Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A46D8F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N38473 · BOEING 737-900 · operated by UNITED AIRLINES INC

Hex
A46D8F
Octal
51066617
Decimal
10,775,951
Country
US
Tail
N38473
Type
B739
No current signal · last broadcast Jul 26, 19:25 UTC
Flights observed
432
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:25 UTC

Last known position

Most recent position reported by Mode-S A46D8F.

Country allocation

The ICAO 24-bit address A46D8F 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
UAL2163 - 5 2026-07-13
UAL2741 - 4 2026-06-24
UAL2136 United Airlines 4 2026-06-02
UAL1587 United Airlines 4 2026-05-21
UAL1575 United Airlines 4 2026-07-17
UAL1524 United Airlines 4 2026-06-02
UAL1494 United Airlines 4 2026-07-23
UAL1105 - 4 2026-06-30
UAL717 - 3 2026-07-16
UAL706 - 3 2026-06-28
UAL654 United Airlines 3 2026-04-17
UAL583 - 3 2026-07-11
UAL548 - 3 2026-07-16
UAL517 - 3 2026-04-13
UAL2683 United Airlines 3 2026-05-19
UAL2463 - 3 2026-06-29
UAL2431 United Airlines 3 2026-07-16
UAL2322 - 3 2026-06-16
UAL2155 United Airlines 3 2026-06-17
UAL1966 - 3 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1340 FLL → EWR Jul 26, 16:10 UTCJul 26, 19:20 UTC3h 10m
2026-07-26 UAL2438 SYR → IAD Jul 26, 11:19 UTCJul 26, 14:11 UTC2h 52m
2026-07-26 UAL2438 SYR → IAD Jul 26, 11:15 UTCJul 26, 14:10 UTC2h 55m
2026-07-26 UAL554 EWR → DFW Jul 26, 00:10 UTCJul 26, 01:10 UTC1h 0m
2026-07-25 UAL1037 EWR → ATL Jul 25, 18:05 UTCJul 25, 21:05 UTC3h 0m
2026-07-25 UAL1038 CMH → SFO Jul 25, 13:25 UTCJul 25, 16:35 UTC3h 10m
2026-07-25 UAL457 BWI → SFO Jul 25, 02:45 UTCJul 25, 03:30 UTC45m
2026-07-24 UAL254 ORD → BOS Jul 24, 22:40 UTCJul 25, 00:35 UTC1h 55m
2026-07-24 UAL759 RSW → EWR Jul 24, 02:20 UTCJul 24, 03:50 UTC1h 30m
2026-07-23 UAL1494 ANC → SFO Jul 23, 22:50 UTCJul 23, 23:45 UTC55m
2026-07-23 UAL1494 ANC → SFO Jul 23, 22:31 UTCJul 23, 23:45 UTC1h 14m
2026-07-23 UAL1349 RSW → IAD Jul 23, 20:20 UTCJul 23, 21:20 UTC1h 0m
2026-07-23 UAL2370 PHL → ORD Jul 23, 14:05 UTCJul 23, 17:55 UTC3h 50m
2026-07-22 UAL1920 EUG → SFO Jul 22, 21:45 UTCJul 23, 01:40 UTC3h 55m
2026-07-22 UAL1732 PHL → IAH Jul 22, 16:55 UTCJul 22, 19:10 UTC2h 15m
2026-07-22 UAL1076 DEN → SFO Jul 22, 12:55 UTCJul 22, 14:40 UTC1h 45m
2026-07-22 UAL2738 IAD → EWR Jul 22, 02:05 UTCJul 22, 10:25 UTC8h 20m
2026-07-21 UAL533 - Jul 21, 22:35 UTCJul 21, 23:05 UTC30m
2026-07-21 UAL533 TPA → EWR Jul 21, 22:39 UTCJul 21, 23:06 UTC27m
2026-07-21 UAL580 BTV → ORD Jul 21, 19:30 UTCJul 21, 19:55 UTC25m
2026-07-21 UAL2171 GRR → DEN Jul 21, 13:25 UTCJul 21, 17:05 UTC3h 40m
2026-07-21 UAL658 AUS → EWR Jul 21, 01:55 UTCJul 21, 05:35 UTC3h 40m
2026-07-20 UAL1494 ANC → SFO Jul 20, 22:30 UTCJul 20, 23:35 UTC1h 5m
2026-07-20 UAL1494 ANC → SFO Jul 20, 22:31 UTCJul 20, 23:18 UTC47m
2026-07-20 UAL1349 RSW → IAD Jul 20, 20:00 UTCJul 20, 21:00 UTC1h 0m
2026-07-20 UAL1875 EWR → ORD Jul 20, 15:40 UTCJul 20, 17:40 UTC2h 0m
2026-07-20 UAL1246 MSP → EWR Jul 20, 11:05 UTCJul 20, 13:15 UTC2h 10m
2026-07-20 UAL1331 EWR → MSP Jul 20, 04:05 UTCJul 20, 06:30 UTC2h 25m
2026-07-19 UAL8101 TPA → EWR Jul 19, 23:35 UTCJul 20, 02:15 UTC2h 40m
2026-07-19 UAL8101 TPA → EWR Jul 19, 23:08 UTCJul 20, 02:14 UTC3h 6m
2026-07-19 UAL2776 GUM → SFO Jul 19, 19:00 UTCJul 19, 21:50 UTC2h 50m
2026-07-19 UAL1705 ORD → EWR Jul 19, 14:35 UTCJul 19, 16:25 UTC1h 50m
2026-07-19 UAL1012 EWR → BOS Jul 19, 10:55 UTCJul 19, 12:35 UTC1h 40m
2026-07-19 UAL2767 DEN → EWR Jul 19, 02:05 UTCJul 19, 05:10 UTC3h 5m
2026-07-18 UAL2351 SNA → SFO Jul 18, 20:05 UTCJul 18, 23:55 UTC3h 50m
2026-07-18 UAL2352 - Jul 18, 14:40 UTCJul 18, 18:20 UTC3h 40m
2026-07-18 UAL2352 DEN → RTB Jul 18, 14:43 UTCJul 18, 18:40 UTC3h 57m
2026-07-17 UAL2476 - Jul 17, 16:10 UTCJul 17, 18:10 UTC2h 0m
2026-07-17 UAL2142 - Jul 17, 07:14 UTCJul 17, 08:20 UTC1h 5m
2026-07-17 UAL1575 MSP → EWR Jul 17, 00:20 UTCJul 17, 05:30 UTC5h 10m
2026-07-17 UAL1575 MSP → EWR Jul 17, 00:04 UTCJul 17, 00:10 UTC5m
2026-07-16 UAL2431 FLL → EWR Jul 16, 16:05 UTCJul 16, 21:05 UTC5h 0m
2026-07-16 UAL717 - Jul 16, 13:10 UTCJul 16, 14:20 UTC1h 10m
2026-07-16 UAL717 MFR → SFO Jul 16, 13:15 UTCJul 16, 14:14 UTC59m
2026-07-16 UAL548 - Jul 16, 05:10 UTCJul 16, 05:55 UTC45m
2026-07-16 UAL548 SFO → MFR Jul 16, 04:49 UTCJul 16, 05:52 UTC1h 3m
2026-07-15 UAL285 ATL → SFO Jul 15, 22:25 UTCJul 16, 03:05 UTC4h 40m
2026-07-15 UAL702 SFO → ATL Jul 15, 16:05 UTCJul 15, 20:25 UTC4h 20m
2026-07-15 UAL717 MFR → SFO Jul 15, 13:10 UTCJul 15, 14:10 UTC1h 0m
2026-07-15 UAL548 SFO → MFR Jul 15, 04:55 UTCJul 15, 05:45 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 N38473 page for operator, model, and routing details .

Mode-S A46D8F frequently asked

What is Mode-S code A46D8F?
A46D8F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N38473.
Where is Mode-S A46D8F registered?
Mode-S code A46D8F 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 A46D8F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A46D8F, octal 51066617, decimal 10,775,951.
What flights does A46D8F operate?
Mode-S A46D8F has broadcast 20 distinct callsigns, including UAL2163, UAL2741, UAL2136, UAL1587, UAL1575.