Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A0BACA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N146UP · AIRBUS A-300-600 · operated by UNITED PARCEL SERVICE CO

Hex
A0BACA
Octal
50135312
Decimal
10,533,578
Country
US
Tail
N146UP
Type
A306
No current signal · last broadcast Jul 25, 13:30 UTC
Flights observed
394
Distinct callsigns
20
Country
US
Last broadcast
Jul 25, 13:30 UTC

Last known position

Most recent position reported by Mode-S A0BACA.

Country allocation

The ICAO 24-bit address A0BACA 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
UPS5661 - 11 2026-07-17
UPS907 United Parcel Service 10 2026-06-12
UPS668 - 9 2026-07-17
UPS5683 - 8 2026-07-08
UPS5662 - 8 2026-06-18
UPS914 United Parcel Service 7 2026-06-05
UPS684 - 7 2026-07-08
UPS2020 United Parcel Service 7 2026-05-28
UPS954 United Parcel Service 6 2026-06-10
UPS5605 - 6 2026-07-14
UPS5227 United Parcel Service 6 2026-06-07
UPS1270 United Parcel Service 6 2026-05-15
UPS754 - 5 2026-06-25
UPS701 United Parcel Service 5 2026-07-25
UPS661 - 5 2026-06-19
UPS2307 United Parcel Service 5 2026-05-28
UPS1488 - 5 2026-06-24
UPS1308 United Parcel Service 5 2026-05-28
UPS1269 United Parcel Service 5 2026-05-16
UPS1017 United Parcel Service 5 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 UPS5063 BDL → RFD Jul 25, 11:45 UTCJul 25, 13:30 UTC1h 45m
2026-07-25 UPS5063 BDL → RFD Jul 25, 11:45 UTCJul 25, 13:26 UTC1h 41m
2026-07-25 UPS1066 SDF → BDL Jul 25, 09:00 UTCJul 25, 10:40 UTC1h 40m
2026-07-25 UPS701 MSY → SDF Jul 25, 03:10 UTCJul 25, 04:00 UTC50m
2026-07-25 UPS701 MSY → SDF Jul 25, 01:20 UTCJul 25, 02:05 UTC45m
2026-07-24 UPS5702 SDF → MSY Jul 24, 21:10 UTCJul 24, 22:35 UTC1h 25m
2026-07-24 UPS5031 MHT → SDF Jul 24, 12:50 UTCJul 24, 14:45 UTC1h 55m
2026-07-24 UPS1058 SDF → MHT Jul 24, 09:40 UTCJul 24, 11:15 UTC1h 35m
2026-07-24 UPS635 STL → SDF Jul 24, 03:00 UTCJul 24, 03:40 UTC40m
2026-07-23 UPS636 - Jul 23, 08:55 UTCJul 23, 09:35 UTC40m
2026-07-23 UPS603 ORD → SDF Jul 23, 02:30 UTCJul 23, 03:20 UTC50m
2026-07-22 UPS5906 SDF → ANC Jul 22, 21:20 UTCJul 22, 22:15 UTC55m
2026-07-22 UPS5541 ATL → SDF Jul 22, 13:00 UTCJul 22, 13:55 UTC55m
2026-07-22 UPS605 ORD → SDF Jul 22, 04:10 UTCJul 22, 05:00 UTC50m
2026-07-21 UPS9744 SDF → RFD Jul 21, 09:35 UTCJul 21, 10:50 UTC1h 15m
2026-07-21 UPS1144 PHL → BUF Jul 21, 07:55 UTCJul 21, 08:45 UTC50m
2026-07-21 UPS1017 BOS → PHL Jul 21, 02:50 UTCJul 21, 03:40 UTC50m
2026-07-20 UPS9304 SJU → SDF Jul 20, 23:05 UTCJul 21, 00:55 UTC1h 49m
2026-07-20 UPS9304 SJU → SDF Jul 20, 23:06 UTCJul 21, 00:52 UTC1h 46m
2026-07-17 UPS5661 - Jul 17, 12:45 UTCJul 17, 13:55 UTC1h 10m
2026-07-17 UPS668 - Jul 17, 08:49 UTCJul 17, 09:55 UTC1h 5m
2026-07-17 UPS1143 - Jul 17, 02:54 UTCJul 17, 04:04 UTC1h 10m
2026-07-16 UPS2146 - Jul 16, 20:39 UTCJul 16, 21:50 UTC1h 10m
2026-07-16 UPS5661 - Jul 16, 12:34 UTCJul 16, 13:45 UTC1h 10m
2026-07-16 UPS668 - Jul 16, 09:00 UTCJul 16, 10:04 UTC1h 5m
2026-07-16 UPS1275 - Jul 16, 01:15 UTCJul 16, 02:15 UTC1h 0m
2026-07-15 UPS1276 - Jul 15, 09:30 UTCJul 15, 10:35 UTC1h 5m
2026-07-15 UPS1143 - Jul 15, 02:50 UTCJul 15, 04:00 UTC1h 10m
2026-07-14 UPS2146 - Jul 14, 21:00 UTCJul 14, 22:10 UTC1h 10m
2026-07-14 UPS2146 SDF → BUF Jul 14, 20:57 UTCJul 14, 22:09 UTC1h 12m
2026-07-14 UPS5605 ORD → SDF Jul 14, 12:45 UTCJul 14, 13:30 UTC45m
2026-07-14 UPS5605 ORD → SDF Jul 14, 12:37 UTCJul 14, 13:29 UTC52m
2026-07-14 UPS9744 BUF → ORD Jul 14, 09:30 UTCJul 14, 10:40 UTC1h 10m
2026-07-14 UPS9744 BUF → ORD Jul 14, 09:32 UTCJul 14, 10:32 UTC1h 0m
2026-07-14 UPS1144 PHL → BUF Jul 14, 07:35 UTCJul 14, 08:20 UTC45m
2026-07-14 UPS1144 PHL → BUF Jul 14, 07:40 UTCJul 14, 08:18 UTC38m
2026-07-14 UPS1273 - Jul 14, 02:10 UTCJul 14, 03:05 UTC55m
2026-07-14 UPS1273 RDU → PHL Jul 14, 02:04 UTCJul 14, 03:02 UTC58m
2026-07-10 UPS7833 - Jul 10, 09:30 UTCJul 10, 11:05 UTC1h 35m
2026-07-10 UPS7833 MHT → RDU Jul 10, 09:31 UTCJul 10, 11:03 UTC1h 32m
2026-07-10 UPS1056 - Jul 10, 07:40 UTCJul 10, 08:35 UTC55m
2026-07-10 UPS1056 PHL → MHT Jul 10, 07:44 UTCJul 10, 08:22 UTC38m
2026-07-10 UPS1017 BOS → PHL Jul 10, 02:51 UTCJul 10, 03:59 UTC1h 8m
2026-07-10 UPS1017 BOS → PHL Jul 10, 03:10 UTCJul 10, 04:10 UTC1h 0m
2026-07-09 UPS2014 - Jul 9, 21:20 UTCJul 9, 23:10 UTC1h 50m
2026-07-09 UPS5661 - Jul 9, 12:50 UTCJul 9, 14:00 UTC1h 10m
2026-07-09 UPS5661 MCI → SDF Jul 9, 12:47 UTCJul 9, 13:55 UTC1h 8m
2026-07-09 UPS668 - Jul 9, 09:05 UTCJul 9, 10:30 UTC1h 25m
2026-07-09 UPS668 SDF → MCI Jul 9, 09:01 UTCJul 9, 10:25 UTC1h 24m
2026-07-09 UPS1151 - Jul 9, 01:50 UTCJul 9, 02:45 UTC55m

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 N146UP page for operator, model, and routing details .

Mode-S A0BACA frequently asked

What is Mode-S code A0BACA?
A0BACA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N146UP.
Where is Mode-S A0BACA registered?
Mode-S code A0BACA 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 A0BACA broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 13:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0BACA, octal 50135312, decimal 10,533,578.
What flights does A0BACA operate?
Mode-S A0BACA has broadcast 20 distinct callsigns, including UPS5661, UPS907, UPS668, UPS5683, UPS5662.