:15 UTCJul 2, 09:00 UTC45m
2026-07-02 CSDHX - Jul 2, 06:41 UTCJul 2, 07:05 UTC24m
2026-06-30 CSDHX - Jun 30, 12:15 UTCJun 30, 12:55 UTC40m
2026-06-30 CSDHX BCN → CEQ Jun 30, 10:35 UTCJun 30, 11:30 UTC55m
2026-06-27 CSDHX MAD → BCN Jun 27, 21:15 UTCJun 27, 21:59 UTC45m
2026-06-27 CSDHX IBZ → MAD Jun 27, 19:09 UTCJun 27, 19:55 UTC45m
2026-06-27 CSDHX BCN → IBZ Jun 27, 17:49 UTCJun 27, 18:24 UTC35m
2026-06-26 CSDHX - Jun 26, 14:59 UTCJun 26, 15:29 UTC30m
2026-06-26 CSDHX - Jun 26, 11:20 UTCJun 26, 11:45 UTC25m
2026-06-25 CSDHX - Jun 25, 15:10 UTCJun 25, 16:14 UTC1h 5m
2026-06-25 CSDHX BCN → GVA Jun 25, 12:19 UTCJun 25, 13:35 UTC1h 15m
2026-06-24 CSDHX - Jun 24, 10:35 UTCJun 24, 11:20 UTC45m
2026-06-24 CSDHX BCN → ALC Jun 24, 08:39 UTCJun 24, 09:24 UTC45m
2026-06-23 CSDHX - Jun 23, 11:10 UTCJun 23, 11:40 UTC30m
2026-06-23 CSDHX - Jun 23, 08:50 UTCJun 23, 09:20 UTC30m
2026-06-22 CSDHX - Jun 22, 17:44 UTCJun 22, 18:44 UTC1h 0m
2026-06-22 CSDHX BCN → GVA Jun 22, 15:14 UTCJun 22, 16:20 UTC1h 5m
2026-06-22 CSDHX IBZ → BCN Jun 22, 11:24 UTCJun 22, 12:05 UTC40m
2026-06-22 CSDHX BCN → IBZ Jun 22, 08:25 UTCJun 22, 09:04 UTC40m
2026-06-21 CSDHX - Jun 21, 10:29 UTCJun 21, 11:40 UTC1h 10m
2026-06-21 CSDHX - Jun 21, 05:35 UTCJun 21, 08:10 UTC2h 35m
2026-06-20 CSDHX - Jun 20, 20:34 UTCJun 20, 22:05 UTC1h 30m
2026-06-20 CSDHX - Jun 20, 16:34 UTCJun 20, 17:59 UTC1h 25m
2026-06-20 CSDHX - Jun 20, 14:54 UTCJun 20, 15:09 UTC15m
2026-06-19 CSDHX - Jun 19, 14:54 UTCJun 19, 15:49 UTC55m
2026-06-19 CSDHX BCN → GVA Jun 19, 12:14 UTCJun 19, 13:29 UTC1h 15m
2026-06-18 CSDHX - Jun 18, 17:25 UTCJun 18, 18:30 UTC1h 5m
2026-06-18 CSDHX - Jun 18, 15:00 UTCJun 18, 16:15 UTC1h 15m
2026-06-18 CSDHX MAD → BCN Jun 18, 12:55 UTCJun 18, 13:45 UTC50m
2026-06-17 CSDHX BCN → MAD Jun 17, 17:00 UTCJun 17, 17:55 UTC55m
2026-06-14 CSDHX - Jun 14, 11:50 UTCJun 14, 13:05 UTC1h 15m
2026-06-12 CSDHX BCN → LME Jun 12, 08:55 UTCJun 12, 10:10 UTC1h 15m
2026-06-11 CSDHX - Jun 11, 10:10 UTCJun 11, 11:50 UTC1h 40m
2026-06-11 CSDHX IBZ → BQH Jun 11, 06:10 UTCJun 11, 08:30 UTC2h 20m
2026-06-11 CSDHX BCN → IBZ Jun 11, 04:15 UTCJun 11, 04:45 UTC30m
2026-06-10 CSDHX - Jun 10, 14:05 UTCJun 10, 14:35 UTC30m
2026-06-10 CSDHX - Jun 10, 12:00 UTCJun 10, 13:05 UTC1h 5m
2026-06-09 CSDHX IBZ → MAD Jun 9, 12:40 UTCJun 9, 13:30 UTC50m
2026-06-09 CSDHX - Jun 9, 11:15 UTCJun 9, 11:50 UTC35m
2026-06-09 CSDHX - Jun 9, 10:10 UTCJun 9, 10:20 UTC10m
2026-06-09 CSDHX - Jun 9, 08:15 UTCJun 9, 08:50 UTC35m
2026-06-07 CSDHX IBZ → BCN Jun 7, 16:50 UTCJun 7, 17:25 UTC35m
2026-06-07 CSDHX BCN → IBZ Jun 7, 15:00 UTCJun 7, 15:35 UTC35m
2026-06-05 CSDHX IBZ → BCN Jun 5, 11:50 UTCJun 5, 12:25 UTC35m

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 CS-DHX page for operator, model, and routing details .

Mode-S 491118 frequently asked

What is Mode-S code 491118?
491118 is an ICAO 24-bit transponder address. Allocated to Portugal. Assigned to CS-DHX.
Where is Mode-S 491118 registered?
Mode-S code 491118 is allocated to Portugal (PT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 491118 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 491118, octal 22210430, decimal 4,788,504.
What flights does 491118 operate?
Mode-S 491118 has broadcast 1 distinct callsign, including CSDHX.