Apparatus

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sensors Mode-S transponder

AB28AC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N818SH · CESSNA 560 Citation Ultra · operated by SILVERHAWK AVIATION INC

Hex
AB28AC
Octal
52624254
Decimal
11,217,068
Country
US
Tail
N818SH
Type
C560
No current signal · last broadcast 9h ago
Flights observed
114
Distinct callsigns
1
Country
US
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S AB28AC.

Country allocation

The ICAO 24-bit address AB28AC 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 1 distinct

Callsign Airline Flights Last seen
SLH818 - 114 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SLH818 LNK → SCF Jul 13, 23:00 UTCJul 14, 01:15 UTC2h 15m
2026-07-13 SLH818 - Jul 13, 21:20 UTCJul 13, 21:50 UTC30m
2026-07-13 SLH818 - Jul 13, 13:20 UTCJul 13, 13:45 UTC25m
2026-07-12 SLH818 - Jul 12, 19:45 UTCJul 12, 23:15 UTC3h 30m
2026-07-12 SLH818 - Jul 12, 15:05 UTCJul 12, 18:15 UTC3h 10m
2026-07-10 SLH818 - Jul 10, 16:05 UTCJul 10, 16:30 UTC25m
2026-07-10 SLH818 - Jul 10, 14:20 UTCJul 10, 14:50 UTC30m
2026-07-10 SLH818 - Jul 10, 13:30 UTCJul 10, 13:45 UTC15m
2026-07-09 SLH818 RST → LNK Jul 9, 21:25 UTCJul 9, 22:20 UTC55m
2026-07-09 SLH818 - Jul 9, 19:00 UTCJul 9, 19:35 UTC35m
2026-07-09 SLH818 - Jul 9, 16:00 UTCJul 9, 16:45 UTC45m
2026-07-08 SLH818 - Jul 8, 01:30 UTCJul 8, 02:30 UTC1h 0m
2026-07-07 SLH818 - Jul 7, 22:55 UTCJul 7, 23:15 UTC20m
2026-07-06 SLH818 - Jul 6, 19:50 UTCJul 6, 20:15 UTC25m
2026-07-06 SLH818 - Jul 6, 13:00 UTCJul 6, 13:30 UTC30m
2026-07-05 SLH818 - Jul 5, 16:50 UTCJul 5, 19:50 UTC3h 0m
2026-07-03 SLH818 - Jul 3, 15:30 UTCJul 3, 17:55 UTC2h 25m
2026-07-02 SLH818 - Jul 2, 23:35 UTCJul 3, 00:15 UTC40m
2026-07-02 SLH818 - Jul 2, 22:00 UTCJul 2, 22:40 UTC40m
2026-07-02 SLH818 - Jul 2, 18:10 UTCJul 2, 19:05 UTC55m
2026-07-02 SLH818 - Jul 2, 16:05 UTCJul 2, 17:00 UTC55m
2026-06-28 SLH818 - Jun 28, 21:34 UTCJun 29, 01:00 UTC3h 25m
2026-06-28 SLH818 - Jun 28, 20:04 UTCJun 28, 20:29 UTC25m
2026-06-28 SLH818 GRB → DSM Jun 28, 18:14 UTCJun 28, 19:25 UTC1h 10m
2026-06-28 SLH818 - Jun 28, 15:24 UTCJun 28, 16:35 UTC1h 10m
2026-06-28 SLH818 - Jun 28, 14:09 UTCJun 28, 14:34 UTC25m
2026-06-28 SLH818 - Jun 28, 12:19 UTCJun 28, 12:50 UTC30m
2026-06-27 SLH818 - Jun 27, 19:39 UTCJun 27, 21:15 UTC1h 35m
2026-06-27 SLH818 - Jun 27, 15:05 UTCJun 27, 16:35 UTC1h 30m
2026-06-26 SLH818 OMA → LNK Jun 26, 20:04 UTCJun 26, 23:00 UTC2h 55m
2026-06-26 SLH818 - Jun 26, 13:55 UTCJun 26, 17:09 UTC3h 15m
2026-06-25 SLH818 - Jun 25, 17:20 UTCJun 25, 20:05 UTC2h 45m
2026-06-25 SLH818 - Jun 25, 12:25 UTCJun 25, 15:24 UTC3h 0m
2026-06-22 SLH818 - Jun 22, 21:00 UTCJun 22, 21:25 UTC25m
2026-06-22 SLH818 - Jun 22, 12:19 UTCJun 22, 12:44 UTC25m
2026-06-22 SLH818 - Jun 22, 00:40 UTCJun 22, 01:25 UTC45m
2026-06-21 SLH818 - Jun 21, 22:20 UTCJun 21, 22:44 UTC25m
2026-06-21 SLH818 - Jun 21, 19:55 UTCJun 21, 21:29 UTC1h 35m
2026-06-19 SLH818 - Jun 19, 13:29 UTCJun 19, 15:29 UTC2h 0m
2026-06-18 SLH818 - Jun 18, 18:25 UTCJun 18, 19:10 UTC45m
2026-06-18 SLH818 - Jun 18, 16:40 UTCJun 18, 17:21 UTC41m
2026-06-18 SLH818 - Jun 18, 14:10 UTCJun 18, 15:35 UTC1h 25m
2026-06-18 SLH818 LNK → MDW Jun 18, 11:40 UTCJun 18, 12:50 UTC1h 10m
2026-06-17 SLH818 - Jun 17, 17:50 UTCJun 17, 20:15 UTC2h 25m
2026-06-17 SLH818 LNK → HSH Jun 17, 13:45 UTCJun 17, 16:20 UTC2h 35m
2026-06-15 SLH818 - Jun 15, 20:50 UTCJun 15, 21:04 UTC15m
2026-06-15 SLH818 - Jun 15, 12:39 UTCJun 15, 13:00 UTC20m
2026-06-12 SLH818 HSH → LNK Jun 12, 19:50 UTCJun 12, 22:10 UTC2h 20m
2026-06-12 SLH818 LNK → HSH Jun 12, 15:40 UTCJun 12, 18:35 UTC2h 55m
2026-06-11 SLH818 - Jun 11, 22:00 UTCJun 11, 22:15 UTC15m

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 N818SH page for operator, model, and routing details .

Mode-S AB28AC frequently asked

What is Mode-S code AB28AC?
AB28AC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N818SH.
Where is Mode-S AB28AC registered?
Mode-S code AB28AC 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 AB28AC broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB28AC, octal 52624254, decimal 11,217,068.
What flights does AB28AC operate?
Mode-S AB28AC has broadcast 1 distinct callsign, including SLH818.