Apparatus

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sensors Mode-S transponder

A5CC15

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N47284 · BOEING 737 MAX 8 · operated by UNITED AIRLINES INC

Hex
A5CC15
Octal
51346025
Decimal
10,865,685
Country
US
Tail
N47284
Type
B38M
Broadcasting now · callsign UAL2083 · 10,700 ft
Flights observed
465
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Current position

A5CC15 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A5CC15 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
UAL1903 - 7 2026-07-08
UAL1698 United Airlines 6 2026-07-01
UAL1629 - 6 2026-07-12
UAL643 United Airlines 5 2026-07-22
UAL2476 - 5 2026-07-19
UAL1632 United Airlines 5 2026-05-21
UAL369 United Airlines 4 2026-07-23
UAL2398 - 4 2026-06-15
UAL2006 - 4 2026-07-08
UAL1530 United Airlines 4 2026-07-25
UAL1514 - 4 2026-06-21
UAL1487 United Airlines 4 2026-05-19
UAL1455 - 4 2026-07-10
UAL1454 - 4 2026-07-10
UAL1271 - 4 2026-07-03
UAL1223 - 4 2026-07-12
UAL628 United Airlines 3 2026-07-22
UAL621 - 3 2026-06-30
UAL573 United Airlines 3 2026-07-21
UAL477 - 3 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL297 SFO → SAN Jul 26, 11:55 UTCJul 26, 21:15 UTC9h 20m
2026-07-25 UAL1530 PHX → SFO Jul 25, 22:10 UTCJul 25, 22:35 UTC25m
2026-07-25 UAL1530 PHX → SFO Jul 25, 22:22 UTCJul 26, 01:44 UTC3h 22m
2026-07-25 UAL1328 ATL → EWR Jul 25, 17:10 UTCJul 25, 20:40 UTC3h 30m
2026-07-25 UAL1328 ATL → EWR Jul 25, 17:09 UTCJul 25, 20:42 UTC3h 33m
2026-07-25 UAL2766 HKG → ORD Jul 25, 03:05 UTCJul 25, 04:20 UTC1h 15m
2026-07-24 UAL1352 IAH → CMH Jul 24, 21:35 UTCJul 25, 01:20 UTC3h 45m
2026-07-24 UAL1320 SFO → ONT Jul 24, 17:40 UTCJul 24, 19:30 UTC1h 50m
2026-07-24 UAL2307 DEN → LIH Jul 24, 12:15 UTCJul 24, 15:45 UTC3h 30m
2026-07-24 UAL1214 DEN → EWR Jul 24, 06:25 UTCJul 24, 09:20 UTC2h 55m
2026-07-24 UAL2436 DEN → MSY Jul 24, 03:15 UTCJul 24, 05:15 UTC2h 0m
2026-07-23 UAL2866 LAX → CLE Jul 23, 23:50 UTCJul 24, 01:35 UTC1h 45m
2026-07-23 UAL2744 MCO → EWR Jul 23, 19:35 UTCJul 23, 21:05 UTC1h 30m
2026-07-23 UAL369 BOS → EWR Jul 23, 12:10 UTCJul 23, 17:15 UTC5h 5m
2026-07-23 UAL369 BOS → EWR Jul 23, 12:09 UTCJul 23, 17:30 UTC5h 21m
2026-07-22 UAL2386 EWR → TPA Jul 22, 21:40 UTCJul 23, 02:10 UTC4h 30m
2026-07-22 UAL574 LAS → SFO Jul 22, 18:55 UTCJul 22, 20:00 UTC1h 5m
2026-07-22 UAL2382 IAH → PHL Jul 22, 16:05 UTCJul 22, 17:20 UTC1h 15m
2026-07-22 UAL643 KOA → SFO Jul 22, 13:10 UTCJul 22, 14:20 UTC1h 10m
2026-07-22 UAL643 KOA → SFO Jul 22, 13:21 UTCJul 22, 14:13 UTC52m
2026-07-22 UAL628 MIA → EWR Jul 22, 03:25 UTCJul 22, 04:10 UTC45m
2026-07-22 UAL628 MIA → EWR Jul 22, 00:03 UTCJul 22, 04:07 UTC4h 4m
2026-07-21 UAL573 DEN → SFO Jul 21, 17:40 UTCJul 21, 18:35 UTC55m
2026-07-21 UAL1597 LAX → SFO Jul 21, 11:35 UTCJul 21, 16:05 UTC4h 30m
2026-07-21 UAL1939 EWR → PBI Jul 21, 04:45 UTCJul 21, 08:50 UTC4h 5m
2026-07-21 UAL2657 IAD → EWR Jul 21, 01:40 UTCJul 21, 02:40 UTC1h 0m
2026-07-20 UAL1350 - Jul 20, 18:45 UTCJul 20, 23:45 UTC5h 0m
2026-07-20 UAL674 - Jul 20, 15:30 UTCJul 20, 17:15 UTC1h 45m
2026-07-20 UAL1108 - Jul 20, 12:40 UTCJul 20, 14:00 UTC1h 20m
2026-07-20 UAL1108 IAD → CHS Jul 20, 12:43 UTCJul 20, 13:56 UTC1h 13m
2026-07-20 UAL3938 SEA → SFO Jul 20, 01:40 UTCJul 20, 02:30 UTC50m
2026-07-20 UAL3938 SEA → SFO Jul 20, 01:43 UTCJul 20, 02:25 UTC42m
2026-07-19 UAL2476 DEN → CLE Jul 19, 22:00 UTCJul 20, 00:20 UTC2h 20m
2026-07-19 UAL2476 DEN → CLE Jul 19, 22:05 UTCJul 20, 00:20 UTC2h 15m
2026-07-19 UAL2663 PSP → SFO Jul 19, 20:15 UTCJul 19, 20:45 UTC30m
2026-07-19 UAL1378 - Jul 19, 17:30 UTCJul 19, 17:40 UTC10m
2026-07-19 UAL690 - Jul 19, 13:05 UTCJul 19, 15:40 UTC2h 35m
2026-07-18 UAL2476 DEN → CLE Jul 18, 20:20 UTCJul 18, 22:45 UTC2h 25m
2026-07-18 UAL1087 SFO → BOS Jul 18, 14:45 UTCJul 18, 18:35 UTC3h 50m
2026-07-18 UAL1087 SFO → BOS Jul 18, 13:50 UTCJul 18, 14:05 UTC15m
2026-07-17 UAL1280 - Jul 17, 22:35 UTCJul 18, 01:15 UTC2h 40m
2026-07-17 UAL1280 IAH → SJO Jul 17, 22:26 UTCJul 18, 01:37 UTC3h 11m
2026-07-17 UAL692 LGA → IAH Jul 17, 16:50 UTCJul 17, 19:39 UTC2h 49m
2026-07-17 UAL692 - Jul 17, 16:40 UTCJul 17, 19:45 UTC3h 5m
2026-07-17 UAL1697 - Jul 17, 12:19 UTCJul 17, 15:15 UTC2h 55m
2026-07-17 UAL1697 IAH → LGA Jul 17, 12:19 UTCJul 17, 15:21 UTC3h 2m
2026-07-17 UAL206 BOG → IAH Jul 17, 05:42 UTCJul 17, 10:08 UTC4h 26m
2026-07-17 UAL206 - Jul 17, 05:39 UTCJul 17, 10:10 UTC4h 30m
2026-07-16 UAL268 EWR → BOG Jul 16, 22:40 UTCJul 17, 03:26 UTC4h 46m
2026-07-16 UAL268 - Jul 16, 22:40 UTCJul 17, 01:39 UTC3h 0m

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 N47284 page for operator, model, and routing details .

Mode-S A5CC15 frequently asked

What is Mode-S code A5CC15?
A5CC15 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N47284.
Where is Mode-S A5CC15 registered?
Mode-S code A5CC15 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 A5CC15 broadcasting right now?
Yes. Mode-S A5CC15 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5CC15, octal 51346025, decimal 10,865,685.
What flights does A5CC15 operate?
Mode-S A5CC15 has broadcast 20 distinct callsigns, including UAL1903, UAL1698, UAL1629, UAL643, UAL2476.