Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A47FDE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N38955 · BOEING 787-9 Dreamliner · operated by UNITED AIRLINES INC

Hex
A47FDE
Octal
51077736
Decimal
10,780,638
Country
US
Tail
N38955
Type
B789
Broadcasting now · callsign UAL82 · 39,000 ft
Flights observed
160
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Current position

A47FDE is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A47FDE 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
UAL821 United Airlines 8 2026-05-24
UAL32 - 7 2026-06-26
UAL820 United Airlines 6 2026-05-24
UAL842 United Airlines 5 2026-05-26
UAL839 - 5 2026-07-10
UAL187 - 5 2026-07-12
UAL83 United Airlines 4 2026-05-18
UAL82 - 4 2026-07-14
UAL27 United Airlines 4 2026-04-18
UAL181 United Airlines 4 2026-04-17
UAL1011 - 4 2026-06-18
UAL99 - 3 2026-06-26
UAL98 United Airlines 3 2026-06-25
UAL870 - 3 2026-07-11
UAL78 United Airlines 3 2026-05-13
UAL713 - 3 2026-07-11
UAL3731 United Airlines 3 2026-04-26
UAL353 United Airlines 3 2026-05-22
UAL2692 - 3 2026-07-08
UAL2096 United Airlines 3 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL82 - Jul 14, 02:10 UTCJul 14, 12:25 UTC10h 15m
2026-07-12 UAL187 - Jul 12, 20:05 UTCJul 12, 23:15 UTC3h 10m
2026-07-12 UAL187 JNB → EWR Jul 12, 20:19 UTCJul 13, 11:11 UTC14h 52m
2026-07-12 UAL187 JNB → EWR Jul 12, 20:19 UTCJul 13, 11:20 UTC15h 1m
2026-07-12 UAL188 - Jul 12, 02:10 UTCJul 12, 16:05 UTC13h 55m
2026-07-11 UAL713 - Jul 11, 18:10 UTCJul 11, 23:00 UTC4h 50m
2026-07-11 UAL870 - Jul 11, 00:45 UTCJul 11, 13:55 UTC13h 10m
2026-07-10 UAL839 - Jul 10, 06:20 UTCJul 10, 20:35 UTC14h 15m
2026-07-09 UAL935 - Jul 9, 12:35 UTCJul 9, 22:50 UTC10h 15m
2026-07-08 UAL923 - Jul 8, 22:50 UTCJul 9, 08:45 UTC9h 55m
2026-07-08 UAL2692 - Jul 8, 13:45 UTCJul 8, 18:25 UTC4h 40m
2026-07-08 UAL3916 - Jul 8, 02:00 UTCJul 8, 04:45 UTC2h 45m
2026-06-30 UAL63 - Jun 30, 03:10 UTCJun 30, 12:30 UTC9h 20m
2026-06-28 UAL62 - Jun 28, 00:04 UTCJun 28, 07:29 UTC7h 25m
2026-06-28 UAL62 IAH → GRU Jun 28, 00:03 UTCJun 28, 08:55 UTC8h 52m
2026-06-27 UAL6 - Jun 27, 08:20 UTCJun 27, 19:55 UTC11h 35m
2026-06-26 UAL32 LAX → NRT Jun 26, 18:15 UTCJun 27, 05:30 UTC11h 15m
2026-06-26 UAL32 - Jun 26, 18:24 UTCJun 27, 05:35 UTC11h 10m
2026-06-26 UAL99 - Jun 26, 00:59 UTCJun 26, 14:05 UTC13h 5m
2026-06-26 UAL99 - Jun 26, 00:20 UTCJun 26, 00:50 UTC30m
2026-06-25 UAL98 LAX → MEL Jun 25, 05:55 UTCJun 25, 21:20 UTC15h 25m
2026-06-24 UAL99 - Jun 24, 00:09 UTCJun 24, 13:30 UTC13h 20m
2026-06-23 UAL98 LAX → MEL Jun 23, 05:54 UTCJun 23, 19:29 UTC13h 35m
2026-06-23 UAL98 LAX → MEL Jun 23, 05:59 UTCJun 23, 21:26 UTC15h 27m
2026-06-22 UAL2403 - Jun 22, 16:24 UTCJun 22, 21:25 UTC5h 0m
2026-06-21 UAL187 - Jun 21, 20:34 UTCJun 22, 11:39 UTC15h 5m
2026-06-21 UAL187 JNB → EWR Jun 21, 20:39 UTCJun 22, 11:36 UTC14h 57m
2026-06-21 UAL188 EWR → JNB Jun 21, 02:20 UTCJun 21, 16:19 UTC14h 0m
2026-06-20 UAL713 SFO → EWR Jun 20, 17:39 UTCJun 20, 22:14 UTC4h 35m
2026-06-20 UAL114 - Jun 20, 07:14 UTCJun 20, 14:50 UTC7h 35m
2026-06-20 UAL115 - Jun 20, 04:14 UTCJun 20, 04:54 UTC40m
2026-06-19 UAL115 - Jun 19, 20:59 UTCJun 19, 21:24 UTC25m
2026-06-19 UAL1147 IAD → SFO Jun 19, 12:54 UTCJun 19, 18:14 UTC5h 20m
2026-06-18 UAL1011 IAD → IAD Jun 18, 22:50 UTCJun 19, 00:10 UTC1h 19m
2026-06-17 UAL2023 - Jun 17, 07:50 UTCJun 17, 08:45 UTC55m
2026-06-16 UAL2023 CPT → IAD Jun 16, 18:21 UTCJun 17, 08:43 UTC14h 22m
2026-06-16 UAL2023 - Jun 16, 18:05 UTCJun 16, 18:09 UTC5m
2026-06-16 UAL1011 - Jun 16, 14:00 UTCJun 16, 14:30 UTC30m
2026-06-16 UAL1011 IAD → CPT Jun 16, 00:26 UTCJun 16, 14:25 UTC13h 59m
2026-06-16 UAL1011 - Jun 16, 00:20 UTCJun 16, 07:25 UTC7h 5m
2026-06-15 UAL1849 MCO → EWR Jun 15, 15:40 UTCJun 15, 19:55 UTC4h 15m
2026-06-15 UAL806 - Jun 15, 02:44 UTCJun 15, 12:55 UTC10h 10m
2026-06-14 UAL805 SFO → ICN Jun 14, 07:26 UTCJun 14, 18:44 UTC11h 18m
2026-06-14 UAL805 SFO → ICN Jun 14, 07:30 UTCJun 14, 18:45 UTC11h 15m
2026-06-14 UAL3929 - Jun 14, 02:40 UTCJun 14, 03:40 UTC1h 0m
2026-06-12 UAL3890 NAS → EWR Jun 12, 17:05 UTCJun 13, 04:30 UTC11h 24m
2026-06-12 UAL3890 NAS → EWR Jun 12, 17:13 UTCJun 13, 04:19 UTC11h 6m
2026-05-30 UAL3870 IAB → SFO May 30, 16:00 UTCMay 30, 16:30 UTC30m
2026-05-29 UAL1593 LGA → DEN May 29, 13:50 UTCMay 29, 18:45 UTC4h 55m
2026-05-28 UAL2222 IAD → CPT May 28, 18:10 UTCMay 28, 18:35 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 N38955 page for operator, model, and routing details .

Mode-S A47FDE frequently asked

What is Mode-S code A47FDE?
A47FDE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N38955.
Where is Mode-S A47FDE registered?
Mode-S code A47FDE 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 A47FDE broadcasting right now?
Yes. Mode-S A47FDE is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A47FDE, octal 51077736, decimal 10,780,638.
What flights does A47FDE operate?
Mode-S A47FDE has broadcast 20 distinct callsigns, including UAL821, UAL32, UAL820, UAL842, UAL839.