Apparatus

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sensors Mode-S transponder

A51EDE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N429UP · BOEING 757-200 · operated by UNITED PARCEL SERVICE CO

Hex
A51EDE
Octal
51217336
Decimal
10,821,342
Country
US
Tail
N429UP
Type
B752
No current signal · last broadcast 28d ago
Flights observed
157
Distinct callsigns
20
Country
US
Last broadcast
28d ago

Last known position

Most recent position reported by Mode-S A51EDE.

Country allocation

The ICAO 24-bit address A51EDE 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
UPS1160 United Parcel Service 5 2026-06-11
UPS9861 United Parcel Service 4 2026-06-11
UPS9748 United Parcel Service 4 2026-05-30
UPS780 United Parcel Service 4 2026-06-05
UPS5961 United Parcel Service 4 2026-04-24
UPS554 United Parcel Service 4 2026-06-03
UPS1387 United Parcel Service 4 2026-06-02
UPS1382 United Parcel Service 4 2026-04-16
UPS9778 United Parcel Service 3 2026-04-24
UPS887 United Parcel Service 3 2026-05-21
UPS781 United Parcel Service 3 2026-06-06
UPS757 United Parcel Service 3 2026-06-12
UPS5062 United Parcel Service 3 2026-04-29
UPS496 United Parcel Service 3 2026-06-03
UPS495 United Parcel Service 3 2026-06-04
UPS2972 United Parcel Service 3 2026-04-23
UPS2784 United Parcel Service 3 2026-05-21
UPS2401 United Parcel Service 3 2026-05-11
UPS1348 United Parcel Service 3 2026-05-29
UPS9821 United Parcel Service 2 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-15 UPS9501 - Jun 15, 12:10 UTCJun 15, 14:34 UTC2h 25m
2026-06-15 UPS9501 SDF → SAT Jun 15, 12:19 UTCJun 15, 14:23 UTC2h 4m
2026-06-13 UPS1357 HSV → SDF Jun 13, 02:55 UTCJun 13, 03:45 UTC50m
2026-06-12 UPS1358 SDF → HSV Jun 12, 09:00 UTCJun 12, 09:40 UTC40m
2026-06-12 UPS1358 SDF → HSV Jun 12, 08:57 UTCJun 12, 09:39 UTC42m
2026-06-12 UPS757 LBB → SDF Jun 12, 02:25 UTCJun 12, 04:25 UTC2h 0m
2026-06-12 UPS757 LBB → SDF Jun 12, 02:17 UTCJun 12, 04:27 UTC2h 10m
2026-06-11 UPS5794 SDF → LBB Jun 11, 20:30 UTCJun 11, 22:40 UTC2h 10m
2026-06-11 UPS9861 BDL → PHL Jun 11, 10:00 UTCJun 11, 11:10 UTC1h 10m
2026-06-11 UPS1160 SDF → PIT Jun 11, 07:55 UTCJun 11, 08:40 UTC45m
2026-06-11 UPS1160 SDF → PIT Jun 11, 06:05 UTCJun 11, 06:55 UTC50m
2026-06-11 UPS1375 TYS → SDF Jun 11, 02:00 UTCJun 11, 02:40 UTC40m
2026-06-10 UPS1376 SDF → TYS Jun 10, 09:20 UTCJun 10, 09:50 UTC30m
2026-06-10 UPS1376 SDF → TYS Jun 10, 09:22 UTCJun 10, 09:53 UTC31m
2026-06-09 UPS513 DSM → SDF Jun 9, 01:55 UTCJun 9, 03:10 UTC1h 15m
2026-06-07 UPS512 SDF → DSM Jun 7, 21:00 UTCJun 7, 22:10 UTC1h 10m
2026-06-07 UPS512 SDF → DSM Jun 7, 20:31 UTCJun 7, 22:10 UTC1h 39m
2026-06-06 UPS781 LRD → SDF Jun 6, 02:55 UTCJun 6, 04:55 UTC2h 0m
2026-06-06 UPS781 LRD → SDF Jun 6, 02:55 UTCJun 6, 04:49 UTC1h 54m
2026-06-06 UPS781 LRD → SDF Jun 6, 00:40 UTCJun 6, 01:10 UTC30m
2026-06-05 UPS780 SAT → LRD Jun 5, 13:00 UTCJun 5, 13:30 UTC30m
2026-06-05 UPS780 SAT → LRD Jun 5, 12:56 UTCJun 5, 13:25 UTC29m
2026-06-05 UPS780 SAT → LRD Jun 5, 09:55 UTCJun 5, 11:10 UTC1h 15m
2026-06-05 UPS780 SAT → LRD Jun 5, 07:10 UTCJun 5, 08:45 UTC1h 35m
2026-06-05 UPS1291 CAE → SDF Jun 5, 01:15 UTCJun 5, 02:10 UTC55m
2026-06-04 UPS1244 RDU → CAE Jun 4, 07:30 UTCJun 4, 07:55 UTC25m
2026-06-04 UPS1244 RDU → CAE Jun 4, 06:00 UTCJun 4, 06:45 UTC45m
2026-06-04 UPS495 OMA → SDF Jun 4, 00:30 UTCJun 4, 02:35 UTC2h 5m
2026-06-03 UPS496 SDF → MSP Jun 3, 11:45 UTCJun 3, 12:45 UTC1h 0m
2026-06-03 UPS554 RFD → MSP Jun 3, 07:10 UTCJun 3, 08:35 UTC1h 25m
2026-06-03 UPS554 RFD → MSP Jun 3, 07:09 UTCJun 3, 08:37 UTC1h 28m
2026-06-03 UPS1441 CLE → SDF Jun 3, 01:45 UTCJun 3, 02:30 UTC45m
2026-06-02 UPS1446 PHL → CLE Jun 2, 08:15 UTCJun 2, 09:05 UTC50m
2026-06-02 UPS1387 MEM → RFD Jun 2, 04:15 UTCJun 2, 05:20 UTC1h 5m
2026-06-02 UPS1387 MEM → RFD Jun 2, 04:10 UTCJun 2, 05:21 UTC1h 11m
2026-05-31 UPS5384 SDF → MEM May 31, 21:35 UTCMay 31, 22:25 UTC50m
2026-05-30 UPS1365 ABY → SDF May 30, 04:15 UTCMay 30, 05:25 UTC1h 10m
2026-05-30 UPS1365 ABY → SDF May 30, 04:12 UTCMay 30, 05:22 UTC1h 10m
2026-05-30 UPS9748 FAT → SNA May 30, 02:25 UTCMay 30, 03:15 UTC50m
2026-05-30 UPS9748 FAT → SNA May 30, 02:12 UTCMay 30, 03:18 UTC1h 6m
2026-05-29 UPS1348 SDF → RSW May 29, 09:35 UTCMay 29, 11:20 UTC1h 45m
2026-05-28 UPS1441 CLE → SDF May 28, 01:50 UTCMay 28, 02:40 UTC50m
2026-05-27 UPS3442 SDF → CLE May 27, 23:55 UTCMay 28, 00:45 UTC50m
2026-05-27 UPS757 LBB → SDF May 27, 02:09 UTCMay 27, 04:14 UTC2h 5m
2026-05-26 UPS5794 SDF → LBB May 26, 20:15 UTCMay 26, 22:39 UTC2h 25m
2026-05-24 UPS9300 EWR → SDF May 24, 12:30 UTCMay 24, 13:25 UTC55m
2026-05-24 UPS9300 EWR → SDF May 24, 12:30 UTCMay 24, 13:29 UTC59m
2026-05-22 UPS1476 RFD → LAN May 22, 08:40 UTCMay 22, 09:10 UTC30m
2026-05-22 UPS1476 RFD → LAN May 22, 08:40 UTCMay 22, 09:15 UTC35m
2026-05-22 UPS783 SAT → RFD May 22, 02:40 UTCMay 22, 04:40 UTC2h 0m

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 N429UP page for operator, model, and routing details .

Mode-S A51EDE frequently asked

What is Mode-S code A51EDE?
A51EDE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N429UP.
Where is Mode-S A51EDE registered?
Mode-S code A51EDE 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 A51EDE broadcasting right now?
No active broadcast right now. Last signal was 28d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A51EDE, octal 51217336, decimal 10,821,342.
What flights does A51EDE operate?
Mode-S A51EDE has broadcast 20 distinct callsigns, including UPS1160, UPS9861, UPS9748, UPS780, UPS5961.