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sensors Mode-S transponder

491D8C

ICAO 24-bit transponder address · allocated to Portugal

Currently assigned to CS-GLL · BOMBARDIER BD-700 Global 6000/6500

Hex
491D8C
Octal
22216614
Decimal
4,791,692
Country
PT
Tail
CS-GLL
Type
GLEX
No current signal · last broadcast 6h ago
Flights observed
119
Distinct callsigns
20
Country
PT
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 491D8C.

Country allocation

The ICAO 24-bit address 491D8C 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
NJE4LL - 8 2026-07-04
NJE690Y - 6 2026-04-15
NJE913D - 5 2026-06-24
NJE481H - 5 2026-05-16
NJE806A - 4 2026-04-30
NJE082A - 4 2026-05-30
NJE813V - 3 2026-07-12
NJE632L - 2 2026-07-17
NJE541T - 2 2026-04-23
NJE408D - 2 2026-06-14
NJE224V - 2 2026-04-17
NJE049W - 2 2026-04-16
NJU229T - 1 2026-07-04
NJU037T - 1 2026-04-21
NJE989D - 1 2026-07-06
NJE963R - 1 2026-06-20
NJE962Q - 1 2026-05-31
NJE959C - 1 2026-05-09
NJE951A - 1 2026-05-03
NJE920R - 1 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 NJE367M DUB → LTN Jul 17, 18:19 UTCJul 17, 19:15 UTC55m
2026-07-17 NJE632L - Jul 17, 07:30 UTCJul 17, 07:55 UTC25m
2026-07-17 NJE632L - Jul 17, 07:00 UTCJul 17, 07:25 UTC25m
2026-07-16 NJE784V - Jul 16, 10:35 UTCJul 16, 10:55 UTC20m
2026-07-15 NJE920R CGN → STN Jul 15, 08:45 UTCJul 15, 09:45 UTC1h 0m
2026-07-14 NJE618Q - Jul 14, 11:55 UTCJul 14, 12:45 UTC50m
2026-07-14 NJE075C - Jul 14, 10:00 UTCJul 14, 10:55 UTC55m
2026-07-12 NJE813V - Jul 12, 06:55 UTCJul 12, 15:25 UTC8h 30m
2026-07-12 NJE813V - Jul 12, 01:45 UTCJul 12, 04:30 UTC2h 45m
2026-07-10 NJE813V - Jul 10, 10:15 UTCJul 10, 21:05 UTC10h 51m
2026-07-09 NJE744P - Jul 9, 12:00 UTCJul 9, 13:15 UTC1h 15m
2026-07-08 NJE838D - Jul 8, 08:35 UTCJul 8, 10:10 UTC1h 35m
2026-07-08 NJE675G LIN → TLN Jul 8, 06:20 UTCJul 8, 07:10 UTC50m
2026-07-07 NJE425E - Jul 7, 14:25 UTCJul 7, 15:20 UTC55m
2026-07-07 NJE779V - Jul 7, 10:30 UTCJul 7, 12:55 UTC2h 25m
2026-07-07 NJE348F BRN → CAT Jul 7, 06:15 UTCJul 7, 08:25 UTC2h 10m
2026-07-06 NJE989D - Jul 6, 14:35 UTCJul 6, 16:05 UTC1h 30m
2026-07-06 NJE537Y - Jul 6, 12:00 UTCJul 6, 13:15 UTC1h 15m
2026-07-06 NJE913C - Jul 6, 09:55 UTCJul 6, 10:35 UTC40m
2026-07-06 NJE537G - Jul 6, 07:05 UTCJul 6, 08:30 UTC1h 25m
2026-07-05 NJE034Y - Jul 5, 07:35 UTCJul 5, 09:50 UTC2h 15m
2026-07-04 NJE4LL - Jul 4, 13:40 UTCJul 4, 14:35 UTC55m
2026-07-04 NJU229T - Jul 4, 11:15 UTCJul 4, 12:30 UTC1h 15m
2026-07-04 NJE270E - Jul 4, 06:55 UTCJul 4, 08:50 UTC1h 55m
2026-07-03 NJE811V - Jul 3, 15:45 UTCJul 3, 16:15 UTC30m
2026-07-03 NJE635F LBG → IBZ Jul 3, 13:00 UTCJul 3, 14:35 UTC1h 35m
2026-06-30 NJE4LL - Jun 30, 09:10 UTCJun 30, 10:55 UTC1h 45m
2026-06-29 NJE4LL RTM → BUD Jun 29, 11:20 UTCJun 29, 13:00 UTC1h 40m
2026-06-28 NJE4LL AUS → RTM Jun 28, 22:20 UTCJun 29, 07:25 UTC9h 5m
2026-06-28 NJE4LL - Jun 28, 17:19 UTCJun 28, 20:29 UTC3h 10m
2026-06-26 NJE541Y - Jun 26, 13:10 UTCJun 26, 20:04 UTC6h 55m
2026-06-25 NJE116Y - Jun 25, 15:40 UTCJun 25, 16:05 UTC25m
2026-06-25 NJE455Q MLA → NHT Jun 25, 12:04 UTCJun 25, 14:50 UTC2h 45m
2026-06-24 NJE913D - Jun 24, 16:24 UTCJun 24, 18:20 UTC1h 55m
2026-06-23 NJE913D - Jun 23, 20:04 UTCJun 23, 21:59 UTC1h 55m
2026-06-23 NJE913D - Jun 23, 10:39 UTCJun 23, 18:50 UTC8h 10m
2026-06-21 NJE913D - Jun 21, 20:34 UTCJun 22, 04:15 UTC7h 40m
2026-06-21 NJE913D - Jun 21, 15:34 UTCJun 21, 19:05 UTC3h 30m
2026-06-20 NJE963R - Jun 20, 15:04 UTCJun 20, 16:59 UTC1h 55m
2026-06-20 NJE014P - Jun 20, 12:54 UTCJun 20, 13:55 UTC1h 0m
2026-06-20 NJE812D - Jun 20, 08:19 UTCJun 20, 09:44 UTC1h 25m
2026-06-19 NJE715F - Jun 19, 14:34 UTCJun 19, 16:25 UTC1h 50m
2026-06-19 NJE149D - Jun 19, 12:09 UTCJun 19, 13:09 UTC1h 0m
2026-06-18 NJE4LL - Jun 18, 15:40 UTCJun 18, 16:30 UTC50m
2026-06-18 NJE072F - Jun 18, 12:25 UTCJun 18, 14:15 UTC1h 50m
2026-06-18 NJE450A - Jun 18, 09:00 UTCJun 18, 10:40 UTC1h 40m
2026-06-17 NJE809M - Jun 17, 15:10 UTCJun 17, 16:40 UTC1h 30m
2026-06-17 NJE744R - Jun 17, 10:45 UTCJun 17, 12:35 UTC1h 50m
2026-06-16 NJE458W VIP → NHT Jun 16, 07:09 UTCJun 16, 08:25 UTC1h 15m
2026-06-15 NJE074G - Jun 15, 14:34 UTCJun 15, 15:25 UTC50m

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

Mode-S 491D8C frequently asked

What is Mode-S code 491D8C?
491D8C is an ICAO 24-bit transponder address. Allocated to Portugal. Assigned to CS-GLL.
Where is Mode-S 491D8C registered?
Mode-S code 491D8C is allocated to Portugal (PT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 491D8C 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 491D8C, octal 22216614, decimal 4,791,692.
What flights does 491D8C operate?
Mode-S 491D8C has broadcast 20 distinct callsigns, including NJE4LL, NJE690Y, NJE913D, NJE481H, NJE806A.