Apparatus

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sensors Mode-S transponder

3C70B8

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-ALEX · AIRBUS A-319

Hex
3C70B8
Octal
17070270
Decimal
3,961,016
Country
DE
Tail
D-ALEX
Type
A319
No current signal · last broadcast 15h ago
Flights observed
118
Distinct callsigns
2
Country
DE
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 3C70B8.

Country allocation

The ICAO 24-bit address 3C70B8 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 2 distinct

Callsign Airline Flights Last seen
KAY53 - 117 2026-07-13
KAY51 - 1 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 KAY53 - Jul 13, 13:45 UTCJul 13, 15:50 UTC2h 5m
2026-07-13 KAY53 - Jul 13, 10:45 UTCJul 13, 12:00 UTC1h 15m
2026-07-12 KAY53 - Jul 12, 04:55 UTCJul 12, 16:10 UTC11h 15m
2026-07-10 KAY53 - Jul 10, 14:35 UTCJul 11, 01:00 UTC10h 25m
2026-07-10 KAY53 - Jul 10, 10:20 UTCJul 10, 13:15 UTC2h 55m
2026-07-09 KAY53 - Jul 9, 13:00 UTCJul 9, 14:10 UTC1h 10m
2026-07-05 KAY53 - Jul 5, 14:35 UTCJul 5, 15:55 UTC1h 20m
2026-07-05 KAY53 - Jul 5, 12:40 UTCJul 5, 12:50 UTC10m
2026-07-05 KAY53 PHL → OLB Jul 5, 04:10 UTCJul 5, 12:30 UTC8h 20m
2026-07-04 KAY53 - Jul 4, 20:15 UTCJul 5, 01:20 UTC5h 5m
2026-07-03 KAY53 - Jul 3, 23:15 UTCJul 4, 05:00 UTC5h 45m
2026-07-03 KAY53 - Jul 3, 12:25 UTCJul 3, 20:55 UTC8h 30m
2026-07-02 KAY53 - Jul 2, 12:20 UTCJul 2, 12:45 UTC25m
2026-07-02 KAY53 JFK → GOA Jul 2, 03:15 UTCJul 2, 10:55 UTC7h 40m
2026-07-01 KAY53 - Jul 1, 11:25 UTCJul 1, 20:15 UTC8h 50m
2026-06-30 KAY53 - Jun 30, 13:20 UTCJun 30, 14:55 UTC1h 35m
2026-06-30 KAY53 - Jun 30, 01:04 UTCJun 30, 11:25 UTC10h 21m
2026-06-28 KAY53 - Jun 28, 15:09 UTCJun 28, 23:50 UTC8h 40m
2026-06-28 KAY53 - Jun 28, 13:45 UTCJun 28, 14:09 UTC25m
2026-06-28 KAY53 - Jun 28, 10:39 UTCJun 28, 12:50 UTC2h 10m
2026-06-27 KAY53 - Jun 27, 12:29 UTCJun 27, 14:09 UTC1h 40m
2026-06-27 KAY53 NCE → LTN Jun 27, 09:15 UTCJun 27, 11:09 UTC1h 55m
2026-06-26 KAY53 - Jun 26, 11:05 UTCJun 26, 12:19 UTC1h 15m
2026-06-24 KAY53 - Jun 24, 23:00 UTCJun 25, 09:34 UTC10h 35m
2026-06-23 KAY53 - Jun 23, 16:29 UTCJun 24, 01:14 UTC8h 45m
2026-06-23 KAY53 NCE → KEF Jun 23, 11:29 UTCJun 23, 15:24 UTC3h 55m
2026-06-22 KAY53 - Jun 22, 09:14 UTCJun 22, 17:44 UTC8h 30m
2026-06-22 KAY53 - Jun 22, 04:19 UTCJun 22, 07:25 UTC3h 5m
2026-06-21 KAY53 BOS → SJC Jun 21, 21:05 UTCJun 22, 03:14 UTC6h 10m
2026-06-21 KAY53 NCE → BOS Jun 21, 10:34 UTCJun 21, 19:09 UTC8h 35m
2026-06-20 KAY53 - Jun 20, 10:49 UTCJun 20, 11:59 UTC1h 10m
2026-06-20 KAY53 PEG → LBG Jun 20, 07:14 UTCJun 20, 08:44 UTC1h 30m
2026-06-20 KAY53 - Jun 20, 04:14 UTCJun 20, 06:14 UTC2h 0m
2026-06-18 KAY53 - Jun 18, 17:40 UTCJun 18, 19:10 UTC1h 30m
2026-06-18 KAY53 NCE → LBG Jun 18, 15:05 UTCJun 18, 16:20 UTC1h 15m
2026-06-18 KAY53 - Jun 18, 12:40 UTCJun 18, 14:01 UTC1h 20m
2026-06-17 KAY53 - Jun 17, 23:15 UTCJun 18, 10:20 UTC11h 5m
2026-06-16 KAY53 SFO → LAX Jun 16, 02:09 UTCJun 16, 03:04 UTC55m
2026-06-15 KAY53 - Jun 15, 15:25 UTCJun 16, 00:55 UTC9h 30m
2026-06-15 KAY53 - Jun 15, 11:39 UTCJun 15, 14:00 UTC2h 20m
2026-06-15 KAY53 - Jun 15, 09:15 UTCJun 15, 09:45 UTC30m
2026-06-14 KAY53 CWL → NCE Jun 14, 09:55 UTCJun 14, 11:45 UTC1h 50m
2026-06-14 KAY53 - Jun 14, 05:50 UTCJun 14, 07:45 UTC1h 55m
2026-06-13 KAY53 BOS → NCE Jun 13, 04:25 UTCJun 13, 11:35 UTC7h 10m
2026-06-12 KAY53 - Jun 12, 22:25 UTCJun 13, 03:10 UTC4h 45m
2026-06-11 KAY53 - Jun 11, 15:55 UTCJun 12, 02:20 UTC10h 25m
2026-06-11 KAY53 - Jun 11, 12:15 UTCJun 11, 14:45 UTC2h 30m
2026-06-10 KAY53 MUC → NCE Jun 10, 17:05 UTCJun 10, 18:15 UTC1h 10m
2026-06-04 KAY53 - Jun 4, 17:30 UTCJun 4, 18:35 UTC1h 5m
2026-06-04 KAY53 - Jun 4, 14:15 UTCJun 4, 16:35 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 D-ALEX page for operator, model, and routing details .

Mode-S 3C70B8 frequently asked

What is Mode-S code 3C70B8?
3C70B8 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-ALEX.
Where is Mode-S 3C70B8 registered?
Mode-S code 3C70B8 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C70B8 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C70B8, octal 17070270, decimal 3,961,016.
What flights does 3C70B8 operate?
Mode-S 3C70B8 has broadcast 2 distinct callsigns, including KAY53, KAY51.