Apparatus

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sensors Mode-S transponder

A6CE39

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N538AV · AIRBUS A-320 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A6CE39
Octal
51547071
Decimal
10,931,769
Country
US
Tail
N538AV
Type
A320
Broadcasting now · callsign GUG743 · 39,000 ft
Flights observed
574
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A6CE39 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A6CE39 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 20 distinct

Callsign Airline Flights Last seen
GUG743 - 84 2026-07-14
GUG705 - 67 2026-07-14
GUG704 - 67 2026-07-14
GUG703 - 64 2026-07-14
GUG701 - 64 2026-07-14
GUG702 - 62 2026-07-14
GUG700 - 62 2026-07-14
GUG742 - 50 2026-07-13
TAI579 - 15 2026-07-10
TAI578 - 14 2026-07-11
TAI370 - 4 2026-07-01
TAI369 - 4 2026-06-28
TAI589 - 2 2026-07-01
TAI588 - 2 2026-07-01
TAI573 - 2 2026-07-07
TAI383 Avianca El Salvador 2 2026-04-20
TAI382 Avianca El Salvador 2 2026-04-21
AVA165 Avianca - Aerovias Nacionales de Colombia, S.A. 2 2026-04-21
TAI572 - 1 2026-07-07
GUG744 Aviateca 1 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 GUG743 - Jul 14, 15:35 UTCJul 14, 16:00 UTC25m
2026-07-14 GUG705 - Jul 14, 13:50 UTCJul 14, 14:15 UTC25m
2026-07-14 GUG704 - Jul 14, 12:10 UTCJul 14, 12:20 UTC10m
2026-07-14 GUG703 - Jul 14, 04:50 UTCJul 14, 05:15 UTC25m
2026-07-14 GUG702 - Jul 14, 03:15 UTCJul 14, 03:30 UTC15m
2026-07-14 GUG701 - Jul 14, 01:50 UTCJul 14, 02:10 UTC20m
2026-07-14 GUG700 - Jul 14, 00:00 UTCJul 14, 00:15 UTC15m
2026-07-13 GUG742 BOG → GUA Jul 13, 20:20 UTCJul 13, 22:50 UTC2h 30m
2026-07-13 GUG743 GUA → BOG Jul 13, 15:35 UTCJul 13, 18:20 UTC2h 45m
2026-07-13 GUG705 - Jul 13, 14:00 UTCJul 13, 14:25 UTC25m
2026-07-13 GUG704 - Jul 13, 12:10 UTCJul 13, 12:25 UTC15m
2026-07-13 GUG703 - Jul 13, 05:10 UTCJul 13, 05:35 UTC25m
2026-07-13 GUG701 - Jul 13, 02:05 UTCJul 13, 02:25 UTC20m
2026-07-13 GUG700 - Jul 13, 00:15 UTCJul 13, 00:30 UTC15m
2026-07-12 GUG742 BOG → GUA Jul 12, 20:10 UTCJul 12, 22:50 UTC2h 40m
2026-07-12 GUG743 GUA → BOG Jul 12, 15:40 UTCJul 12, 18:25 UTC2h 45m
2026-07-12 GUG705 - Jul 12, 13:55 UTCJul 12, 14:20 UTC25m
2026-07-12 GUG704 - Jul 12, 12:01 UTCJul 12, 12:10 UTC10m
2026-07-12 GUG703 - Jul 12, 05:05 UTCJul 12, 05:35 UTC30m
2026-07-12 GUG702 - Jul 12, 03:30 UTCJul 12, 03:40 UTC10m
2026-07-12 GUG701 - Jul 12, 02:01 UTCJul 12, 02:25 UTC25m
2026-07-12 GUG700 - Jul 12, 00:20 UTCJul 12, 00:35 UTC15m
2026-07-11 GUG742 - Jul 11, 20:10 UTCJul 11, 23:00 UTC2h 50m
2026-07-11 GUG743 GUA → BOG Jul 11, 15:25 UTCJul 11, 18:10 UTC2h 45m
2026-07-11 GUG705 - Jul 11, 13:45 UTCJul 11, 14:10 UTC25m
2026-07-11 GUG704 - Jul 11, 12:00 UTCJul 11, 12:15 UTC15m
2026-07-11 TAI578 - Jul 11, 04:45 UTCJul 11, 05:05 UTC20m
2026-07-10 TAI579 - Jul 10, 11:25 UTCJul 10, 11:45 UTC20m
2026-07-10 GUG703 - Jul 10, 04:50 UTCJul 10, 05:15 UTC25m
2026-07-10 GUG702 - Jul 10, 03:20 UTCJul 10, 03:40 UTC20m
2026-07-10 GUG701 - Jul 10, 01:55 UTCJul 10, 02:20 UTC25m
2026-07-10 GUG700 - Jul 10, 00:15 UTCJul 10, 00:25 UTC10m
2026-07-09 GUG742 BOG → GUA Jul 9, 20:15 UTCJul 9, 23:00 UTC2h 45m
2026-07-09 GUG743 GUA → BOG Jul 9, 15:30 UTCJul 9, 18:20 UTC2h 50m
2026-07-09 GUG705 - Jul 9, 14:10 UTCJul 9, 14:25 UTC15m
2026-07-09 GUG704 - Jul 9, 12:10 UTCJul 9, 12:25 UTC15m
2026-07-09 GUG703 - Jul 9, 05:05 UTCJul 9, 05:20 UTC15m
2026-07-09 GUG702 - Jul 9, 03:20 UTCJul 9, 03:30 UTC10m
2026-07-09 GUG701 - Jul 9, 01:55 UTCJul 9, 02:10 UTC15m
2026-07-09 GUG700 - Jul 9, 00:05 UTCJul 9, 00:20 UTC15m
2026-07-08 GUG743 GUA → GUA Jul 8, 15:30 UTCJul 8, 22:55 UTC7h 25m
2026-07-08 GUG705 - Jul 8, 13:50 UTCJul 8, 14:20 UTC30m
2026-07-08 GUG704 - Jul 8, 12:15 UTCJul 8, 12:30 UTC15m
2026-07-08 TAI578 - Jul 8, 04:40 UTCJul 8, 05:00 UTC20m
2026-07-07 TAI573 - Jul 7, 16:10 UTCJul 7, 16:25 UTC15m
2026-07-07 TAI572 - Jul 7, 14:35 UTCJul 7, 14:55 UTC20m
2026-07-07 TAI579 GUA → SAL Jul 7, 11:25 UTCJul 7, 11:45 UTC20m
2026-07-07 GUG703 - Jul 7, 05:30 UTCJul 7, 05:45 UTC15m
2026-07-07 GUG702 - Jul 7, 03:55 UTCJul 7, 04:10 UTC15m
2026-07-07 GUG701 - Jul 7, 01:55 UTCJul 7, 02:20 UTC25m

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 N538AV page for operator, model, and routing details .

Mode-S A6CE39 frequently asked

What is Mode-S code A6CE39?
A6CE39 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N538AV.
Where is Mode-S A6CE39 registered?
Mode-S code A6CE39 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 A6CE39 broadcasting right now?
Yes. Mode-S A6CE39 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6CE39, octal 51547071, decimal 10,931,769.
What flights does A6CE39 operate?
Mode-S A6CE39 has broadcast 20 distinct callsigns, including GUG743, GUG705, GUG704, GUG703, GUG701.