Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3D2E5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N34547 · AIRBUS A-321neo · operated by UNITED AIRLINES INC

Hex
A3D2E5
Octal
50751345
Decimal
10,736,357
Country
US
Tail
N34547
Type
A21N
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
383
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A3D2E5.

Country allocation

The ICAO 24-bit address A3D2E5 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
UAL1834 United Airlines 7 2026-05-13
UAL498 United Airlines 6 2026-05-01
UAL1773 United Airlines 6 2026-05-13
UAL347 United Airlines 5 2026-05-18
UAL2089 - 5 2026-06-24
UAL1775 - 5 2026-06-18
UAL8256 - 4 2026-04-14
UAL695 - 4 2026-06-23
UAL540 United Airlines 4 2026-04-27
UAL459 United Airlines 4 2026-04-29
UAL3873 - 4 2026-07-10
UAL360 United Airlines 4 2026-07-26
UAL2643 - 4 2026-07-05
UAL2618 - 4 2026-06-23
UAL2616 United Airlines 4 2026-05-20
UAL1865 United Airlines 4 2026-05-18
UAL1801 - 4 2026-07-13
UAL1246 - 4 2026-06-15
UAL534 - 3 2026-07-09
UAL405 United Airlines 3 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL360 DFW → EWR Jul 26, 20:00 UTCJul 26, 21:15 UTC1h 15m
2026-07-26 UAL405 RSW → ORD Jul 26, 16:15 UTCJul 26, 18:20 UTC2h 5m
2026-07-26 UAL1217 IAH → BOS Jul 26, 12:35 UTCJul 26, 14:40 UTC2h 5m
2026-07-26 UAL353 SAN → EWR Jul 26, 06:00 UTCJul 26, 09:35 UTC3h 36m
2026-07-26 UAL1262 ORD → BOS Jul 26, 02:20 UTCJul 26, 04:10 UTC1h 50m
2026-07-25 UAL484 DEN → LAS Jul 25, 21:45 UTCJul 25, 23:50 UTC2h 5m
2026-07-25 UAL1599 MSY → IAD Jul 25, 17:56 UTCJul 25, 19:41 UTC1h 45m
2026-07-25 UAL1599 MSY → IAD Jul 25, 17:55 UTCJul 25, 19:45 UTC1h 50m
2026-07-25 UAL647 BOS → DEN Jul 25, 11:50 UTCJul 25, 15:50 UTC4h 0m
2026-07-24 UAL597 EWR → LAS Jul 24, 20:20 UTCJul 24, 23:40 UTC3h 20m
2026-07-24 UAL581 LAX → SFO Jul 24, 16:20 UTCJul 24, 18:25 UTC2h 5m
2026-07-24 UAL1377 CLT → DEN Jul 24, 12:10 UTCJul 24, 14:20 UTC2h 10m
2026-07-24 UAL495 BZN → EWR Jul 24, 02:45 UTCJul 24, 05:55 UTC3h 10m
2026-07-23 UAL421 BDL → IAD Jul 23, 22:00 UTCJul 24, 00:50 UTC2h 50m
2026-07-23 UAL2061 SAN → EWR Jul 23, 18:15 UTCJul 23, 20:05 UTC1h 50m
2026-07-23 UAL1638 ORD → PHL Jul 23, 14:25 UTCJul 23, 16:15 UTC1h 50m
2026-07-23 UAL495 BZN → EWR Jul 23, 02:45 UTCJul 23, 06:15 UTC3h 30m
2026-07-22 UAL421 BDL → IAD Jul 22, 22:00 UTCJul 23, 00:50 UTC2h 50m
2026-07-22 UAL2061 SAN → EWR Jul 22, 18:25 UTCJul 22, 20:15 UTC1h 50m
2026-07-22 UAL1638 ORD → PHL Jul 22, 14:35 UTCJul 22, 16:25 UTC1h 50m
2026-07-22 UAL2806 BOG → EWR Jul 22, 11:20 UTCJul 22, 13:25 UTC2h 5m
2026-07-22 UAL2197 PHL → ORD Jul 22, 00:10 UTCJul 22, 02:20 UTC2h 10m
2026-07-21 UAL2451 KRK → GDN Jul 21, 19:50 UTCJul 21, 21:50 UTC2h 0m
2026-07-21 UAL2466 SJC → DEN Jul 21, 15:10 UTCJul 21, 17:55 UTC2h 45m
2026-07-21 UAL284 - Jul 21, 11:15 UTCJul 21, 13:20 UTC2h 5m
2026-07-21 UAL212 DEN → SBA Jul 21, 01:35 UTCJul 21, 05:10 UTC3h 35m
2026-07-20 UAL8111 - Jul 20, 20:25 UTCJul 21, 00:05 UTC3h 40m
2026-07-20 UAL8111 ORD → LAX Jul 20, 20:03 UTCJul 20, 23:47 UTC3h 44m
2026-07-20 UAL1069 SFO → LAX Jul 20, 13:55 UTCJul 20, 17:40 UTC3h 45m
2026-07-20 UAL1531 ORD → SAN Jul 20, 01:43 UTCJul 20, 04:53 UTC3h 10m
2026-07-20 UAL1531 ORD → SAN Jul 20, 01:30 UTCJul 20, 04:55 UTC3h 25m
2026-07-19 UAL1023 DEN → ORD Jul 19, 21:20 UTCJul 19, 23:20 UTC2h 0m
2026-07-19 UAL2843 FRA → SFO Jul 19, 17:35 UTCJul 19, 19:35 UTC2h 0m
2026-07-19 UAL2666 ORD → DEN Jul 19, 13:58 UTCJul 19, 15:36 UTC1h 38m
2026-07-19 UAL2666 ORD → DEN Jul 19, 13:50 UTCJul 19, 15:40 UTC1h 50m
2026-07-19 UAL1974 ORD → DEN Jul 19, 00:00 UTCJul 19, 02:00 UTC2h 0m
2026-07-18 UAL617 DEN → ORD Jul 18, 19:55 UTCJul 18, 21:45 UTC1h 50m
2026-07-18 UAL1409 - Jul 18, 16:05 UTCJul 18, 18:00 UTC1h 55m
2026-07-18 UAL1799 MIA → EWR Jul 18, 11:45 UTCJul 18, 13:45 UTC2h 0m
2026-07-18 UAL353 SAN → EWR Jul 18, 06:10 UTCJul 18, 09:45 UTC3h 35m
2026-07-18 UAL1262 ORD → BOS Jul 18, 02:14 UTCJul 18, 04:05 UTC1h 51m
2026-07-18 UAL1262 ORD → BOS Jul 18, 02:03 UTCJul 18, 03:57 UTC1h 54m
2026-07-17 UAL2845 MCO → DEN Jul 17, 21:15 UTCJul 18, 00:29 UTC3h 15m
2026-07-17 UAL2292 DEN → MCO Jul 17, 14:44 UTCJul 17, 18:20 UTC3h 36m
2026-07-17 UAL2292 DEN → MCO Jul 17, 14:44 UTCJul 17, 18:19 UTC3h 35m
2026-07-17 UAL2806 - Jul 17, 11:25 UTCJul 17, 13:20 UTC1h 55m
2026-07-17 UAL1517 DFW → ORD Jul 17, 01:09 UTCJul 17, 03:05 UTC1h 55m
2026-07-17 UAL1517 DFW → ORD Jul 17, 00:45 UTCJul 17, 02:45 UTC2h 0m
2026-07-16 UAL793 SFO → ORD Jul 16, 21:05 UTCJul 16, 23:15 UTC2h 10m
2026-07-16 UAL2180 - Jul 16, 18:19 UTCJul 16, 19:30 UTC1h 10m

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 N34547 page for operator, model, and routing details .

Mode-S A3D2E5 frequently asked

What is Mode-S code A3D2E5?
A3D2E5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N34547.
Where is Mode-S A3D2E5 registered?
Mode-S code A3D2E5 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 A3D2E5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3D2E5, octal 50751345, decimal 10,736,357.
What flights does A3D2E5 operate?
Mode-S A3D2E5 has broadcast 20 distinct callsigns, including UAL1834, UAL498, UAL1773, UAL347, UAL2089.