Apparatus

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sensors Mode-S transponder

A37B45

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N323UP · BOEING 767-300 · operated by UNITED PARCEL SERVICE CO

Hex
A37B45
Octal
50675505
Decimal
10,713,925
Country
US
Tail
N323UP
Type
B763
No current signal · last broadcast 4d ago
Flights observed
344
Distinct callsigns
20
Country
US
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S A37B45.

Country allocation

The ICAO 24-bit address A37B45 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
UPS1220 United Parcel Service 11 2026-05-30
UPS1219 United Parcel Service 10 2026-06-02
UPS616 - 6 2026-06-18
UPS5933 - 6 2026-07-08
UPS5063 United Parcel Service 6 2026-05-27
UPS1304 - 6 2026-07-10
UPS1301 United Parcel Service 6 2026-06-12
UPS1122 - 6 2026-06-19
UPS2969 United Parcel Service 5 2026-06-05
UPS2968 United Parcel Service 5 2026-06-05
UPS923 United Parcel Service 4 2026-06-06
UPS869 - 4 2026-07-08
UPS810 - 4 2026-07-03
UPS774 - 4 2026-07-07
UPS2949 United Parcel Service 4 2026-06-04
UPS2944 United Parcel Service 4 2026-05-27
UPS2773 - 4 2026-07-07
UPS1476 United Parcel Service 4 2026-05-15
UPS1442 United Parcel Service 4 2026-06-11
UPS1189 - 4 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 UPS1304 - Jul 10, 08:45 UTCJul 10, 09:35 UTC50m
2026-07-10 UPS1304 SDF → ATL Jul 10, 08:30 UTCJul 10, 09:44 UTC1h 14m
2026-07-10 UPS1189 - Jul 10, 02:40 UTCJul 10, 04:00 UTC1h 20m
2026-07-09 UPS2190 - Jul 9, 20:10 UTCJul 10, 00:35 UTC4h 25m
2026-07-09 UPS2841 SLC → ONT Jul 9, 13:24 UTCJul 9, 14:40 UTC1h 16m
2026-07-09 UPS2841 SLC → ONT Jul 9, 13:25 UTCJul 9, 14:45 UTC1h 20m
2026-07-09 UPS844 - Jul 9, 07:55 UTCJul 9, 11:20 UTC3h 25m
2026-07-09 UPS844 SDF → SLC Jul 9, 07:47 UTCJul 9, 11:06 UTC3h 19m
2026-07-09 UPS1189 PHL → SDF Jul 9, 02:40 UTCJul 9, 04:00 UTC1h 20m
2026-07-09 UPS1189 PHL → SDF Jul 9, 02:41 UTCJul 9, 04:02 UTC1h 21m
2026-07-08 UPS5933 - Jul 8, 14:15 UTCJul 8, 18:50 UTC4h 35m
2026-07-08 UPS5933 ONT → PHL Jul 8, 14:11 UTCJul 8, 18:51 UTC4h 40m
2026-07-08 UPS918 - Jul 8, 08:05 UTCJul 8, 11:45 UTC3h 40m
2026-07-08 UPS918 SDF → ONT Jul 8, 07:58 UTCJul 8, 11:40 UTC3h 42m
2026-07-08 UPS869 PHX → SDF Jul 8, 03:10 UTCJul 8, 06:15 UTC3h 5m
2026-07-08 UPS869 PHX → SDF Jul 8, 03:03 UTCJul 8, 06:10 UTC3h 7m
2026-07-07 UPS2862 - Jul 7, 21:40 UTCJul 8, 00:40 UTC3h 0m
2026-07-07 UPS2773 - Jul 7, 13:30 UTCJul 7, 15:10 UTC1h 40m
2026-07-07 UPS2773 IAH → SDF Jul 7, 13:23 UTCJul 7, 15:08 UTC1h 45m
2026-07-07 UPS774 - Jul 7, 09:25 UTCJul 7, 11:05 UTC1h 40m
2026-07-07 UPS774 SDF → IAH Jul 7, 09:22 UTCJul 7, 11:09 UTC1h 47m
2026-07-07 UPS9305 - Jul 7, 05:55 UTCJul 7, 07:50 UTC1h 55m
2026-07-07 UPS9305 MIA → SDF Jul 7, 05:52 UTCJul 7, 07:53 UTC2h 1m
2026-07-04 UPS355 BOG → MIA Jul 4, 07:23 UTCJul 4, 10:34 UTC3h 11m
2026-07-04 UPS355 BOG → MIA Jul 4, 07:23 UTCJul 4, 10:33 UTC3h 10m
2026-07-04 UPS354 - Jul 4, 02:50 UTCJul 4, 03:15 UTC25m
2026-07-04 UPS354 MIA → BOG Jul 4, 02:44 UTCJul 4, 05:54 UTC3h 10m
2026-07-03 UPS2310 - Jul 3, 18:55 UTCJul 3, 23:15 UTC4h 20m
2026-07-03 UPS2310 ONT → MIA Jul 3, 18:50 UTCJul 3, 23:19 UTC4h 29m
2026-07-03 UPS2805 DEN → ONT Jul 3, 13:02 UTCJul 3, 14:59 UTC1h 57m
2026-07-03 UPS2805 DEN → ONT Jul 3, 13:05 UTCJul 3, 15:00 UTC1h 55m
2026-07-03 UPS810 - Jul 3, 07:50 UTCJul 3, 09:50 UTC2h 0m
2026-07-03 UPS810 RFD → DEN Jul 3, 07:48 UTCJul 3, 09:33 UTC1h 45m
2026-07-03 UPS775 - Jul 3, 02:55 UTCJul 3, 04:55 UTC2h 0m
2026-07-03 UPS775 IAH → RFD Jul 3, 02:45 UTCJul 3, 04:45 UTC2h 0m
2026-07-02 UPS5772 - Jul 2, 22:15 UTCJul 2, 23:10 UTC55m
2026-07-02 UPS762 SDF → DFW Jul 2, 07:55 UTCJul 2, 09:30 UTC1h 35m
2026-07-02 UPS762 SDF → DFW Jul 2, 07:54 UTCJul 2, 09:30 UTC1h 36m
2026-07-02 UPS3345 MIA → SDF Jul 2, 02:25 UTCJul 2, 04:20 UTC1h 55m
2026-07-01 UPS5364 - Jul 1, 22:45 UTCJul 2, 00:05 UTC1h 20m
2026-07-01 UPS5364 - Jul 1, 20:10 UTCJul 1, 21:15 UTC1h 5m
2026-07-01 UPS5364 SDF → PNS Jul 1, 20:08 UTCJul 1, 21:27 UTC1h 19m
2026-07-01 UPS2945 - Jul 1, 13:35 UTCJul 1, 17:25 UTC3h 50m
2026-07-01 UPS2945 OAK → SDF Jul 1, 13:21 UTCJul 1, 17:25 UTC4h 4m
2026-07-01 UPS962 - Jul 1, 09:35 UTCJul 1, 10:30 UTC55m
2026-07-01 UPS962 ONT → OAK Jul 1, 09:38 UTCJul 1, 10:32 UTC54m
2026-07-01 UPS983 - Jul 1, 02:50 UTCJul 1, 04:50 UTC2h 0m
2026-07-01 UPS983 BFI → ONT Jul 1, 02:45 UTCJul 1, 04:49 UTC2h 4m
2026-07-01 UPS2986 SDF → BFI Jul 1, 00:20 UTCJul 1, 00:55 UTC35m
2026-07-01 UPS2986 SDF → BFI Jul 1, 00:19 UTCJul 1, 00:51 UTC32m

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 N323UP page for operator, model, and routing details .

Mode-S A37B45 frequently asked

What is Mode-S code A37B45?
A37B45 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N323UP.
Where is Mode-S A37B45 registered?
Mode-S code A37B45 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 A37B45 broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A37B45, octal 50675505, decimal 10,713,925.
What flights does A37B45 operate?
Mode-S A37B45 has broadcast 20 distinct callsigns, including UPS1220, UPS1219, UPS616, UPS5933, UPS5063.