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sensors Mode-S transponder

491D9A

ICAO 24-bit transponder address · allocated to Portugal

Currently assigned to CS-GLZ · BOMBARDIER BD-700 Global 5000/5500

Hex
491D9A
Octal
22216632
Decimal
4,791,706
Country
PT
Tail
CS-GLZ
Type
GL5T
No current signal · last broadcast 9h ago
Flights observed
102
Distinct callsigns
20
Country
PT
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 491D9A.

Country allocation

The ICAO 24-bit address 491D9A 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
NJE3HA - 10 2026-07-17
NJE838H - 3 2026-07-02
NJE633A - 2 2026-06-28
NJE521W - 2 2026-07-12
NJE302Y - 2 2026-04-25
NJE128N - 2 2026-04-16
NJE117E - 2 2026-04-16
NJE049V - 2 2026-04-17
NJU969D - 1 2026-06-22
NJU478L - 1 2026-06-01
NJU131C - 1 2026-07-02
NJU018E - 1 2026-05-22
NJE996B - 1 2026-06-11
NJE978F - 1 2026-06-11
NJE977E - 1 2026-07-03
NJE968L - 1 2026-07-15
NJE952R - 1 2026-04-13
NJE894C - 1 2026-06-12
NJE884H - 1 2026-06-05
NJE881H - 1 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 NJE3HA - Jul 17, 19:09 UTCJul 17, 19:55 UTC45m
2026-07-15 NJE3HA - Jul 15, 23:30 UTCJul 15, 23:55 UTC25m
2026-07-15 NJE968L - Jul 15, 18:15 UTCJul 15, 21:40 UTC3h 25m
2026-07-13 NJE022M - Jul 13, 12:10 UTCJul 13, 13:10 UTC1h 0m
2026-07-12 NJE521W - Jul 12, 14:40 UTCJul 12, 16:50 UTC2h 10m
2026-07-12 NJE227V - Jul 12, 11:20 UTCJul 12, 13:10 UTC1h 50m
2026-07-12 NJE128Q BCN → ACH Jul 12, 08:20 UTCJul 12, 09:40 UTC1h 20m
2026-07-11 NJE253W GVA → BCN Jul 11, 14:40 UTCJul 11, 15:50 UTC1h 10m
2026-07-11 NJE214H MXP → GVA Jul 11, 12:50 UTCJul 11, 13:25 UTC35m
2026-07-11 NJE230W - Jul 11, 08:55 UTCJul 11, 11:00 UTC2h 5m
2026-07-10 NJE129P MUC → BMA Jul 10, 16:05 UTCJul 10, 17:55 UTC1h 50m
2026-07-10 NJE772F MXP → MUC Jul 10, 14:00 UTCJul 10, 14:45 UTC45m
2026-07-10 NJE632N TLN → MXP Jul 10, 11:05 UTCJul 10, 11:50 UTC45m
2026-07-10 NJE059U - Jul 10, 07:35 UTCJul 10, 09:15 UTC1h 40m
2026-07-09 NJE513R LCY → FAB Jul 9, 15:45 UTCJul 9, 16:10 UTC25m
2026-07-09 NJE691V ZRH → LCY Jul 9, 13:25 UTCJul 9, 14:35 UTC1h 10m
2026-07-09 NJE843K MAD → ZRH Jul 9, 06:25 UTCJul 9, 08:00 UTC1h 35m
2026-07-08 NJE019T - Jul 8, 13:10 UTCJul 8, 14:35 UTC1h 25m
2026-07-08 NJE397Q IBZ → NCE Jul 8, 10:40 UTCJul 8, 11:50 UTC1h 10m
2026-07-08 NJE106H MAD → IBZ Jul 8, 08:55 UTCJul 8, 09:45 UTC50m
2026-07-07 NJE582Q - Jul 7, 12:35 UTCJul 7, 14:00 UTC1h 25m
2026-07-07 NJE015G - Jul 7, 08:10 UTCJul 7, 08:55 UTC45m
2026-07-06 NJE399A - Jul 6, 16:25 UTCJul 6, 17:35 UTC1h 10m
2026-07-03 NJE468C CGN → FAB Jul 3, 19:20 UTCJul 3, 20:20 UTC1h 0m
2026-07-03 NJE977E BCN → CGN Jul 3, 16:20 UTCJul 3, 18:05 UTC1h 45m
2026-07-03 NJE337F - Jul 3, 09:55 UTCJul 3, 10:55 UTC1h 0m
2026-07-02 NJU131C FAB → GVA Jul 2, 16:00 UTCJul 2, 17:10 UTC1h 10m
2026-07-02 NJE838H - Jul 2, 13:35 UTCJul 2, 14:15 UTC40m
2026-07-02 NJE838H - Jul 2, 08:50 UTCJul 2, 12:00 UTC3h 10m
2026-07-01 NJE838H - Jul 1, 12:10 UTCJul 1, 14:25 UTC2h 15m
2026-06-30 NJE808R VCE → LIN Jun 30, 19:20 UTCJun 30, 20:00 UTC40m
2026-06-30 NJE069Q - Jun 30, 11:35 UTCJun 30, 18:35 UTC7h 0m
2026-06-29 NJE3HA - Jun 29, 20:24 UTCJun 29, 21:09 UTC45m
2026-06-28 NJE633A YUL → TEB Jun 28, 16:00 UTCJun 28, 17:00 UTC1h 0m
2026-06-28 NJE633A IAD → YUL Jun 28, 13:10 UTCJun 28, 14:19 UTC1h 10m
2026-06-24 NJE186T EWR → IAD Jun 24, 10:30 UTCJun 24, 15:59 UTC5h 30m
2026-06-22 NJU969D - Jun 22, 10:55 UTCJun 22, 18:19 UTC7h 25m
2026-06-21 NJE371T - Jun 21, 15:54 UTCJun 21, 18:29 UTC2h 35m
2026-06-21 NJE551B - Jun 21, 11:40 UTCJun 21, 12:10 UTC30m
2026-06-20 NJE802C - Jun 20, 16:14 UTCJun 20, 17:34 UTC1h 20m
2026-06-20 NJE101A - Jun 20, 12:39 UTCJun 20, 14:39 UTC2h 0m
2026-06-18 NJE096Q - Jun 18, 12:45 UTCJun 18, 13:55 UTC1h 10m
2026-06-18 NJE536D - Jun 18, 08:20 UTCJun 18, 11:10 UTC2h 50m
2026-06-17 NJE680P - Jun 17, 14:40 UTCJun 17, 16:25 UTC1h 45m
2026-06-17 NJE513T BQH → NHT Jun 17, 12:40 UTCJun 17, 13:05 UTC25m
2026-06-14 NJE243M DUB → BQH Jun 14, 18:10 UTCJun 14, 19:05 UTC55m
2026-06-14 NJE546C - Jun 14, 14:15 UTCJun 14, 16:55 UTC2h 40m
2026-06-14 NJE829E PRG → BUD Jun 14, 11:10 UTCJun 14, 12:00 UTC50m
2026-06-13 NJE817Q - Jun 13, 09:40 UTCJun 13, 12:15 UTC2h 35m
2026-06-12 NJE088B - Jun 12, 13:15 UTCJun 12, 14:35 UTC1h 20m

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

Mode-S 491D9A frequently asked

What is Mode-S code 491D9A?
491D9A is an ICAO 24-bit transponder address. Allocated to Portugal. Assigned to CS-GLZ.
Where is Mode-S 491D9A registered?
Mode-S code 491D9A is allocated to Portugal (PT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 491D9A broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 491D9A, octal 22216632, decimal 4,791,706.
What flights does 491D9A operate?
Mode-S 491D9A has broadcast 20 distinct callsigns, including NJE3HA, NJE838H, NJE633A, NJE521W, NJE302Y.