Apparatus

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sensors Mode-S transponder

4951D2

ICAO 24-bit transponder address · allocated to Portugal

Currently assigned to CS-TNR · AIRBUS A-320

Hex
4951D2
Octal
22250722
Decimal
4,805,074
Country
PT
Tail
CS-TNR
Type
A320
No current signal · last broadcast Jul 26, 22:05 UTC
Flights observed
516
Distinct callsigns
20
Country
PT
Last broadcast
Jul 26, 22:05 UTC

Last known position

Most recent position reported by Mode-S 4951D2.

Country allocation

The ICAO 24-bit address 4951D2 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
TAP1329 - 11 2026-07-11
TAP1328 - 11 2026-07-11
TAP1920 - 9 2026-07-11
TAP35MT - 8 2026-06-26
TAP1705 - 8 2026-07-11
TAP939 - 7 2026-07-11
TAP938 - 7 2026-07-11
TAP83RS - 7 2026-07-19
TAP832 - 7 2026-07-19
TAP826 - 7 2026-07-15
TAP43PA TAP Portugal 7 2026-07-21
TAP43JD TAP Portugal 7 2026-07-21
TAP1908 - 7 2026-07-14
TAP1706 - 7 2026-07-11
TAP1023 TAP Portugal 7 2026-07-25
TAP1022 TAP Portugal 7 2026-07-24
TAP94VA TAP Portugal 6 2026-07-25
TAP827V - 6 2026-07-12
TAP72LP - 6 2026-07-21
TAP641 - 6 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TAP46RU LIS → BRU Jul 26, 19:30 UTCJul 26, 21:55 UTC2h 25m
2026-07-26 TAP1906 FAO → LIS Jul 26, 17:30 UTCJul 26, 17:55 UTC25m
2026-07-26 TAP1905 LIS → FAO Jul 26, 15:55 UTCJul 26, 16:30 UTC35m
2026-07-26 TAP1127 TFS → LIS Jul 26, 13:00 UTCJul 26, 14:40 UTC1h 40m
2026-07-26 TAP26TS LIS → TFS Jul 26, 09:30 UTCJul 26, 11:20 UTC1h 50m
2026-07-26 TAP9ML MXP → LIS Jul 26, 04:20 UTCJul 26, 06:50 UTC2h 31m
2026-07-25 TAP828 LIS → MXP Jul 25, 21:10 UTCJul 25, 23:15 UTC2h 5m
2026-07-25 TAP94VA GVA → LIS Jul 25, 17:30 UTCJul 25, 19:50 UTC2h 20m
2026-07-25 TAP42LV LIS → GVA Jul 25, 13:40 UTCJul 25, 15:45 UTC2h 5m
2026-07-25 TAP1023 MAD → LIS Jul 25, 04:55 UTCJul 25, 06:00 UTC1h 5m
2026-07-24 TAP1022 LIS → MAD Jul 24, 21:20 UTCJul 24, 22:20 UTC1h 0m
2026-07-24 TAP931L ZRH → LIS Jul 24, 11:55 UTCJul 24, 14:35 UTC2h 40m
2026-07-24 TAP93ZR LIS → ZRH Jul 24, 08:05 UTCJul 24, 10:25 UTC2h 20m
2026-07-24 TAP98CX FNC → LIS Jul 24, 05:05 UTCJul 24, 06:20 UTC1h 15m
2026-07-23 TAP16LN LIS → FNC Jul 23, 23:00 UTCJul 23, 23:15 UTC15m
2026-07-23 TAP16LN LIS → FNC Jul 23, 21:40 UTCJul 23, 22:30 UTC50m
2026-07-23 TAP1692 FNC → LIS Jul 23, 18:40 UTCJul 23, 19:55 UTC1h 15m
2026-07-23 TAP91SR - Jul 23, 17:25 UTCJul 23, 17:40 UTC15m
2026-07-23 TAP91SR - Jul 23, 16:05 UTCJul 23, 16:50 UTC45m
2026-07-23 TAP1143 IBZ → LIS Jul 23, 13:00 UTCJul 23, 14:35 UTC1h 35m
2026-07-23 TAP1142 LIS → IBZ Jul 23, 10:20 UTCJul 23, 11:40 UTC1h 20m
2026-07-23 TAP647 BRU → LIS Jul 23, 04:15 UTCJul 23, 06:50 UTC2h 35m
2026-07-22 TAP46RU LIS → BRU Jul 22, 19:55 UTCJul 22, 22:10 UTC2h 15m
2026-07-22 TAP56DT HAM → LIS Jul 22, 12:05 UTCJul 22, 15:25 UTC3h 20m
2026-07-21 TAP5AS FRA → LIS Jul 21, 18:05 UTCJul 21, 20:50 UTC2h 45m
2026-07-21 TAP72LP - Jul 21, 14:00 UTCJul 21, 16:20 UTC2h 20m
2026-07-21 TAP43JD ORY → LIS Jul 21, 10:10 UTCJul 21, 12:20 UTC2h 10m
2026-07-21 TAP43PA LIS → ORY Jul 21, 07:10 UTCJul 21, 09:10 UTC2h 0m
2026-07-20 TAP53ED - Jul 20, 16:00 UTCJul 20, 19:20 UTC3h 20m
2026-07-20 TAP532B LIS → BER Jul 20, 11:20 UTCJul 20, 14:25 UTC3h 5m
2026-07-20 TAP56DP HAM → LIS Jul 20, 04:15 UTCJul 20, 07:25 UTC3h 10m
2026-07-19 TAP564C LIS → HAM Jul 19, 17:25 UTCJul 19, 20:10 UTC2h 45m
2026-07-19 TAP83RS - Jul 19, 12:10 UTCJul 19, 15:00 UTC2h 50m
2026-07-19 TAP832 - Jul 19, 08:25 UTCJul 19, 10:50 UTC2h 25m
2026-07-19 TAP9004 - Jul 19, 02:55 UTCJul 19, 06:00 UTC3h 5m
2026-07-18 TAP9003 LIS → DJE Jul 18, 22:50 UTCJul 19, 01:40 UTC2h 50m
2026-07-18 TAP563 HAM → LIS Jul 18, 15:35 UTCJul 18, 18:50 UTC3h 15m
2026-07-18 TAP2HM LIS → HAM Jul 18, 11:25 UTCJul 18, 14:10 UTC2h 45m
2026-07-17 TAP1826 LIS → LIS Jul 17, 20:50 UTCJul 18, 09:40 UTC12h 51m
2026-07-17 TAP825 MXP → LIS Jul 17, 16:00 UTCJul 17, 18:29 UTC2h 30m
2026-07-17 TAP824 LIS → MXP Jul 17, 12:10 UTCJul 17, 14:20 UTC2h 10m
2026-07-17 TAP1023 MAD → LIS Jul 17, 06:00 UTCJul 17, 07:00 UTC1h 0m
2026-07-16 TAP1022 - Jul 16, 21:25 UTCJul 16, 22:15 UTC50m
2026-07-16 TAP93ZS ZRH → LIS Jul 16, 16:55 UTCJul 16, 19:50 UTC2h 55m
2026-07-16 TAP932 LIS → ZRH Jul 16, 13:45 UTCJul 16, 15:49 UTC2h 5m
2026-07-16 TAP9ML MXP → LIS Jul 16, 04:25 UTCJul 16, 07:15 UTC2h 50m
2026-07-15 TAP826 LIS → MXP Jul 15, 15:35 UTCJul 15, 17:50 UTC2h 15m
2026-07-15 TAP143P - Jul 15, 11:00 UTCJul 15, 11:55 UTC55m
2026-07-15 TAP1436 - Jul 15, 08:55 UTCJul 15, 10:00 UTC1h 5m
2026-07-14 TAP127M VIE → LIS Jul 14, 18:25 UTCJul 14, 21:50 UTC3h 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-TNR page for operator, model, and routing details .

Mode-S 4951D2 frequently asked

What is Mode-S code 4951D2?
4951D2 is an ICAO 24-bit transponder address. Allocated to Portugal. Assigned to CS-TNR.
Where is Mode-S 4951D2 registered?
Mode-S code 4951D2 is allocated to Portugal (PT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4951D2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4951D2, octal 22250722, decimal 4,805,074.
What flights does 4951D2 operate?
Mode-S 4951D2 has broadcast 20 distinct callsigns, including TAP1329, TAP1328, TAP1920, TAP35MT, TAP1705.