Apparatus

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sensors Mode-S transponder

4951D4

ICAO 24-bit transponder address · allocated to Portugal

Currently assigned to CS-TNT · AIRBUS A-320

Hex
4951D4
Octal
22250724
Decimal
4,805,076
Country
PT
Tail
CS-TNT
Type
A320
No current signal · last broadcast 12h ago
Flights observed
464
Distinct callsigns
20
Country
PT
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 4951D4.

Country allocation

The ICAO 24-bit address 4951D4 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
TAP86GM - 9 2026-07-06
TAP86PZ - 8 2026-07-06
TAP1702 - 8 2026-07-02
TAP72LP - 7 2026-07-06
TAP56DT TAP Portugal 7 2026-05-24
TAP31TY - 7 2026-07-02
TAP1908 - 7 2026-07-10
TAP1907 - 7 2026-07-09
TAP1705 - 7 2026-07-01
TAP1701 - 7 2026-07-02
TAP16LN TAP Portugal 7 2026-06-10
TAP1330 - 7 2026-07-02
TAP98CX TAP Portugal 6 2026-05-20
TAP97LS TAP Portugal 6 2026-05-20
TAP5AS - 6 2026-07-06
TAP560 TAP Portugal 6 2026-05-24
TAP555 - 6 2026-06-17
TAP554M TAP Portugal 6 2026-06-17
TAP1329 - 6 2026-06-19
TAP1328 - 6 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 TAP645 BRU → LIS Jul 13, 19:15 UTCJul 13, 22:05 UTC2h 50m
2026-07-13 TAP44BR LIS → BRU Jul 13, 15:50 UTCJul 13, 18:05 UTC2h 15m
2026-07-13 TAP931L ZRH → LIS Jul 13, 11:45 UTCJul 13, 14:15 UTC2h 30m
2026-07-13 TAP93ZR LIS → ZRH Jul 13, 08:05 UTCJul 13, 10:30 UTC2h 25m
2026-07-12 TAP9036 LIS → LIS Jul 12, 21:40 UTCJul 13, 06:01 UTC8h 20m
2026-07-12 TAP1313 MAN → LIS Jul 12, 17:50 UTCJul 12, 20:15 UTC2h 25m
2026-07-12 TAP1312 LIS → MAN Jul 12, 13:55 UTCJul 12, 16:15 UTC2h 20m
2026-07-12 TAP443 ORY → LIS Jul 12, 05:45 UTCJul 12, 08:01 UTC2h 15m
2026-07-11 TAP56UG OPO → ORY Jul 11, 19:15 UTCJul 11, 21:00 UTC1h 45m
2026-07-11 TAP1932 LIS → OPO Jul 11, 17:30 UTCJul 11, 18:10 UTC40m
2026-07-11 TAP15NC - Jul 11, 15:00 UTCJul 11, 16:05 UTC1h 5m
2026-07-11 TAP14NC LIS → MAD Jul 11, 12:50 UTCJul 11, 13:50 UTC1h 0m
2026-07-11 TAP429 ORY → LIS Jul 11, 08:15 UTCJul 11, 10:30 UTC2h 15m
2026-07-11 TAP428 LIS → ORY Jul 11, 05:05 UTCJul 11, 07:05 UTC2h 0m
2026-07-10 TAP645 BRU → LIS Jul 10, 19:10 UTCJul 10, 21:45 UTC2h 35m
2026-07-10 TAP44BR LIS → BRU Jul 10, 15:35 UTCJul 10, 17:55 UTC2h 20m
2026-07-10 TAP931L ZRH → LIS Jul 10, 11:50 UTCJul 10, 14:20 UTC2h 30m
2026-07-10 TAP93ZR LIS → ZRH Jul 10, 07:55 UTCJul 10, 10:30 UTC2h 35m
2026-07-10 TAP1908 FAO → LIS Jul 10, 05:15 UTCJul 10, 05:45 UTC30m
2026-07-09 TAP1907 LIS → FAO Jul 9, 22:15 UTCJul 9, 22:50 UTC35m
2026-07-09 TAP863Y - Jul 9, 17:35 UTCJul 9, 20:25 UTC2h 50m
2026-07-09 TAP86VR LIS → VCE Jul 9, 13:50 UTCJul 9, 16:25 UTC2h 35m
2026-07-09 TAP43JD ORY → LIS Jul 9, 10:05 UTCJul 9, 12:20 UTC2h 15m
2026-07-09 TAP43PA LIS → ORY Jul 9, 06:55 UTCJul 9, 08:55 UTC2h 0m
2026-07-08 TAP553R - Jul 8, 12:00 UTCJul 8, 14:50 UTC2h 50m
2026-07-08 TAP552N LIS → MUC Jul 8, 07:50 UTCJul 8, 10:30 UTC2h 40m
2026-07-08 TAP647 - Jul 8, 04:15 UTCJul 8, 06:40 UTC2h 25m
2026-07-07 TAP46RU LIS → BRU Jul 7, 19:20 UTCJul 7, 21:50 UTC2h 30m
2026-07-07 TAP2300 LIS → LIS Jul 7, 14:20 UTCJul 7, 17:45 UTC3h 25m
2026-07-07 TAP641 - Jul 7, 10:10 UTCJul 7, 12:40 UTC2h 30m
2026-07-07 TAP640 LIS → BRU Jul 7, 06:35 UTCJul 7, 09:00 UTC2h 25m
2026-07-06 TAP5AS FRA → LIS Jul 6, 18:25 UTCJul 6, 21:05 UTC2h 40m
2026-07-06 TAP72LP LIS → FRA Jul 6, 14:25 UTCJul 6, 17:10 UTC2h 45m
2026-07-06 TAP86GM VCE → LIS Jul 6, 10:05 UTCJul 6, 12:50 UTC2h 45m
2026-07-06 TAP86PZ - Jul 6, 06:15 UTCJul 6, 08:50 UTC2h 35m
2026-07-05 TAP543W DUS → LIS Jul 5, 19:20 UTCJul 5, 22:00 UTC2h 40m
2026-07-05 TAP542U LIS → DUS Jul 5, 15:35 UTCJul 5, 18:10 UTC2h 35m
2026-07-05 TAP691P - Jul 5, 10:55 UTCJul 5, 13:25 UTC2h 30m
2026-07-05 TAP6LX LIS → LUX Jul 5, 07:15 UTCJul 5, 09:35 UTC2h 20m
2026-07-05 TAP1908 FAO → LIS Jul 5, 05:20 UTCJul 5, 05:55 UTC35m
2026-07-04 TAP1907 LIS → FAO Jul 4, 22:25 UTCJul 4, 22:55 UTC30m
2026-07-04 TAP863Y - Jul 4, 17:55 UTCJul 4, 20:40 UTC2h 45m
2026-07-04 TAP86VR LIS → VCE Jul 4, 13:55 UTCJul 4, 16:40 UTC2h 45m
2026-07-04 TAP143P - Jul 4, 11:25 UTCJul 4, 12:20 UTC55m
2026-07-04 TAP1436 - Jul 4, 09:10 UTCJul 4, 10:10 UTC1h 0m
2026-07-04 TAP1939 OPO → LIS Jul 4, 06:15 UTCJul 4, 06:50 UTC35m
2026-07-03 TAP9014 OPO → OPO Jul 3, 08:25 UTCJul 3, 17:10 UTC8h 45m
2026-07-02 TAP31TY LGW → OPO Jul 2, 21:45 UTCJul 2, 23:40 UTC1h 55m
2026-07-02 TAP1330 OPO → LGW Jul 2, 18:40 UTCJul 2, 20:25 UTC1h 45m
2026-07-02 TAP921 ZRH → OPO Jul 2, 14:10 UTCJul 2, 16:20 UTC2h 10m

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

Mode-S 4951D4 frequently asked

What is Mode-S code 4951D4?
4951D4 is an ICAO 24-bit transponder address. Allocated to Portugal. Assigned to CS-TNT.
Where is Mode-S 4951D4 registered?
Mode-S code 4951D4 is allocated to Portugal (PT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4951D4 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4951D4, octal 22250724, decimal 4,805,076.
What flights does 4951D4 operate?
Mode-S 4951D4 has broadcast 20 distinct callsigns, including TAP86GM, TAP86PZ, TAP1702, TAP72LP, TAP56DT.