Apparatus

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sensors Mode-S transponder

A5CF8B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N47369 · operated by UNITED AIRLINES INC

Hex
A5CF8B
Octal
51347613
Decimal
10,866,571
Country
US
Tail
N47369
Type
B38M
Broadcasting now · callsign UAL1589 · 9,300 ft
Flights observed
421
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A5CF8B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A5CF8B 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
UAL1749 - 9 2026-07-06
UAL1750 - 8 2026-07-06
UAL268 - 5 2026-07-13
UAL206 - 5 2026-07-14
UAL2010 - 5 2026-07-06
UAL1271 United Airlines 5 2026-06-13
UAL643 - 4 2026-07-01
UAL488 - 4 2026-06-23
UAL278 United Airlines 4 2026-04-16
UAL2375 United Airlines 4 2026-05-31
UAL2224 - 4 2026-07-11
UAL1676 United Airlines 4 2026-05-30
UAL1295 - 4 2026-04-13
UAL1214 - 4 2026-06-18
UAL840 United Airlines 3 2026-06-20
UAL663 United Airlines 3 2026-05-12
UAL598 - 3 2026-06-17
UAL574 - 3 2026-07-01
UAL571 United Airlines 3 2026-07-07
UAL513 United Airlines 3 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL1589 - Jul 14, 17:25 UTCJul 14, 18:45 UTC1h 20m
2026-07-14 UAL2448 - Jul 14, 12:55 UTCJul 14, 16:05 UTC3h 10m
2026-07-14 UAL206 - Jul 14, 05:35 UTCJul 14, 10:20 UTC4h 45m
2026-07-13 UAL268 - Jul 13, 21:45 UTCJul 13, 23:55 UTC2h 10m
2026-07-13 UAL268 EWR → BOG Jul 13, 21:40 UTCJul 14, 02:44 UTC5h 4m
2026-07-13 UAL1900 SEA → EWR Jul 13, 14:45 UTCJul 13, 19:35 UTC4h 50m
2026-07-13 UAL1796 - Jul 13, 01:10 UTCJul 13, 06:20 UTC5h 10m
2026-07-12 UAL2003 BZN → EWR Jul 12, 19:57 UTCJul 12, 23:47 UTC3h 50m
2026-07-12 UAL1538 EWR → EWR Jul 12, 13:30 UTCJul 12, 23:50 UTC10h 20m
2026-07-12 UAL406T LAS → EWR Jul 12, 07:05 UTCJul 12, 11:35 UTC4h 30m
2026-07-12 UAL1800 EWR → LAS Jul 12, 01:15 UTCJul 12, 05:50 UTC4h 35m
2026-07-11 UAL2415 - Jul 11, 20:20 UTCJul 11, 21:20 UTC1h 0m
2026-07-11 UAL2616 - Jul 11, 16:20 UTCJul 11, 17:45 UTC1h 25m
2026-07-11 UAL1061 DCA → ORD Jul 11, 12:55 UTCJul 11, 14:30 UTC1h 35m
2026-07-11 UAL2224 - Jul 11, 02:25 UTCJul 11, 04:45 UTC2h 20m
2026-07-11 UAL2224 IAH → DCA Jul 11, 02:23 UTCJul 11, 04:55 UTC2h 32m
2026-07-10 UAL1245 PLS → IAH Jul 10, 19:53 UTCJul 10, 23:17 UTC3h 24m
2026-07-10 UAL1245 - Jul 10, 15:15 UTCJul 10, 23:20 UTC8h 6m
2026-07-10 UAL1552 - Jul 10, 06:55 UTCJul 10, 13:20 UTC6h 25m
2026-07-09 UAL841 ORD → ANC Jul 9, 21:53 UTCJul 10, 03:40 UTC5h 47m
2026-07-09 UAL841 - Jul 9, 21:45 UTCJul 10, 00:45 UTC3h 0m
2026-07-09 UAL1888 DCA → ORD Jul 9, 18:30 UTCJul 9, 20:10 UTC1h 40m
2026-07-09 UAL1381 ORD → DCA Jul 9, 15:35 UTCJul 9, 17:10 UTC1h 35m
2026-07-09 UAL834 ANC → ORD Jul 9, 08:17 UTCJul 9, 13:37 UTC5h 20m
2026-07-09 UAL834 ANC → ORD Jul 9, 08:15 UTCJul 9, 13:55 UTC5h 40m
2026-07-09 UAL1594 - Jul 9, 02:10 UTCJul 9, 06:35 UTC4h 25m
2026-07-08 UAL1955 SLC → SFO Jul 8, 23:15 UTCJul 9, 00:50 UTC1h 35m
2026-07-08 UAL1840 EWR → ORD Jul 8, 19:50 UTCJul 8, 20:55 UTC1h 5m
2026-07-08 UAL2285 SMF → DEN Jul 8, 15:55 UTCJul 8, 17:40 UTC1h 45m
2026-07-08 UAL1302 SFO → SMF Jul 8, 10:30 UTCJul 8, 10:50 UTC20m
2026-07-08 UAL1302 DEN → SAN Jul 8, 10:18 UTCJul 8, 10:47 UTC29m
2026-07-08 UAL628 - Jul 8, 03:45 UTCJul 8, 05:05 UTC1h 20m
2026-07-07 UAL573 - Jul 7, 17:15 UTCJul 7, 17:55 UTC40m
2026-07-07 UAL571 AUS → SFO Jul 7, 10:50 UTCJul 7, 15:15 UTC4h 25m
2026-07-07 UAL8103 SFO → ATL Jul 7, 04:35 UTCJul 7, 08:50 UTC4h 15m
2026-07-07 UAL8103 SFO → ATL Jul 7, 04:45 UTCJul 7, 08:48 UTC4h 3m
2026-07-07 UAL1726 - Jul 7, 01:55 UTCJul 7, 02:45 UTC50m
2026-07-06 UAL2010 - Jul 6, 15:30 UTCJul 6, 16:05 UTC35m
2026-07-06 UAL1750 - Jul 6, 11:45 UTCJul 6, 12:25 UTC40m
2026-07-06 UAL1750 OGG → SFO Jul 6, 08:06 UTCJul 6, 12:22 UTC4h 16m
2026-07-06 UAL1749 SFO → OGG Jul 6, 00:06 UTCJul 6, 04:55 UTC4h 49m
2026-07-06 UAL1749 - Jul 6, 00:00 UTCJul 6, 00:30 UTC30m
2026-07-05 UAL2349 LIR → SFO Jul 5, 14:43 UTCJul 5, 21:04 UTC6h 21m
2026-07-04 UAL2349 - Jul 4, 22:50 UTCJul 5, 21:05 UTC22h 15m
2026-07-04 UAL2349 - Jul 4, 20:50 UTCJul 5, 20:45 UTC23h 55m
2026-07-04 UAL2139 - Jul 4, 19:05 UTCJul 5, 18:20 UTC23h 15m
2026-07-04 UAL571 AUS → SFO Jul 4, 13:05 UTCJul 4, 17:25 UTC4h 20m
2026-07-04 UAL8223 - Jul 4, 05:00 UTCJul 4, 09:20 UTC4h 20m
2026-07-03 UAL2010 SFO → SFO Jul 3, 15:45 UTCJul 4, 02:35 UTC10h 50m
2026-07-03 UAL1750 - Jul 3, 12:05 UTCJul 3, 12:45 UTC40m

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 N47369 page for operator, model, and routing details .

Mode-S A5CF8B frequently asked

What is Mode-S code A5CF8B?
A5CF8B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N47369.
Where is Mode-S A5CF8B registered?
Mode-S code A5CF8B 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 A5CF8B broadcasting right now?
Yes. Mode-S A5CF8B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5CF8B, octal 51347613, decimal 10,866,571.
What flights does A5CF8B operate?
Mode-S A5CF8B has broadcast 20 distinct callsigns, including UAL1749, UAL1750, UAL268, UAL206, UAL2010.