Apparatus

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sensors Mode-S transponder

A4C872

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N407UP · BOEING 757-200 · operated by UNITED PARCEL SERVICE CO

Hex
A4C872
Octal
51144162
Decimal
10,799,218
Country
US
Tail
N407UP
Type
B752
No current signal · last broadcast Jul 24, 08:40 UTC
Flights observed
261
Distinct callsigns
20
Country
US
Last broadcast
Jul 24, 08:40 UTC

Last known position

Most recent position reported by Mode-S A4C872.

Country allocation

The ICAO 24-bit address A4C872 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
UPS1134 - 8 2026-07-16
UPS1347 - 6 2026-07-09
UPS1316 - 6 2026-07-08
UPS834 - 5 2026-07-02
UPS5833 - 5 2026-07-02
UPS582 - 5 2026-07-17
UPS1376 - 5 2026-06-26
UPS1284 United Parcel Service 5 2026-07-24
UPS996 - 4 2026-07-10
UPS990 United Parcel Service 4 2026-07-21
UPS937 - 4 2026-07-14
UPS753 United Parcel Service 4 2026-05-22
UPS572 - 4 2026-07-03
UPS5357 United Parcel Service 4 2026-04-22
UPS5273 United Parcel Service 4 2026-05-20
UPS525 - 4 2026-07-21
UPS495 - 4 2026-06-30
UPS2980 United Parcel Service 4 2026-04-16
UPS1352 United Parcel Service 4 2026-04-22
UPS1139 - 4 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 UPS1284 PHL → CLT Jul 24, 07:30 UTCJul 24, 08:40 UTC1h 10m
2026-07-23 UPS2941 OAK → SDF Jul 23, 13:35 UTCJul 23, 18:05 UTC4h 30m
2026-07-23 UPS948 SDF → DEN Jul 23, 07:55 UTCJul 23, 11:40 UTC3h 45m
2026-07-23 UPS673 MCI → RFD Jul 23, 02:40 UTCJul 23, 03:25 UTC45m
2026-07-22 UPS1029 BDL → RFD Jul 22, 02:05 UTCJul 22, 04:05 UTC2h 0m
2026-07-21 UPS5062 - Jul 21, 19:15 UTCJul 21, 20:55 UTC1h 40m
2026-07-21 UPS2989 BFI → SDF Jul 21, 12:50 UTCJul 21, 16:15 UTC3h 25m
2026-07-21 UPS990 SDF → GEG Jul 21, 09:15 UTCJul 21, 11:35 UTC2h 20m
2026-07-21 UPS990 SDF → GEG Jul 21, 05:40 UTCJul 21, 07:55 UTC2h 15m
2026-07-21 UPS525 - Jul 21, 03:15 UTCJul 21, 04:10 UTC55m
2026-07-18 UPS524 SDF → CID Jul 18, 08:55 UTCJul 18, 09:50 UTC55m
2026-07-18 UPS581 - Jul 18, 02:19 UTCJul 18, 04:00 UTC1h 41m
2026-07-17 UPS582 - Jul 17, 08:45 UTCJul 17, 10:40 UTC1h 55m
2026-07-17 UPS1139 - Jul 17, 01:49 UTCJul 17, 03:14 UTC1h 25m
2026-07-16 UPS1134 - Jul 16, 08:30 UTCJul 16, 08:55 UTC25m
2026-07-16 UPS1134 PHL → ALB Jul 16, 07:05 UTCJul 16, 07:45 UTC40m
2026-07-16 UPS1341 - Jul 16, 02:00 UTCJul 16, 04:15 UTC2h 15m
2026-07-15 UPS5334 DFW → MIA Jul 15, 21:30 UTCJul 15, 23:55 UTC2h 25m
2026-07-15 UPS9310 SAT → DFW Jul 15, 01:40 UTCJul 15, 02:45 UTC1h 5m
2026-07-14 UPS2784 - Jul 14, 18:40 UTCJul 14, 21:10 UTC2h 30m
2026-07-14 UPS2784 ONT → SAT Jul 14, 18:43 UTCJul 14, 21:01 UTC2h 18m
2026-07-14 UPS7891 FAR → ONT Jul 14, 11:25 UTCJul 14, 14:20 UTC2h 55m
2026-07-14 UPS7891 FAR → ONT Jul 14, 11:25 UTCJul 14, 14:18 UTC2h 53m
2026-07-14 UPS582 - Jul 14, 08:40 UTCJul 14, 10:30 UTC1h 50m
2026-07-14 UPS582 SDF → FAR Jul 14, 08:45 UTCJul 14, 10:31 UTC1h 46m
2026-07-14 UPS937 - Jul 14, 01:35 UTCJul 14, 05:15 UTC3h 40m
2026-07-14 UPS937 FAT → SDF Jul 14, 01:22 UTCJul 14, 05:10 UTC3h 48m
2026-07-13 UPS9787 - Jul 13, 22:10 UTCJul 13, 23:40 UTC1h 30m
2026-07-13 UPS9787 PDX → FAT Jul 13, 22:04 UTCJul 13, 23:48 UTC1h 44m
2026-07-10 UPS996 - Jul 10, 06:05 UTCJul 10, 10:20 UTC4h 15m
2026-07-10 UPS996 SDF → PDX Jul 10, 06:03 UTCJul 10, 10:17 UTC4h 14m
2026-07-09 UPS9861 - Jul 9, 09:55 UTCJul 9, 11:00 UTC1h 5m
2026-07-09 UPS9861 RIC → SDF Jul 9, 09:53 UTCJul 9, 11:00 UTC1h 7m
2026-07-09 UPS1160 - Jul 9, 07:45 UTCJul 9, 08:30 UTC45m
2026-07-09 UPS1160 - Jul 9, 05:55 UTCJul 9, 06:45 UTC50m
2026-07-09 UPS1347 - Jul 9, 02:35 UTCJul 9, 04:00 UTC1h 25m
2026-07-09 UPS1347 PNS → SDF Jul 9, 02:34 UTCJul 9, 03:52 UTC1h 18m
2026-07-09 UPS1347 RSW → PNS Jul 9, 00:25 UTCJul 9, 01:30 UTC1h 5m
2026-07-08 UPS1316 - Jul 8, 09:55 UTCJul 8, 10:40 UTC45m
2026-07-08 UPS1316 JAX → RSW Jul 8, 09:55 UTCJul 8, 10:39 UTC44m
2026-07-08 UPS1316 - Jul 8, 07:15 UTCJul 8, 08:55 UTC1h 40m
2026-07-08 UPS1317 - Jul 8, 01:20 UTCJul 8, 03:00 UTC1h 40m
2026-07-07 UPS2320 - Jul 7, 19:30 UTCJul 7, 20:55 UTC1h 25m
2026-07-07 UPS2320 SDF → JAX Jul 7, 19:35 UTCJul 7, 20:52 UTC1h 17m
2026-07-07 UPS525 - Jul 7, 03:15 UTCJul 7, 04:15 UTC1h 0m
2026-07-07 UPS525 CID → SDF Jul 7, 03:09 UTCJul 7, 04:12 UTC1h 3m
2026-07-03 UPS572 - Jul 3, 08:35 UTCJul 3, 09:00 UTC25m
2026-07-03 UPS572 RFD → CID Jul 3, 08:33 UTCJul 3, 08:56 UTC23m
2026-07-03 UPS1085 - Jul 3, 02:05 UTCJul 3, 03:55 UTC1h 50m
2026-07-03 UPS1085 EWR → RFD Jul 3, 02:04 UTCJul 3, 03:52 UTC1h 48m

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 N407UP page for operator, model, and routing details .

Mode-S A4C872 frequently asked

What is Mode-S code A4C872?
A4C872 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N407UP.
Where is Mode-S A4C872 registered?
Mode-S code A4C872 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 A4C872 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 08:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4C872, octal 51144162, decimal 10,799,218.
What flights does A4C872 operate?
Mode-S A4C872 has broadcast 20 distinct callsigns, including UPS1134, UPS1347, UPS1316, UPS834, UPS5833.