sensors Mode-S transponder

AA7EBC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N77552 · BOEING 737 MAX 9 · operated by UNITED AIRLINES INC

Hex
AA7EBC
Octal
52477274
Decimal
11,173,564
Country
US
Tail
N77552
Type
B39M
Broadcasting now · callsign UAL2095 · 36,000 ft
Flights observed
12
Distinct callsigns
6
Country
US
Last broadcast
19h ago

Current position

AA7EBC is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AA7EBC 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 6 distinct

Callsign Airline Flights Last seen
UAL1670 - 3 2026-04-13
UAL1266 - 3 2026-04-14
UAL515 - 2 2026-04-12
UAL2204 - 2 2026-04-13
UAL2485 - 1 2026-04-13
UAL1461 - 1 2026-04-13

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-14 UAL1266 - Apr 14, 09:10 UTCApr 14, 10:25 UTC1h 15m
2026-04-14 UAL1266 - Apr 14, 07:10 UTCApr 14, 09:05 UTC1h 55m
2026-04-14 UAL1266 - Apr 14, 06:01 UTCApr 14, 10:34 UTC4h 33m
2026-04-13 UAL2485 - Apr 13, 22:10 UTCApr 13, 23:45 UTC1h 35m
2026-04-13 UAL2204 - Apr 13, 19:50 UTCApr 13, 20:20 UTC30m
2026-04-13 UAL2204 - Apr 13, 16:25 UTCApr 13, 20:10 UTC3h 45m
2026-04-13 UAL1670 - Apr 13, 12:20 UTCApr 13, 13:30 UTC1h 10m
2026-04-13 UAL1670 - Apr 13, 11:55 UTCApr 13, 13:30 UTC1h 35m
2026-04-13 UAL1670 - Apr 13, 08:40 UTCApr 13, 12:15 UTC3h 35m
2026-04-13 UAL1461 - Apr 13, 00:51 UTCApr 13, 03:23 UTC2h 32m
2026-04-12 UAL515 - Apr 12, 16:16 UTCApr 12, 19:55 UTC3h 39m
2026-04-12 UAL515 - Apr 12, 17:15 UTCApr 12, 19:55 UTC2h 40m

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 N77552 page for operator, model, and routing details .

Mode-S AA7EBC frequently asked

What is Mode-S code AA7EBC?
AA7EBC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N77552.
Where is Mode-S AA7EBC registered?
Mode-S code AA7EBC 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 AA7EBC broadcasting right now?
Yes. Mode-S AA7EBC is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA7EBC, octal 52477274, decimal 11,173,564.
What flights does AA7EBC operate?
Mode-S AA7EBC has broadcast 6 distinct callsigns, including UAL1670, UAL1266, UAL515, UAL2204, UAL2485.