Apparatus

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sensors Mode-S transponder

4951CE

ICAO 24-bit transponder address · allocated to Portugal

Currently assigned to CS-TNN · AIRBUS A-320

Hex
4951CE
Octal
22250716
Decimal
4,805,070
Country
PT
Tail
CS-TNN
Type
A320
No current signal · last broadcast Jul 26, 20:45 UTC
Flights observed
516
Distinct callsigns
20
Country
PT
Last broadcast
Jul 26, 20:45 UTC

Last known position

Most recent position reported by Mode-S 4951CE.

Country allocation

The ICAO 24-bit address 4951CE 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
TAP1701 TAP Portugal 11 2026-06-11
TAP1702 TAP Portugal 10 2026-06-11
TAP9RH TAP Portugal 9 2026-07-25
TAP934 TAP Portugal 9 2026-07-24
TAP93ZS TAP Portugal 8 2026-06-14
TAP647 TAP Portugal 8 2026-07-19
TAP97LS TAP Portugal 7 2026-07-23
TAP932 TAP Portugal 7 2026-06-14
TAP1923 - 7 2026-07-15
TAP1908 - 7 2026-07-13
TAP1907 - 7 2026-07-12
TAP1330 TAP Portugal 7 2026-06-11
TAP98CX TAP Portugal 6 2026-07-23
TAP86VR - 6 2026-07-12
TAP863Y - 6 2026-07-12
TAP46RU - 6 2026-07-18
TAP31TY TAP Portugal 6 2026-06-11
TAP1922 - 6 2026-07-15
TAP939 TAP Portugal 5 2026-06-09
TAP938 TAP Portugal 5 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TAP437X ORY → LIS Jul 26, 18:35 UTCJul 26, 20:40 UTC2h 5m
2026-07-26 TAP436 LIS → ORY Jul 26, 15:15 UTCJul 26, 17:25 UTC2h 10m
2026-07-26 TAP88TM FNC → LIS Jul 26, 11:55 UTCJul 26, 13:15 UTC1h 20m
2026-07-26 TAP1687 LIS → FNC Jul 26, 10:35 UTCJul 26, 10:45 UTC10m
2026-07-26 TAP1687 LIS → FNC Jul 26, 09:20 UTCJul 26, 10:05 UTC45m
2026-07-26 TAP56DP HAM → LIS Jul 26, 04:10 UTCJul 26, 07:00 UTC2h 51m
2026-07-25 TAP564C LIS → HAM Jul 25, 17:50 UTCJul 25, 20:55 UTC3h 5m
2026-07-25 TAP10NL BCN → LIS Jul 25, 13:20 UTCJul 25, 15:10 UTC1h 50m
2026-07-25 TAP1032 OPO → BCN Jul 25, 10:25 UTCJul 25, 11:40 UTC1h 15m
2026-07-25 TAP9RH ZRH → LIS Jul 25, 04:35 UTCJul 25, 07:40 UTC3h 5m
2026-07-24 TAP934 LIS → ZRH Jul 24, 18:00 UTCJul 24, 20:25 UTC2h 25m
2026-07-24 TAP1143 IBZ → LIS Jul 24, 12:25 UTCJul 24, 14:00 UTC1h 35m
2026-07-24 TAP1142 LIS → IBZ Jul 24, 09:35 UTCJul 24, 10:55 UTC1h 20m
2026-07-24 TAP9RH ZRH → LIS Jul 24, 04:30 UTCJul 24, 07:15 UTC2h 45m
2026-07-23 TAP934 LIS → ZRH Jul 23, 18:25 UTCJul 23, 20:40 UTC2h 15m
2026-07-23 TAP643 BRU → LIS Jul 23, 14:10 UTCJul 23, 16:40 UTC2h 30m
2026-07-23 TAP64BR LIS → BRU Jul 23, 10:40 UTCJul 23, 13:05 UTC2h 25m
2026-07-23 TAP98CX FNC → LIS Jul 23, 04:45 UTCJul 23, 06:00 UTC1h 15m
2026-07-23 TAP97LS LIS → FNC Jul 23, 00:15 UTCJul 23, 00:35 UTC20m
2026-07-22 TAP97LS LIS → FNC Jul 22, 23:00 UTCJul 22, 23:35 UTC35m
2026-07-22 TAP837 FCO → LIS Jul 22, 18:25 UTCJul 22, 21:25 UTC3h 0m
2026-07-22 TAP836A LIS → FCO Jul 22, 14:25 UTCJul 22, 16:45 UTC2h 20m
2026-07-22 TAP691P LUX → LIS Jul 22, 11:25 UTCJul 22, 13:10 UTC1h 45m
2026-07-21 TAP35MT OPO → LIS Jul 21, 22:00 UTCJul 21, 22:40 UTC40m
2026-07-21 TAP921 ZRH → OPO Jul 21, 18:00 UTCJul 21, 20:15 UTC2h 15m
2026-07-21 TAP920 LIS → ZRH Jul 21, 14:50 UTCJul 21, 16:55 UTC2h 5m
2026-07-21 TAP1329 LGW → OPO Jul 21, 11:45 UTCJul 21, 13:40 UTC1h 55m
2026-07-21 TAP1328 OPO → LGW Jul 21, 08:20 UTCJul 21, 10:15 UTC1h 55m
2026-07-21 TAP1920 LIS → OPO Jul 21, 06:50 UTCJul 21, 07:20 UTC30m
2026-07-20 TAP1017 - Jul 20, 17:05 UTCJul 20, 18:10 UTC1h 5m
2026-07-20 TAP10AD LIS → MAD Jul 20, 14:55 UTCJul 20, 15:50 UTC55m
2026-07-20 TAP1013 - Jul 20, 12:25 UTCJul 20, 13:40 UTC1h 15m
2026-07-20 TAP12LM - Jul 20, 09:40 UTCJul 20, 10:30 UTC50m
2026-07-20 TAP9RH ZRH → LIS Jul 20, 04:30 UTCJul 20, 07:20 UTC2h 50m
2026-07-19 TAP934 LIS → ZRH Jul 19, 18:20 UTCJul 19, 20:45 UTC2h 25m
2026-07-19 TAP1127 - Jul 19, 12:40 UTCJul 19, 14:15 UTC1h 35m
2026-07-19 TAP26TS - Jul 19, 09:20 UTCJul 19, 11:15 UTC1h 55m
2026-07-19 TAP647 BRU → LIS Jul 19, 04:15 UTCJul 19, 06:45 UTC2h 30m
2026-07-18 TAP46RU LIS → BRU Jul 18, 21:20 UTCJul 18, 23:35 UTC2h 15m
2026-07-18 TAP1337 LGW → LIS Jul 18, 17:45 UTCJul 18, 20:05 UTC2h 20m
2026-07-18 TAP13CT LIS → LGW Jul 18, 13:45 UTCJul 18, 15:55 UTC2h 10m
2026-07-17 TAP1243 PRG → LIS Jul 17, 18:55 UTCJul 17, 22:49 UTC3h 55m
2026-07-17 TAP1242 LIS → PRG Jul 17, 14:44 UTCJul 17, 17:30 UTC2h 45m
2026-07-17 TAP641 - Jul 17, 10:00 UTCJul 17, 12:30 UTC2h 30m
2026-07-17 TAP640 LIS → BRU Jul 17, 06:25 UTCJul 17, 08:40 UTC2h 15m
2026-07-16 TAP645 - Jul 16, 19:25 UTCJul 16, 22:00 UTC2h 35m
2026-07-16 TAP44BR LIS → BRU Jul 16, 15:40 UTCJul 16, 17:49 UTC2h 10m
2026-07-16 TAP941 GVA → LIS Jul 16, 11:25 UTCJul 16, 14:00 UTC2h 35m
2026-07-16 TAP40GV LIS → GVA Jul 16, 08:10 UTCJul 16, 10:04 UTC1h 55m
2026-07-16 TAP96AW FNC → LIS Jul 16, 03:45 UTCJul 16, 05:05 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 CS-TNN page for operator, model, and routing details .

Mode-S 4951CE frequently asked

What is Mode-S code 4951CE?
4951CE is an ICAO 24-bit transponder address. Allocated to Portugal. Assigned to CS-TNN.
Where is Mode-S 4951CE registered?
Mode-S code 4951CE is allocated to Portugal (PT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4951CE broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4951CE, octal 22250716, decimal 4,805,070.
What flights does 4951CE operate?
Mode-S 4951CE has broadcast 20 distinct callsigns, including TAP1701, TAP1702, TAP9RH, TAP934, TAP93ZS.