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 Jul 26, 22:55 UTC
Flights observed
514
Distinct callsigns
20
Country
PT
Last broadcast
Jul 26, 22:55 UTC

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
TAP97LS - 8 2026-07-17
TAP86PZ - 8 2026-07-06
TAP1907 TAP Portugal 8 2026-07-26
TAP1702 - 8 2026-07-02
TAP72LP - 7 2026-07-06
TAP56DT TAP Portugal 7 2026-05-24
TAP555 TAP Portugal 7 2026-07-26
TAP554M TAP Portugal 7 2026-07-26
TAP31TY - 7 2026-07-02
TAP1908 - 7 2026-07-10
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
TAP93ZR TAP Portugal 6 2026-07-23
TAP931L TAP Portugal 6 2026-07-23
TAP645 - 6 2026-07-20
TAP5AS - 6 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TAP1907 LIS → FAO Jul 26, 22:25 UTCJul 26, 22:55 UTC30m
2026-07-26 TAP555 MUC → LIS Jul 26, 18:15 UTCJul 26, 21:00 UTC2h 45m
2026-07-26 TAP554M LIS → MUC Jul 26, 14:10 UTCJul 26, 17:05 UTC2h 55m
2026-07-26 TAP641 BRU → LIS Jul 26, 10:20 UTCJul 26, 12:45 UTC2h 25m
2026-07-26 TAP640 LIS → BRU Jul 26, 06:50 UTCJul 26, 09:20 UTC2h 30m
2026-07-25 TAP1127 - Jul 25, 12:40 UTCJul 25, 14:20 UTC1h 40m
2026-07-25 TAP26TS LIS → TFS Jul 25, 09:20 UTCJul 25, 11:10 UTC1h 50m
2026-07-25 TAP53EI BER → LIS Jul 25, 04:15 UTCJul 25, 07:40 UTC3h 25m
2026-07-24 TAP4BE LIS → BER Jul 24, 17:20 UTCJul 24, 20:15 UTC2h 55m
2026-07-24 TAP553R MUC → LIS Jul 24, 12:05 UTCJul 24, 15:10 UTC3h 5m
2026-07-24 TAP552N LIS → MUC Jul 24, 08:05 UTCJul 24, 10:40 UTC2h 35m
2026-07-23 TAP1933 OPO → LIS Jul 23, 20:25 UTCJul 23, 21:15 UTC50m
2026-07-23 TAP1934 LIS → OPO Jul 23, 19:00 UTCJul 23, 19:30 UTC30m
2026-07-23 TAP931L ZRH → LIS Jul 23, 12:35 UTCJul 23, 15:10 UTC2h 35m
2026-07-23 TAP93ZR LIS → ZRH Jul 23, 08:35 UTCJul 23, 10:50 UTC2h 15m
2026-07-22 TAP933 ZRH → LIS Jul 22, 20:30 UTCJul 22, 21:25 UTC55m
2026-07-22 TAP93ZS ZRH → ZRH Jul 22, 16:20 UTCJul 22, 19:25 UTC3h 5m
2026-07-22 TAP932 LIS → ZRH Jul 22, 12:50 UTCJul 22, 15:05 UTC2h 15m
2026-07-22 TAP1031 - Jul 22, 11:10 UTCJul 22, 11:30 UTC20m
2026-07-21 TAP127M VIE → LIS Jul 21, 18:35 UTCJul 21, 21:50 UTC3h 15m
2026-07-21 TAP1272 LIS → VIE Jul 21, 14:35 UTCJul 21, 17:35 UTC3h 0m
2026-07-21 TAP1335 LGW → OPO Jul 21, 10:00 UTCJul 21, 12:10 UTC2h 10m
2026-07-21 TAP34A LIS → LGW Jul 21, 06:25 UTCJul 21, 08:35 UTC2h 10m
2026-07-20 TAP645 - Jul 20, 20:25 UTCJul 20, 22:55 UTC2h 30m
2026-07-20 TAP44BR LIS → BRU Jul 20, 17:10 UTCJul 20, 19:20 UTC2h 10m
2026-07-20 TAP823 MXP → LIS Jul 20, 10:35 UTCJul 20, 13:05 UTC2h 30m
2026-07-20 TAP22MX LIS → MXP Jul 20, 07:00 UTCJul 20, 09:15 UTC2h 15m
2026-07-19 TAP1155 MAH → LIS Jul 19, 18:45 UTCJul 19, 20:35 UTC1h 50m
2026-07-19 TAP54MH LIS → MAH Jul 19, 14:50 UTCJul 19, 16:25 UTC1h 35m
2026-07-19 TAP88TM FNC → LIS Jul 19, 12:00 UTCJul 19, 13:20 UTC1h 20m
2026-07-19 TAP1687 LIS → FNC Jul 19, 09:25 UTCJul 19, 11:00 UTC1h 35m
2026-07-19 TAP8RL FCO → LIS Jul 19, 04:05 UTCJul 19, 06:50 UTC2h 45m
2026-07-18 TAP838Z LIS → FCO Jul 18, 19:40 UTCJul 18, 22:05 UTC2h 25m
2026-07-18 TAP35BL BCN → LIS Jul 18, 16:30 UTCJul 18, 18:10 UTC1h 40m
2026-07-18 TAP1034 LIS → BCN Jul 18, 13:35 UTCJul 18, 15:00 UTC1h 25m
2026-07-18 TAP9261 LIS → OPO Jul 18, 08:35 UTCJul 18, 10:00 UTC1h 25m
2026-07-17 TAP97LS PXO → FNC Jul 17, 00:20 UTCJul 17, 00:35 UTC15m
2026-07-16 TAP97LS - Jul 16, 23:05 UTCJul 16, 23:49 UTC45m
2026-07-16 TAP835 - Jul 16, 16:40 UTCJul 16, 19:35 UTC2h 55m
2026-07-16 TAP83K - Jul 16, 12:20 UTCJul 16, 14:45 UTC2h 25m
2026-07-16 TAP1925 OPO → LIS Jul 16, 10:10 UTCJul 16, 10:55 UTC45m
2026-07-16 TAP1924 LIS → OPO Jul 16, 08:35 UTCJul 16, 09:05 UTC30m
2026-07-16 TAP1023 - Jul 16, 06:00 UTCJul 16, 07:05 UTC1h 5m
2026-07-15 TAP1022 LIS → MAD Jul 15, 21:45 UTCJul 15, 22:35 UTC50m
2026-07-15 TAP69UX - Jul 15, 16:50 UTCJul 15, 19:50 UTC3h 0m
2026-07-15 TAP69D LIS → LUX Jul 15, 13:10 UTCJul 15, 15:25 UTC2h 15m
2026-07-15 TAP1031 BCN → LIS Jul 15, 09:45 UTCJul 15, 11:25 UTC1h 40m
2026-07-15 TAP30BC LIS → BCN Jul 15, 07:15 UTCJul 15, 08:40 UTC1h 25m
2026-07-14 TAP827V MXP → LIS Jul 14, 18:15 UTCJul 14, 20:55 UTC2h 40m
2026-07-14 TAP826 LIS → MXP Jul 14, 14:45 UTCJul 14, 17:00 UTC2h 15m

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 Jul 26, 22:55 UTC.
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, TAP97LS, TAP86PZ, TAP1907, TAP1702.