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sensors Mode-S transponder

3C5B31

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AFYQ · AIRBUS A-330-300

Hex
3C5B31
Octal
17055461
Decimal
3,955,505
Country
DE
Tail
D-AFYQ
Type
A333
No current signal · last broadcast Jul 26, 21:35 UTC
Flights observed
188
Distinct callsigns
20
Country
DE
Last broadcast
Jul 26, 21:35 UTC

Last known position

Most recent position reported by Mode-S 3C5B31.

Country allocation

The ICAO 24-bit address 3C5B31 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
OCN68 O Air 22 2026-07-22
OCN69 O Air 19 2026-07-23
OCN659 O Air 19 2026-07-21
OCN642 O Air 19 2026-07-21
OCN133 O Air 13 2026-07-24
OCN617 - 11 2026-07-25
OCN601 - 11 2026-07-25
OCN132W O Air 10 2026-07-23
OCN539 - 9 2026-07-17
OCN52 - 9 2026-07-17
OCN74 - 7 2026-07-05
OCN51 - 7 2026-06-24
OCN50 O Air 7 2026-06-24
OCN75 - 6 2026-07-05
OCN77 - 3 2026-06-23
OCN76 - 3 2026-06-23
OCN12 - 3 2026-06-20
OCN3 O Air 2 2026-06-11
OCN157 - 2 2026-07-08
OCN156 - 2 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 OCN21K LPA → FRA Jul 26, 11:10 UTCJul 26, 21:25 UTC10h 15m
2026-07-25 OCN617 RSW → FRA Jul 25, 23:30 UTCJul 26, 08:25 UTC8h 56m
2026-07-25 OCN601 FRA → RSW Jul 25, 11:40 UTCJul 25, 21:10 UTC9h 30m
2026-07-24 OCN133 WDH → FRA Jul 24, 18:55 UTCJul 25, 03:10 UTC8h 15m
2026-07-24 OCN133 WDH → FRA Jul 24, 02:20 UTCJul 25, 02:15 UTC23h 55m
2026-07-23 OCN133 WDH → FRA Jul 23, 22:25 UTCJul 24, 21:05 UTC22h 40m
2026-07-23 OCN132W FRA → WDH Jul 23, 20:25 UTCJul 24, 19:50 UTC23h 25m
2026-07-23 OCN69 MCO → FRA Jul 23, 00:15 UTCJul 23, 09:05 UTC8h 50m
2026-07-22 OCN68 FRA → MCO Jul 22, 12:15 UTCJul 22, 21:20 UTC9h 5m
2026-07-21 OCN659 TPA → FRA Jul 21, 22:05 UTCJul 22, 05:25 UTC7h 20m
2026-07-21 OCN642 FRA → TPA Jul 21, 09:55 UTCJul 21, 19:10 UTC9h 15m
2026-07-20 OCN659 TPA → FRA Jul 20, 22:15 UTCJul 21, 07:00 UTC8h 44m
2026-07-20 OCN642 FRA → TPA Jul 20, 10:15 UTCJul 20, 19:30 UTC9h 15m
2026-07-18 OCN617 RSW → FRA Jul 18, 23:25 UTCJul 19, 08:35 UTC9h 10m
2026-07-18 OCN601 - Jul 18, 11:25 UTCJul 18, 21:05 UTC9h 40m
2026-07-17 OCN539 - Jul 17, 21:00 UTCJul 18, 05:10 UTC8h 11m
2026-07-17 OCN52 FRA → MSP Jul 17, 10:00 UTCJul 17, 18:44 UTC8h 45m
2026-07-14 OCN156 - Jul 14, 20:30 UTCJul 14, 23:10 UTC2h 39m
2026-07-14 OCN659 - Jul 14, 01:30 UTCJul 14, 07:05 UTC5h 35m
2026-07-13 OCN659 - Jul 13, 22:10 UTCJul 14, 01:25 UTC3h 15m
2026-07-13 OCN642 FRA → TPA Jul 13, 10:00 UTCJul 13, 19:50 UTC9h 50m
2026-07-12 OCN133 - Jul 12, 01:10 UTCJul 12, 03:10 UTC2h 0m
2026-07-10 OCN132W - Jul 10, 20:25 UTCJul 10, 22:35 UTC2h 10m
2026-07-09 OCN659 - Jul 9, 22:15 UTCJul 10, 07:00 UTC8h 45m
2026-07-09 OCN642 - Jul 9, 19:00 UTCJul 9, 20:00 UTC1h 0m
2026-07-09 OCN642 - Jul 9, 10:05 UTCJul 9, 16:20 UTC6h 15m
2026-07-08 OCN157 - Jul 8, 23:35 UTCJul 9, 03:05 UTC3h 30m
2026-07-08 OCN157 - Jul 8, 22:40 UTCJul 8, 23:30 UTC50m
2026-07-07 OCN156 - Jul 7, 20:10 UTCJul 7, 23:15 UTC3h 5m
2026-07-06 OCN659 TPA → FRA Jul 6, 22:25 UTCJul 7, 07:15 UTC8h 50m
2026-07-06 OCN642 FRA → TPA Jul 6, 10:05 UTCJul 6, 19:45 UTC9h 40m
2026-07-05 OCN75 - Jul 5, 23:10 UTCJul 6, 04:50 UTC5h 40m
2026-07-05 OCN74 - Jul 5, 14:20 UTCJul 5, 21:15 UTC6h 55m
2026-07-04 OCN617 RSW → FRA Jul 4, 23:40 UTCJul 5, 08:45 UTC9h 5m
2026-07-04 OCN601 FRA → RSW Jul 4, 11:40 UTCJul 4, 21:35 UTC9h 55m
2026-07-03 OCN539 MSP → FRA Jul 3, 21:10 UTCJul 4, 04:45 UTC7h 35m
2026-07-03 OCN52 FRA → MSP Jul 3, 10:10 UTCJul 3, 19:10 UTC9h 0m
2026-07-02 OCN659 TPA → FRA Jul 2, 22:10 UTCJul 3, 06:45 UTC8h 35m
2026-07-02 OCN642 FRA → TPA Jul 2, 10:00 UTCJul 2, 19:55 UTC9h 55m
2026-07-01 OCN539 MSP → FRA Jul 1, 21:30 UTCJul 2, 05:10 UTC7h 40m
2026-07-01 OCN52 FRA → MSP Jul 1, 10:05 UTCJul 1, 19:05 UTC9h 0m
2026-06-28 OCN617 RSW → FRA Jun 28, 00:45 UTCJun 28, 09:20 UTC8h 35m
2026-06-27 OCN601 FRA → RSW Jun 27, 11:50 UTCJun 27, 22:20 UTC10h 30m
2026-06-26 OCN539 MSP → FRA Jun 26, 21:35 UTCJun 27, 05:44 UTC8h 10m
2026-06-26 OCN52 FRA → MSP Jun 26, 10:25 UTCJun 26, 19:09 UTC8h 45m
2026-06-25 OCN659 TPA → FRA Jun 25, 22:14 UTCJun 26, 07:00 UTC8h 45m
2026-06-25 OCN642 FRA → TPA Jun 25, 10:04 UTCJun 25, 19:39 UTC9h 35m
2026-06-24 OCN51 - Jun 24, 22:10 UTCJun 25, 05:05 UTC6h 55m
2026-06-24 OCN50 FRA → PHL Jun 24, 11:45 UTCJun 24, 19:59 UTC8h 15m
2026-06-23 OCN77 - Jun 23, 23:44 UTCJun 24, 08:30 UTC8h 45m

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

Mode-S 3C5B31 frequently asked

What is Mode-S code 3C5B31?
3C5B31 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AFYQ.
Where is Mode-S 3C5B31 registered?
Mode-S code 3C5B31 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C5B31 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C5B31, octal 17055461, decimal 3,955,505.
What flights does 3C5B31 operate?
Mode-S 3C5B31 has broadcast 20 distinct callsigns, including OCN68, OCN69, OCN659, OCN642, OCN133.