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sensors Mode-S transponder

3E0173

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-HRTB · AIRBUS HELICOPTERS EC-135/635

Hex
3E0173
Octal
17400563
Decimal
4,063,603
Country
DE
Tail
D-HRTB
Type
EC35
No current signal · last broadcast 1d ago
Flights observed
122
Distinct callsigns
3
Country
DE
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 3E0173.

Country allocation

The ICAO 24-bit address 3E0173 falls within the block assigned to Germany (DE) by ICAO Annex 10, Volume III. Every aircraft registered in Germany 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 3 distinct

Callsign Airline Flights Last seen
CHX36 - 109 2026-07-16
DHRTB - 7 2026-05-11
CHX44 - 6 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 CHX36 - Jul 16, 17:35 UTCJul 16, 17:45 UTC10m
2026-07-16 CHX36 - Jul 16, 16:44 UTCJul 16, 17:00 UTC15m
2026-07-16 CHX36 - Jul 16, 15:14 UTCJul 16, 15:25 UTC10m
2026-07-16 CHX36 - Jul 16, 14:20 UTCJul 16, 14:35 UTC15m
2026-07-16 CHX36 - Jul 16, 12:25 UTCJul 16, 13:05 UTC40m
2026-07-15 CHX36 - Jul 15, 14:55 UTCJul 15, 15:30 UTC35m
2026-07-15 CHX36 - Jul 15, 08:00 UTCJul 15, 08:35 UTC35m
2026-07-14 CHX36 - Jul 14, 08:45 UTCJul 14, 09:50 UTC1h 5m
2026-07-13 CHX36 - Jul 13, 14:35 UTCJul 13, 15:15 UTC40m
2026-07-13 CHX36 - Jul 13, 13:35 UTCJul 13, 13:50 UTC15m
2026-07-12 CHX36 - Jul 12, 14:35 UTCJul 12, 14:50 UTC15m
2026-07-12 CHX36 - Jul 12, 13:45 UTCJul 12, 14:01 UTC15m
2026-07-12 CHX36 - Jul 12, 10:10 UTCJul 12, 10:20 UTC10m
2026-07-12 CHX36 - Jul 12, 09:10 UTCJul 12, 09:20 UTC10m
2026-07-11 CHX36 - Jul 11, 19:20 UTCJul 11, 19:30 UTC10m
2026-07-11 CHX36 - Jul 11, 17:10 UTCJul 11, 17:25 UTC15m
2026-07-11 CHX36 - Jul 11, 11:00 UTCJul 11, 12:00 UTC1h 0m
2026-07-10 CHX36 - Jul 10, 16:10 UTCJul 10, 16:25 UTC15m
2026-07-10 CHX36 - Jul 10, 14:55 UTCJul 10, 15:15 UTC20m
2026-07-09 CHX36 - Jul 9, 17:20 UTCJul 9, 17:35 UTC15m
2026-07-09 CHX36 - Jul 9, 16:30 UTCJul 9, 16:45 UTC15m
2026-07-09 CHX36 - Jul 9, 12:40 UTCJul 9, 13:30 UTC50m
2026-07-08 CHX36 - Jul 8, 18:15 UTCJul 8, 18:25 UTC10m
2026-07-08 CHX36 - Jul 8, 17:10 UTCJul 8, 17:20 UTC10m
2026-07-08 CHX36 - Jul 8, 14:15 UTCJul 8, 15:10 UTC55m
2026-07-07 CHX36 - Jul 7, 15:15 UTCJul 7, 15:45 UTC30m
2026-07-06 CHX36 - Jul 6, 17:05 UTCJul 6, 18:00 UTC55m
2026-07-06 CHX36 - Jul 6, 14:55 UTCJul 6, 16:15 UTC1h 20m
2026-07-04 CHX36 - Jul 4, 16:05 UTCJul 4, 17:00 UTC55m
2026-07-04 CHX36 - Jul 4, 10:00 UTCJul 4, 11:15 UTC1h 15m
2026-07-03 CHX36 - Jul 3, 17:25 UTCJul 3, 17:40 UTC15m
2026-07-03 CHX36 - Jul 3, 16:10 UTCJul 3, 16:25 UTC15m
2026-07-03 CHX36 - Jul 3, 12:20 UTCJul 3, 13:00 UTC40m
2026-07-03 CHX36 - Jul 3, 05:15 UTCJul 3, 05:50 UTC35m
2026-07-02 CHX36 - Jul 2, 15:50 UTCJul 2, 16:35 UTC45m
2026-07-02 CHX36 - Jul 2, 12:25 UTCJul 2, 13:05 UTC40m
2026-07-02 CHX36 - Jul 2, 09:10 UTCJul 2, 09:25 UTC15m
2026-07-01 CHX36 - Jul 1, 16:05 UTCJul 1, 16:15 UTC10m
2026-07-01 CHX36 - Jul 1, 10:55 UTCJul 1, 11:50 UTC55m
2026-07-01 CHX36 - Jul 1, 09:35 UTCJul 1, 10:15 UTC40m
2026-07-01 CHX36 - Jul 1, 07:55 UTCJul 1, 08:40 UTC45m
2026-06-30 CHX36 - Jun 30, 19:20 UTCJun 30, 19:30 UTC10m
2026-06-30 CHX36 - Jun 30, 18:05 UTCJun 30, 18:40 UTC35m
2026-06-30 CHX36 - Jun 30, 14:15 UTCJun 30, 14:25 UTC10m
2026-06-28 CHX36 - Jun 28, 15:14 UTCJun 28, 15:44 UTC30m
2026-06-28 CHX36 - Jun 28, 08:55 UTCJun 28, 09:05 UTC10m
2026-06-27 CHX36 - Jun 27, 19:09 UTCJun 27, 19:34 UTC25m
2026-06-27 CHX36 - Jun 27, 17:59 UTCJun 27, 18:39 UTC40m
2026-06-27 CHX36 - Jun 27, 13:49 UTCJun 27, 14:29 UTC40m
2026-06-27 CHX36 - Jun 27, 07:55 UTCJun 27, 08:10 UTC15m

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 D-HRTB page for operator, model, and routing details .

Mode-S 3E0173 frequently asked

What is Mode-S code 3E0173?
3E0173 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-HRTB.
Where is Mode-S 3E0173 registered?
Mode-S code 3E0173 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3E0173 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3E0173, octal 17400563, decimal 4,063,603.
What flights does 3E0173 operate?
Mode-S 3E0173 has broadcast 3 distinct callsigns, including CHX36, DHRTB, CHX44.