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sensors Mode-S transponder

A440C0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N373UP · BOEING 767-300 · operated by UNITED PARCEL SERVICE CO

Hex
A440C0
Octal
51040300
Decimal
10,764,480
Country
US
Tail
N373UP
Type
B763
Broadcasting now · callsign UPS2903 · 16,300 ft
Flights observed
357
Distinct callsigns
20
Country
US
Last broadcast
31m ago

Current position

A440C0 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A440C0 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
UPS973 - 7 2026-07-01
UPS5901 United Parcel Service 7 2026-07-07
UPS993 - 6 2026-07-03
UPS927 - 6 2026-06-17
UPS910 - 6 2026-07-14
UPS810 - 6 2026-06-17
UPS1331 United Parcel Service 6 2026-06-02
UPS7938 United Parcel Service 5 2026-05-23
UPS5978 United Parcel Service 5 2026-05-21
UPS403 United Parcel Service 5 2026-06-02
UPS1332 - 5 2026-06-26
UPS928 - 4 2026-06-19
UPS922 - 4 2026-07-02
UPS915 - 4 2026-06-26
UPS5938 United Parcel Service 4 2026-06-03
UPS5852 - 4 2026-07-07
UPS5333 United Parcel Service 4 2026-05-06
UPS402 United Parcel Service 4 2026-06-01
UPS382 United Parcel Service 4 2026-05-31
UPS328 United Parcel Service 4 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UPS2903 - Jul 14, 12:55 UTCJul 14, 16:00 UTC3h 5m
2026-07-14 UPS910 - Jul 14, 07:15 UTCJul 14, 10:25 UTC3h 10m
2026-07-14 UPS910 RFD → LAX Jul 14, 07:16 UTCJul 14, 10:31 UTC3h 15m
2026-07-14 UPS1301 - Jul 14, 03:05 UTCJul 14, 04:25 UTC1h 20m
2026-07-14 UPS1301 ATL → RFD Jul 14, 02:53 UTCJul 14, 04:32 UTC1h 39m
2026-07-12 UPS5306 - Jul 12, 21:05 UTCJul 12, 22:05 UTC1h 0m
2026-07-12 UPS5861 - Jul 12, 13:25 UTCJul 12, 16:25 UTC3h 0m
2026-07-11 UPS5862 - Jul 11, 21:50 UTCJul 12, 00:55 UTC3h 5m
2026-07-11 UPS497 YMX → SDF Jul 11, 14:10 UTCJul 11, 16:00 UTC1h 50m
2026-07-11 UPS474 - Jul 11, 10:45 UTCJul 11, 12:20 UTC1h 35m
2026-07-11 UPS617 - Jul 11, 02:25 UTCJul 11, 03:10 UTC45m
2026-07-10 UPS618 - Jul 10, 09:35 UTCJul 10, 10:30 UTC55m
2026-07-10 UPS618 SDF → RFD Jul 10, 09:35 UTCJul 10, 10:33 UTC58m
2026-07-10 UPS945 - Jul 10, 02:25 UTCJul 10, 06:10 UTC3h 45m
2026-07-09 UPS2954 DFW → OAK Jul 9, 20:20 UTCJul 9, 23:25 UTC3h 5m
2026-07-09 UPS2077 EWR → DFW Jul 9, 12:40 UTCJul 9, 15:30 UTC2h 50m
2026-07-09 UPS1084 - Jul 9, 08:35 UTCJul 9, 10:05 UTC1h 30m
2026-07-09 UPS1084 SDF → EWR Jul 9, 08:28 UTCJul 9, 09:57 UTC1h 29m
2026-07-09 UPS903 - Jul 9, 02:50 UTCJul 9, 06:20 UTC3h 30m
2026-07-09 UPS903 LAX → SDF Jul 9, 02:51 UTCJul 9, 06:13 UTC3h 22m
2026-07-08 UPS2900 - Jul 8, 20:10 UTCJul 8, 23:50 UTC3h 40m
2026-07-08 UPS2900 SDF → LAX Jul 8, 20:06 UTCJul 8, 23:52 UTC3h 46m
2026-07-08 UPS2861 PHX → SDF Jul 8, 12:35 UTCJul 8, 15:50 UTC3h 15m
2026-07-08 UPS2861 PHX → SDF Jul 8, 12:35 UTCJul 8, 15:38 UTC3h 3m
2026-07-08 UPS850 - Jul 8, 09:20 UTCJul 8, 10:10 UTC50m
2026-07-08 UPS850 ONT → PHX Jul 8, 09:23 UTCJul 8, 10:08 UTC45m
2026-07-08 UPS849 PHX → ONT Jul 8, 03:25 UTCJul 8, 04:10 UTC45m
2026-07-07 UPS5852 - Jul 7, 19:40 UTCJul 7, 22:45 UTC3h 5m
2026-07-07 UPS5901 LAS → SDF Jul 7, 12:00 UTCJul 7, 15:40 UTC3h 40m
2026-07-07 UPS7831 RFD → LAX Jul 7, 06:05 UTCJul 7, 09:25 UTC3h 20m
2026-07-07 UPS7831 RFD → LAX Jul 7, 05:58 UTCJul 7, 09:29 UTC3h 31m
2026-07-07 UPS1327 - Jul 7, 01:35 UTCJul 7, 03:45 UTC2h 10m
2026-07-03 UPS1326 - Jul 3, 08:20 UTCJul 3, 09:50 UTC1h 30m
2026-07-03 UPS1326 SDF → MCO Jul 3, 08:11 UTCJul 3, 09:48 UTC1h 37m
2026-07-03 UPS993 GEG → SDF Jul 3, 02:15 UTCJul 3, 05:40 UTC3h 25m
2026-07-03 UPS993 GEG → SDF Jul 3, 02:20 UTCJul 3, 05:37 UTC3h 17m
2026-07-02 UPS2994 - Jul 2, 20:40 UTCJul 3, 00:15 UTC3h 35m
2026-07-02 UPS2929 - Jul 2, 13:35 UTCJul 2, 17:05 UTC3h 30m
2026-07-02 UPS922 - Jul 2, 07:40 UTCJul 2, 11:30 UTC3h 50m
2026-07-02 UPS922 SDF → SAN Jul 2, 07:42 UTCJul 2, 11:31 UTC3h 49m
2026-07-02 UPS1305 ATL → SDF Jul 2, 02:05 UTCJul 2, 02:55 UTC50m
2026-07-01 UPS1304 - Jul 1, 08:40 UTCJul 1, 09:25 UTC45m
2026-07-01 UPS1304 SDF → ATL Jul 1, 08:36 UTCJul 1, 09:35 UTC59m
2026-07-01 UPS973 PDX → SDF Jul 1, 02:00 UTCJul 1, 05:45 UTC3h 45m
2026-07-01 UPS973 PDX → SDF Jul 1, 02:01 UTCJul 1, 05:39 UTC3h 38m
2026-06-30 UPS2978 - Jun 30, 19:15 UTCJun 30, 23:15 UTC4h 0m
2026-06-30 UPS2978 SDF → PDX Jun 30, 19:07 UTCJun 30, 23:16 UTC4h 9m
2026-06-30 UPS2013 BOS → SDF Jun 30, 12:25 UTCJun 30, 14:25 UTC2h 0m
2026-06-30 UPS2013 BOS → SDF Jun 30, 12:19 UTCJun 30, 14:22 UTC2h 3m
2026-06-30 UPS1014 - Jun 30, 08:35 UTCJun 30, 10:20 UTC1h 45m

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 N373UP page for operator, model, and routing details .

Mode-S A440C0 frequently asked

What is Mode-S code A440C0?
A440C0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N373UP.
Where is Mode-S A440C0 registered?
Mode-S code A440C0 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 A440C0 broadcasting right now?
Yes. Mode-S A440C0 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A440C0, octal 51040300, decimal 10,764,480.
What flights does A440C0 operate?
Mode-S A440C0 has broadcast 20 distinct callsigns, including UPS973, UPS5901, UPS993, UPS927, UPS910.