Apparatus

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sensors Mode-S transponder

4951D8

ICAO 24-bit transponder address · allocated to Portugal

Currently assigned to CS-TNX · AIRBUS A-320

Hex
4951D8
Octal
22250730
Decimal
4,805,080
Country
PT
Tail
CS-TNX
Type
A320
No current signal · last broadcast 7h ago
Flights observed
368
Distinct callsigns
20
Country
PT
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 4951D8.

Country allocation

The ICAO 24-bit address 4951D8 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
TAP35MT - 6 2026-07-09
TAP1329 - 6 2026-07-09
TAP1328 - 6 2026-07-09
TAP9RH - 5 2026-06-26
TAP96AW TAP Portugal 5 2026-05-12
TAP93ZR - 5 2026-07-12
TAP934 - 5 2026-06-25
TAP931L - 5 2026-07-12
TAP1920 - 5 2026-07-10
TAP939 - 4 2026-07-09
TAP938 - 4 2026-07-09
TAP91SR TAP Portugal 4 2026-05-13
TAP825 - 4 2026-07-13
TAP824 - 4 2026-07-13
TAP72LP - 4 2026-06-30
TAP31TY - 4 2026-06-18
TAP1922 - 4 2026-06-19
TAP1705 TAP Portugal 4 2026-06-10
TAP1330 - 4 2026-06-18
TAP11WQ TAP Portugal 4 2026-05-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 TAP825 MXP → LIS Jul 13, 17:50 UTCJul 13, 20:25 UTC2h 35m
2026-07-13 TAP824 LIS → MXP Jul 13, 13:55 UTCJul 13, 16:05 UTC2h 10m
2026-07-13 TAP575 FRA → LIS Jul 13, 04:25 UTCJul 13, 07:20 UTC2h 55m
2026-07-12 TAP57LK - Jul 12, 17:55 UTCJul 12, 20:15 UTC2h 20m
2026-07-12 TAP931L ZRH → LIS Jul 12, 12:40 UTCJul 12, 15:30 UTC2h 50m
2026-07-12 TAP93ZR LIS → ZRH Jul 12, 08:20 UTCJul 12, 10:40 UTC2h 20m
2026-07-12 TAP9004 - Jul 12, 03:05 UTCJul 12, 06:10 UTC3h 5m
2026-07-11 TAP9003 LIS → DJE Jul 11, 23:00 UTCJul 12, 01:50 UTC2h 50m
2026-07-11 TAP825 MXP → LIS Jul 11, 17:45 UTCJul 11, 20:15 UTC2h 30m
2026-07-11 TAP824 LIS → MXP Jul 11, 13:00 UTCJul 11, 15:30 UTC2h 30m
2026-07-11 TAP1902 FAO → LIS Jul 11, 10:40 UTCJul 11, 11:10 UTC30m
2026-07-11 TAP1901 LIS → FAO Jul 11, 09:00 UTCJul 11, 09:35 UTC35m
2026-07-11 TAP56DP - Jul 11, 04:30 UTCJul 11, 07:35 UTC3h 5m
2026-07-10 TAP564C LIS → HAM Jul 10, 17:05 UTCJul 10, 20:00 UTC2h 55m
2026-07-10 TAP90EH FNC → LIS Jul 10, 13:35 UTCJul 10, 15:00 UTC1h 25m
2026-07-10 TAP89WT - Jul 10, 12:15 UTCJul 10, 12:25 UTC10m
2026-07-10 TAP89WT - Jul 10, 10:55 UTCJul 10, 11:40 UTC45m
2026-07-10 TAP1921 OPO → LIS Jul 10, 08:15 UTCJul 10, 09:00 UTC45m
2026-07-10 TAP1920 LIS → OPO Jul 10, 06:30 UTCJul 10, 07:05 UTC35m
2026-07-09 TAP35MT OPO → LIS Jul 9, 21:45 UTCJul 9, 22:30 UTC45m
2026-07-09 TAP939 GVA → OPO Jul 9, 18:05 UTCJul 9, 20:05 UTC2h 0m
2026-07-09 TAP938 OPO → GVA Jul 9, 15:00 UTCJul 9, 16:55 UTC1h 55m
2026-07-09 TAP1329 - Jul 9, 11:50 UTCJul 9, 13:45 UTC1h 55m
2026-07-09 TAP1328 OPO → LGW Jul 9, 08:45 UTCJul 9, 10:40 UTC1h 55m
2026-07-09 TAP1920 LIS → OPO Jul 9, 07:00 UTCJul 9, 07:35 UTC35m
2026-07-08 TAP94KM FNC → LIS Jul 8, 21:50 UTCJul 8, 23:10 UTC1h 20m
2026-07-08 TAP93MA LIS → FNC Jul 8, 19:15 UTCJul 8, 20:45 UTC1h 30m
2026-07-08 TAP435 ORY → LIS Jul 8, 15:20 UTCJul 8, 17:40 UTC2h 20m
2026-07-08 TAP43TR LIS → ORY Jul 8, 12:00 UTCJul 8, 14:00 UTC2h 0m
2026-07-07 TAP863Y VCE → LIS Jul 7, 19:00 UTCJul 7, 21:40 UTC2h 40m
2026-07-07 TAP86VR LIS → VCE Jul 7, 14:55 UTCJul 7, 17:40 UTC2h 45m
2026-07-07 TAP831 - Jul 7, 09:40 UTCJul 7, 12:15 UTC2h 35m
2026-07-07 TAP830 - Jul 7, 05:45 UTCJul 7, 08:10 UTC2h 25m
2026-07-06 TAP645 - Jul 6, 20:05 UTCJul 6, 22:30 UTC2h 25m
2026-07-06 TAP44BR LIS → BRU Jul 6, 16:20 UTCJul 6, 18:45 UTC2h 25m
2026-07-06 TAP931L ZRH → LIS Jul 6, 12:15 UTCJul 6, 14:50 UTC2h 35m
2026-07-06 TAP93ZR LIS → ZRH Jul 6, 08:05 UTCJul 6, 10:40 UTC2h 35m
2026-07-06 TAP41SN BCN → LIS Jul 6, 04:05 UTCJul 6, 05:35 UTC1h 30m
2026-07-05 TAP1040 LIS → BCN Jul 5, 22:20 UTCJul 5, 23:45 UTC1h 25m
2026-07-05 TAP825 MXP → LIS Jul 5, 18:00 UTCJul 5, 20:30 UTC2h 30m
2026-07-05 TAP824 LIS → MXP Jul 5, 14:20 UTCJul 5, 16:35 UTC2h 15m
2026-07-05 TAP647 - Jul 5, 04:15 UTCJul 5, 06:35 UTC2h 20m
2026-07-04 TAP46RU LIS → BRU Jul 4, 20:30 UTCJul 4, 23:00 UTC2h 30m
2026-07-04 TAP94VA - Jul 4, 16:55 UTCJul 4, 19:15 UTC2h 20m
2026-07-04 TAP42LV LIS → GVA Jul 4, 13:35 UTCJul 4, 15:35 UTC2h 0m
2026-07-04 TAP27PS OPO → LIS Jul 4, 11:10 UTCJul 4, 11:50 UTC40m
2026-07-04 TAP1926 LIS → OPO Jul 4, 09:05 UTCJul 4, 09:40 UTC35m
2026-07-04 TAP901 ATH → LIS Jul 4, 03:05 UTCJul 4, 07:05 UTC4h 0m
2026-07-03 TAP900 LIS → ATH Jul 3, 20:50 UTCJul 4, 00:30 UTC3h 40m
2026-07-03 TAP69UX LUX → LIS Jul 3, 16:15 UTCJul 3, 18:55 UTC2h 40m

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

Mode-S 4951D8 frequently asked

What is Mode-S code 4951D8?
4951D8 is an ICAO 24-bit transponder address. Allocated to Portugal. Assigned to CS-TNX.
Where is Mode-S 4951D8 registered?
Mode-S code 4951D8 is allocated to Portugal (PT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4951D8 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4951D8, octal 22250730, decimal 4,805,080.
What flights does 4951D8 operate?
Mode-S 4951D8 has broadcast 20 distinct callsigns, including TAP35MT, TAP1329, TAP1328, TAP9RH, TAP96AW.