Apparatus

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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
Broadcasting now · callsign UPS559 · 37,000 ft
Flights observed
416
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:00 UTC

Current position

ACB27C is currently broadcasting. Map zoomed to live position.

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 20 distinct

Callsign Airline Flights Last seen
UPS946 - 9 2026-07-03
UPS922 United Parcel Service 8 2026-05-27
UPS5855 - 7 2026-07-12
UPS2929 United Parcel Service 7 2026-05-27
UPS1077 - 7 2026-07-16
UPS990 United Parcel Service 6 2026-05-07
UPS903 United Parcel Service 6 2026-04-16
UPS849 - 6 2026-07-07
UPS2986 United Parcel Service 6 2026-06-17
UPS2947 United Parcel Service 6 2026-06-03
UPS2900 United Parcel Service 6 2026-04-15
UPS401 United Parcel Service 5 2026-06-04
UPS2988 United Parcel Service 5 2026-05-20
UPS2841 - 5 2026-07-15
UPS2310 United Parcel Service 5 2026-06-03
UPS1066 United Parcel Service 5 2026-06-16
UPS972 United Parcel Service 4 2026-06-02
UPS850 - 4 2026-07-14
UPS844 United Parcel Service 4 2026-04-16
UPS802 - 4 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UPS1326 SDF → MCO Jul 26, 20:20 UTCJul 26, 21:00 UTC40m
2026-07-26 UPS759 DFW → SDF Jul 26, 12:40 UTCJul 26, 14:20 UTC1h 40m
2026-07-25 UPS5762 SDF → DFW Jul 25, 20:50 UTCJul 25, 22:25 UTC1h 35m
2026-07-25 UPS5762 SDF → DFW Jul 25, 20:45 UTCJul 25, 22:27 UTC1h 42m
2026-07-25 UPS5581 EWR → SDF Jul 25, 10:00 UTCJul 25, 11:40 UTC1h 40m
2026-07-24 UPS5076 SDF → EWR Jul 24, 20:30 UTCJul 24, 22:05 UTC1h 35m
2026-07-24 UPS5957 MHR → SDF Jul 24, 13:25 UTCJul 24, 17:05 UTC3h 40m
2026-07-24 UPS966 ONT → OAK Jul 24, 08:10 UTCJul 24, 09:00 UTC50m
2026-07-24 UPS9871 OMA → FSD Jul 24, 02:55 UTCJul 24, 05:00 UTC2h 5m
2026-07-23 UPS2972 BFI → PDX Jul 23, 19:40 UTCJul 23, 21:25 UTC1h 45m
2026-07-23 UPS2805 DEN → SDF Jul 23, 13:20 UTCJul 23, 15:00 UTC1h 40m
2026-07-23 UPS810 RFD → DEN Jul 23, 07:40 UTCJul 23, 09:30 UTC1h 50m
2026-07-23 UPS775 IAH → RFD Jul 23, 03:05 UTCJul 23, 05:00 UTC1h 55m
2026-07-22 UPS5772 SDF → IAH Jul 22, 22:10 UTCJul 22, 23:00 UTC50m
2026-07-22 UPS5772 SDF → IAH Jul 22, 18:40 UTCJul 22, 20:20 UTC1h 40m
2026-07-22 UPS2907 - Jul 22, 11:45 UTCJul 22, 15:15 UTC3h 30m
2026-07-22 UPS975 PDX → ONT Jul 22, 03:45 UTCJul 22, 05:25 UTC1h 40m
2026-07-21 UPS2972 BFI → PDX Jul 21, 19:55 UTCJul 21, 21:40 UTC1h 45m
2026-07-21 UPS5609 - Jul 21, 14:30 UTCJul 21, 18:00 UTC3h 30m
2026-07-21 UPS606 - Jul 21, 12:10 UTCJul 21, 13:10 UTC1h 0m
2026-07-21 UPS9704 PDX → SGF Jul 21, 09:30 UTCJul 21, 10:20 UTC50m
2026-07-21 UPS1306 - Jul 21, 07:15 UTCJul 21, 08:05 UTC50m
2026-07-21 UPS1303 ATL → SDF Jul 21, 03:25 UTCJul 21, 04:15 UTC50m
2026-07-19 UPS5306 SDF → ATL Jul 19, 21:10 UTCJul 19, 22:15 UTC1h 5m
2026-07-19 UPS759 DFW → SDF Jul 19, 12:50 UTCJul 19, 14:30 UTC1h 40m
2026-07-18 UPS2756 SDF → DFW Jul 18, 19:15 UTCJul 18, 21:55 UTC2h 40m
2026-07-18 UPS5961 MHR → ONT Jul 18, 15:15 UTCJul 18, 16:15 UTC1h 0m
2026-07-18 UPS956 - Jul 18, 10:20 UTCJul 18, 13:55 UTC3h 35m
2026-07-18 UPS869 - Jul 18, 04:30 UTCJul 18, 07:25 UTC2h 55m
2026-07-17 UPS5862 - Jul 17, 20:15 UTCJul 17, 23:30 UTC3h 15m
2026-07-17 UPS5993 GEG → SDF Jul 17, 12:45 UTCJul 17, 16:04 UTC3h 20m
2026-07-17 UPS994 - Jul 17, 07:44 UTCJul 17, 11:30 UTC3h 45m
2026-07-17 UPS591 - Jul 17, 01:45 UTCJul 17, 04:20 UTC2h 35m
2026-07-16 UPS2594 - Jul 16, 20:09 UTCJul 16, 22:45 UTC2h 35m
2026-07-16 UPS2801 DEN → SDF Jul 16, 13:25 UTCJul 16, 15:35 UTC2h 10m
2026-07-16 UPS802 - Jul 16, 07:35 UTCJul 16, 09:40 UTC2h 5m
2026-07-16 UPS1077 - Jul 16, 02:20 UTCJul 16, 03:55 UTC1h 35m
2026-07-15 UPS2084 - Jul 15, 18:40 UTCJul 15, 23:40 UTC5h 0m
2026-07-15 UPS2841 SLC → ONT Jul 15, 12:55 UTCJul 15, 14:15 UTC1h 20m
2026-07-15 UPS842 - Jul 15, 09:25 UTCJul 15, 10:40 UTC1h 15m
2026-07-15 UPS841 SLC → ONT Jul 15, 02:50 UTCJul 15, 04:05 UTC1h 15m
2026-07-14 UPS5842 - Jul 14, 19:25 UTCJul 14, 22:05 UTC2h 40m
2026-07-14 UPS2861 - Jul 14, 12:30 UTCJul 14, 15:35 UTC3h 5m
2026-07-14 UPS2861 PHX → SDF Jul 14, 12:29 UTCJul 14, 15:33 UTC3h 4m
2026-07-14 UPS850 - Jul 14, 09:25 UTCJul 14, 10:15 UTC50m
2026-07-14 UPS850 ONT → PHX Jul 14, 09:25 UTCJul 14, 10:10 UTC45m
2026-07-14 UPS975 - Jul 14, 02:45 UTCJul 14, 04:50 UTC2h 5m
2026-07-14 UPS975 PDX → ONT Jul 14, 02:47 UTCJul 14, 04:48 UTC2h 1m
2026-07-12 UPS5978 - Jul 12, 21:05 UTCJul 13, 01:01 UTC3h 55m
2026-07-12 UPS5855 SLC → SDF Jul 12, 13:01 UTCJul 12, 15:55 UTC2h 55m

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?
Yes. Mode-S ACB27C is currently airborne.
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 20 distinct callsigns, including UPS946, UPS922, UPS5855, UPS2929, UPS1077.