Apparatus

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sensors Mode-S transponder

A56DDC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N449UP · BOEING 757-200 · operated by UNITED PARCEL SERVICE CO

Hex
A56DDC
Octal
51266734
Decimal
10,841,564
Country
US
Tail
N449UP
Type
B752
No current signal · last broadcast Jul 25, 10:25 UTC
Flights observed
250
Distinct callsigns
20
Country
US
Last broadcast
Jul 25, 10:25 UTC

Last known position

Most recent position reported by Mode-S A56DDC.

Country allocation

The ICAO 24-bit address A56DDC 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
UPS673 - 6 2026-07-03
UPS5180 United Parcel Service 6 2026-05-14
UPS1357 - 6 2026-06-18
UPS1316 - 5 2026-07-17
UPS1315 - 5 2026-06-20
UPS1314 - 5 2026-06-19
UPS1160 United Parcel Service 5 2026-07-24
UPS991 - 4 2026-07-09
UPS988 - 4 2026-07-07
UPS9745 United Parcel Service 4 2026-07-20
UPS887 - 4 2026-07-15
UPS5674 - 4 2026-07-02
UPS2983 - 4 2026-07-07
UPS1446 - 4 2026-07-16
UPS1358 - 4 2026-06-17
UPS1351 - 4 2026-07-01
UPS1291 United Parcel Service 4 2026-07-23
UPS1284 - 4 2026-07-02
UPS1134 United Parcel Service 4 2026-05-19
UPS1131 United Parcel Service 4 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 UPS652 SDF → SGF Jul 25, 09:25 UTCJul 25, 10:25 UTC1h 0m
2026-07-24 UPS5233 RIC → SDF Jul 24, 10:55 UTCJul 24, 12:05 UTC1h 10m
2026-07-24 UPS1160 SDF → PIT Jul 24, 07:35 UTCJul 24, 08:20 UTC45m
2026-07-24 UPS1160 SDF → PIT Jul 24, 06:00 UTCJul 24, 06:45 UTC45m
2026-07-24 UPS1195 PHL → SDF Jul 24, 01:25 UTCJul 24, 02:50 UTC1h 25m
2026-07-23 UPS2020 DFW → BOS Jul 23, 20:20 UTCJul 23, 23:05 UTC2h 45m
2026-07-23 UPS2977 PDX → DFW Jul 23, 12:40 UTCJul 23, 15:55 UTC3h 15m
2026-07-23 UPS996 SDF → PDX Jul 23, 05:55 UTCJul 23, 10:05 UTC4h 10m
2026-07-23 UPS1291 CAE → SDF Jul 23, 01:10 UTCJul 23, 02:10 UTC1h 0m
2026-07-22 UPS671 ICT → SDF Jul 22, 02:10 UTCJul 22, 03:40 UTC1h 30m
2026-07-21 UPS672 SDF → ICT Jul 21, 09:10 UTCJul 21, 10:40 UTC1h 30m
2026-07-21 UPS1365 ABY → SDF Jul 21, 02:50 UTCJul 21, 03:55 UTC1h 5m
2026-07-20 UPS9745 RFD → SDF Jul 20, 23:20 UTCJul 21, 00:15 UTC54m
2026-07-20 UPS9745 RFD → SDF Jul 20, 23:12 UTCJul 21, 00:16 UTC1h 4m
2026-07-17 UPS1316 - Jul 17, 09:15 UTCJul 17, 10:00 UTC45m
2026-07-17 UPS1316 - Jul 17, 06:54 UTCJul 17, 08:25 UTC1h 30m
2026-07-17 UPS1445 CLE → PHL Jul 17, 01:39 UTCJul 17, 02:39 UTC1h 0m
2026-07-16 UPS1446 - Jul 16, 08:25 UTCJul 16, 09:15 UTC50m
2026-07-16 UPS1029 - Jul 16, 02:15 UTCJul 16, 04:15 UTC2h 0m
2026-07-15 UPS5062 - Jul 15, 18:55 UTCJul 15, 20:40 UTC1h 45m
2026-07-15 UPS2907 - Jul 15, 11:55 UTCJul 15, 15:50 UTC3h 55m
2026-07-15 UPS887 PHX → ONT Jul 15, 04:35 UTCJul 15, 05:20 UTC45m
2026-07-15 UPS887 - Jul 15, 02:55 UTCJul 15, 03:45 UTC50m
2026-07-14 UPS888 - Jul 14, 09:40 UTCJul 14, 11:05 UTC1h 25m
2026-07-14 UPS888 ONT → ABQ Jul 14, 09:43 UTCJul 14, 11:03 UTC1h 20m
2026-07-14 UPS955 MHR → ONT Jul 14, 03:45 UTCJul 14, 04:50 UTC1h 5m
2026-07-14 UPS955 MHR → ONT Jul 14, 03:49 UTCJul 14, 04:44 UTC55m
2026-07-13 UPS2956 FEP → MHR Jul 13, 19:35 UTCJul 13, 22:55 UTC3h 20m
2026-07-13 UPS2956 RFD → MHR Jul 13, 19:36 UTCJul 13, 22:56 UTC3h 20m
2026-07-10 UPS7825 - Jul 10, 09:55 UTCJul 10, 10:15 UTC20m
2026-07-10 UPS7825 CID → RFD Jul 10, 09:50 UTCJul 10, 10:23 UTC33m
2026-07-10 UPS572 - Jul 10, 08:35 UTCJul 10, 09:00 UTC25m
2026-07-10 UPS572 RFD → CID Jul 10, 08:38 UTCJul 10, 09:02 UTC24m
2026-07-10 UPS987 - Jul 10, 02:35 UTCJul 10, 05:40 UTC3h 5m
2026-07-10 UPS987 BFI → RFD Jul 10, 02:34 UTCJul 10, 05:43 UTC3h 9m
2026-07-09 UPS5980 - Jul 9, 18:25 UTCJul 9, 22:00 UTC3h 35m
2026-07-09 UPS5833 MHR → DFW Jul 9, 13:50 UTCJul 9, 16:30 UTC2h 40m
2026-07-09 UPS5833 MHR → DFW Jul 9, 13:50 UTCJul 9, 16:28 UTC2h 38m
2026-07-09 UPS5833 - Jul 9, 11:50 UTCJul 9, 12:50 UTC1h 0m
2026-07-09 UPS834 - Jul 9, 09:25 UTCJul 9, 10:45 UTC1h 20m
2026-07-09 UPS834 ONT → BOI Jul 9, 09:17 UTCJul 9, 10:52 UTC1h 35m
2026-07-09 UPS991 GEG → ONT Jul 9, 02:40 UTCJul 9, 04:45 UTC2h 5m
2026-07-09 UPS991 GEG → ONT Jul 9, 02:42 UTCJul 9, 04:36 UTC1h 54m
2026-07-09 UPS2980 PDX → GEG Jul 9, 00:50 UTCJul 9, 01:35 UTC45m
2026-07-08 UPS2980 DFW → PDX Jul 8, 19:40 UTCJul 8, 23:10 UTC3h 30m
2026-07-08 UPS2791 SAT → DFW Jul 8, 12:05 UTCJul 8, 12:55 UTC50m
2026-07-08 UPS2791 SAT → DFW Jul 8, 12:05 UTCJul 8, 12:51 UTC46m
2026-07-07 UPS2784 DFW → SAT Jul 7, 22:30 UTCJul 7, 23:20 UTC50m
2026-07-07 UPS2784 - Jul 7, 18:25 UTCJul 7, 21:05 UTC2h 40m
2026-07-07 UPS2983 - Jul 7, 12:45 UTCJul 7, 14:50 UTC2h 5m

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 N449UP page for operator, model, and routing details .

Mode-S A56DDC frequently asked

What is Mode-S code A56DDC?
A56DDC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N449UP.
Where is Mode-S A56DDC registered?
Mode-S code A56DDC 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 A56DDC broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 10:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A56DDC, octal 51266734, decimal 10,841,564.
What flights does A56DDC operate?
Mode-S A56DDC has broadcast 20 distinct callsigns, including UPS673, UPS5180, UPS1357, UPS1316, UPS1315.