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 6h ago
Flights observed
467
Distinct callsigns
20
Country
PT
Last broadcast
6h ago

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
TAP1908 - 7 2026-07-14
TAP1706 - 7 2026-07-11
TAP83RS - 6 2026-07-13
TAP832 - 6 2026-07-13
TAP827V - 6 2026-07-12
TAP826 - 6 2026-07-12
TAP641 - 6 2026-07-12
TAP640 - 6 2026-07-12
TAP43RY TAP Portugal 6 2026-04-29
TAP43PA - 6 2026-07-01
TAP43JD - 6 2026-07-01
TAP438T TAP Portugal 6 2026-04-29
TAP1925 TAP Portugal 6 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 TAP127M VIE → LIS Jul 14, 18:25 UTCJul 14, 21:50 UTC3h 25m
2026-07-14 TAP1272 LIS → VIE Jul 14, 14:15 UTCJul 14, 17:10 UTC2h 55m
2026-07-14 TAP1923 OPO → LIS Jul 14, 09:05 UTCJul 14, 10:10 UTC1h 5m
2026-07-14 TAP1922 LIS → OPO Jul 14, 07:20 UTCJul 14, 07:45 UTC25m
2026-07-14 TAP1908 FAO → LIS Jul 14, 05:15 UTCJul 14, 05:50 UTC35m
2026-07-13 TAP1907 LIS → FAO Jul 13, 22:20 UTCJul 13, 22:50 UTC30m
2026-07-13 TAP37CN BCN → LIS Jul 13, 19:15 UTCJul 13, 20:55 UTC1h 40m
2026-07-13 TAP1036 LIS → BCN Jul 13, 16:30 UTCJul 13, 18:00 UTC1h 30m
2026-07-13 TAP83RS - Jul 13, 12:25 UTCJul 13, 15:00 UTC2h 35m
2026-07-13 TAP832 - Jul 13, 08:10 UTCJul 13, 10:40 UTC2h 30m
2026-07-13 TAP98CX - Jul 13, 05:31 UTCJul 13, 06:20 UTC50m
2026-07-12 TAP97LS - Jul 12, 23:10 UTCJul 12, 23:55 UTC45m
2026-07-12 TAP827V MXP → LIS Jul 12, 18:55 UTCJul 12, 21:25 UTC2h 30m
2026-07-12 TAP826 LIS → MXP Jul 12, 15:20 UTCJul 12, 17:35 UTC2h 15m
2026-07-12 TAP641 BRU → LIS Jul 12, 10:15 UTCJul 12, 12:45 UTC2h 30m
2026-07-12 TAP640 LIS → BRU Jul 12, 06:40 UTCJul 12, 08:55 UTC2h 15m
2026-07-12 TAP1937 OPO → LIS Jul 12, 04:15 UTCJul 12, 04:50 UTC35m
2026-07-11 TAP1706 FNC → OPO Jul 11, 23:30 UTCJul 12, 01:10 UTC1h 40m
2026-07-11 TAP1705 OPO → FNC Jul 11, 21:00 UTCJul 11, 22:45 UTC1h 45m
2026-07-11 TAP939 GVA → OPO Jul 11, 17:45 UTCJul 11, 19:45 UTC2h 0m
2026-07-11 TAP938 OPO → GVA Jul 11, 14:45 UTCJul 11, 16:35 UTC1h 50m
2026-07-11 TAP1329 LGW → OPO Jul 11, 11:20 UTCJul 11, 13:20 UTC2h 0m
2026-07-11 TAP1328 OPO → LGW Jul 11, 08:10 UTCJul 11, 09:55 UTC1h 45m
2026-07-11 TAP1920 LIS → OPO Jul 11, 06:15 UTCJul 11, 06:50 UTC35m
2026-07-11 TAP1937 OPO → LIS Jul 11, 04:15 UTCJul 11, 04:55 UTC40m
2026-07-10 TAP1708 FNC → OPO Jul 10, 21:45 UTCJul 10, 23:20 UTC1h 35m
2026-07-10 TAP1705 - Jul 10, 20:40 UTCJul 10, 20:50 UTC10m
2026-07-10 TAP1705 - Jul 10, 19:00 UTCJul 10, 20:05 UTC1h 5m
2026-07-10 TAP921 ZRH → OPO Jul 10, 14:10 UTCJul 10, 16:45 UTC2h 35m
2026-07-10 TAP920 OPO → ZRH Jul 10, 10:30 UTCJul 10, 12:45 UTC2h 15m
2026-07-10 TAP1702 FNC → OPO Jul 10, 07:35 UTCJul 10, 09:15 UTC1h 40m
2026-07-10 TAP1701 - Jul 10, 06:30 UTCJul 10, 06:40 UTC10m
2026-07-10 TAP1701 - Jul 10, 04:55 UTCJul 10, 05:50 UTC55m
2026-07-09 TAP1706 - Jul 9, 22:25 UTCJul 9, 23:20 UTC55m
2026-07-09 TAP1706 - Jul 9, 21:45 UTCJul 9, 21:55 UTC10m
2026-07-09 TAP1705 - Jul 9, 20:30 UTCJul 9, 20:40 UTC10m
2026-07-09 TAP1705 - Jul 9, 19:00 UTCJul 9, 19:55 UTC55m
2026-07-09 TAP5RP ORY → OPO Jul 9, 15:35 UTCJul 9, 17:25 UTC1h 50m
2026-07-09 TAP454 OPO → ORY Jul 9, 12:40 UTCJul 9, 14:25 UTC1h 45m
2026-07-09 TAP453 ORY → OPO Jul 9, 08:05 UTCJul 9, 09:55 UTC1h 50m
2026-07-09 TAP452 OPO → ORY Jul 9, 05:15 UTCJul 9, 07:05 UTC1h 50m
2026-07-08 TAP31TY LGW → OPO Jul 8, 20:40 UTCJul 8, 22:30 UTC1h 50m
2026-07-08 TAP1330 OPO → LGW Jul 8, 17:45 UTCJul 8, 19:30 UTC1h 45m
2026-07-08 TAP939 GVA → OPO Jul 8, 14:25 UTCJul 8, 16:30 UTC2h 5m
2026-07-08 TAP938 OPO → GVA Jul 8, 11:05 UTCJul 8, 13:00 UTC1h 55m
2026-07-08 TAP453 ORY → OPO Jul 8, 08:05 UTCJul 8, 10:05 UTC2h 0m
2026-07-08 TAP452 OPO → ORY Jul 8, 05:10 UTCJul 8, 07:05 UTC1h 55m
2026-07-07 TAP31TY LGW → OPO Jul 7, 20:55 UTCJul 7, 22:45 UTC1h 50m
2026-07-07 TAP1330 OPO → LGW Jul 7, 17:55 UTCJul 7, 19:40 UTC1h 45m
2026-07-07 TAP939 GVA → OPO Jul 7, 14:50 UTCJul 7, 16:45 UTC1h 55m

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 6h ago.
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.