sensors Mode-S transponder

491D87

ICAO 24-bit transponder address · allocated to Portugal

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

Hex
491D87
Octal
22216607
Decimal
4,791,687
Country
PT
Tail
CS-GLG
Type
GLEX
No current signal · last broadcast 8d ago
Flights observed
101
Distinct callsigns
20
Country
PT
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S 491D87.

Country allocation

The ICAO 24-bit address 491D87 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
NJE8NJ - 11 2026-07-09
NJE920E - 4 2026-06-08
NJE311P - 3 2026-07-08
NJU742A - 2 2026-04-17
NJE689N - 2 2026-05-27
NJE591K - 2 2026-04-23
NJE157G - 2 2026-06-16
NJE9UQ - 1 2026-04-20
NJE995V - 1 2026-04-24
NJE976F - 1 2026-06-26
NJE967P - 1 2026-05-14
NJE966B - 1 2026-05-19
NJE952M - 1 2026-04-24
NJE940U - 1 2026-04-25
NJE921V - 1 2026-06-28
NJE915Y - 1 2026-06-04
NJE908D - 1 2026-06-29
NJE893G - 1 2026-06-08
NJE882R - 1 2026-05-13
NJE875R - 1 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 NJE8NJ - Jul 9, 12:15 UTCJul 9, 17:40 UTC5h 25m
2026-07-09 NJE8NJ - Jul 9, 11:10 UTCJul 9, 11:20 UTC10m
2026-07-08 NJE311P - Jul 8, 19:30 UTCJul 8, 19:50 UTC20m
2026-07-08 NJE311P - Jul 8, 15:10 UTCJul 8, 19:00 UTC3h 50m
2026-07-08 NJE311P - Jul 8, 11:30 UTCJul 8, 12:25 UTC55m
2026-07-06 NJE460Y MAD → TEB Jul 6, 11:05 UTCJul 6, 18:25 UTC7h 20m
2026-07-06 NJE612K GVA → MAD Jul 6, 05:25 UTCJul 6, 06:50 UTC1h 25m
2026-07-05 NJE312C ATH → GVA Jul 5, 07:55 UTCJul 5, 10:20 UTC2h 25m
2026-07-02 NJE375Y RHO → ATH Jul 2, 19:00 UTCJul 2, 19:45 UTC45m
2026-07-02 NJE871W MAN → RHO Jul 2, 13:00 UTCJul 2, 16:35 UTC3h 35m
2026-07-02 NJE361W - Jul 2, 09:15 UTCJul 2, 09:50 UTC35m
2026-06-30 NJE194G IBZ → NHT Jun 30, 07:00 UTCJun 30, 09:10 UTC2h 10m
2026-06-29 NJE908D - Jun 29, 15:39 UTCJun 29, 17:34 UTC1h 55m
2026-06-29 NJE605L NCE → FAB Jun 29, 12:20 UTCJun 29, 13:49 UTC1h 30m
2026-06-29 NJE875R - Jun 29, 08:14 UTCJun 29, 09:54 UTC1h 40m
2026-06-28 NJE921V - Jun 28, 14:34 UTCJun 28, 16:39 UTC2h 5m
2026-06-28 NJE829L HAJ → LPI Jun 28, 12:19 UTCJun 28, 13:19 UTC1h 0m
2026-06-26 NJE976F BMA → HAJ Jun 26, 15:10 UTCJun 26, 16:35 UTC1h 25m
2026-06-25 NJE510T BMA → BMA Jun 25, 14:50 UTCJun 25, 15:15 UTC25m
2026-06-22 NJE190T ARN → BMA Jun 22, 15:29 UTCJun 22, 15:40 UTC10m
2026-06-21 NJE477R - Jun 21, 16:54 UTCJun 21, 17:50 UTC55m
2026-06-21 NJE687M - Jun 21, 13:09 UTCJun 21, 14:15 UTC1h 5m
2026-06-21 NJE455E NCE → CPH Jun 21, 09:20 UTCJun 21, 11:15 UTC1h 55m
2026-06-20 NJE272V - Jun 20, 13:29 UTCJun 20, 13:44 UTC15m
2026-06-20 NJE193G - Jun 20, 10:34 UTCJun 20, 11:40 UTC1h 5m
2026-06-19 NJE807Q NCE → LBG Jun 19, 11:45 UTCJun 19, 12:44 UTC1h 0m
2026-06-19 NJE763V LTN → NCE Jun 19, 09:09 UTCJun 19, 10:50 UTC1h 40m
2026-06-18 NJE073B - Jun 18, 14:05 UTCJun 18, 15:45 UTC1h 40m
2026-06-18 NJE700Q MAN → SZG Jun 18, 09:55 UTCJun 18, 11:30 UTC1h 35m
2026-06-17 NJE798T - Jun 17, 11:30 UTCJun 17, 13:55 UTC2h 25m
2026-06-17 NJE615L - Jun 17, 09:05 UTCJun 17, 10:20 UTC1h 15m
2026-06-17 NJE848P - Jun 17, 06:30 UTCJun 17, 07:30 UTC1h 0m
2026-06-16 NJE438T RTM → CPH Jun 16, 13:34 UTCJun 16, 14:45 UTC1h 10m
2026-06-16 NJE157G BER → RTM Jun 16, 11:55 UTCJun 16, 12:55 UTC1h 0m
2026-06-16 NJE157G BQH → BER Jun 16, 09:04 UTCJun 16, 10:25 UTC1h 20m
2026-06-09 NJE8NJ - Jun 9, 15:20 UTCJun 9, 15:50 UTC30m
2026-06-09 NJE472B - Jun 9, 11:10 UTCJun 9, 13:45 UTC2h 35m
2026-06-08 NJE373R FAB → FAO Jun 8, 19:00 UTCJun 8, 21:15 UTC2h 15m
2026-06-08 NJE893G - Jun 8, 17:10 UTCJun 8, 17:35 UTC25m
2026-06-08 NJE920E - Jun 8, 13:35 UTCJun 8, 16:10 UTC2h 35m
2026-06-07 NJE920E - Jun 7, 15:50 UTCJun 8, 15:45 UTC23h 55m
2026-06-07 NJE920E - Jun 7, 13:50 UTCJun 8, 13:45 UTC23h 55m
2026-06-07 NJE920E - Jun 7, 13:20 UTCJun 7, 16:00 UTC2h 40m
2026-06-07 NJE491K OPO → BQH Jun 7, 10:25 UTCJun 7, 12:15 UTC1h 50m
2026-06-06 NJE346D BCN → OPO Jun 6, 13:54 UTCJun 6, 15:19 UTC1h 25m
2026-06-05 NJE065D - Jun 5, 11:20 UTCJun 5, 12:35 UTC1h 15m
2026-06-05 NJE8NJ BQH → LBG Jun 5, 08:05 UTCJun 5, 09:00 UTC55m
2026-06-04 NJE820C NCE → BQH Jun 4, 14:45 UTCJun 4, 16:25 UTC1h 40m
2026-06-04 NJE915Y - Jun 4, 02:25 UTCJun 4, 10:30 UTC8h 5m
2026-06-02 NJE8NJ - Jun 2, 16:25 UTCJun 2, 18:50 UTC2h 25m

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

Mode-S 491D87 frequently asked

What is Mode-S code 491D87?
491D87 is an ICAO 24-bit transponder address. Allocated to Portugal. Assigned to CS-GLG.
Where is Mode-S 491D87 registered?
Mode-S code 491D87 is allocated to Portugal (PT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 491D87 broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 491D87, octal 22216607, decimal 4,791,687.
What flights does 491D87 operate?
Mode-S 491D87 has broadcast 20 distinct callsigns, including NJE8NJ, NJE920E, NJE311P, NJU742A, NJE689N.