Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A46D47

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N38451 · BOEING 737-900 · operated by UNITED AIRLINES INC

Hex
A46D47
Octal
51066507
Decimal
10,775,879
Country
US
Tail
N38451
Type
B739
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
447
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S A46D47.

Country allocation

The ICAO 24-bit address A46D47 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
UAL469 United Airlines 5 2026-07-24
UAL2608 - 5 2026-07-09
UAL2331 United Airlines 5 2026-07-25
UAL583 - 4 2026-06-27
UAL2681 - 4 2026-07-17
UAL2053 - 4 2026-07-01
UAL1893 - 4 2026-07-25
UAL1831 United Airlines 4 2026-07-20
UAL1615 - 4 2026-07-07
UAL785 United Airlines 3 2026-05-27
UAL659 - 3 2026-06-23
UAL619 - 3 2026-07-13
UAL367 United Airlines 3 2026-05-25
UAL357 United Airlines 3 2026-07-19
UAL314 United Airlines 3 2026-05-15
UAL2858 United Airlines 3 2026-05-08
UAL2737 - 3 2026-04-13
UAL2645 United Airlines 3 2026-06-27
UAL2497 - 3 2026-07-10
UAL2309 United Airlines 3 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1126 LAS → EWR Jul 26, 18:45 UTCJul 26, 21:45 UTC3h 0m
2026-07-26 UAL1101 MCO → EWR Jul 26, 14:20 UTCJul 26, 17:20 UTC3h 0m
2026-07-26 UAL2019 OGG → SFO Jul 26, 03:20 UTCJul 26, 05:05 UTC1h 45m
2026-07-26 UAL2019 OGG → SFO Jul 26, 03:05 UTCJul 26, 05:10 UTC2h 5m
2026-07-25 UAL2251 EWR → MEX Jul 25, 21:25 UTCJul 26, 01:25 UTC4h 0m
2026-07-25 UAL2331 IAD → RDU Jul 25, 17:30 UTCJul 25, 19:05 UTC1h 35m
2026-07-25 UAL1893 - Jul 25, 13:50 UTCJul 25, 15:30 UTC1h 40m
2026-07-25 UAL2463 ORD → MCO Jul 25, 02:05 UTCJul 25, 03:55 UTC1h 50m
2026-07-24 UAL1635 LAX → IAD Jul 24, 20:10 UTCJul 25, 00:40 UTC4h 30m
2026-07-24 UAL469 IAH → ORD Jul 24, 15:15 UTCJul 24, 17:45 UTC2h 30m
2026-07-24 UAL469 IAH → ORD Jul 24, 15:13 UTCJul 24, 18:00 UTC2h 47m
2026-07-24 UAL2419 MFR → SFO Jul 24, 03:40 UTCJul 24, 05:45 UTC2h 5m
2026-07-23 UAL1417 DEN → RDU Jul 23, 21:50 UTCJul 24, 02:10 UTC4h 20m
2026-07-23 UAL1417 DEN → RDU Jul 23, 21:28 UTCJul 24, 01:53 UTC4h 25m
2026-07-23 UAL1706 ITO → LAX Jul 23, 17:40 UTCJul 23, 20:05 UTC2h 25m
2026-07-23 UAL1706 ITO → LAX Jul 23, 17:27 UTCJul 23, 20:03 UTC2h 36m
2026-07-23 UAL2215 FLL → EWR Jul 23, 00:20 UTCJul 23, 02:15 UTC1h 55m
2026-07-22 UAL496 EWR → SFO Jul 22, 20:10 UTCJul 22, 22:15 UTC2h 5m
2026-07-22 UAL1416 LAX → SFO Jul 22, 15:40 UTCJul 22, 18:35 UTC2h 55m
2026-07-21 UAL3914 CDG → SFO Jul 21, 20:35 UTCJul 21, 23:00 UTC2h 25m
2026-07-21 UAL1796 EWR → ORD Jul 21, 01:15 UTCJul 21, 06:45 UTC5h 30m
2026-07-20 UAL1831 RNO → SFO Jul 20, 22:35 UTCJul 20, 23:45 UTC1h 10m
2026-07-20 UAL1992 - Jul 20, 19:40 UTCJul 20, 20:25 UTC45m
2026-07-20 UAL1498 IAD → EWR Jul 20, 16:45 UTCJul 20, 17:35 UTC50m
2026-07-20 UAL2331 TPA → IAD Jul 20, 13:15 UTCJul 20, 15:00 UTC1h 45m
2026-07-19 UAL1140 IAD → TPA Jul 19, 22:45 UTCJul 20, 00:40 UTC1h 55m
2026-07-19 UAL2250 - Jul 19, 17:55 UTCJul 19, 21:15 UTC3h 20m
2026-07-19 UAL1789 IAD → SAT Jul 19, 13:05 UTCJul 19, 15:55 UTC2h 50m
2026-07-19 UAL357 IAD → SFO Jul 19, 05:15 UTCJul 19, 09:45 UTC4h 30m
2026-07-19 UAL357 IAD → SFO Jul 19, 05:22 UTCJul 19, 09:51 UTC4h 29m
2026-07-19 UAL1302 - Jul 19, 01:40 UTCJul 19, 02:45 UTC1h 5m
2026-07-18 UAL1281 DEN → SAN Jul 18, 22:10 UTCJul 19, 00:15 UTC2h 5m
2026-07-18 UAL1587 IAD → DEN Jul 18, 17:20 UTCJul 18, 20:30 UTC3h 10m
2026-07-18 UAL2066 ORD → PHL Jul 18, 15:20 UTCJul 18, 15:55 UTC35m
2026-07-18 UAL2112 JAX → EWR Jul 18, 13:20 UTCJul 18, 13:50 UTC30m
2026-07-18 UAL8147 SFO → IAD Jul 18, 06:10 UTCJul 18, 11:00 UTC4h 50m
2026-07-17 UAL1575 MSP → EWR Jul 17, 22:45 UTCJul 18, 04:55 UTC6h 11m
2026-07-17 UAL2431 FLL → EWR Jul 17, 16:04 UTCJul 17, 21:15 UTC5h 10m
2026-07-17 UAL717 MFR → SFO Jul 17, 13:10 UTCJul 17, 14:15 UTC1h 5m
2026-07-17 UAL548 - Jul 17, 05:25 UTCJul 17, 06:20 UTC55m
2026-07-17 UAL2681 - Jul 17, 02:50 UTCJul 17, 03:45 UTC55m
2026-07-17 UAL2681 LAX → SFO Jul 17, 02:48 UTCJul 17, 03:39 UTC51m
2026-07-14 UAL8179 - Jul 14, 07:05 UTCJul 14, 08:05 UTC1h 0m
2026-07-14 UAL2681 - Jul 14, 04:45 UTCJul 14, 05:40 UTC55m
2026-07-13 UAL679 - Jul 13, 20:00 UTCJul 14, 00:05 UTC4h 5m
2026-07-13 UAL619 DEN → CLE Jul 13, 16:00 UTCJul 13, 18:30 UTC2h 30m
2026-07-13 UAL1010 - Jul 13, 12:10 UTCJul 13, 14:05 UTC1h 55m
2026-07-13 UAL1385 - Jul 13, 02:50 UTCJul 13, 07:15 UTC4h 25m
2026-07-12 UAL1635 - Jul 12, 19:55 UTCJul 13, 00:30 UTC4h 35m
2026-07-12 UAL469 - Jul 12, 15:20 UTCJul 12, 18:01 UTC2h 40m

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 N38451 page for operator, model, and routing details .

Mode-S A46D47 frequently asked

What is Mode-S code A46D47?
A46D47 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N38451.
Where is Mode-S A46D47 registered?
Mode-S code A46D47 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 A46D47 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A46D47, octal 51066507, decimal 10,775,879.
What flights does A46D47 operate?
Mode-S A46D47 has broadcast 20 distinct callsigns, including UAL469, UAL2608, UAL2331, UAL583, UAL2681.