Apparatus

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sensors Mode-S transponder

4952A1

ICAO 24-bit transponder address · allocated to Portugal

Currently assigned to CS-TUA · AIRBUS A-330-900

Hex
4952A1
Octal
22251241
Decimal
4,805,281
Country
PT
Tail
CS-TUA
Type
A339
No current signal · last broadcast 2h ago
Flights observed
182
Distinct callsigns
20
Country
PT
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4952A1.

Country allocation

The ICAO 24-bit address 4952A1 falls within the block assigned to Portugal (PT) by ICAO Annex 10, Volume III. Every aircraft registered in Portugal 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
TAP072 - 11 2026-07-01
TAP089 - 10 2026-07-13
TAP088 - 9 2026-07-14
TAP224 - 8 2026-07-09
TAP104 TAP Portugal 8 2026-05-27
TAP082 TAP Portugal 8 2026-06-04
TAP22MI - 7 2026-07-09
TAP073 - 7 2026-07-01
TAP210 - 6 2026-06-27
TAP209K - 6 2026-06-26
TAP084 - 6 2026-07-05
TAP011 - 6 2026-07-08
TAP203 - 5 2026-07-12
TAP118 - 5 2026-06-25
TAP028 - 5 2026-07-07
TAP282 TAP Portugal 4 2026-05-23
TAP204A - 4 2026-07-13
TAP087 TAP Portugal 4 2026-05-15
TAP012 - 4 2026-07-09
TAP89WT TAP Portugal 3 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 TAP088 - Jul 14, 01:55 UTCJul 14, 04:50 UTC2h 55m
2026-07-13 TAP089 LIS → GRU Jul 13, 13:50 UTCJul 13, 23:50 UTC10h 0m
2026-07-13 TAP204A EWR → LIS Jul 13, 04:20 UTCJul 13, 10:45 UTC6h 25m
2026-07-12 TAP203 LIS → EWR Jul 12, 18:15 UTCJul 13, 01:25 UTC7h 10m
2026-07-12 TAP248 - Jul 12, 00:45 UTCJul 12, 11:20 UTC10h 35m
2026-07-11 TAP247 - Jul 11, 09:50 UTCJul 11, 21:10 UTC11h 20m
2026-07-10 TAP057 - Jul 10, 10:20 UTCJul 11, 05:45 UTC19h 25m
2026-07-09 TAP224 - Jul 9, 21:40 UTCJul 10, 05:15 UTC7h 35m
2026-07-09 TAP22MI LIS → MIA Jul 9, 11:00 UTCJul 9, 19:05 UTC8h 5m
2026-07-09 TAP012 - Jul 9, 01:50 UTCJul 9, 08:45 UTC6h 55m
2026-07-08 TAP011 - Jul 8, 16:45 UTCJul 8, 23:55 UTC7h 10m
2026-07-07 TAP028 LIS → LIS Jul 7, 16:45 UTCJul 8, 10:35 UTC17h 50m
2026-07-06 TAP110 - Jul 6, 18:55 UTCJul 7, 13:00 UTC18h 5m
2026-07-06 TAP110 - Jul 6, 14:20 UTCJul 7, 13:00 UTC22h 40m
2026-07-06 TAP110 - Jul 6, 12:35 UTCJul 7, 12:15 UTC23h 40m
2026-07-06 TAP012 - Jul 6, 02:05 UTCJul 6, 08:55 UTC6h 50m
2026-07-06 TAP011 - Jul 6, 00:00 UTCJul 6, 00:20 UTC20m
2026-07-05 TAP011 - Jul 5, 17:25 UTCJul 5, 19:10 UTC1h 45m
2026-07-05 TAP084 - Jul 5, 13:20 UTCJul 5, 13:55 UTC35m
2026-07-05 TAP084 - Jul 5, 04:45 UTCJul 5, 13:15 UTC8h 30m
2026-07-04 TAP083 - Jul 4, 17:15 UTCJul 5, 02:50 UTC9h 35m
2026-07-04 TAP204A - Jul 4, 06:35 UTCJul 4, 13:00 UTC6h 25m
2026-07-04 TAP203 BOS → EWR Jul 4, 03:10 UTCJul 4, 04:00 UTC50m
2026-07-03 TAP203 LIS → BOS Jul 3, 17:35 UTCJul 4, 00:40 UTC7h 5m
2026-07-02 TAP028 LIS → LIS Jul 2, 16:50 UTCJul 3, 10:25 UTC17h 35m
2026-07-01 TAP072 - Jul 1, 23:55 UTCJul 2, 08:45 UTC8h 50m
2026-07-01 TAP073 - Jul 1, 11:40 UTCJul 1, 20:35 UTC8h 55m
2026-06-30 TAP072 - Jun 30, 23:20 UTCJul 1, 08:20 UTC9h 0m
2026-06-30 TAP073 - Jun 30, 10:50 UTCJun 30, 20:15 UTC9h 25m
2026-06-30 TAP012 - Jun 30, 06:40 UTCJun 30, 08:20 UTC1h 40m
2026-06-30 TAP012 - Jun 30, 01:30 UTCJun 30, 01:50 UTC20m
2026-06-29 TAP011 - Jun 29, 23:25 UTCJun 29, 23:49 UTC25m
2026-06-29 TAP011 - Jun 29, 16:39 UTCJun 29, 18:25 UTC1h 45m
2026-06-28 TAP072 - Jun 28, 23:20 UTCJun 29, 08:19 UTC9h 0m
2026-06-28 TAP073 - Jun 28, 11:09 UTCJun 28, 20:34 UTC9h 25m
2026-06-27 TAP072 - Jun 27, 23:29 UTCJun 28, 08:44 UTC9h 15m
2026-06-27 TAP073 - Jun 27, 11:09 UTCJun 27, 20:19 UTC9h 10m
2026-06-27 TAP210 JFK → LIS Jun 27, 03:15 UTCJun 27, 09:15 UTC6h 0m
2026-06-26 TAP209K LIS → JFK Jun 26, 16:44 UTCJun 27, 00:14 UTC7h 30m
2026-06-25 TAP118 - Jun 25, 19:09 UTCJun 26, 11:34 UTC16h 25m
2026-06-25 TAP118 - Jun 25, 14:20 UTCJun 26, 11:34 UTC21h 15m
2026-06-25 TAP118 LIS → LIS Jun 25, 12:40 UTCJun 26, 11:34 UTC22h 55m
2026-06-25 TAP088 - Jun 25, 00:49 UTCJun 25, 10:15 UTC9h 25m
2026-06-24 TAP089 - Jun 24, 12:44 UTCJun 24, 22:19 UTC9h 35m
2026-06-23 TAP072 - Jun 23, 23:29 UTCJun 24, 08:49 UTC9h 20m
2026-06-23 TAP073 LIS → GIG Jun 23, 10:49 UTCJun 23, 20:29 UTC9h 40m
2026-06-22 TAP210 JFK → LIS Jun 22, 02:50 UTCJun 22, 08:54 UTC6h 5m
2026-06-21 TAP209K LIS → JFK Jun 21, 16:30 UTCJun 21, 23:40 UTC7h 10m
2026-06-21 TAP248 - Jun 21, 00:19 UTCJun 21, 10:25 UTC10h 5m
2026-06-20 TAP247 - Jun 20, 09:34 UTCJun 20, 21:00 UTC11h 25m

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 CS-TUA page for operator, model, and routing details .

Mode-S 4952A1 frequently asked

What is Mode-S code 4952A1?
4952A1 is an ICAO 24-bit transponder address. Allocated to Portugal. Assigned to CS-TUA.
Where is Mode-S 4952A1 registered?
Mode-S code 4952A1 is allocated to Portugal (PT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4952A1 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4952A1, octal 22251241, decimal 4,805,281.
What flights does 4952A1 operate?
Mode-S 4952A1 has broadcast 20 distinct callsigns, including TAP072, TAP089, TAP088, TAP224, TAP104.