Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3C2D5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N341UP · BOEING 767-300 · operated by UNITED PARCEL SERVICE CO

Hex
A3C2D5
Octal
50741325
Decimal
10,732,245
Country
US
Tail
N341UP
Type
B763
No current signal · last broadcast 10d ago
Flights observed
140
Distinct callsigns
20
Country
US
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S A3C2D5.

Country allocation

The ICAO 24-bit address A3C2D5 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
UPS127 United Parcel Service 6 2026-05-15
UPS166 United Parcel Service 5 2026-05-18
UPS990 United Parcel Service 4 2026-04-14
UPS207 United Parcel Service 4 2026-05-05
UPS146 United Parcel Service 4 2026-05-18
UPS145 - 4 2026-05-19
UPS118 United Parcel Service 4 2026-05-16
UPS947 United Parcel Service 3 2026-04-17
UPS843 United Parcel Service 3 2026-04-30
UPS5981 United Parcel Service 3 2026-04-14
UPS5971 - 3 2026-04-17
UPS5842 United Parcel Service 3 2026-04-29
UPS2946 United Parcel Service 3 2026-04-16
UPS2636 United Parcel Service 3 2026-04-14
UPS208 United Parcel Service 3 2026-05-07
UPS167 United Parcel Service 3 2026-05-16
UPS126 United Parcel Service 3 2026-05-15
UPS1194 United Parcel Service 3 2026-04-28
UPS9746 United Parcel Service 2 2026-04-27
UPS970 United Parcel Service 2 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-20 UPS504 SDF → DSM May 20, 06:15 UTCMay 20, 06:40 UTC25m
2026-05-20 UPS504 SDF → DSM May 20, 04:30 UTCMay 20, 04:55 UTC26m
2026-05-19 UPS196 - May 19, 22:30 UTCMay 19, 23:15 UTC45m
2026-05-19 UPS196 - May 19, 20:15 UTCMay 19, 20:30 UTC15m
2026-05-19 UPS145 - May 19, 17:35 UTCMay 19, 17:55 UTC20m
2026-05-19 UPS145 - May 19, 15:40 UTCMay 19, 16:05 UTC25m
2026-05-19 UPS144 SDF → BUF May 19, 00:20 UTCMay 19, 13:30 UTC13h 10m
2026-05-18 UPS146 SZX → BKK May 18, 21:55 UTCMay 18, 22:30 UTC35m
2026-05-18 UPS146 SZX → BKK May 18, 20:10 UTCMay 18, 20:20 UTC10m
2026-05-18 UPS166 HKG → SIN May 18, 17:40 UTCMay 18, 17:55 UTC15m
2026-05-18 UPS166 HKG → SIN May 18, 14:35 UTCMay 18, 14:50 UTC15m
2026-05-17 UPS169 HKG → HKG May 17, 17:55 UTCMay 17, 20:50 UTC2h 55m
2026-05-17 UPS168 - May 17, 15:45 UTCMay 17, 15:50 UTC5m
2026-05-17 UPS168 - May 17, 07:55 UTCMay 17, 08:30 UTC35m
2026-05-16 UPS167 SIN → SZX May 16, 21:35 UTCMay 16, 21:45 UTC10m
2026-05-16 UPS118 NRT → SZX May 16, 16:55 UTCMay 16, 17:20 UTC25m
2026-05-16 UPS118 NRT → SZX May 16, 13:11 UTCMay 16, 14:25 UTC1h 15m
2026-05-16 UPS117 KIX → NRT May 16, 10:16 UTCMay 16, 11:25 UTC1h 10m
2026-05-15 UPS127 SZX → KIX May 15, 22:50 UTCMay 15, 23:40 UTC50m
2026-05-15 UPS127 SZX → KIX May 15, 20:20 UTCMay 15, 20:30 UTC10m
2026-05-15 UPS126 RFD → JFK May 15, 13:35 UTCMay 15, 14:10 UTC35m
2026-05-15 UPS125 - May 15, 11:20 UTCMay 15, 12:10 UTC50m
2026-05-15 UPS124 KIX → KKJ May 15, 01:25 UTCMay 15, 01:50 UTC25m
2026-05-14 UPS127 SZX → KIX May 14, 23:05 UTCMay 14, 23:55 UTC50m
2026-05-14 UPS127 SZX → KIX May 14, 20:40 UTCMay 14, 20:50 UTC10m
2026-05-14 UPS145 - May 14, 17:20 UTCMay 14, 17:35 UTC15m
2026-05-14 UPS145 - May 14, 15:20 UTCMay 14, 16:00 UTC40m
2026-05-14 UPS144 SDF → BUF May 14, 01:40 UTCMay 14, 13:30 UTC11h 50m
2026-05-13 UPS146 SZX → BKK May 13, 22:55 UTCMay 13, 23:40 UTC45m
2026-05-13 UPS146 SZX → BKK May 13, 21:25 UTCMay 13, 21:35 UTC10m
2026-05-13 UPS126 RFD → JFK May 13, 18:45 UTCMay 13, 19:10 UTC25m
2026-05-13 UPS126 RFD → JFK May 13, 15:20 UTCMay 13, 16:05 UTC45m
2026-05-13 UPS125 - May 13, 11:20 UTCMay 13, 12:05 UTC45m
2026-05-13 UPS124 KIX → KKJ May 13, 01:45 UTCMay 13, 02:10 UTC25m
2026-05-12 UPS127 SZX → KIX May 12, 23:40 UTCMay 13, 00:25 UTC45m
2026-05-12 UPS127 SZX → KIX May 12, 21:20 UTCMay 12, 21:30 UTC10m
2026-05-12 UPS166 HKG → SIN May 12, 18:50 UTCMay 12, 19:10 UTC20m
2026-05-12 UPS166 HKG → SIN May 12, 15:40 UTCMay 12, 15:55 UTC15m
2026-05-12 UPS166 HKG → SIN May 12, 10:25 UTCMay 12, 13:25 UTC3h 0m
2026-05-12 UPS167 SIN → SZX May 12, 04:30 UTCMay 12, 05:00 UTC30m
2026-05-11 UPS167 SIN → SZX May 11, 20:00 UTCMay 11, 20:10 UTC10m
2026-05-11 UPS118 NRT → SZX May 11, 17:30 UTCMay 11, 17:40 UTC10m
2026-05-11 UPS118 NRT → SZX May 11, 13:05 UTCMay 11, 14:30 UTC1h 25m
2026-05-11 UPS117 KIX → NRT May 11, 10:00 UTCMay 11, 11:05 UTC1h 5m
2026-05-10 UPS116 NRT → KIX May 10, 23:19 UTCMay 11, 00:25 UTC1h 5m
2026-05-10 UPS119 SZX → NRT May 10, 20:09 UTCMay 10, 21:30 UTC1h 20m
2026-05-10 UPS119 SZX → NRT May 10, 17:55 UTCMay 10, 18:05 UTC10m
2026-05-09 UPS195 - May 9, 18:00 UTCMay 9, 18:15 UTC15m
2026-05-09 UPS195 - May 9, 15:05 UTCMay 9, 15:50 UTC45m
2026-05-09 UPS174 - May 9, 04:00 UTCMay 9, 04:10 UTC10m

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 N341UP page for operator, model, and routing details .

Mode-S A3C2D5 frequently asked

What is Mode-S code A3C2D5?
A3C2D5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N341UP.
Where is Mode-S A3C2D5 registered?
Mode-S code A3C2D5 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 A3C2D5 broadcasting right now?
No active broadcast right now. Last signal was 10d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3C2D5, octal 50741325, decimal 10,732,245.
What flights does A3C2D5 operate?
Mode-S A3C2D5 has broadcast 20 distinct callsigns, including UPS127, UPS166, UPS990, UPS207, UPS146.