Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A47FD9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N38950 · BOEING 787-9 Dreamliner · operated by UNITED AIRLINES INC

Hex
A47FD9
Octal
51077731
Decimal
10,780,633
Country
US
Tail
N38950
Type
B789
Broadcasting now · callsign UAL969 · 33,975 ft
Flights observed
144
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:50 UTC

Current position

A47FD9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A47FD9 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 9 2026-07-17
UAL820 - 8 2026-07-17
UAL187 United Airlines 8 2026-05-16
UAL62 United Airlines 6 2026-07-22
UAL7 United Airlines 5 2026-07-23
UAL123 United Airlines 5 2026-06-06
UAL122 United Airlines 5 2026-06-05
UAL761 United Airlines 4 2026-05-27
UAL760 United Airlines 4 2026-05-27
UAL713 United Airlines 4 2026-06-03
UAL63 United Airlines 4 2026-07-23
UAL61 - 4 2026-04-14
UAL6 United Airlines 4 2026-07-21
UAL27 United Airlines 4 2026-07-26
UAL188 United Airlines 4 2026-05-16
UAL152 United Airlines 4 2026-05-12
UAL83 United Airlines 3 2026-06-05
UAL79 United Airlines 3 2026-05-17
UAL33 United Airlines 3 2026-05-29
UAL32 United Airlines 3 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL26 LHR → DEN Jul 26, 11:25 UTCJul 26, 20:35 UTC9h 10m
2026-07-26 UAL27 DEN → LHR Jul 26, 00:20 UTCJul 26, 08:45 UTC8h 26m
2026-07-26 UAL27 DEN → LHR Jul 26, 00:08 UTCJul 26, 08:37 UTC8h 29m
2026-07-25 UAL181 FRA → DEN Jul 25, 09:45 UTCJul 25, 19:15 UTC9h 30m
2026-07-24 UAL182 DEN → FRA Jul 24, 22:15 UTCJul 25, 06:50 UTC8h 35m
2026-07-24 UAL142 NRT → DEN Jul 24, 08:15 UTCJul 24, 18:15 UTC10h 0m
2026-07-23 UAL7 IAH → NRT Jul 23, 16:05 UTCJul 24, 04:15 UTC12h 10m
2026-07-23 UAL63 GRU → IAH Jul 23, 01:20 UTCJul 23, 10:30 UTC9h 10m
2026-07-23 UAL63 GRU → IAH Jul 23, 01:11 UTCJul 23, 10:25 UTC9h 14m
2026-07-22 UAL62 IAH → GRU Jul 22, 00:30 UTCJul 22, 05:25 UTC4h 55m
2026-07-22 UAL62 IAH → GRU Jul 22, 00:33 UTCJul 22, 09:26 UTC8h 53m
2026-07-21 UAL6 NRT → IAH Jul 21, 08:15 UTCJul 21, 08:50 UTC35m
2026-07-21 UAL6 NRT → IAH Jul 21, 08:26 UTCJul 21, 19:43 UTC11h 17m
2026-07-20 UAL32 LAX → NRT Jul 20, 18:15 UTCJul 21, 04:45 UTC10h 30m
2026-07-20 UAL32 LAX → NRT Jul 20, 18:15 UTCJul 21, 04:42 UTC10h 27m
2026-07-20 UAL353 SAN → EWR Jul 20, 00:50 UTCJul 20, 05:20 UTC4h 30m
2026-07-19 UAL2096 - Jul 19, 16:35 UTCJul 19, 21:35 UTC5h 0m
2026-07-19 UAL842 SYD → LAX Jul 19, 00:00 UTCJul 19, 13:20 UTC13h 20m
2026-07-18 UAL839 - Jul 18, 06:50 UTCJul 18, 20:40 UTC13h 50m
2026-07-17 UAL821 SFO → MEX Jul 17, 14:15 UTCJul 18, 03:35 UTC13h 21m
2026-07-17 UAL821 SFO → MEX Jul 17, 11:15 UTCJul 17, 11:35 UTC20m
2026-07-17 UAL821 SFO → MEX Jul 17, 09:10 UTCJul 17, 09:25 UTC15m
2026-07-17 UAL820 - Jul 17, 03:05 UTCJul 17, 03:14 UTC10m
2026-07-17 UAL820 - Jul 17, 01:05 UTCJul 17, 01:20 UTC15m
2026-07-16 UAL4202 - Jul 16, 05:10 UTCJul 16, 05:25 UTC15m
2026-06-10 UAL3889 MCO → EWR Jun 10, 16:00 UTCJun 11, 03:30 UTC11h 30m
2026-06-09 UAL28 SIN → SFO Jun 9, 17:15 UTCJun 10, 04:25 UTC11h 10m
2026-06-08 UAL29 SFO → SIN Jun 8, 19:00 UTCJun 9, 08:20 UTC13h 20m
2026-06-08 UAL29 SFO → SIN Jun 8, 18:35 UTCJun 9, 10:44 UTC16h 9m
2026-06-08 UAL806 ICN → SFO Jun 8, 02:56 UTCJun 8, 12:19 UTC9h 23m
2026-06-08 UAL806 ICN → SFO Jun 8, 02:40 UTCJun 8, 12:20 UTC9h 40m
2026-06-07 UAL805 SFO → ICN Jun 7, 09:05 UTCJun 7, 20:55 UTC11h 50m
2026-06-06 UAL1227 PHX → IAD Jun 6, 17:40 UTCJun 6, 23:24 UTC5h 45m
2026-06-06 UAL123 ANC → ORD Jun 6, 06:55 UTCJun 6, 13:44 UTC6h 50m
2026-06-05 UAL122 IAD → LHR Jun 5, 13:50 UTCJun 5, 19:55 UTC6h 5m
2026-06-05 UAL83 DEL → EWR Jun 5, 00:45 UTCJun 5, 09:35 UTC8h 50m
2026-06-04 UAL83 DEL → EWR Jun 4, 18:35 UTCJun 4, 18:50 UTC15m
2026-06-04 UAL83 DEL → EWR Jun 4, 18:32 UTCJun 5, 09:27 UTC14h 55m
2026-06-04 UAL82 EWR → DEL Jun 4, 15:00 UTCJun 4, 15:25 UTC25m
2026-06-04 UAL82 EWR → DEL Jun 4, 01:35 UTCJun 4, 11:45 UTC10h 10m
2026-06-03 UAL713 ORD → DEL Jun 3, 17:35 UTCJun 3, 22:25 UTC4h 50m
2026-06-03 UAL870 SYD → SFO Jun 3, 00:50 UTCJun 3, 13:45 UTC12h 55m
2026-06-02 UAL863 SFO → SYD Jun 2, 06:55 UTCJun 2, 20:45 UTC13h 50m
2026-06-01 UAL1227 PHX → IAD Jun 1, 17:55 UTCJun 1, 23:50 UTC5h 55m
2026-06-01 UAL123 ANC → ORD Jun 1, 07:05 UTCJun 1, 13:40 UTC6h 35m
2026-06-01 UAL123 ANC → ORD Jun 1, 07:02 UTCJun 1, 13:41 UTC6h 39m
2026-05-31 UAL122 IAD → LHR May 31, 13:45 UTCMay 31, 19:55 UTC6h 10m
2026-05-31 UAL2303 IAD → SAN May 31, 08:25 UTCMay 31, 11:10 UTC2h 45m
2026-05-30 UAL199 PVG → LAX May 30, 13:20 UTCMay 30, 14:35 UTC1h 15m
2026-05-30 UAL199 PVG → LAX May 30, 06:40 UTCMay 30, 23:15 UTC16h 35m

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 N38950 page for operator, model, and routing details .

Mode-S A47FD9 frequently asked

What is Mode-S code A47FD9?
A47FD9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N38950.
Where is Mode-S A47FD9 registered?
Mode-S code A47FD9 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 A47FD9 broadcasting right now?
Yes. Mode-S A47FD9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A47FD9, octal 51077731, decimal 10,780,633.
What flights does A47FD9 operate?
Mode-S A47FD9 has broadcast 20 distinct callsigns, including UAL821, UAL820, UAL187, UAL62, UAL7.