Apparatus

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sensors Mode-S transponder

E4A1CD

ICAO 24-bit transponder address · allocated to Brazil

Hex
E4A1CD
Octal
71120715
Decimal
14,983,629
Country
BR
No current signal · last broadcast Jul 26, 20:35 UTC
Flights observed
36
Distinct callsigns
1
Country
BR
Last broadcast
Jul 26, 20:35 UTC

Last known position

Most recent position reported by Mode-S E4A1CD.

Country allocation

The ICAO 24-bit address E4A1CD 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
PRRUN - 36 2026-07-26

Recent flights last 36

DateFlightRouteTakeoffLandingDuration
2026-07-26 PRRUN - Jul 26, 20:20 UTCJul 26, 20:35 UTC15m
2026-07-25 PRRUN - Jul 25, 13:10 UTCJul 25, 13:25 UTC15m
2026-07-22 PRRUN - Jul 22, 20:55 UTCJul 22, 21:10 UTC15m
2026-07-22 PRRUN - Jul 22, 17:20 UTCJul 22, 17:35 UTC15m
2026-07-11 PRRUN - Jul 11, 18:10 UTCJul 11, 18:30 UTC20m
2026-07-11 PRRUN - Jul 11, 11:40 UTCJul 11, 12:15 UTC35m
2026-07-09 PRRUN - Jul 9, 16:10 UTCJul 9, 17:15 UTC1h 5m
2026-07-02 PRRUN - Jul 2, 18:15 UTCJul 2, 18:25 UTC10m
2026-07-02 PRRUN - Jul 2, 15:55 UTCJul 2, 16:05 UTC10m
2026-06-28 PRRUN - Jun 28, 18:55 UTCJun 28, 19:44 UTC50m
2026-06-28 PRRUN - Jun 28, 17:55 UTCJun 28, 18:25 UTC30m
2026-06-28 PRRUN - Jun 28, 16:29 UTCJun 28, 17:10 UTC40m
2026-06-27 PRRUN - Jun 27, 17:39 UTCJun 27, 17:55 UTC15m
2026-06-27 PRRUN - Jun 27, 11:04 UTCJun 27, 11:25 UTC20m
2026-06-26 PRRUN - Jun 26, 19:39 UTCJun 26, 20:50 UTC1h 10m
2026-06-26 PRRUN - Jun 26, 18:54 UTCJun 26, 19:09 UTC15m
2026-06-26 PRRUN - Jun 26, 15:45 UTCJun 26, 16:00 UTC15m
2026-06-26 PRRUN - Jun 26, 12:05 UTCJun 26, 12:44 UTC40m
2026-06-25 PRRUN - Jun 25, 20:14 UTCJun 25, 20:25 UTC10m
2026-06-25 PRRUN - Jun 25, 18:45 UTCJun 25, 19:09 UTC25m
2026-06-25 PRRUN - Jun 25, 12:25 UTCJun 25, 12:35 UTC10m
2026-06-20 PRRUN - Jun 20, 20:14 UTCJun 20, 20:25 UTC10m
2026-06-20 PRRUN - Jun 20, 19:34 UTCJun 20, 19:44 UTC10m
2026-06-20 PRRUN - Jun 20, 15:39 UTCJun 20, 15:49 UTC10m
2026-06-20 PRRUN - Jun 20, 08:59 UTCJun 20, 09:24 UTC25m
2026-06-12 PRRUN - Jun 12, 18:50 UTCJun 12, 19:10 UTC20m
2026-06-12 PRRUN - Jun 12, 16:20 UTCJun 12, 17:35 UTC1h 15m
2026-06-05 PRRUN - Jun 5, 14:30 UTCJun 5, 14:40 UTC10m
2026-06-05 PRRUN - Jun 5, 14:05 UTCJun 5, 14:20 UTC15m
2026-06-04 PRRUN - Jun 4, 17:40 UTCJun 4, 17:55 UTC15m
2026-05-23 PRRUN - May 23, 20:20 UTCMay 23, 20:45 UTC25m
2026-05-21 PRRUN - May 21, 17:00 UTCMay 21, 17:10 UTC10m
2026-04-19 PRRUN - Apr 19, 10:55 UTCApr 19, 11:10 UTC15m
2026-04-13 PRRUN - Apr 13, 19:50 UTCApr 13, 20:05 UTC15m
2026-04-13 PRRUN - Apr 13, 19:25 UTCApr 13, 20:05 UTC40m
2026-04-13 PRRUN - Apr 13, 18:30 UTCApr 13, 18:45 UTC15m

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.

Mode-S E4A1CD frequently asked

What is Mode-S code E4A1CD?
E4A1CD is an ICAO 24-bit transponder address. Allocated to Brazil.
Where is Mode-S E4A1CD registered?
Mode-S code E4A1CD is allocated to Brazil (BR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is E4A1CD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex E4A1CD, octal 71120715, decimal 14,983,629.
What flights does E4A1CD operate?
Mode-S E4A1CD has broadcast 1 distinct callsign, including PRRUN.