Apparatus

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sensors Mode-S transponder

E499DB

ICAO 24-bit transponder address · allocated to Brazil

Currently assigned to PR-OTX · AGUSTA AW-139

Hex
E499DB
Octal
71114733
Decimal
14,981,595
Country
BR
Tail
PR-OTX
Type
A139
No current signal · last broadcast 13h ago
Flights observed
178
Distinct callsigns
1
Country
BR
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S E499DB.

Country allocation

The ICAO 24-bit address E499DB falls within the block assigned to Brazil (BR) by ICAO Annex 10, Volume III. Every aircraft registered in Brazil 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 1 distinct

Callsign Airline Flights Last seen
PROTX - 178 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 PROTX - May 29, 15:35 UTCMay 29, 16:55 UTC1h 20m
2026-05-29 PROTX VIX → VIX May 29, 12:20 UTCMay 29, 13:45 UTC1h 25m
2026-05-28 PROTX - May 28, 18:25 UTCMay 28, 19:50 UTC1h 25m
2026-05-28 PROTX - May 28, 17:05 UTCMay 28, 17:35 UTC30m
2026-05-28 PROTX - May 28, 15:55 UTCMay 28, 16:20 UTC25m
2026-05-28 PROTX VIX → VIX May 28, 12:40 UTCMay 28, 14:05 UTC1h 25m
2026-05-27 PROTX - May 27, 18:15 UTCMay 27, 19:15 UTC1h 0m
2026-05-27 PROTX VIX → VIX May 27, 16:05 UTCMay 27, 17:30 UTC1h 25m
2026-05-27 PROTX - May 27, 09:45 UTCMay 27, 11:05 UTC1h 20m
2026-05-26 PROTX VIX → VIX May 26, 17:59 UTCMay 26, 19:05 UTC1h 5m
2026-05-26 PROTX - May 26, 15:39 UTCMay 26, 16:59 UTC1h 20m
2026-05-26 PROTX VIX → VIX May 26, 12:20 UTCMay 26, 13:45 UTC1h 25m
2026-05-26 PROTX - May 26, 09:55 UTCMay 26, 11:20 UTC1h 25m
2026-05-25 PROTX - May 25, 18:00 UTCMay 25, 19:05 UTC1h 5m
2026-05-25 PROTX VIX → VIX May 25, 15:25 UTCMay 25, 16:45 UTC1h 20m
2026-05-25 PROTX - May 25, 12:30 UTCMay 25, 13:45 UTC1h 15m
2026-05-25 PROTX - May 25, 09:50 UTCMay 25, 11:25 UTC1h 35m
2026-05-24 PROTX VIX → VIX May 24, 18:00 UTCMay 24, 19:00 UTC1h 0m
2026-05-24 PROTX - May 24, 12:15 UTCMay 24, 13:30 UTC1h 15m
2026-05-24 PROTX - May 24, 09:50 UTCMay 24, 11:10 UTC1h 20m
2026-05-23 PROTX VIX → VIX May 23, 18:20 UTCMay 23, 19:20 UTC1h 0m
2026-05-23 PROTX - May 23, 16:35 UTCMay 23, 17:05 UTC30m
2026-05-23 PROTX - May 23, 15:40 UTCMay 23, 16:05 UTC25m
2026-05-23 PROTX VIX → VIX May 23, 12:55 UTCMay 23, 14:15 UTC1h 20m
2026-05-23 PROTX - May 23, 10:00 UTCMay 23, 11:25 UTC1h 25m
2026-05-22 PROTX VIX → VIX May 22, 18:30 UTCMay 22, 19:55 UTC1h 25m
2026-05-22 PROTX - May 22, 16:50 UTCMay 22, 17:25 UTC35m
2026-05-22 PROTX - May 22, 15:45 UTCMay 22, 16:15 UTC30m
2026-05-22 PROTX - May 22, 12:40 UTCMay 22, 14:00 UTC1h 20m
2026-05-21 PROTX VIX → VIX May 21, 18:30 UTCMay 21, 19:55 UTC1h 25m
2026-05-21 PROTX VIX → VIX May 21, 16:01 UTCMay 21, 17:35 UTC1h 35m
2026-05-21 PROTX VIX → VIX May 21, 12:35 UTCMay 21, 13:45 UTC1h 10m
2026-05-21 PROTX VIX → VIX May 21, 09:55 UTCMay 21, 11:15 UTC1h 20m
2026-05-20 PROTX - May 20, 17:55 UTCMay 20, 19:00 UTC1h 5m
2026-05-20 PROTX - May 20, 15:35 UTCMay 20, 16:55 UTC1h 20m
2026-05-20 PROTX VIX → VIX May 20, 12:35 UTCMay 20, 14:00 UTC1h 25m
2026-05-20 PROTX - May 20, 10:05 UTCMay 20, 11:30 UTC1h 25m
2026-05-19 PROTX VIX → VIX May 19, 18:00 UTCMay 19, 19:00 UTC1h 0m
2026-05-19 PROTX - May 19, 15:35 UTCMay 19, 16:55 UTC1h 20m
2026-05-19 PROTX - May 19, 12:30 UTCMay 19, 13:45 UTC1h 15m
2026-05-19 PROTX VIX → VIX May 19, 09:50 UTCMay 19, 11:15 UTC1h 25m
2026-05-18 PROTX - May 18, 19:10 UTCMay 18, 20:20 UTC1h 10m
2026-05-18 PROTX VIX → VIX May 18, 16:40 UTCMay 18, 18:00 UTC1h 20m
2026-05-18 PROTX - May 18, 13:20 UTCMay 18, 14:35 UTC1h 15m
2026-05-18 PROTX - May 18, 10:30 UTCMay 18, 12:00 UTC1h 30m
2026-05-17 PROTX VIX → VIX May 17, 17:40 UTCMay 17, 18:40 UTC1h 0m
2026-05-17 PROTX - May 17, 12:20 UTCMay 17, 13:55 UTC1h 35m
2026-05-16 PROTX - May 16, 18:00 UTCMay 16, 19:05 UTC1h 5m
2026-05-16 PROTX VIX → VIX May 16, 15:25 UTCMay 16, 16:50 UTC1h 25m
2026-05-16 PROTX VIX → VIX May 16, 12:31 UTCMay 16, 13:51 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 PR-OTX page for operator, model, and routing details .

Mode-S E499DB frequently asked

What is Mode-S code E499DB?
E499DB is an ICAO 24-bit transponder address. Allocated to Brazil. Assigned to PR-OTX.
Where is Mode-S E499DB registered?
Mode-S code E499DB is allocated to Brazil (BR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is E499DB broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex E499DB, octal 71114733, decimal 14,981,595.
What flights does E499DB operate?
Mode-S E499DB has broadcast 1 distinct callsign, including PROTX.