sensors Mode-S transponder

AB7E7E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N84LD · operated by CALDWELL ROBERT M

Hex
AB7E7E
Octal
52677176
Decimal
11,239,038
Country
US
Tail
N84LD
No current signal · last broadcast Jul 25, 17:40 UTC
Flights observed
9
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 17:40 UTC

Last known position

Most recent position reported by Mode-S AB7E7E.

Country allocation

The ICAO 24-bit address AB7E7E falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States 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
N84LD - 9 2026-07-25

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-07-25 N84LD - Jul 25, 16:35 UTCJul 25, 17:40 UTC1h 5m
2026-07-25 N84LD - Jul 25, 11:25 UTCJul 25, 14:50 UTC3h 25m
2026-07-21 N84LD - Jul 21, 23:20 UTCJul 22, 00:00 UTC40m
2026-07-21 N84LD - Jul 21, 15:00 UTCJul 21, 17:00 UTC2h 0m
2026-07-20 N84LD - Jul 20, 12:30 UTCJul 20, 15:10 UTC2h 40m
2026-07-19 N84LD - Jul 19, 21:55 UTCJul 19, 22:25 UTC30m
2026-07-15 N84LD - Jul 15, 18:40 UTCJul 15, 18:50 UTC10m
2026-07-15 N84LD - Jul 15, 17:40 UTCJul 15, 18:00 UTC20m
2026-07-14 N84LD - Jul 14, 22:20 UTCJul 14, 22:30 UTC10m

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 N84LD page for operator, model, and routing details .

Mode-S AB7E7E frequently asked

What is Mode-S code AB7E7E?
AB7E7E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N84LD.
Where is Mode-S AB7E7E registered?
Mode-S code AB7E7E is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is AB7E7E broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 17:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB7E7E, octal 52677176, decimal 11,239,038.
What flights does AB7E7E operate?
Mode-S AB7E7E has broadcast 1 distinct callsign, including N84LD.