Apparatus

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sensors Mode-S transponder

A41CF8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N364UP · BOEING 767-300 · operated by UNITED PARCEL SERVICE CO

Hex
A41CF8
Octal
51016370
Decimal
10,755,320
Country
US
Tail
N364UP
Type
B763
No current signal · last broadcast 11h ago
Flights observed
228
Distinct callsigns
20
Country
US
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S A41CF8.

Country allocation

The ICAO 24-bit address A41CF8 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
UPS243 - 42 2026-06-18
UPS242 - 40 2026-06-18
UPS284 - 27 2026-07-14
UPS285 - 18 2026-07-08
UPS249 United Parcel Service 12 2026-06-15
UPS248 - 12 2026-06-15
UPS269 - 11 2026-07-10
UPS268 - 11 2026-07-10
UPS267 United Parcel Service 9 2026-07-09
UPS287 - 8 2026-07-13
UPS266 - 8 2026-07-09
UPS257 - 6 2026-07-06
UPS256 - 6 2026-07-06
UPS273 United Parcel Service 3 2026-06-05
UPS272 United Parcel Service 3 2026-06-05
UPS260 United Parcel Service 3 2026-05-01
UPS239 United Parcel Service 3 2026-06-28
UPS234 United Parcel Service 3 2026-06-28
UPS259 United Parcel Service 2 2026-05-25
UPS265 United Parcel Service 1 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UPS284 - Jul 14, 03:25 UTCJul 14, 04:15 UTC50m
2026-07-14 UPS284 CGN → MMX Jul 14, 01:05 UTCJul 14, 02:00 UTC55m
2026-07-13 UPS287 - Jul 13, 21:25 UTCJul 13, 22:45 UTC1h 20m
2026-07-13 UPS287 - Jul 13, 18:25 UTCJul 13, 19:10 UTC45m
2026-07-13 UPS284 - Jul 13, 02:15 UTCJul 13, 03:05 UTC50m
2026-07-13 UPS284 - Jul 13, 00:15 UTCJul 13, 01:10 UTC55m
2026-07-10 UPS269 - Jul 10, 19:30 UTCJul 10, 22:15 UTC2h 46m
2026-07-10 UPS268 - Jul 10, 02:20 UTCJul 10, 04:45 UTC2h 25m
2026-07-09 UPS267 IST → TLV Jul 9, 21:15 UTCJul 9, 23:00 UTC1h 45m
2026-07-09 UPS266 CGN → FCO Jul 9, 01:55 UTCJul 9, 03:25 UTC1h 30m
2026-07-08 UPS285 - Jul 8, 20:25 UTCJul 8, 21:25 UTC1h 0m
2026-07-08 UPS285 - Jul 8, 18:25 UTCJul 8, 19:10 UTC45m
2026-07-08 UPS284 - Jul 8, 03:40 UTCJul 8, 04:30 UTC50m
2026-07-08 UPS284 - Jul 8, 01:05 UTCJul 8, 02:05 UTC1h 0m
2026-07-07 UPS285 - Jul 7, 20:30 UTCJul 7, 21:35 UTC1h 5m
2026-07-07 UPS285 - Jul 7, 18:25 UTCJul 7, 19:15 UTC50m
2026-07-07 UPS284 - Jul 7, 03:40 UTCJul 7, 04:30 UTC50m
2026-07-07 UPS284 - Jul 7, 01:10 UTCJul 7, 02:05 UTC55m
2026-07-06 UPS257 - Jul 6, 21:20 UTCJul 6, 23:20 UTC2h 0m
2026-07-06 UPS256 CGN → MAD Jul 6, 00:20 UTCJul 6, 02:15 UTC1h 55m
2026-07-03 UPS285 - Jul 3, 20:30 UTCJul 3, 21:30 UTC1h 0m
2026-07-03 UPS285 - Jul 3, 18:30 UTCJul 3, 19:25 UTC55m
2026-07-03 UPS284 - Jul 3, 03:30 UTCJul 3, 04:25 UTC55m
2026-07-03 UPS284 - Jul 3, 01:10 UTCJul 3, 02:05 UTC55m
2026-07-02 UPS285 - Jul 2, 20:30 UTCJul 2, 21:40 UTC1h 10m
2026-07-02 UPS285 - Jul 2, 18:30 UTCJul 2, 19:20 UTC50m
2026-07-02 UPS284 - Jul 2, 03:30 UTCJul 2, 04:30 UTC1h 0m
2026-07-02 UPS284 - Jul 2, 01:10 UTCJul 2, 02:10 UTC1h 0m
2026-07-01 UPS285 - Jul 1, 20:25 UTCJul 1, 21:20 UTC55m
2026-07-01 UPS285 - Jul 1, 18:20 UTCJul 1, 19:15 UTC55m
2026-07-01 UPS284 - Jul 1, 03:25 UTCJul 1, 04:15 UTC50m
2026-07-01 UPS284 CGN → MMX Jul 1, 01:05 UTCJul 1, 02:00 UTC55m
2026-06-30 UPS267 IST → TLV Jun 30, 21:45 UTCJun 30, 23:25 UTC1h 40m
2026-06-30 UPS266 CGN → FCO Jun 30, 02:05 UTCJun 30, 03:40 UTC1h 35m
2026-06-29 UPS269 - Jun 29, 19:49 UTCJun 29, 22:15 UTC2h 25m
2026-06-29 UPS268 - Jun 29, 02:30 UTCJun 29, 05:15 UTC2h 45m
2026-06-28 UPS239 EMA → CGN Jun 28, 22:49 UTCJun 28, 23:50 UTC1h 0m
2026-06-28 UPS234 CGN → EMA Jun 28, 20:34 UTCJun 28, 21:40 UTC1h 5m
2026-06-26 UPS257 MAD → CGN Jun 26, 21:15 UTCJun 26, 23:09 UTC1h 55m
2026-06-26 UPS256 CGN → MAD Jun 26, 01:54 UTCJun 26, 03:54 UTC2h 0m
2026-06-25 UPS257 - Jun 25, 21:35 UTCJun 25, 23:39 UTC2h 5m
2026-06-25 UPS256 CGN → MAD Jun 25, 01:44 UTCJun 25, 03:34 UTC1h 50m
2026-06-24 UPS257 MAD → CGN Jun 24, 21:40 UTCJun 24, 23:40 UTC2h 0m
2026-06-24 UPS256 CGN → MAD Jun 24, 01:49 UTCJun 24, 03:44 UTC1h 55m
2026-06-23 UPS267 IST → TLV Jun 23, 21:24 UTCJun 23, 23:10 UTC1h 45m
2026-06-23 UPS266 CGN → FCO Jun 23, 01:54 UTCJun 23, 03:15 UTC1h 20m
2026-06-22 UPS287 - Jun 22, 21:30 UTCJun 22, 22:30 UTC1h 0m
2026-06-22 UPS287 - Jun 22, 18:24 UTCJun 22, 19:14 UTC50m
2026-06-22 UPS284 - Jun 22, 02:34 UTCJun 22, 03:30 UTC55m
2026-06-22 UPS284 - Jun 22, 00:14 UTCJun 22, 01:15 UTC1h 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 N364UP page for operator, model, and routing details .

Mode-S A41CF8 frequently asked

What is Mode-S code A41CF8?
A41CF8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N364UP.
Where is Mode-S A41CF8 registered?
Mode-S code A41CF8 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 A41CF8 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A41CF8, octal 51016370, decimal 10,755,320.
What flights does A41CF8 operate?
Mode-S A41CF8 has broadcast 20 distinct callsigns, including UPS243, UPS242, UPS284, UPS285, UPS249.