sensors Mode-S transponder

E4A54D

ICAO 24-bit transponder address · allocated to Brazil

Currently assigned to PR-GKC · BOEING 737-800

Hex
E4A54D
Octal
71122515
Decimal
14,984,525
Country
BR
Tail
PR-GKC
Type
B738
No current signal · last broadcast 18h ago
Flights observed
10
Distinct callsigns
8
Country
BR
Last broadcast
18h ago

Last known position

Most recent position reported by Mode-S E4A54D.

Country allocation

The ICAO 24-bit address E4A54D 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 8 distinct

Callsign Airline Flights Last seen
GLO2137 Gol Linhas Aéreas Inteligentes 2 2026-04-13
GLO1696 - 2 2026-04-13
GLO2105 Gol Linhas Aéreas Inteligentes 1 2026-04-14
GLO1721 - 1 2026-04-13
GLO1637 - 1 2026-04-13
GLO1579 - 1 2026-04-13
GLO1578 - 1 2026-04-12
GLO1260 - 1 2026-04-13

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-14 GLO2105 CWB → CGH Apr 14, 09:30 UTCApr 14, 09:40 UTC10m
2026-04-13 GLO1260 - Apr 13, 23:00 UTCApr 13, 23:30 UTC30m
2026-04-13 GLO1637 - Apr 13, 19:50 UTCApr 13, 21:20 UTC1h 30m
2026-04-13 GLO2137 SLZ → GIG Apr 13, 15:50 UTCApr 13, 19:45 UTC3h 55m
2026-04-13 GLO2137 SLZ → GIG Apr 13, 12:55 UTCApr 13, 16:05 UTC3h 10m
2026-04-13 GLO1721 - Apr 13, 09:10 UTCApr 13, 09:55 UTC45m
2026-04-13 GLO1696 - Apr 13, 04:05 UTCApr 13, 04:15 UTC10m
2026-04-13 GLO1696 - Apr 13, 03:20 UTCApr 13, 04:15 UTC55m
2026-04-13 GLO1579 - Apr 13, 00:20 UTCApr 13, 01:10 UTC50m
2026-04-12 GLO1578 - Apr 12, 18:15 UTCApr 12, 20:15 UTC2h 0m

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

Mode-S E4A54D frequently asked

What is Mode-S code E4A54D?
E4A54D is an ICAO 24-bit transponder address. Allocated to Brazil. Assigned to PR-GKC.
Where is Mode-S E4A54D registered?
Mode-S code E4A54D is allocated to Brazil (BR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is E4A54D broadcasting right now?
No active broadcast right now. Last signal was 18h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex E4A54D, octal 71122515, decimal 14,984,525.
What flights does E4A54D operate?
Mode-S E4A54D has broadcast 8 distinct callsigns, including GLO2137, GLO1696, GLO2105, GLO1721, GLO1637.