Apparatus

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sensors Mode-S transponder

A48DEA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N39297 · BOEING 737-800 · operated by UMB BANK NA TRUSTEE

Hex
A48DEA
Octal
51106752
Decimal
10,784,234
Country
US
Tail
N39297
Type
B738
No current signal · last broadcast 27d ago
Flights observed
138
Distinct callsigns
20
Country
US
Last broadcast
27d ago

Last known position

Most recent position reported by Mode-S A48DEA.

Country allocation

The ICAO 24-bit address A48DEA 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
UAL33 - 18 2026-06-13
UAL838 - 13 2026-06-14
UAL837 United Airlines 12 2026-06-13
UAL849 United Airlines 11 2026-06-11
UAL32 - 11 2026-06-12
UAL197 United Airlines 10 2026-06-14
UAL196 United Airlines 9 2026-06-11
UAL848 United Airlines 8 2026-05-23
UAL157 United Airlines 7 2026-06-14
UAL873 United Airlines 6 2026-05-21
UAL827 United Airlines 5 2026-05-28
UAL158 United Airlines 5 2026-06-14
UAL864 United Airlines 4 2026-06-02
UAL136 United Airlines 3 2026-06-15
UAL3886 - 2 2026-06-16
UAL3032 United Airlines 2 2026-04-16
UAL193 United Airlines 2 2026-05-01
UAL151 United Airlines 2 2026-05-18
UAL865 United Airlines 1 2026-05-11
UAL3872 United Airlines 1 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-17 UAL3872 ORD → AMA Jun 17, 00:50 UTCJun 17, 05:45 UTC4h 55m
2026-06-16 UAL3871 DEN → ROW Jun 16, 17:55 UTCJun 16, 22:30 UTC4h 36m
2026-06-16 UAL3886 - Jun 16, 03:50 UTCJun 16, 04:15 UTC25m
2026-06-15 UAL3886 GUM → HNL Jun 15, 20:14 UTCJun 16, 04:19 UTC8h 5m
2026-06-15 UAL136 NGO → GUM Jun 15, 02:30 UTCJun 15, 02:44 UTC15m
2026-06-15 UAL137 GUM → NGO Jun 15, 00:29 UTCJun 15, 00:40 UTC10m
2026-06-14 UAL158 PDX → ORD Jun 14, 17:00 UTCJun 14, 17:20 UTC20m
2026-06-14 UAL157 GUM → ROR Jun 14, 15:15 UTCJun 14, 15:35 UTC20m
2026-06-14 UAL157 GUM → ROR Jun 14, 13:57 UTCJun 14, 15:27 UTC1h 30m
2026-06-14 UAL197 NRT → GUM Jun 14, 08:25 UTCJun 14, 09:00 UTC35m
2026-06-14 UAL197 NRT → GUM Jun 14, 08:27 UTCJun 14, 11:35 UTC3h 8m
2026-06-14 UAL838 KHH → NRT Jun 14, 02:08 UTCJun 14, 05:27 UTC3h 19m
2026-06-14 UAL838 KHH → NRT Jun 14, 02:00 UTCJun 14, 05:40 UTC3h 40m
2026-06-13 UAL837 SFO → NRT Jun 13, 09:10 UTCJun 13, 12:45 UTC3h 35m
2026-06-13 UAL33 - Jun 13, 04:50 UTCJun 13, 05:40 UTC50m
2026-06-13 UAL33 CEB → NRT Jun 13, 01:36 UTCJun 13, 05:34 UTC3h 58m
2026-06-12 UAL32 - Jun 12, 10:45 UTCJun 12, 15:00 UTC4h 15m
2026-06-12 UAL32 NRT → CEB Jun 12, 09:57 UTCJun 12, 15:21 UTC5h 24m
2026-06-11 UAL196 GUM → NRT Jun 11, 14:55 UTCJun 12, 06:00 UTC15h 6m
2026-06-11 UAL849 GUM → HND Jun 11, 09:44 UTCJun 11, 12:50 UTC3h 6m
2026-06-11 UAL849 GUM → HND Jun 11, 02:45 UTCJun 11, 12:55 UTC10h 10m
2026-06-10 UAL197 NRT → GUM Jun 10, 08:25 UTCJun 10, 09:05 UTC40m
2026-06-10 UAL838 NRT → SFO Jun 10, 02:05 UTCJun 10, 05:05 UTC3h 0m
2026-06-09 UAL837 SFO → NRT Jun 9, 09:15 UTCJun 9, 12:50 UTC3h 35m
2026-06-09 UAL838 NRT → SFO Jun 9, 02:05 UTCJun 9, 05:20 UTC3h 15m
2026-06-08 UAL837 SFO → NRT Jun 8, 09:05 UTCJun 8, 12:40 UTC3h 35m
2026-06-08 UAL33 NRT → LAX Jun 8, 04:55 UTCJun 8, 05:35 UTC40m
2026-06-08 UAL33 NRT → LAX Jun 8, 01:36 UTCJun 8, 05:30 UTC3h 54m
2026-06-07 UAL32 LAX → NRT Jun 7, 09:10 UTCJun 7, 09:55 UTC45m
2026-06-07 UAL32 LAX → NRT Jun 7, 09:22 UTCJun 7, 13:38 UTC4h 16m
2026-06-07 UAL196 GUM → NRT Jun 7, 02:29 UTCJun 7, 06:02 UTC3h 33m
2026-06-04 UAL197 NRT → GUM Jun 4, 08:05 UTCJun 4, 08:40 UTC35m
2026-06-04 UAL33 NRT → LAX Jun 4, 05:00 UTCJun 4, 05:40 UTC40m
2026-06-02 UAL32 LAX → NRT Jun 2, 10:00 UTCJun 2, 10:45 UTC45m
2026-06-02 UAL864 GUM → NRT Jun 2, 03:12 UTCJun 2, 06:34 UTC3h 22m
2026-06-01 UAL864 GUM → NRT Jun 1, 16:55 UTCJun 2, 06:30 UTC13h 35m
2026-06-01 UAL157 GUM → ROR Jun 1, 15:20 UTCJun 1, 15:30 UTC10m
2026-06-01 UAL157 GUM → ROR Jun 1, 13:57 UTCJun 1, 15:28 UTC1h 31m
2026-05-31 UAL158 PDX → ORD May 31, 17:05 UTCMay 31, 17:25 UTC20m
2026-05-31 UAL157 GUM → ROR May 31, 15:20 UTCMay 31, 15:35 UTC15m
2026-05-31 UAL197 NRT → GUM May 31, 08:25 UTCMay 31, 08:55 UTC30m
2026-05-30 UAL837 SFO → NRT May 30, 09:22 UTCMay 30, 12:27 UTC3h 5m
2026-05-30 UAL837 SFO → NRT May 30, 09:00 UTCMay 30, 12:25 UTC3h 25m
2026-05-30 UAL33 NRT → LAX May 30, 05:05 UTCMay 30, 06:00 UTC55m
2026-05-29 UAL33 NRT → LAX May 29, 09:25 UTCMay 30, 06:00 UTC20h 35m
2026-05-29 UAL196 GUM → NRT May 29, 02:29 UTCMay 29, 05:48 UTC3h 19m
2026-05-28 UAL827 NRT → GUM May 28, 05:15 UTCMay 28, 05:45 UTC30m
2026-05-27 UAL33 NRT → LAX May 27, 05:04 UTCMay 27, 05:55 UTC50m
2026-05-26 UAL33 NRT → LAX May 26, 09:19 UTCMay 27, 05:55 UTC20h 35m
2026-05-26 UAL864 GUM → NRT May 26, 05:45 UTCMay 26, 06:34 UTC50m

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 N39297 page for operator, model, and routing details .

Mode-S A48DEA frequently asked

What is Mode-S code A48DEA?
A48DEA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N39297.
Where is Mode-S A48DEA registered?
Mode-S code A48DEA 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 A48DEA broadcasting right now?
No active broadcast right now. Last signal was 27d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A48DEA, octal 51106752, decimal 10,784,234.
What flights does A48DEA operate?
Mode-S A48DEA has broadcast 20 distinct callsigns, including UAL33, UAL838, UAL837, UAL849, UAL32.