Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A5D319

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N47453 · operated by UNITED AIRLINES INC

Hex
A5D319
Octal
51351431
Decimal
10,867,481
Country
US
Tail
N47453
No current signal · last broadcast 23d ago
Flights observed
401
Distinct callsigns
20
Country
US
Last broadcast
23d ago

Last known position

Most recent position reported by Mode-S A5D319.

Country allocation

The ICAO 24-bit address A5D319 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
UAL1581 - 7 2026-07-08
UAL1572 - 6 2026-07-09
UAL2040 - 5 2026-07-09
UAL1318 United Airlines 5 2026-05-30
UAL744 - 4 2026-07-10
UAL701 - 4 2026-06-17
UAL602 United Airlines 4 2026-06-11
UAL2373 United Airlines 4 2026-07-25
UAL2372 United Airlines 4 2026-07-26
UAL215 United Airlines 4 2026-07-22
UAL1144 United Airlines 4 2026-05-08
UAL1015 - 4 2026-07-09
UAL650 - 3 2026-07-08
UAL636 United Airlines 3 2026-07-22
UAL545 - 3 2026-06-23
UAL356 United Airlines 3 2026-06-11
UAL2755 - 3 2026-07-18
UAL2611 United Airlines 3 2026-06-14
UAL2396 - 3 2026-06-23
UAL2390 United Airlines 3 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2371 DFW → SFO Jul 26, 17:35 UTCJul 26, 20:35 UTC3h 0m
2026-07-26 UAL654 AUS → IAD Jul 26, 13:00 UTCJul 26, 16:10 UTC3h 10m
2026-07-26 UAL2372 LGA → IAH Jul 26, 03:20 UTCJul 26, 04:00 UTC40m
2026-07-25 UAL2372 LGA → IAH Jul 25, 23:10 UTCJul 25, 23:20 UTC10m
2026-07-25 UAL2373 LAX → KOA Jul 25, 16:15 UTCJul 25, 16:45 UTC30m
2026-07-25 UAL2373 LAX → KOA Jul 25, 16:18 UTCJul 25, 21:24 UTC5h 6m
2026-07-25 UAL1251 PHX → SFO Jul 25, 14:00 UTCJul 25, 14:35 UTC35m
2026-07-25 UAL1251 PHX → SFO Jul 25, 09:40 UTCJul 25, 10:00 UTC20m
2026-07-25 UAL2390 DEN → SFO Jul 25, 06:55 UTCJul 25, 07:20 UTC25m
2026-07-25 UAL2390 DEN → SFO Jul 25, 02:05 UTCJul 25, 02:35 UTC30m
2026-07-25 UAL2390 DEN → SFO Jul 25, 02:03 UTCJul 25, 07:21 UTC5h 18m
2026-07-24 UAL1195 DTW → ORD Jul 24, 21:55 UTCJul 24, 23:50 UTC1h 55m
2026-07-24 UAL708 DEN → SFO Jul 24, 18:45 UTCJul 24, 20:00 UTC1h 15m
2026-07-24 UAL2159 DCA → IAH Jul 24, 16:00 UTCJul 24, 16:59 UTC59m
2026-07-24 UAL2159 DCA → IAH Jul 24, 15:50 UTCJul 24, 17:00 UTC1h 10m
2026-07-24 UAL596 IAD → EWR Jul 24, 12:40 UTCJul 24, 14:10 UTC1h 30m
2026-07-24 UAL596 IAD → EWR Jul 24, 12:44 UTCJul 24, 14:05 UTC1h 21m
2026-07-24 UAL679 EWR → LAS Jul 24, 02:35 UTCJul 24, 03:25 UTC50m
2026-07-23 UAL1506 SFO → ORD Jul 23, 20:15 UTCJul 23, 21:15 UTC1h 0m
2026-07-23 UAL1540 SJO → EWR Jul 23, 12:30 UTCJul 23, 17:45 UTC5h 15m
2026-07-23 UAL1230 YVR → SFO Jul 23, 04:40 UTCJul 23, 09:45 UTC5h 5m
2026-07-22 UAL1341 DEN → BOS Jul 22, 23:25 UTCJul 23, 03:00 UTC3h 35m
2026-07-22 UAL1373 ORD → DCA Jul 22, 19:40 UTCJul 22, 21:55 UTC2h 15m
2026-07-22 UAL2225 ALB → ORD Jul 22, 14:20 UTCJul 22, 17:25 UTC3h 5m
2026-07-22 UAL215 IAD → SFO Jul 22, 11:25 UTCJul 22, 12:10 UTC45m
2026-07-22 UAL636 CHS → EWR Jul 22, 03:30 UTCJul 22, 05:00 UTC1h 30m
2026-07-21 UAL1475 EWR → RSW Jul 21, 20:50 UTCJul 21, 23:10 UTC2h 20m
2026-07-21 UAL1475 EWR → RSW Jul 21, 20:09 UTCJul 21, 22:52 UTC2h 43m
2026-07-21 UAL1606 SFO → ORD Jul 21, 16:05 UTCJul 21, 18:30 UTC2h 25m
2026-07-21 UAL1554 SJC → DEN Jul 21, 11:00 UTCJul 21, 13:45 UTC2h 45m
2026-07-20 UAL2618 IAD → SFO Jul 20, 22:35 UTCJul 21, 01:00 UTC2h 24m
2026-07-20 UAL1983 MIA → ORD Jul 20, 17:15 UTCJul 20, 20:05 UTC2h 50m
2026-07-20 UAL1983 MIA → ORD Jul 20, 16:48 UTCJul 20, 19:48 UTC3h 0m
2026-07-20 UAL1358 EWR → ATL Jul 20, 12:35 UTCJul 20, 15:10 UTC2h 35m
2026-07-20 UAL1210 EWR → ATL Jul 20, 00:55 UTCJul 20, 04:00 UTC3h 5m
2026-07-19 UAL1254 PSP → SFO Jul 19, 21:55 UTCJul 19, 23:20 UTC1h 25m
2026-07-19 UAL1254 PSP → SFO Jul 19, 21:54 UTCJul 19, 23:15 UTC1h 21m
2026-07-19 UAL1715 - Jul 19, 18:10 UTCJul 19, 20:10 UTC2h 0m
2026-07-19 UAL2407 TPA → EWR Jul 19, 01:30 UTCJul 19, 04:10 UTC2h 40m
2026-07-18 UAL1216 - Jul 18, 21:55 UTCJul 19, 00:00 UTC2h 5m
2026-07-18 UAL410 - Jul 18, 18:00 UTCJul 18, 20:35 UTC2h 35m
2026-07-18 UAL2168 - Jul 18, 13:10 UTCJul 18, 16:30 UTC3h 20m
2026-07-18 UAL2056 LAS → SFO Jul 18, 06:25 UTCJul 18, 07:15 UTC50m
2026-07-18 UAL2755 - Jul 18, 00:00 UTCJul 18, 02:55 UTC2h 56m
2026-07-17 UAL2755 IAH → LAX Jul 17, 23:54 UTCJul 18, 02:51 UTC2h 57m
2026-07-17 UAL2086 - Jul 17, 19:15 UTCJul 17, 22:15 UTC3h 0m
2026-07-17 UAL2086 LAX → IAH Jul 17, 19:14 UTCJul 17, 22:14 UTC3h 0m
2026-07-17 UAL1734 - Jul 17, 12:25 UTCJul 17, 16:55 UTC4h 30m
2026-07-17 UAL349 - Jul 17, 06:05 UTCJul 17, 10:35 UTC4h 30m
2026-07-17 UAL2755 - Jul 17, 00:14 UTCJul 17, 03:05 UTC2h 50m

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 N47453 page for operator, model, and routing details .

Mode-S A5D319 frequently asked

What is Mode-S code A5D319?
A5D319 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N47453.
Where is Mode-S A5D319 registered?
Mode-S code A5D319 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 A5D319 broadcasting right now?
No active broadcast right now. Last signal was 23d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5D319, octal 51351431, decimal 10,867,481.
What flights does A5D319 operate?
Mode-S A5D319 has broadcast 20 distinct callsigns, including UAL1581, UAL1572, UAL2040, UAL1318, UAL744.