Apparatus

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sensors Mode-S transponder

A3F1C2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N353UP · BOEING 767-300 · operated by UNITED PARCEL SERVICE CO

Hex
A3F1C2
Octal
50770702
Decimal
10,744,258
Country
US
Tail
N353UP
Type
B763
Broadcasting now · callsign UPS1303 · 575 ft
Flights observed
310
Distinct callsigns
20
Country
US
Last broadcast
32m ago

Current position

A3F1C2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A3F1C2 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
UPS167 - 19 2026-06-30
UPS166 United Parcel Service 16 2026-06-30
UPS105 United Parcel Service 15 2026-07-09
UPS196 - 11 2026-07-02
UPS137 - 10 2026-07-04
UPS104 - 10 2026-07-10
UPS195 - 9 2026-07-03
UPS146 - 9 2026-07-05
UPS371 United Parcel Service 7 2026-05-12
UPS138 - 7 2026-07-03
UPS370 United Parcel Service 6 2026-05-12
UPS152 United Parcel Service 6 2026-06-06
UPS1340 United Parcel Service 6 2026-05-12
UPS145 - 5 2026-07-06
UPS136 - 5 2026-07-02
UPS119 - 5 2026-06-28
UPS151 United Parcel Service 4 2026-06-05
UPS147 - 4 2026-07-05
UPS144 - 4 2026-07-06
UPS126 United Parcel Service 4 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UPS1303 - Jul 14, 04:10 UTCJul 14, 04:30 UTC20m
2026-07-14 UPS9300 - Jul 14, 02:25 UTCJul 14, 03:05 UTC40m
2026-07-10 UPS104 - Jul 10, 09:05 UTCJul 10, 10:05 UTC1h 0m
2026-07-09 UPS105 KIX → ANC Jul 9, 22:50 UTCJul 10, 04:40 UTC5h 50m
2026-07-09 UPS105 KIX → ANC Jul 9, 22:41 UTCJul 10, 04:32 UTC5h 51m
2026-07-09 UPS105 KIX → ANC Jul 9, 13:50 UTCJul 9, 14:30 UTC40m
2026-07-09 UPS105 KIX → ANC Jul 9, 13:44 UTCJul 9, 21:30 UTC7h 46m
2026-07-09 UPS105 KIX → ANC Jul 9, 04:50 UTCJul 9, 12:25 UTC7h 35m
2026-07-08 UPS104 - Jul 8, 17:30 UTCJul 8, 19:15 UTC1h 45m
2026-07-08 UPS104 ANC → KIX Jul 8, 17:12 UTCJul 9, 01:54 UTC8h 42m
2026-07-08 UPS104 - Jul 8, 09:00 UTCJul 8, 15:05 UTC6h 5m
2026-07-07 UPS105 KIX → ANC Jul 7, 22:35 UTCJul 8, 04:55 UTC6h 20m
2026-07-07 UPS105 KIX → ANC Jul 7, 22:26 UTCJul 8, 04:50 UTC6h 24m
2026-07-07 UPS105 KIX → ANC Jul 7, 13:50 UTCJul 7, 14:30 UTC40m
2026-07-07 UPS105 KIX → ANC Jul 7, 13:44 UTCJul 7, 21:01 UTC7h 17m
2026-07-07 UPS105 KIX → ANC Jul 7, 04:55 UTCJul 7, 11:15 UTC6h 20m
2026-07-06 UPS127 - Jul 6, 22:45 UTCJul 6, 23:40 UTC55m
2026-07-06 UPS145 - Jul 6, 17:35 UTCJul 6, 17:50 UTC15m
2026-07-06 UPS145 - Jul 6, 15:25 UTCJul 6, 15:55 UTC30m
2026-07-06 UPS144 - Jul 6, 11:50 UTCJul 6, 13:10 UTC1h 20m
2026-07-05 UPS147 - Jul 5, 05:05 UTCJul 5, 05:35 UTC30m
2026-07-05 UPS146 - Jul 5, 02:05 UTCJul 5, 03:40 UTC1h 35m
2026-07-04 UPS146 - Jul 4, 23:20 UTCJul 5, 00:35 UTC1h 15m
2026-07-04 UPS146 - Jul 4, 22:15 UTCJul 4, 22:30 UTC15m
2026-07-04 UPS137 - Jul 4, 19:25 UTCJul 4, 19:40 UTC15m
2026-07-04 UPS137 - Jul 4, 17:50 UTCJul 4, 18:20 UTC30m
2026-07-03 UPS138 - Jul 3, 20:00 UTCJul 3, 21:35 UTC1h 35m
2026-07-03 UPS195 - Jul 3, 16:15 UTCJul 3, 16:25 UTC10m
2026-07-03 UPS195 - Jul 3, 13:20 UTCJul 3, 14:05 UTC45m
2026-07-03 UPS173 - Jul 3, 10:15 UTCJul 3, 10:35 UTC20m
2026-07-03 UPS174 - Jul 3, 03:40 UTCJul 3, 04:00 UTC20m
2026-07-02 UPS196 - Jul 2, 22:30 UTCJul 2, 23:15 UTC45m
2026-07-02 UPS196 - Jul 2, 20:20 UTCJul 2, 20:30 UTC10m
2026-07-02 UPS137 - Jul 2, 16:20 UTCJul 2, 16:45 UTC25m
2026-07-02 UPS136 - Jul 2, 06:45 UTCJul 2, 14:55 UTC8h 10m
2026-07-01 UPS138 - Jul 1, 19:55 UTCJul 2, 04:30 UTC8h 35m
2026-07-01 UPS144 - Jul 1, 11:40 UTCJul 1, 12:50 UTC1h 10m
2026-07-01 UPS147 - Jul 1, 01:10 UTCJul 1, 02:00 UTC50m
2026-07-01 UPS147 - Jul 1, 00:10 UTCJul 1, 00:35 UTC25m
2026-06-30 UPS146 - Jun 30, 20:55 UTCJun 30, 22:25 UTC1h 30m
2026-06-30 UPS146 - Jun 30, 20:10 UTCJun 30, 20:20 UTC10m
2026-06-30 UPS166 HKG → SIN Jun 30, 14:15 UTCJun 30, 14:40 UTC25m
2026-06-30 UPS166 HKG → SIN Jun 30, 11:20 UTCJun 30, 11:45 UTC25m
2026-06-30 UPS166 HKG → SIN Jun 30, 08:35 UTCJun 30, 08:50 UTC15m
2026-06-30 UPS167 - Jun 30, 04:15 UTCJun 30, 04:35 UTC20m
2026-06-30 UPS167 - Jun 30, 01:09 UTCJun 30, 01:30 UTC21m
2026-06-29 UPS167 - Jun 29, 22:39 UTCJun 29, 23:09 UTC30m
2026-06-29 UPS167 - Jun 29, 19:44 UTCJun 29, 20:04 UTC20m
2026-06-29 UPS118 - Jun 29, 17:10 UTCJun 29, 17:24 UTC15m
2026-06-29 UPS118 - Jun 29, 13:00 UTCJun 29, 14:39 UTC1h 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 N353UP page for operator, model, and routing details .

Mode-S A3F1C2 frequently asked

What is Mode-S code A3F1C2?
A3F1C2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N353UP.
Where is Mode-S A3F1C2 registered?
Mode-S code A3F1C2 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 A3F1C2 broadcasting right now?
Yes. Mode-S A3F1C2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3F1C2, octal 50770702, decimal 10,744,258.
What flights does A3F1C2 operate?
Mode-S A3F1C2 has broadcast 20 distinct callsigns, including UPS167, UPS166, UPS105, UPS196, UPS137.