Apparatus

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sensors Mode-S transponder

3C64B1

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIEQ · AIRBUS A-321neo

Hex
3C64B1
Octal
17062261
Decimal
3,957,937
Country
DE
Tail
D-AIEQ
Type
A21N
Broadcasting now · callsign DLH691 · 36,000 ft
Flights observed
375
Distinct callsigns
20
Country
DE
Last broadcast
2h ago

Current position

3C64B1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C64B1 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 20 distinct

Callsign Airline Flights Last seen
DLH39X - 10 2026-06-29
DLH35M - 10 2026-06-29
DLH585 - 9 2026-07-09
DLH1FL - 9 2026-07-11
DLH62A Lufthansa 8 2026-06-10
DLH79E Lufthansa 7 2026-06-10
DLH6VA - 7 2026-07-11
DLH584 - 7 2026-07-08
DLH583 - 7 2026-07-08
DLH582 - 7 2026-07-08
DLH82V - 6 2026-07-02
DLH57Y - 6 2026-06-24
DLH43U - 6 2026-07-02
DLH35U - 6 2026-07-07
DLH17F - 6 2026-06-24
DLH02T - 6 2026-07-07
DLH4UA - 5 2026-07-12
DLH05H - 5 2026-07-03
DLH92J - 4 2026-06-26
DLH6TV - 4 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DLH690 FRA → TLV Jul 14, 16:40 UTCJul 14, 20:10 UTC3h 30m
2026-07-14 DLH3RK MLA → FRA Jul 14, 11:05 UTCJul 14, 13:30 UTC2h 25m
2026-07-14 DLH4WE FRA → MLA Jul 14, 07:50 UTCJul 14, 09:55 UTC2h 5m
2026-07-14 DLH8AE - Jul 14, 04:30 UTCJul 14, 06:10 UTC1h 40m
2026-07-13 DLH7LV - Jul 13, 19:00 UTCJul 13, 20:10 UTC1h 10m
2026-07-13 DLH8XA - Jul 13, 09:45 UTCJul 13, 10:20 UTC35m
2026-07-13 DLH9MT FRA → HAJ Jul 13, 08:20 UTCJul 13, 08:50 UTC30m
2026-07-13 DLH4T3 KEF → FRA Jul 13, 02:15 UTCJul 13, 05:15 UTC3h 0m
2026-07-12 DLH4UA FRA → KEF Jul 12, 20:55 UTCJul 13, 00:05 UTC3h 10m
2026-07-12 DLH39E SKG → FRA Jul 12, 16:40 UTCJul 12, 18:55 UTC2h 15m
2026-07-12 DLH02M FRA → SKG Jul 12, 13:30 UTCJul 12, 15:25 UTC1h 55m
2026-07-12 DLH2EL - Jul 12, 09:15 UTCJul 12, 11:20 UTC2h 5m
2026-07-12 DLH9VV - Jul 12, 06:20 UTCJul 12, 08:10 UTC1h 50m
2026-07-11 DLH1FL - Jul 11, 14:15 UTCJul 11, 17:05 UTC2h 50m
2026-07-11 DLH6VA FRA → KEF Jul 11, 09:35 UTCJul 11, 12:50 UTC3h 15m
2026-07-11 DLH847 - Jul 11, 00:45 UTCJul 11, 03:45 UTC3h 0m
2026-07-10 DLH4UA - Jul 10, 20:55 UTCJul 10, 23:30 UTC2h 35m
2026-07-10 DLH4UA - Jul 10, 20:10 UTCJul 10, 20:50 UTC40m
2026-07-10 DLH5RM DUB → FRA Jul 10, 17:05 UTCJul 10, 18:35 UTC1h 30m
2026-07-10 DLH980 FRA → DUB Jul 10, 14:05 UTCJul 10, 15:50 UTC1h 45m
2026-07-10 DLH6VR ATH → FRA Jul 10, 09:00 UTCJul 10, 11:50 UTC2h 50m
2026-07-10 DLH9MN FRA → ATH Jul 10, 05:25 UTCJul 10, 07:40 UTC2h 15m
2026-07-09 DLH687 TLV → FRA Jul 9, 14:20 UTCJul 9, 18:35 UTC4h 15m
2026-07-09 DLH686 FRA → TLV Jul 9, 09:10 UTCJul 9, 12:40 UTC3h 30m
2026-07-09 DLH585 - Jul 9, 02:05 UTCJul 9, 06:05 UTC4h 0m
2026-07-08 DLH584 - Jul 8, 20:45 UTCJul 9, 00:10 UTC3h 25m
2026-07-08 DLH583 - Jul 8, 13:55 UTCJul 8, 17:50 UTC3h 55m
2026-07-08 DLH582 - Jul 8, 08:50 UTCJul 8, 12:00 UTC3h 10m
2026-07-08 DLH585 - Jul 8, 02:05 UTCJul 8, 05:50 UTC3h 45m
2026-07-07 DLH584 - Jul 7, 20:25 UTCJul 7, 23:45 UTC3h 20m
2026-07-07 DLH35U FAO → FRA Jul 7, 15:20 UTCJul 7, 18:10 UTC2h 50m
2026-07-07 DLH02T FRA → FAO Jul 7, 11:00 UTCJul 7, 13:40 UTC2h 40m
2026-07-07 DLH99Y LIS → FRA Jul 7, 06:10 UTCJul 7, 08:50 UTC2h 40m
2026-07-06 DLH23C FRA → LIS Jul 6, 19:55 UTCJul 6, 22:35 UTC2h 40m
2026-07-06 DLH99M ALC → FRA Jul 6, 15:55 UTCJul 6, 18:10 UTC2h 15m
2026-07-06 DLH93V FRA → ALC Jul 6, 12:15 UTCJul 6, 14:20 UTC2h 5m
2026-07-06 DLH9KK - Jul 6, 10:05 UTCJul 6, 10:50 UTC45m
2026-07-06 DLH3WU - Jul 6, 08:15 UTCJul 6, 09:00 UTC45m
2026-07-06 DLH1331 - Jul 6, 00:30 UTCJul 6, 03:35 UTC3h 5m
2026-07-05 DLH1330 FRA → CMN Jul 5, 20:10 UTCJul 5, 23:05 UTC2h 55m
2026-07-05 DLH687 TLV → FRA Jul 5, 14:15 UTCJul 5, 18:15 UTC4h 0m
2026-07-05 DLH686 FRA → TLV Jul 5, 08:40 UTCJul 5, 12:15 UTC3h 35m
2026-07-05 DLH893 - Jul 5, 04:00 UTCJul 5, 05:50 UTC1h 50m
2026-07-04 DLH892 - Jul 4, 18:20 UTCJul 4, 20:10 UTC1h 50m
2026-07-04 DLH95H FAO → FRA Jul 4, 12:35 UTCJul 4, 15:10 UTC2h 35m
2026-07-04 DLH37E FRA → FAO Jul 4, 08:45 UTCJul 4, 11:20 UTC2h 35m
2026-07-04 DLH04C - Jul 4, 04:50 UTCJul 4, 06:40 UTC1h 50m
2026-07-03 DLH05H FRA → BCN Jul 3, 19:45 UTCJul 3, 21:20 UTC1h 35m
2026-07-03 DLH2PV - Jul 3, 17:25 UTCJul 3, 18:10 UTC45m
2026-07-03 DLH4XK FRA → HAM Jul 3, 15:35 UTCJul 3, 16:15 UTC40m

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-AIEQ page for operator, model, and routing details .

Mode-S 3C64B1 frequently asked

What is Mode-S code 3C64B1?
3C64B1 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIEQ.
Where is Mode-S 3C64B1 registered?
Mode-S code 3C64B1 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C64B1 broadcasting right now?
Yes. Mode-S 3C64B1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C64B1, octal 17062261, decimal 3,957,937.
What flights does 3C64B1 operate?
Mode-S 3C64B1 has broadcast 20 distinct callsigns, including DLH39X, DLH35M, DLH585, DLH1FL, DLH62A.