Apparatus

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sensors Mode-S transponder

A38A21

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N327UP · BOEING 767-300 · operated by C C & E I LLC

Hex
A38A21
Octal
50705041
Decimal
10,717,729
Country
US
Tail
N327UP
Type
B763
No current signal · last broadcast Jul 24, 09:25 UTC
Flights observed
395
Distinct callsigns
20
Country
US
Last broadcast
Jul 24, 09:25 UTC

Last known position

Most recent position reported by Mode-S A38A21.

Country allocation

The ICAO 24-bit address A38A21 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
UPS118 - 18 2026-07-10
UPS119 - 17 2026-07-09
UPS126 - 16 2026-07-08
UPS127 - 15 2026-07-07
UPS146 - 13 2026-07-02
UPS167 - 12 2026-07-03
UPS232 United Parcel Service 9 2026-05-27
UPS166 United Parcel Service 9 2026-07-04
UPS145 - 9 2026-07-03
UPS237 United Parcel Service 8 2026-05-27
UPS208 United Parcel Service 8 2026-05-22
UPS147 - 8 2026-07-03
UPS125 - 8 2026-07-08
UPS124 - 8 2026-07-08
UPS104 United Parcel Service 8 2026-05-29
UPS196 - 7 2026-07-10
UPS144 - 7 2026-07-03
UPS26 - 6 2026-07-11
UPS233 United Parcel Service 6 2026-05-18
UPS219 United Parcel Service 6 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 UPS617 RFD → SDF Jul 24, 08:40 UTCJul 24, 09:25 UTC45m
2026-07-23 UPS2029 BDL → RFD Jul 23, 12:05 UTCJul 23, 14:00 UTC1h 55m
2026-07-23 UPS1066 SDF → BDL Jul 23, 08:10 UTCJul 23, 09:35 UTC1h 25m
2026-07-23 UPS1083 EWR → SDF Jul 23, 02:15 UTCJul 23, 04:00 UTC1h 45m
2026-07-22 UPS2076 SDF → EWR Jul 22, 20:15 UTCJul 22, 21:55 UTC1h 40m
2026-07-22 UPS1219 IAD → SDF Jul 22, 03:15 UTCJul 22, 04:40 UTC1h 25m
2026-07-21 UPS3220 SDF → IAD Jul 21, 23:45 UTCJul 22, 01:05 UTC1h 20m
2026-07-21 UPS891 LAS → SDF Jul 21, 02:05 UTCJul 21, 05:15 UTC3h 10m
2026-07-18 UPS892 - Jul 18, 09:55 UTCJul 18, 13:05 UTC3h 10m
2026-07-18 UPS1333 - Jul 18, 02:40 UTCJul 18, 04:45 UTC2h 6m
2026-07-17 UPS1334 - Jul 17, 08:59 UTCJul 17, 10:55 UTC1h 55m
2026-07-17 UPS1063 - Jul 17, 01:49 UTCJul 17, 03:34 UTC1h 45m
2026-07-16 UPS5066 - Jul 16, 21:00 UTCJul 16, 22:40 UTC1h 40m
2026-07-16 UPS2085 EWR → SDF Jul 16, 14:05 UTCJul 16, 15:35 UTC1h 30m
2026-07-16 UPS1096 - Jul 16, 08:05 UTCJul 16, 09:50 UTC1h 45m
2026-07-16 UPS1083 - Jul 16, 03:40 UTCJul 16, 05:10 UTC1h 30m
2026-07-16 UPS2076 - Jul 16, 00:20 UTCJul 16, 00:50 UTC30m
2026-07-16 UPS2076 PHL → PHL Jul 16, 00:10 UTCJul 16, 00:15 UTC5m
2026-07-15 UPS2076 - Jul 15, 20:15 UTCJul 15, 22:45 UTC2h 30m
2026-07-15 UPS2325 - Jul 15, 10:55 UTCJul 15, 12:25 UTC1h 30m
2026-07-15 UPS1336 - Jul 15, 07:00 UTCJul 15, 08:30 UTC1h 30m
2026-07-15 UPS1151 - Jul 15, 01:55 UTCJul 15, 02:45 UTC50m
2026-07-14 UPS5152 - Jul 14, 21:25 UTCJul 14, 22:25 UTC1h 0m
2026-07-14 UPS5152 SDF → PIT Jul 14, 21:24 UTCJul 14, 22:25 UTC1h 1m
2026-07-14 UPS5909 - Jul 14, 12:30 UTCJul 14, 16:15 UTC3h 45m
2026-07-14 UPS5909 ONT → SDF Jul 14, 12:33 UTCJul 14, 16:20 UTC3h 47m
2026-07-14 UPS761 DFW → ONT Jul 14, 02:41 UTCJul 14, 05:18 UTC2h 37m
2026-07-14 UPS761 DFW → ONT Jul 14, 02:55 UTCJul 14, 05:20 UTC2h 25m
2026-07-13 UPS5780 SAT → DFW Jul 13, 03:01 UTCJul 13, 04:30 UTC1h 30m
2026-07-12 UPS5780 - Jul 12, 19:40 UTCJul 12, 21:45 UTC2h 5m
2026-07-12 UPS6031 ANC → SDF Jul 12, 06:45 UTCJul 12, 12:50 UTC6h 5m
2026-07-11 UPS26 - Jul 11, 13:25 UTCJul 11, 21:10 UTC7h 45m
2026-07-10 UPS196 - Jul 10, 22:25 UTCJul 10, 23:00 UTC35m
2026-07-10 UPS196 - Jul 10, 20:05 UTCJul 10, 20:15 UTC10m
2026-07-10 UPS118 - Jul 10, 16:25 UTCJul 10, 16:50 UTC25m
2026-07-10 UPS118 - Jul 10, 12:45 UTCJul 10, 14:25 UTC1h 40m
2026-07-09 UPS119 - Jul 9, 22:15 UTCJul 9, 23:55 UTC1h 40m
2026-07-09 UPS119 - Jul 9, 20:05 UTCJul 9, 20:15 UTC10m
2026-07-09 UPS118 - Jul 9, 16:50 UTCJul 9, 17:05 UTC15m
2026-07-09 UPS118 - Jul 9, 12:40 UTCJul 9, 14:20 UTC1h 40m
2026-07-08 UPS119 - Jul 8, 22:10 UTCJul 8, 23:55 UTC1h 45m
2026-07-08 UPS119 - Jul 8, 20:05 UTCJul 8, 20:15 UTC10m
2026-07-08 UPS126 - Jul 8, 17:00 UTCJul 8, 17:15 UTC15m
2026-07-08 UPS126 - Jul 8, 13:40 UTCJul 8, 14:35 UTC55m
2026-07-08 UPS125 - Jul 8, 11:20 UTCJul 8, 12:05 UTC45m
2026-07-08 UPS124 - Jul 8, 00:25 UTCJul 8, 00:55 UTC30m
2026-07-07 UPS127 - Jul 7, 22:20 UTCJul 7, 23:20 UTC1h 0m
2026-07-07 UPS127 - Jul 7, 20:15 UTCJul 7, 20:25 UTC10m
2026-07-07 UPS118 - Jul 7, 16:35 UTCJul 7, 16:50 UTC15m
2026-07-07 UPS118 - Jul 7, 12:50 UTCJul 7, 14:25 UTC1h 35m

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 N327UP page for operator, model, and routing details .

Mode-S A38A21 frequently asked

What is Mode-S code A38A21?
A38A21 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N327UP.
Where is Mode-S A38A21 registered?
Mode-S code A38A21 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 A38A21 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 09:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A38A21, octal 50705041, decimal 10,717,729.
What flights does A38A21 operate?
Mode-S A38A21 has broadcast 20 distinct callsigns, including UPS118, UPS119, UPS126, UPS127, UPS146.