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sensors Mode-S transponder

4951D5

ICAO 24-bit transponder address · allocated to Portugal

Currently assigned to CS-TNU · AIRBUS A-320

Hex
4951D5
Octal
22250725
Decimal
4,805,077
Country
PT
Tail
CS-TNU
Type
A320
No current signal · last broadcast Jul 26, 19:45 UTC
Flights observed
482
Distinct callsigns
20
Country
PT
Last broadcast
Jul 26, 19:45 UTC

Last known position

Most recent position reported by Mode-S 4951D5.

Country allocation

The ICAO 24-bit address 4951D5 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 2026-05-24
TAP5AS TAP Portugal 8 2026-07-17
TAP9RH - 7 2026-07-03
TAP934 - 7 2026-07-08
TAP826 - 7 2026-07-03
TAP72LP - 7 2026-07-17
TAP1705 TAP Portugal 7 2026-05-22
TAP1702 TAP Portugal 7 2026-05-24
TAP1685 - 7 2026-07-16
TAP921 TAP Portugal 6 2026-06-15
TAP920 - 6 2026-06-15
TAP827V - 6 2026-07-03
TAP825 - 6 2026-07-07
TAP824 - 6 2026-07-07
TAP433 - 6 2026-07-08
TAP10MD TAP Portugal 6 2026-07-26
TAP93MA TAP Portugal 5 2026-06-01
TAP86PZ - 5 2026-07-05
TAP86GM - 5 2026-07-05
TAP645 TAP Portugal 5 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TAP862 LIS → VCE Jul 26, 19:25 UTCJul 26, 19:45 UTC20m
2026-07-26 TAP86VR LIS → VCE Jul 26, 14:20 UTCJul 26, 17:35 UTC3h 15m
2026-07-26 TAP11WQ MAD → LIS Jul 26, 10:10 UTCJul 26, 11:05 UTC55m
2026-07-26 TAP10MD LIS → MAD Jul 26, 07:45 UTCJul 26, 08:50 UTC1h 5m
2026-07-25 TAP555 MUC → LIS Jul 25, 18:15 UTCJul 25, 21:10 UTC2h 55m
2026-07-25 TAP554M LIS → MUC Jul 25, 14:35 UTCJul 25, 17:05 UTC2h 30m
2026-07-25 TAP831 FCO → LIS Jul 25, 10:05 UTCJul 25, 13:05 UTC3h 0m
2026-07-25 TAP830 LIS → FCO Jul 25, 06:20 UTCJul 25, 08:35 UTC2h 15m
2026-07-24 TAP555 MUC → LIS Jul 24, 18:30 UTCJul 24, 21:35 UTC3h 5m
2026-07-24 TAP554M LIS → MUC Jul 24, 14:15 UTCJul 24, 16:50 UTC2h 35m
2026-07-24 TAP831 FCO → LIS Jul 24, 09:50 UTCJul 24, 12:40 UTC2h 50m
2026-07-24 TAP830 LIS → FCO Jul 24, 05:45 UTCJul 24, 08:05 UTC2h 20m
2026-07-23 TAP15NC - Jul 23, 15:15 UTCJul 23, 16:30 UTC1h 15m
2026-07-23 TAP14NC LIS → MAD Jul 23, 12:45 UTCJul 23, 13:45 UTC1h 0m
2026-07-23 TAP575 FRA → LIS Jul 23, 04:25 UTCJul 23, 07:25 UTC3h 0m
2026-07-22 TAP57LK LIS → FRA Jul 22, 17:45 UTCJul 22, 20:15 UTC2h 30m
2026-07-22 TAP31DB - Jul 22, 11:50 UTCJul 22, 15:10 UTC3h 20m
2026-07-22 TAP1908 FAO → LIS Jul 22, 05:20 UTCJul 22, 05:25 UTC5m
2026-07-21 TAP1907 LIS → FAO Jul 21, 22:20 UTCJul 21, 22:50 UTC30m
2026-07-21 TAP1313 MAN → LIS Jul 21, 18:20 UTCJul 21, 20:55 UTC2h 35m
2026-07-21 TAP1312 LIS → MAN Jul 21, 14:05 UTCJul 21, 16:50 UTC2h 45m
2026-07-21 TAP1923 OPO → LIS Jul 21, 09:05 UTCJul 21, 09:55 UTC50m
2026-07-21 TAP1922 LIS → OPO Jul 21, 07:30 UTCJul 21, 08:00 UTC30m
2026-07-20 TAP437X ORY → LIS Jul 20, 18:00 UTCJul 20, 20:20 UTC2h 20m
2026-07-20 TAP436 LIS → ORY Jul 20, 14:50 UTCJul 20, 16:35 UTC1h 45m
2026-07-20 TAP869 - Jul 20, 10:40 UTCJul 20, 13:40 UTC3h 0m
2026-07-20 TAP868 LIS → BLQ Jul 20, 07:10 UTCJul 20, 09:25 UTC2h 15m
2026-07-19 TAP93ZS ZRH → LIS Jul 19, 16:35 UTCJul 19, 19:15 UTC2h 40m
2026-07-19 TAP932 LIS → ZRH Jul 19, 13:00 UTCJul 19, 15:20 UTC2h 20m
2026-07-19 TAP757P CPH → LIS Jul 19, 04:20 UTCJul 19, 07:40 UTC3h 20m
2026-07-18 TAP6CY LIS → CPH Jul 18, 17:55 UTCJul 18, 20:50 UTC2h 55m
2026-07-18 TAP75CH - Jul 18, 11:35 UTCJul 18, 15:15 UTC3h 40m
2026-07-18 TAP752 LIS → CPH Jul 18, 06:45 UTCJul 18, 09:50 UTC3h 5m
2026-07-17 TAP5AS FRA → LIS Jul 17, 18:50 UTCJul 17, 21:44 UTC2h 55m
2026-07-17 TAP72LP LIS → FRA Jul 17, 15:00 UTCJul 17, 17:25 UTC2h 25m
2026-07-17 TAP43JD ORY → LIS Jul 17, 10:20 UTCJul 17, 12:45 UTC2h 25m
2026-07-17 TAP43PA LIS → ORY Jul 17, 06:54 UTCJul 17, 08:49 UTC1h 55m
2026-07-16 TAP783 ARN → LIS Jul 16, 17:30 UTCJul 16, 21:35 UTC4h 5m
2026-07-16 TAP782 LIS → ARN Jul 16, 12:00 UTCJul 16, 15:49 UTC3h 50m
2026-07-16 TAP68JP FNC → LIS Jul 16, 08:30 UTCJul 16, 09:50 UTC1h 20m
2026-07-16 TAP1685 - Jul 16, 07:10 UTCJul 16, 07:20 UTC10m
2026-07-16 TAP1685 - Jul 16, 05:50 UTCJul 16, 06:40 UTC50m
2026-07-15 TAP835 - Jul 15, 16:05 UTCJul 15, 18:55 UTC2h 50m
2026-07-15 TAP83K - Jul 15, 12:20 UTCJul 15, 14:45 UTC2h 25m
2026-07-15 TAP1023 - Jul 15, 06:05 UTCJul 15, 07:05 UTC1h 0m
2026-07-14 TAP1022 - Jul 14, 21:20 UTCJul 14, 22:15 UTC55m
2026-07-14 TAP93ZS ZRH → LIS Jul 14, 16:35 UTCJul 14, 19:20 UTC2h 45m
2026-07-14 TAP932 LIS → ZRH Jul 14, 13:15 UTCJul 14, 15:25 UTC2h 10m
2026-07-14 TAP9004 - Jul 14, 02:50 UTCJul 14, 06:00 UTC3h 10m
2026-07-13 TAP9003 - Jul 13, 22:50 UTCJul 14, 01:35 UTC2h 45m

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

Mode-S 4951D5 frequently asked

What is Mode-S code 4951D5?
4951D5 is an ICAO 24-bit transponder address. Allocated to Portugal. Assigned to CS-TNU.
Where is Mode-S 4951D5 registered?
Mode-S code 4951D5 is allocated to Portugal (PT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4951D5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4951D5, octal 22250725, decimal 4,805,077.
What flights does 4951D5 operate?
Mode-S 4951D5 has broadcast 20 distinct callsigns, including TAP1701, TAP5AS, TAP9RH, TAP934, TAP826.