Apparatus

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sensors Mode-S transponder

4951CB

ICAO 24-bit transponder address · allocated to Portugal

Currently assigned to CS-TNK · AIRBUS A-320

Hex
4951CB
Octal
22250713
Decimal
4,805,067
Country
PT
Tail
CS-TNK
Type
A320
No current signal · last broadcast 27d ago
Flights observed
324
Distinct callsigns
20
Country
PT
Last broadcast
27d ago

Last known position

Most recent position reported by Mode-S 4951CB.

Country allocation

The ICAO 24-bit address 4951CB 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 12 2026-05-28
TAP1702 TAP Portugal 8 2026-05-28
TAP1705 TAP Portugal 6 2026-05-30
TAP831 TAP Portugal 5 2026-05-24
TAP830 TAP Portugal 5 2026-05-24
TAP824 TAP Portugal 5 2026-05-31
TAP647 - 5 2026-06-13
TAP641 TAP Portugal 5 2026-06-15
TAP640 - 5 2026-06-15
TAP46RU TAP Portugal 5 2026-06-12
TAP8RL TAP Portugal 4 2026-05-16
TAP838Z TAP Portugal 4 2026-05-15
TAP828 TAP Portugal 4 2026-05-24
TAP825 TAP Portugal 4 2026-05-31
TAP56DP TAP Portugal 4 2026-04-17
TAP31TY TAP Portugal 4 2026-05-28
TAP1937 TAP Portugal 4 2026-05-19
TAP1685 TAP Portugal 4 2026-04-22
TAP15NC TAP Portugal 4 2026-05-20
TAP14NC - 4 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-16 TAP435 ORY → LIS Jun 16, 15:05 UTCJun 16, 17:10 UTC2h 5m
2026-06-16 TAP43TR LIS → ORY Jun 16, 11:45 UTCJun 16, 14:00 UTC2h 15m
2026-06-16 TAP11WQ MAD → LIS Jun 16, 09:25 UTCJun 16, 10:20 UTC55m
2026-06-16 TAP10MD - Jun 16, 07:05 UTCJun 16, 08:05 UTC1h 0m
2026-06-15 TAP555 MUC → LIS Jun 15, 18:50 UTCJun 15, 21:35 UTC2h 45m
2026-06-15 TAP554M LIS → MUC Jun 15, 14:50 UTCJun 15, 17:40 UTC2h 50m
2026-06-15 TAP641 BRU → LIS Jun 15, 10:55 UTCJun 15, 13:20 UTC2h 25m
2026-06-15 TAP640 LIS → BRU Jun 15, 06:40 UTCJun 15, 09:05 UTC2h 25m
2026-06-14 TAP5AS FRA → LIS Jun 14, 18:15 UTCJun 14, 21:05 UTC2h 50m
2026-06-14 TAP72LP LIS → FRA Jun 14, 14:05 UTCJun 14, 16:45 UTC2h 40m
2026-06-14 TAP43JD ORY → LIS Jun 14, 10:30 UTCJun 14, 12:40 UTC2h 10m
2026-06-14 TAP43PA LIS → ORY Jun 14, 07:15 UTCJun 14, 09:25 UTC2h 10m
2026-06-13 TAP437X ORY → LIS Jun 13, 19:00 UTCJun 13, 21:15 UTC2h 15m
2026-06-13 TAP436 LIS → ORY Jun 13, 15:30 UTCJun 13, 17:35 UTC2h 5m
2026-06-13 TAP941 GVA → LIS Jun 13, 11:55 UTCJun 13, 14:05 UTC2h 10m
2026-06-13 TAP40GV LIS → GVA Jun 13, 08:30 UTCJun 13, 10:35 UTC2h 5m
2026-06-13 TAP647 - Jun 13, 04:25 UTCJun 13, 06:55 UTC2h 30m
2026-06-12 TAP46RU LIS → BRU Jun 12, 19:25 UTCJun 12, 21:45 UTC2h 20m
2026-06-12 TAP56DT HAM → LIS Jun 12, 14:05 UTCJun 12, 17:15 UTC3h 10m
2026-06-12 TAP560 LIS → HAM Jun 12, 08:30 UTCJun 12, 11:20 UTC2h 50m
2026-06-12 TAP9012 - Jun 12, 03:45 UTCJun 12, 04:55 UTC1h 10m
2026-06-11 TAP9011 - Jun 11, 22:55 UTCJun 12, 00:35 UTC1h 41m
2026-06-11 TAP885 NAP → LIS Jun 11, 18:10 UTCJun 11, 20:55 UTC2h 45m
2026-06-11 TAP884 LIS → ATH Jun 11, 14:00 UTCJun 11, 16:45 UTC2h 45m
2026-06-11 TAP647 BRU → LIS Jun 11, 04:35 UTCJun 11, 06:55 UTC2h 20m
2026-06-10 TAP46RU LIS → BRU Jun 10, 19:50 UTCJun 10, 22:25 UTC2h 35m
2026-06-10 TAP1931 OPO → LIS Jun 10, 17:55 UTCJun 10, 18:30 UTC35m
2026-06-10 TAP3960 LIS → OPO Jun 10, 16:15 UTCJun 10, 16:45 UTC30m
2026-06-10 TAP83RS FCO → LIS Jun 10, 11:55 UTCJun 10, 14:40 UTC2h 45m
2026-06-10 TAP832 LIS → FCO Jun 10, 08:00 UTCJun 10, 10:25 UTC2h 25m
2026-06-09 TAP437X ORY → LIS Jun 9, 17:50 UTCJun 9, 20:05 UTC2h 15m
2026-06-09 TAP436 LIS → ORY Jun 9, 14:35 UTCJun 9, 15:50 UTC1h 15m
2026-06-09 TAP823 MXP → LIS Jun 9, 10:45 UTCJun 9, 13:15 UTC2h 30m
2026-06-09 TAP22MX LIS → MXP Jun 9, 06:45 UTCJun 9, 09:00 UTC2h 15m
2026-06-08 TAP1143 IBZ → LIS Jun 8, 19:50 UTCJun 8, 21:35 UTC1h 45m
2026-06-08 TAP1142 LIS → IBZ Jun 8, 16:35 UTCJun 8, 17:50 UTC1h 15m
2026-06-08 TAP571 FRA → LIS Jun 8, 12:05 UTCJun 8, 15:04 UTC3h 0m
2026-06-08 TAP7AB LIS → FRA Jun 8, 07:50 UTCJun 8, 10:35 UTC2h 45m
2026-06-08 TAP96AW FNC → LIS Jun 8, 03:40 UTCJun 8, 05:05 UTC1h 25m
2026-06-07 TAP97LS LIS → FNC Jun 7, 23:05 UTCJun 8, 00:35 UTC1h 30m
2026-06-07 TAP555 MUC → LIS Jun 7, 18:10 UTCJun 7, 21:05 UTC2h 55m
2026-06-07 TAP554M LIS → MUC Jun 7, 14:25 UTCJun 7, 17:10 UTC2h 45m
2026-06-07 TAP641 BRU → LIS Jun 7, 10:25 UTCJun 7, 13:00 UTC2h 35m
2026-06-07 TAP640 LIS → BRU Jun 7, 06:35 UTCJun 7, 09:00 UTC2h 25m
2026-06-06 TAP1692 FNC → LIS Jun 6, 18:45 UTCJun 6, 20:05 UTC1h 20m
2026-06-06 TAP91SR LIS → FNC Jun 6, 16:10 UTCJun 6, 17:40 UTC1h 30m
2026-06-06 TAP641 BRU → LIS Jun 6, 10:30 UTCJun 6, 13:09 UTC2h 40m
2026-06-06 TAP640 LIS → BRU Jun 6, 07:10 UTCJun 6, 09:19 UTC2h 10m
2026-06-06 TAP96AW FNC → LIS Jun 6, 03:40 UTCJun 6, 05:05 UTC1h 25m
2026-06-05 TAP16LN LIS → FNC Jun 5, 22:20 UTCJun 5, 23:50 UTC1h 30m

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

Mode-S 4951CB frequently asked

What is Mode-S code 4951CB?
4951CB is an ICAO 24-bit transponder address. Allocated to Portugal. Assigned to CS-TNK.
Where is Mode-S 4951CB registered?
Mode-S code 4951CB is allocated to Portugal (PT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4951CB broadcasting right now?
No active broadcast right now. Last signal was 27d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4951CB, octal 22250713, decimal 4,805,067.
What flights does 4951CB operate?
Mode-S 4951CB has broadcast 20 distinct callsigns, including TAP1701, TAP1702, TAP1705, TAP831, TAP830.