Apparatus

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sensors Mode-S transponder

440B61

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-IXA · BOEING 737-800

Hex
440B61
Octal
21005541
Decimal
4,459,361
Country
AT
Tail
OE-IXA
Type
B738
No current signal · last broadcast 6h ago
Flights observed
200
Distinct callsigns
20
Country
AT
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 440B61.

Country allocation

The ICAO 24-bit address 440B61 falls within the block assigned to Austria (AT) by ICAO Annex 10, Volume III. Every aircraft registered in Austria 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
TAY7CA ASL Airlines Belgium 23 2026-05-18
TAY5IX - 20 2026-06-26
TAY6IX - 18 2026-06-26
TAY6CA ASL Airlines Belgium 17 2026-05-17
TAY6SF - 14 2026-07-13
TAY6DN - 11 2026-07-10
TAY5DN - 10 2026-07-10
TAY4VA - 9 2026-05-22
TAY8AN ASL Airlines Belgium 8 2026-04-23
TAY3SF - 8 2026-05-29
TAY5TR - 7 2026-07-12
TAY5VA ASL Airlines Belgium 6 2026-05-22
TAY4BC - 6 2026-07-06
TAY3BC - 6 2026-07-03
TAY2VQ ASL Airlines Belgium 6 2026-05-11
TAY9AN ASL Airlines Belgium 4 2026-04-23
TAY6TR ASL Airlines Belgium 3 2026-06-22
TAY1VQ - 3 2026-04-15
TAY9VX - 2 2026-05-21
TAY8LL - 2 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 TAY1MS - Jul 14, 02:10 UTCJul 14, 03:00 UTC50m
2026-07-13 TAY6SF - Jul 13, 19:30 UTCJul 13, 22:15 UTC2h 45m
2026-07-13 TAY6SF - Jul 13, 17:50 UTCJul 13, 18:25 UTC35m
2026-07-12 TAY5TR - Jul 12, 21:25 UTCJul 12, 21:55 UTC30m
2026-07-12 TAY5TR - Jul 12, 18:01 UTCJul 12, 20:20 UTC2h 20m
2026-07-10 TAY6DN BER → CDG Jul 10, 20:25 UTCJul 10, 21:50 UTC1h 25m
2026-07-10 TAY6DN - Jul 10, 18:20 UTCJul 10, 19:15 UTC55m
2026-07-10 TAY5DN - Jul 10, 04:05 UTCJul 10, 05:05 UTC1h 0m
2026-07-10 TAY5DN - Jul 10, 02:00 UTCJul 10, 03:00 UTC1h 0m
2026-07-09 TAY6DN MUC → CDG Jul 9, 21:15 UTCJul 9, 22:30 UTC1h 15m
2026-07-09 TAY6DN - Jul 9, 18:40 UTCJul 9, 19:45 UTC1h 5m
2026-07-09 TAY5DN - Jul 9, 04:00 UTCJul 9, 05:00 UTC1h 0m
2026-07-09 TAY5DN - Jul 9, 01:40 UTCJul 9, 02:45 UTC1h 5m
2026-07-08 TAY6DN MUC → CDG Jul 8, 21:15 UTCJul 8, 22:30 UTC1h 15m
2026-07-08 TAY6DN - Jul 8, 18:35 UTCJul 8, 19:45 UTC1h 10m
2026-07-08 TAY5DN - Jul 8, 05:30 UTCJul 8, 06:40 UTC1h 10m
2026-07-08 TAY5DN CDG → HAJ Jul 8, 02:35 UTCJul 8, 03:45 UTC1h 10m
2026-07-07 TAY6DN - Jul 7, 21:15 UTCJul 7, 22:25 UTC1h 10m
2026-07-07 TAY6DN - Jul 7, 18:55 UTCJul 7, 20:05 UTC1h 10m
2026-07-07 TAY5DN - Jul 7, 04:00 UTCJul 7, 05:00 UTC1h 0m
2026-07-07 TAY5DN CDG → HAJ Jul 7, 01:50 UTCJul 7, 03:00 UTC1h 10m
2026-07-06 TAY4BC BCN → CDG Jul 6, 21:10 UTCJul 6, 22:45 UTC1h 35m
2026-07-03 TAY3BC - Jul 3, 03:00 UTCJul 3, 04:15 UTC1h 15m
2026-07-02 TAY4BC BCN → CDG Jul 2, 21:25 UTCJul 2, 22:55 UTC1h 30m
2026-07-02 TAY3BC - Jul 2, 03:00 UTCJul 2, 04:10 UTC1h 10m
2026-07-01 TAY4BC BCN → CDG Jul 1, 21:30 UTCJul 1, 23:05 UTC1h 35m
2026-07-01 TAY3BC CDG → BCN Jul 1, 02:55 UTCJul 1, 04:15 UTC1h 20m
2026-06-30 TAY4BC BCN → CDG Jun 30, 21:35 UTCJun 30, 22:55 UTC1h 20m
2026-06-30 TAY3BC - Jun 30, 02:50 UTCJun 30, 04:05 UTC1h 15m
2026-06-29 TAY6SF - Jun 29, 19:29 UTCJun 29, 22:05 UTC2h 35m
2026-06-29 TAY6SF - Jun 29, 17:34 UTCJun 29, 18:10 UTC35m
2026-06-28 TAY5TR - Jun 28, 21:55 UTCJun 28, 22:34 UTC40m
2026-06-28 TAY5TR - Jun 28, 18:29 UTCJun 28, 20:59 UTC2h 30m
2026-06-26 TAY6IX - Jun 26, 19:55 UTCJun 26, 21:55 UTC2h 0m
2026-06-26 TAY6IX - Jun 26, 17:44 UTCJun 26, 18:34 UTC50m
2026-06-26 TAY5IX - Jun 26, 04:34 UTCJun 26, 05:35 UTC1h 0m
2026-06-26 TAY5IX CDG → CPH Jun 26, 02:05 UTCJun 26, 03:24 UTC1h 20m
2026-06-25 TAY6IX - Jun 25, 19:54 UTCJun 25, 22:04 UTC2h 10m
2026-06-25 TAY6IX - Jun 25, 17:44 UTCJun 25, 18:39 UTC55m
2026-06-25 TAY5IX - Jun 25, 04:29 UTCJun 25, 05:35 UTC1h 5m
2026-06-25 TAY5IX - Jun 25, 01:44 UTCJun 25, 03:04 UTC1h 20m
2026-06-24 TAY8KN PRG → CDG Jun 24, 20:40 UTCJun 24, 22:00 UTC1h 20m
2026-06-24 TAY5IX CPH → PRG Jun 24, 04:39 UTCJun 24, 05:34 UTC55m
2026-06-24 TAY5IX CDG → CPH Jun 24, 02:00 UTCJun 24, 03:24 UTC1h 25m
2026-06-23 TAY6IX - Jun 23, 19:50 UTCJun 23, 21:45 UTC1h 55m
2026-06-23 TAY5IX - Jun 23, 04:29 UTCJun 23, 05:49 UTC1h 20m
2026-06-23 TAY5IX CDG → CPH Jun 23, 01:54 UTCJun 23, 03:20 UTC1h 25m
2026-06-22 TAY6TR STR → CDG Jun 22, 20:34 UTCJun 22, 21:30 UTC55m
2026-06-20 TAY5NO CDG → STR Jun 20, 15:49 UTCJun 20, 16:44 UTC55m
2026-06-19 TAY8LL - Jun 19, 20:34 UTCJun 19, 21:54 UTC1h 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 OE-IXA page for operator, model, and routing details .

Mode-S 440B61 frequently asked

What is Mode-S code 440B61?
440B61 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-IXA.
Where is Mode-S 440B61 registered?
Mode-S code 440B61 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440B61 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440B61, octal 21005541, decimal 4,459,361.
What flights does 440B61 operate?
Mode-S 440B61 has broadcast 20 distinct callsigns, including TAY7CA, TAY5IX, TAY6IX, TAY6CA, TAY6SF.