Apparatus

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sensors Mode-S transponder

A54C6D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N440UP · BOEING 757-200 · operated by UNITED PARCEL SERVICE CO

Hex
A54C6D
Octal
51246155
Decimal
10,833,005
Country
US
Tail
N440UP
Type
B752
Broadcasting now · callsign UPS1352 · 4,075 ft
Flights observed
155
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Current position

A54C6D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A54C6D 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
UPS780 - 7 2026-06-24
UPS9853 United Parcel Service 6 2026-04-23
UPS1387 - 6 2026-07-02
UPS1016 United Parcel Service 6 2026-04-23
UPS781 - 5 2026-06-25
UPS1382 - 5 2026-07-01
UPS9301 - 4 2026-07-13
UPS1445 - 4 2026-07-07
UPS1244 - 4 2026-06-23
UPS1124 United Parcel Service 4 2026-05-27
UPS947 - 3 2026-06-30
UPS938 - 3 2026-06-19
UPS937 - 3 2026-06-20
UPS913 United Parcel Service 3 2026-04-15
UPS5922 United Parcel Service 3 2026-04-14
UPS5062 United Parcel Service 3 2026-04-21
UPS1468 United Parcel Service 3 2026-06-02
UPS1365 - 3 2026-06-24
UPS1234 - 3 2026-07-07
UPS1222 - 3 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UPS1131 - Jul 14, 03:10 UTCJul 14, 04:00 UTC50m
2026-07-14 UPS1131 BUF → PHL Jul 14, 03:14 UTCJul 14, 04:00 UTC46m
2026-07-14 UPS1131 - Jul 14, 01:55 UTCJul 14, 02:20 UTC25m
2026-07-13 UPS9717 - Jul 13, 23:35 UTCJul 14, 00:15 UTC40m
2026-07-13 UPS9717 PHL → SYR Jul 13, 23:36 UTCJul 14, 00:16 UTC40m
2026-07-13 UPS2188 - Jul 13, 20:05 UTCJul 13, 21:50 UTC1h 45m
2026-07-13 UPS2188 RFD → PHL Jul 13, 20:04 UTCJul 13, 21:51 UTC1h 47m
2026-07-13 UPS9301 - Jul 13, 17:50 UTCJul 13, 18:30 UTC40m
2026-07-13 UPS9301 SDF → RFD Jul 13, 17:51 UTCJul 13, 18:49 UTC58m
2026-07-10 UPS5495 - Jul 10, 10:55 UTCJul 10, 11:50 UTC55m
2026-07-10 UPS5495 LAN → SDF Jul 10, 10:55 UTCJul 10, 11:49 UTC54m
2026-07-10 UPS1476 - Jul 10, 08:20 UTCJul 10, 09:00 UTC40m
2026-07-10 UPS1476 RFD → LAN Jul 10, 08:18 UTCJul 10, 08:58 UTC40m
2026-07-10 UPS673 - Jul 10, 02:50 UTCJul 10, 03:45 UTC55m
2026-07-09 UPS5674 - Jul 9, 21:05 UTCJul 9, 21:50 UTC45m
2026-07-09 UPS5273 - Jul 9, 12:30 UTCJul 9, 13:55 UTC1h 25m
2026-07-09 UPS5273 CLT → RFD Jul 9, 12:29 UTCJul 9, 13:58 UTC1h 29m
2026-07-09 UPS1284 - Jul 9, 07:45 UTCJul 9, 08:50 UTC1h 5m
2026-07-09 UPS1284 PHL → CLT Jul 9, 07:50 UTCJul 9, 08:48 UTC58m
2026-07-09 UPS1153 - Jul 9, 02:05 UTCJul 9, 03:00 UTC55m
2026-07-08 UPS1154 - Jul 8, 07:35 UTCJul 8, 08:20 UTC45m
2026-07-08 UPS1154 PHL → PIT Jul 8, 07:34 UTCJul 8, 08:21 UTC47m
2026-07-08 UPS1233 - Jul 8, 01:45 UTCJul 8, 02:20 UTC35m
2026-07-08 UPS1233 - Jul 8, 00:25 UTCJul 8, 00:45 UTC20m
2026-07-07 UPS1234 - Jul 7, 10:50 UTCJul 7, 11:05 UTC15m
2026-07-07 UPS1234 RIC → ORF Jul 7, 10:47 UTCJul 7, 11:05 UTC18m
2026-07-07 UPS1234 - Jul 7, 07:50 UTCJul 7, 08:25 UTC35m
2026-07-07 UPS1445 - Jul 7, 02:00 UTCJul 7, 03:00 UTC1h 0m
2026-07-03 UPS1446 - Jul 3, 08:10 UTCJul 3, 09:00 UTC50m
2026-07-03 UPS1446 RFD → CLE Jul 3, 08:14 UTCJul 3, 09:18 UTC1h 4m
2026-07-03 UPS633 STL → RFD Jul 3, 03:45 UTCJul 3, 04:40 UTC55m
2026-07-03 UPS633 STL → RFD Jul 3, 03:38 UTCJul 3, 04:27 UTC49m
2026-07-02 UPS634 - Jul 2, 08:35 UTCJul 2, 09:15 UTC40m
2026-07-02 UPS1387 - Jul 2, 03:45 UTCJul 2, 04:40 UTC55m
2026-07-02 UPS1387 MEM → RFD Jul 2, 03:42 UTCJul 2, 04:42 UTC1h 0m
2026-07-01 UPS1382 - Jul 1, 08:15 UTCJul 1, 09:20 UTC1h 5m
2026-07-01 UPS1382 RFD → MEM Jul 1, 08:15 UTCJul 1, 09:23 UTC1h 8m
2026-07-01 UPS1387 - Jul 1, 03:50 UTCJul 1, 04:50 UTC1h 0m
2026-07-01 UPS1387 MEM → RFD Jul 1, 03:46 UTCJul 1, 04:59 UTC1h 13m
2026-06-30 UPS1382 - Jun 30, 08:45 UTCJun 30, 09:50 UTC1h 5m
2026-06-30 UPS1382 RFD → MEM Jun 30, 08:44 UTCJun 30, 09:53 UTC1h 9m
2026-06-30 UPS947 - Jun 30, 02:35 UTCJun 30, 05:50 UTC3h 15m
2026-06-30 UPS947 OAK → RFD Jun 30, 02:27 UTCJun 30, 05:48 UTC3h 21m
2026-06-29 UPS2956 - Jun 29, 20:04 UTCJun 30, 00:00 UTC3h 55m
2026-06-26 UPS7825 - Jun 26, 10:05 UTCJun 26, 10:35 UTC30m
2026-06-26 UPS572 - Jun 26, 08:45 UTCJun 26, 09:14 UTC30m
2026-06-26 UPS1191 - Jun 26, 02:14 UTCJun 26, 04:10 UTC1h 55m
2026-06-25 UPS9733 - Jun 25, 12:10 UTCJun 25, 13:35 UTC1h 25m
2026-06-25 UPS1052 - Jun 25, 10:45 UTCJun 25, 11:19 UTC35m
2026-06-25 UPS1052 - Jun 25, 06:30 UTCJun 25, 08:04 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 N440UP page for operator, model, and routing details .

Mode-S A54C6D frequently asked

What is Mode-S code A54C6D?
A54C6D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N440UP.
Where is Mode-S A54C6D registered?
Mode-S code A54C6D 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 A54C6D broadcasting right now?
Yes. Mode-S A54C6D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A54C6D, octal 51246155, decimal 10,833,005.
What flights does A54C6D operate?
Mode-S A54C6D has broadcast 20 distinct callsigns, including UPS780, UPS9853, UPS1387, UPS1016, UPS781.