Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A5D28E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N47414 · BOEING 737-900 · operated by UNITED AIRLINES INC

Hex
A5D28E
Octal
51351216
Decimal
10,867,342
Country
US
Tail
N47414
Type
B739
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
451
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S A5D28E.

Country allocation

The ICAO 24-bit address A5D28E 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
UAL733 United Airlines 5 2026-07-24
UAL1715 United Airlines 5 2026-05-17
UAL2858 United Airlines 4 2026-05-04
UAL2690 United Airlines 4 2026-04-27
UAL2627 United Airlines 4 2026-07-18
UAL1999 United Airlines 4 2026-04-21
UAL1992 - 4 2026-06-21
UAL1832 United Airlines 4 2026-05-14
UAL1831 United Airlines 4 2026-05-15
UAL759 - 3 2026-06-19
UAL577 United Airlines 3 2026-05-18
UAL533 United Airlines 3 2026-05-12
UAL2747 - 3 2026-07-12
UAL2461 United Airlines 3 2026-05-02
UAL2425 United Airlines 3 2026-04-18
UAL2375 United Airlines 3 2026-04-14
UAL2266 United Airlines 3 2026-05-11
UAL2226 - 3 2026-07-12
UAL2194 - 3 2026-06-22
UAL2093 - 3 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2366 SFO → LAS Jul 26, 18:30 UTCJul 26, 21:00 UTC2h 30m
2026-07-26 UAL2608 LAS → IAH Jul 26, 13:30 UTCJul 26, 16:15 UTC2h 45m
2026-07-25 UAL1149 EWR → SRQ Jul 25, 21:00 UTCJul 26, 01:40 UTC4h 40m
2026-07-25 UAL1340 FLL → EWR Jul 25, 16:15 UTCJul 25, 19:10 UTC2h 55m
2026-07-25 UAL2438 SYR → IAD Jul 25, 11:25 UTCJul 25, 14:20 UTC2h 55m
2026-07-24 UAL733 SFO → SAN Jul 24, 20:05 UTCJul 25, 00:30 UTC4h 25m
2026-07-24 UAL1292 MSN → ORD Jul 24, 14:05 UTCJul 24, 18:10 UTC4h 5m
2026-07-24 UAL1778 EWR → SAT Jul 24, 10:35 UTCJul 24, 12:15 UTC1h 40m
2026-07-24 UAL1568 ORD → SFO Jul 24, 00:15 UTCJul 24, 01:25 UTC1h 10m
2026-07-23 UAL1623 EWR → AUS Jul 23, 19:55 UTCJul 23, 21:55 UTC2h 0m
2026-07-23 UAL1623 EWR → AUS Jul 23, 17:40 UTCJul 23, 18:10 UTC30m
2026-07-23 UAL728 AUS → EWR Jul 23, 13:20 UTCJul 23, 16:00 UTC2h 40m
2026-07-23 UAL8145 TPA → EWR Jul 23, 03:10 UTCJul 23, 05:25 UTC2h 15m
2026-07-23 UAL1961 LAS → IAD Jul 23, 01:30 UTCJul 23, 01:50 UTC20m
2026-07-22 UAL1961 LAS → IAD Jul 22, 20:05 UTCJul 22, 21:45 UTC1h 40m
2026-07-22 UAL2145 MFR → SFO Jul 22, 14:45 UTCJul 22, 18:40 UTC3h 55m
2026-07-22 UAL490 YYZ → ORD Jul 22, 11:25 UTCJul 22, 12:35 UTC1h 10m
2026-07-20 UAL2725 PDX → SFO Jul 20, 21:30 UTCJul 20, 23:55 UTC2h 24m
2026-07-20 UAL1706 ITO → LAX Jul 20, 17:30 UTCJul 20, 19:45 UTC2h 15m
2026-07-20 UAL332 SFO → LAX Jul 20, 13:05 UTCJul 20, 16:00 UTC2h 55m
2026-07-20 UAL332 SFO → LAX Jul 20, 12:54 UTCJul 20, 15:57 UTC3h 3m
2026-07-20 UAL733 - Jul 20, 01:00 UTCJul 20, 01:05 UTC5m
2026-07-19 UAL733 - Jul 19, 20:15 UTCJul 20, 01:05 UTC4h 50m
2026-07-19 UAL733 YVR → EWR Jul 19, 20:02 UTCJul 20, 00:42 UTC4h 40m
2026-07-19 UAL1292 MSN → ORD Jul 19, 14:40 UTCJul 19, 18:40 UTC4h 0m
2026-07-19 UAL307 MSP → ORD Jul 19, 11:35 UTCJul 19, 12:25 UTC50m
2026-07-19 UAL8170 ORD → MSP Jul 19, 02:45 UTCJul 19, 03:45 UTC1h 0m
2026-07-18 UAL2627 EWR → ORD Jul 18, 22:40 UTCJul 19, 01:15 UTC2h 35m
2026-07-18 UAL2627 EWR → ORD Jul 18, 22:17 UTCJul 19, 00:52 UTC2h 35m
2026-07-18 UAL2643 DEN → BOS Jul 18, 17:25 UTCJul 18, 20:35 UTC3h 10m
2026-07-18 UAL2446 - Jul 18, 13:45 UTCJul 18, 15:35 UTC1h 50m
2026-07-18 UAL2028 PHX → DEN Jul 18, 04:20 UTCJul 18, 06:05 UTC1h 45m
2026-07-18 UAL1291 LAS → DEN Jul 18, 01:34 UTCJul 18, 03:05 UTC1h 31m
2026-07-17 UAL716 CHS → DEN Jul 17, 22:29 UTCJul 17, 23:50 UTC1h 20m
2026-07-17 UAL2793 PDX → DEN Jul 17, 18:15 UTCJul 17, 20:20 UTC2h 5m
2026-07-17 UAL1247 DEN → PDX Jul 17, 14:20 UTCJul 17, 16:24 UTC2h 5m
2026-07-17 UAL1247 DEN → PDX Jul 17, 14:23 UTCJul 17, 16:24 UTC2h 1m
2026-07-17 UAL1442 - Jul 17, 11:15 UTCJul 17, 12:25 UTC1h 10m
2026-07-17 UAL1787 - Jul 17, 03:20 UTCJul 17, 04:20 UTC1h 0m
2026-07-16 UAL682 - Jul 16, 23:15 UTCJul 17, 01:25 UTC2h 10m
2026-07-16 UAL1302 DEN → SAN Jul 16, 20:00 UTCJul 16, 21:55 UTC1h 55m
2026-07-16 UAL597 - Jul 16, 16:30 UTCJul 16, 17:54 UTC1h 25m
2026-07-16 UAL2347 HAF → PHX Jul 16, 02:35 UTCJul 16, 04:05 UTC1h 30m
2026-07-15 UAL1799 LAS → SFO Jul 15, 21:20 UTCJul 15, 22:25 UTC1h 5m
2026-07-15 UAL611 SFO → LAS Jul 15, 18:30 UTCJul 15, 19:35 UTC1h 5m
2026-07-15 UAL2322 YVR → SFO Jul 15, 14:45 UTCJul 15, 16:55 UTC2h 10m
2026-07-15 UAL2191 - Jul 15, 03:05 UTCJul 15, 05:10 UTC2h 5m
2026-07-14 UAL1743 - Jul 14, 22:40 UTCJul 15, 01:25 UTC2h 44m
2026-07-14 UAL334 - Jul 14, 20:05 UTCJul 14, 20:45 UTC40m
2026-07-14 UAL1859 - Jul 14, 18:20 UTCJul 14, 18:55 UTC35m

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 N47414 page for operator, model, and routing details .

Mode-S A5D28E frequently asked

What is Mode-S code A5D28E?
A5D28E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N47414.
Where is Mode-S A5D28E registered?
Mode-S code A5D28E 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 A5D28E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5D28E, octal 51351216, decimal 10,867,342.
What flights does A5D28E operate?
Mode-S A5D28E has broadcast 20 distinct callsigns, including UAL733, UAL1715, UAL2858, UAL2690, UAL2627.