Apparatus

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sensors Mode-S transponder

A44F9C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N377UP · BOEING 767-300 · operated by UNITED PARCEL SERVICE CO

Hex
A44F9C
Octal
51047634
Decimal
10,768,284
Country
US
Tail
N377UP
Type
B763
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
411
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S A44F9C.

Country allocation

The ICAO 24-bit address A44F9C 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
UPS7938 United Parcel Service 8 2026-06-06
UPS339 United Parcel Service 8 2026-06-07
UPS922 - 6 2026-07-23
UPS993 - 5 2026-06-26
UPS858 - 5 2026-07-10
UPS5326 United Parcel Service 5 2026-05-08
UPS2994 - 5 2026-06-25
UPS982 United Parcel Service 4 2026-05-15
UPS947 - 4 2026-07-01
UPS946 United Parcel Service 4 2026-05-19
UPS928 - 4 2026-07-14
UPS927 - 4 2026-07-14
UPS869 United Parcel Service 4 2026-06-13
UPS7826 United Parcel Service 4 2026-05-09
UPS606 - 4 2026-06-19
UPS5609 - 4 2026-06-19
UPS5337 United Parcel Service 4 2026-06-10
UPS5327 United Parcel Service 4 2026-05-09
UPS334 United Parcel Service 4 2026-06-02
UPS300 United Parcel Service 4 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UPS5902 ANC → SDF Jul 26, 19:50 UTCJul 26, 23:00 UTC3h 10m
2026-07-26 UPS5620 SDF → RFD Jul 26, 17:05 UTCJul 26, 17:55 UTC50m
2026-07-26 UPS5285 CLT → SDF Jul 26, 12:15 UTCJul 26, 13:15 UTC1h 0m
2026-07-25 UPS5284 SDF → CLT Jul 25, 22:15 UTCJul 25, 23:15 UTC1h 0m
2026-07-25 UPS5284 SDF → CLT Jul 25, 22:11 UTCJul 25, 23:14 UTC1h 3m
2026-07-25 UPS5541 ATL → SDF Jul 25, 13:30 UTCJul 25, 14:15 UTC45m
2026-07-25 UPS5541 ATL → SDF Jul 25, 13:22 UTCJul 25, 14:22 UTC1h 0m
2026-07-25 UPS542 SDF → MKE Jul 25, 10:20 UTCJul 25, 11:15 UTC55m
2026-07-25 UPS542 SDF → MKE Jul 25, 10:20 UTCJul 25, 11:18 UTC58m
2026-07-25 UPS787 AUS → SDF Jul 25, 02:50 UTCJul 25, 04:45 UTC1h 55m
2026-07-24 UPS788 SDF → AUS Jul 24, 08:40 UTCJul 24, 10:30 UTC1h 50m
2026-07-24 UPS801 DEN → SDF Jul 24, 03:50 UTCJul 24, 05:55 UTC2h 5m
2026-07-23 UPS5808 SDF → DEN Jul 23, 21:20 UTCJul 23, 23:50 UTC2h 30m
2026-07-23 UPS2929 LAX → MCO Jul 23, 14:20 UTCJul 23, 18:05 UTC3h 45m
2026-07-23 UPS922 - Jul 23, 09:05 UTCJul 23, 12:45 UTC3h 40m
2026-07-23 UPS921 SAN → SDF Jul 23, 02:40 UTCJul 23, 06:05 UTC3h 25m
2026-07-22 UPS2636 SDF → SAN Jul 22, 20:10 UTCJul 23, 00:10 UTC4h 0m
2026-07-22 UPS5901 - Jul 22, 11:40 UTCJul 22, 15:15 UTC3h 35m
2026-07-21 UPS2900 SDF → ONT Jul 21, 22:35 UTCJul 22, 02:15 UTC3h 40m
2026-07-21 UPS2567 - Jul 21, 12:20 UTCJul 21, 13:30 UTC1h 10m
2026-07-21 UPS2567 MSP → MSP Jul 21, 12:05 UTCJul 21, 12:10 UTC5m
2026-07-21 UPS560 - Jul 21, 09:00 UTCJul 21, 10:40 UTC1h 40m
2026-07-21 UPS973 PDX → SDF Jul 21, 02:05 UTCJul 21, 05:50 UTC3h 45m
2026-07-19 UPS976 RFD → PDX Jul 19, 19:30 UTCJul 19, 23:45 UTC4h 15m
2026-07-19 UPS5285 - Jul 19, 12:25 UTCJul 19, 13:20 UTC55m
2026-07-18 UPS5284 SDF → CLT Jul 18, 22:00 UTCJul 18, 22:55 UTC55m
2026-07-18 UPS767 DFW → SDF Jul 18, 02:55 UTCJul 18, 04:35 UTC1h 40m
2026-07-17 UPS2756 SDF → DFW Jul 17, 19:05 UTCJul 17, 21:39 UTC2h 35m
2026-07-17 UPS918 - Jul 17, 08:00 UTCJul 17, 11:30 UTC3h 30m
2026-07-17 UPS1171 HAR → SDF Jul 17, 02:05 UTCJul 17, 03:25 UTC1h 20m
2026-07-16 UPS1172 - Jul 16, 08:25 UTCJul 16, 09:35 UTC1h 10m
2026-07-16 UPS903 - Jul 16, 02:15 UTCJul 16, 05:55 UTC3h 40m
2026-07-15 UPS2900 - Jul 15, 19:45 UTCJul 15, 23:20 UTC3h 35m
2026-07-15 UPS2787 SAT → SDF Jul 15, 11:45 UTCJul 15, 13:50 UTC2h 5m
2026-07-15 UPS782 - Jul 15, 07:15 UTCJul 15, 09:15 UTC2h 0m
2026-07-15 UPS1189 PHL → SDF Jul 15, 02:40 UTCJul 15, 03:55 UTC1h 15m
2026-07-14 UPS5933 - Jul 14, 14:40 UTCJul 14, 19:35 UTC4h 55m
2026-07-14 UPS5933 ONT → PHL Jul 14, 14:34 UTCJul 14, 19:32 UTC4h 58m
2026-07-14 UPS928 - Jul 14, 07:50 UTCJul 14, 11:05 UTC3h 15m
2026-07-14 UPS928 RFD → ONT Jul 14, 07:50 UTCJul 14, 11:03 UTC3h 13m
2026-07-14 UPS927 - Jul 14, 02:50 UTCJul 14, 06:15 UTC3h 25m
2026-07-14 UPS927 ONT → RFD Jul 14, 02:55 UTCJul 14, 06:04 UTC3h 9m
2026-07-13 UPS2924 - Jul 13, 19:55 UTCJul 13, 23:10 UTC3h 15m
2026-07-13 UPS2924 RFD → ONT Jul 13, 19:56 UTCJul 13, 23:06 UTC3h 10m
2026-07-13 UPS2620 - Jul 13, 16:25 UTCJul 13, 17:20 UTC55m
2026-07-13 UPS2620 SDF → RFD Jul 13, 16:24 UTCJul 13, 17:27 UTC1h 3m
2026-07-12 UPS5321 - Jul 12, 12:55 UTCJul 12, 14:15 UTC1h 20m
2026-07-12 UPS5340 MCO → JAX Jul 12, 01:25 UTCJul 12, 02:01 UTC35m
2026-07-11 UPS5340 - Jul 11, 21:35 UTCJul 11, 23:45 UTC2h 10m
2026-07-11 UPS5771 - Jul 11, 12:20 UTCJul 11, 14:00 UTC1h 40m

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 N377UP page for operator, model, and routing details .

Mode-S A44F9C frequently asked

What is Mode-S code A44F9C?
A44F9C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N377UP.
Where is Mode-S A44F9C registered?
Mode-S code A44F9C 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 A44F9C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A44F9C, octal 51047634, decimal 10,768,284.
What flights does A44F9C operate?
Mode-S A44F9C has broadcast 20 distinct callsigns, including UPS7938, UPS339, UPS922, UPS993, UPS858.