Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACB27C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N917UP · BOEING 767-300 · operated by BOEING CO

Hex
ACB27C
Octal
53131174
Decimal
11,317,884
Country
US
Tail
N917UP
Type
B763
No current signal · last broadcast 5h ago
Flights observed
34
Distinct callsigns
11
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S ACB27C.

Country allocation

The ICAO 24-bit address ACB27C 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 11 distinct

Callsign Airline Flights Last seen
UPS903 United Parcel Service 6 2026-04-16
UPS2900 United Parcel Service 6 2026-04-15
UPS5855 United Parcel Service 5 2026-04-16
UPS844 United Parcel Service 4 2026-04-16
UPS5901 United Parcel Service 3 2026-04-14
UPS768 United Parcel Service 2 2026-04-17
UPS5982 - 2 2026-04-12
UPS5076 United Parcel Service 2 2026-04-17
UPS1077 United Parcel Service 2 2026-04-18
UPS788 United Parcel Service 1 2026-04-18
UPS2751 - 1 2026-04-17

Recent flights last 34

DateFlightRouteTakeoffLandingDuration
2026-04-18 UPS788 SDF → AUS Apr 18, 09:40 UTCApr 18, 11:40 UTC2h 0m
2026-04-18 UPS1077 EWR → SDF Apr 18, 03:25 UTCApr 18, 04:30 UTC1h 5m
2026-04-18 UPS1077 EWR → SDF Apr 18, 02:55 UTCApr 18, 04:27 UTC1h 32m
2026-04-17 UPS5076 SDF → EWR Apr 17, 23:25 UTCApr 18, 00:05 UTC40m
2026-04-17 UPS5076 SDF → EWR Apr 17, 22:41 UTCApr 18, 00:04 UTC1h 23m
2026-04-17 UPS2751 DFW → SDF Apr 17, 13:30 UTCApr 17, 15:00 UTC1h 30m
2026-04-17 UPS768 SDF → DFW Apr 17, 09:20 UTCApr 17, 10:30 UTC1h 10m
2026-04-17 UPS768 SDF → DFW Apr 17, 08:48 UTCApr 17, 10:30 UTC1h 42m
2026-04-16 UPS5855 SLC → SDF Apr 16, 15:15 UTCApr 16, 16:00 UTC45m
2026-04-16 UPS5855 SLC → SDF Apr 16, 13:15 UTCApr 16, 15:10 UTC1h 55m
2026-04-16 UPS844 SDF → SLC Apr 16, 09:10 UTCApr 16, 11:04 UTC1h 55m
2026-04-16 UPS844 SDF → SLC Apr 16, 07:54 UTCApr 16, 09:05 UTC1h 10m
2026-04-16 UPS903 LAX → SDF Apr 16, 05:09 UTCApr 16, 05:49 UTC40m
2026-04-16 UPS903 LAX → SDF Apr 16, 03:09 UTCApr 16, 05:05 UTC1h 55m
2026-04-16 UPS903 LAX → SDF Apr 16, 02:19 UTCApr 16, 03:04 UTC45m
2026-04-15 UPS2900 SDF → ONT Apr 15, 23:10 UTCApr 16, 00:10 UTC1h 0m
2026-04-15 UPS2900 SDF → ONT Apr 15, 21:05 UTCApr 15, 23:00 UTC1h 55m
2026-04-15 UPS2900 SDF → ONT Apr 15, 20:10 UTCApr 15, 21:00 UTC50m
2026-04-15 UPS5855 SLC → SDF Apr 15, 15:05 UTCApr 15, 15:45 UTC40m
2026-04-15 UPS5855 SLC → SDF Apr 15, 13:01 UTCApr 15, 14:55 UTC1h 54m
2026-04-15 UPS5855 SLC → SDF Apr 15, 12:56 UTCApr 15, 15:51 UTC2h 55m
2026-04-15 UPS844 SDF → SLC Apr 15, 09:00 UTCApr 15, 10:50 UTC1h 50m
2026-04-15 UPS844 SDF → SLC Apr 15, 07:39 UTCApr 15, 10:44 UTC3h 5m
2026-04-15 UPS903 LAX → SDF Apr 15, 05:00 UTCApr 15, 05:50 UTC50m
2026-04-15 UPS903 LAX → SDF Apr 15, 02:55 UTCApr 15, 04:50 UTC1h 55m
2026-04-15 UPS903 LAX → SDF Apr 15, 02:19 UTCApr 15, 05:50 UTC3h 31m
2026-04-14 UPS2900 SDF → ONT Apr 14, 22:55 UTCApr 15, 00:20 UTC1h 25m
2026-04-14 UPS2900 SDF → ONT Apr 14, 20:55 UTCApr 14, 22:50 UTC1h 55m
2026-04-14 UPS2900 SDF → ONT Apr 14, 20:03 UTCApr 15, 00:18 UTC4h 15m
2026-04-14 UPS5901 LAS → SDF Apr 14, 14:50 UTCApr 14, 15:20 UTC30m
2026-04-14 UPS5901 LAS → SDF Apr 14, 12:50 UTCApr 14, 14:45 UTC1h 55m
2026-04-14 UPS5901 LAS → SDF Apr 14, 11:59 UTCApr 14, 15:19 UTC3h 20m
2026-04-12 UPS5982 - Apr 12, 23:55 UTCApr 13, 00:10 UTC15m
2026-04-12 UPS5982 - Apr 12, 20:05 UTCApr 12, 20:15 UTC10m

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 N917UP page for operator, model, and routing details .

Mode-S ACB27C frequently asked

What is Mode-S code ACB27C?
ACB27C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N917UP.
Where is Mode-S ACB27C registered?
Mode-S code ACB27C 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 ACB27C broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACB27C, octal 53131174, decimal 11,317,884.
What flights does ACB27C operate?
Mode-S ACB27C has broadcast 11 distinct callsigns, including UPS903, UPS2900, UPS5855, UPS844, UPS5901.