sensors Mode-S transponder

E4851A

ICAO 24-bit transponder address · allocated to Brazil

Currently assigned to PT-TMC · AIRBUS A-319

Hex
E4851A
Octal
71102432
Decimal
14,976,282
Country
BR
Tail
PT-TMC
Type
A319
No current signal · last broadcast 19h ago
Flights observed
6
Distinct callsigns
6
Country
BR
Last broadcast
19h ago

Last known position

Most recent position reported by Mode-S E4851A.

Country allocation

The ICAO 24-bit address E4851A 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 6 distinct

Callsign Airline Flights Last seen
TAM4738 - 1 2026-04-13
TAM3935 - 1 2026-04-12
TAM3501 - 1 2026-04-14
TAM3203 TAM Brazilian Airlines 1 2026-04-13
TAM3176 - 1 2026-04-13
TAM3167 - 1 2026-04-12

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-14 TAM3501 - Apr 14, 08:30 UTCApr 14, 08:55 UTC25m
2026-04-13 TAM3176 - Apr 13, 19:50 UTCApr 13, 21:05 UTC1h 15m
2026-04-13 TAM4738 - Apr 13, 13:55 UTCApr 13, 14:55 UTC1h 0m
2026-04-13 TAM3203 CGH → BSB Apr 13, 11:00 UTCApr 13, 11:45 UTC45m
2026-04-12 TAM3935 - Apr 12, 23:55 UTCApr 13, 00:10 UTC15m
2026-04-12 TAM3167 - Apr 12, 19:35 UTCApr 12, 20:15 UTC40m

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 PT-TMC page for operator, model, and routing details .

Mode-S E4851A frequently asked

What is Mode-S code E4851A?
E4851A is an ICAO 24-bit transponder address. Allocated to Brazil. Assigned to PT-TMC.
Where is Mode-S E4851A registered?
Mode-S code E4851A is allocated to Brazil (BR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is E4851A broadcasting right now?
No active broadcast right now. Last signal was 19h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex E4851A, octal 71102432, decimal 14,976,282.
What flights does E4851A operate?
Mode-S E4851A has broadcast 6 distinct callsigns, including TAM4738, TAM3935, TAM3501, TAM3203, TAM3176.