Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB1573

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N813KS · CESSNA 172R Cutlass RG · operated by FARGO JET CENTER LLC

Hex
AB1573
Octal
52612563
Decimal
11,212,147
Country
US
Tail
N813KS
Type
C72R
No current signal · last broadcast 6d ago
Flights observed
135
Distinct callsigns
1
Country
US
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S AB1573.

Country allocation

The ICAO 24-bit address AB1573 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
N813KS - 135 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N813KS FAR → FAR Jul 24, 13:40 UTCJul 24, 14:05 UTC25m
2026-07-23 N813KS - Jul 23, 21:10 UTCJul 23, 21:30 UTC20m
2026-07-23 N813KS FAR → FAR Jul 23, 15:50 UTCJul 23, 16:35 UTC45m
2026-07-23 N813KS - Jul 23, 12:55 UTCJul 23, 13:15 UTC20m
2026-07-22 N813KS FAR → FAR Jul 22, 22:45 UTCJul 22, 23:35 UTC50m
2026-07-22 N813KS FAR → FAR Jul 22, 13:50 UTCJul 22, 14:45 UTC55m
2026-07-22 N813KS - Jul 22, 11:45 UTCJul 22, 12:40 UTC55m
2026-07-20 N813KS - Jul 20, 13:55 UTCJul 20, 14:30 UTC35m
2026-07-17 N813KS - Jul 17, 13:40 UTCJul 17, 14:35 UTC55m
2026-07-15 N813KS - Jul 15, 15:40 UTCJul 15, 16:45 UTC1h 5m
2026-07-15 N813KS - Jul 15, 13:50 UTCJul 15, 14:45 UTC55m
2026-07-14 N813KS - Jul 14, 15:50 UTCJul 14, 16:45 UTC55m
2026-07-14 N813KS FAR → FAR Jul 14, 13:40 UTCJul 14, 14:20 UTC40m
2026-07-13 N813KS - Jul 13, 15:00 UTCJul 13, 16:10 UTC1h 10m
2026-07-10 N813KS - Jul 10, 15:35 UTCJul 10, 16:40 UTC1h 5m
2026-07-10 N813KS - Jul 10, 13:45 UTCJul 10, 14:35 UTC50m
2026-07-10 N813KS - Jul 10, 11:40 UTCJul 10, 12:20 UTC40m
2026-07-09 N813KS FAR → FAR Jul 9, 22:35 UTCJul 9, 23:30 UTC55m
2026-07-09 N813KS - Jul 9, 12:30 UTCJul 9, 13:35 UTC1h 5m
2026-07-08 N813KS - Jul 8, 23:45 UTCJul 9, 00:50 UTC1h 5m
2026-07-08 N813KS - Jul 8, 21:30 UTCJul 8, 22:00 UTC30m
2026-07-08 N813KS - Jul 8, 15:45 UTCJul 8, 16:35 UTC50m
2026-07-08 N813KS - Jul 8, 13:50 UTCJul 8, 14:50 UTC1h 0m
2026-07-08 N813KS FAR → FAR Jul 8, 11:35 UTCJul 8, 12:40 UTC1h 5m
2026-07-07 N813KS - Jul 7, 21:35 UTCJul 7, 22:00 UTC25m
2026-07-07 N813KS - Jul 7, 15:45 UTCJul 7, 16:50 UTC1h 5m
2026-07-07 N813KS - Jul 7, 13:45 UTCJul 7, 14:45 UTC1h 0m
2026-07-02 N813KS - Jul 2, 15:30 UTCJul 2, 16:25 UTC55m
2026-07-02 N813KS - Jul 2, 14:10 UTCJul 2, 14:35 UTC25m
2026-07-02 N813KS - Jul 2, 11:50 UTCJul 2, 12:45 UTC55m
2026-07-01 N813KS FAR → FAR Jul 1, 23:35 UTCJul 2, 01:00 UTC1h 25m
2026-07-01 N813KS - Jul 1, 21:35 UTCJul 1, 22:30 UTC55m
2026-07-01 N813KS - Jul 1, 15:55 UTCJul 1, 16:55 UTC1h 0m
2026-07-01 N813KS FAR → FAR Jul 1, 12:30 UTCJul 1, 13:25 UTC55m
2026-07-01 N813KS - Jul 1, 00:05 UTCJul 1, 01:05 UTC1h 0m
2026-06-30 N813KS FAR → FAR Jun 30, 11:45 UTCJun 30, 12:35 UTC50m
2026-06-26 N813KS FAR → FAR Jun 26, 12:59 UTCJun 26, 13:49 UTC50m
2026-06-25 N813KS - Jun 25, 22:54 UTCJun 25, 23:44 UTC50m
2026-06-25 N813KS - Jun 25, 00:55 UTCJun 25, 01:30 UTC35m
2026-06-24 N813KS - Jun 24, 16:19 UTCJun 24, 16:29 UTC10m
2026-06-24 N813KS FAR → FAR Jun 24, 11:34 UTCJun 24, 11:45 UTC10m
2026-06-23 N813KS - Jun 23, 19:15 UTCJun 23, 19:59 UTC45m
2026-06-22 N813KS FAR → FAR Jun 22, 22:34 UTCJun 23, 00:00 UTC1h 25m
2026-06-22 N813KS FAR → FAR Jun 22, 20:44 UTCJun 22, 21:49 UTC1h 5m
2026-06-22 N813KS - Jun 22, 16:45 UTCJun 22, 17:29 UTC45m
2026-06-22 N813KS - Jun 22, 12:44 UTCJun 22, 13:59 UTC1h 15m
2026-06-22 N813KS - Jun 22, 00:50 UTCJun 22, 01:40 UTC50m
2026-06-19 N813KS - Jun 19, 04:10 UTCJun 19, 04:50 UTC40m
2026-06-19 N813KS - Jun 19, 02:59 UTCJun 19, 03:39 UTC40m
2026-06-19 N813KS FAR → FAR Jun 19, 00:45 UTCJun 19, 01:19 UTC35m

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 N813KS page for operator, model, and routing details .

Mode-S AB1573 frequently asked

What is Mode-S code AB1573?
AB1573 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N813KS.
Where is Mode-S AB1573 registered?
Mode-S code AB1573 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 AB1573 broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB1573, octal 52612563, decimal 11,212,147.
What flights does AB1573 operate?
Mode-S AB1573 has broadcast 1 distinct callsign, including N813KS.