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sensors Mode-S transponder

A08F98

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N135UT · AIRBUS HELICOPTERS EC-135/635 · operated by MED-TRANS CORP

Hex
A08F98
Octal
50107630
Decimal
10,522,520
Country
US
Tail
N135UT
Type
EC35
No current signal · last broadcast 15d ago
Flights observed
146
Distinct callsigns
1
Country
US
Last broadcast
15d ago

Last known position

Most recent position reported by Mode-S A08F98.

Country allocation

The ICAO 24-bit address A08F98 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
N135UT - 145 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N135UT - Jul 26, 00:55 UTCJul 26, 01:40 UTC45m
2026-07-25 N135UT - Jul 25, 12:25 UTCJul 25, 12:45 UTC20m
2026-07-24 N135UT - Jul 24, 01:20 UTCJul 24, 02:10 UTC50m
2026-07-23 N135UT - Jul 23, 19:30 UTCJul 23, 19:40 UTC10m
2026-07-21 N135UT - Jul 21, 20:20 UTCJul 21, 21:00 UTC40m
2026-07-20 N135UT - Jul 20, 19:45 UTCJul 20, 20:00 UTC15m
2026-07-17 N135UT - Jul 17, 10:20 UTCJul 17, 11:30 UTC1h 10m
2026-07-16 N135UT - Jul 16, 21:35 UTCJul 16, 22:49 UTC1h 15m
2026-07-16 N135UT - Jul 16, 06:55 UTCJul 16, 08:10 UTC1h 15m
2026-07-14 - - Jul 14, 17:15 UTCJul 14, 17:35 UTC20m
2026-07-12 N135UT - Jul 12, 02:05 UTCJul 12, 03:10 UTC1h 5m
2026-07-11 N135UT - Jul 11, 20:25 UTCJul 11, 20:40 UTC15m
2026-07-11 N135UT - Jul 11, 03:40 UTCJul 11, 03:50 UTC10m
2026-07-10 N135UT - Jul 10, 17:20 UTCJul 10, 18:55 UTC1h 35m
2026-07-09 N135UT - Jul 9, 19:15 UTCJul 9, 19:35 UTC20m
2026-07-09 N135UT - Jul 9, 15:45 UTCJul 9, 16:20 UTC35m
2026-07-09 N135UT - Jul 9, 06:00 UTCJul 9, 07:00 UTC1h 0m
2026-07-08 N135UT - Jul 8, 19:10 UTCJul 8, 20:10 UTC1h 0m
2026-07-07 N135UT - Jul 7, 22:30 UTCJul 7, 23:15 UTC45m
2026-07-07 N135UT - Jul 7, 16:15 UTCJul 7, 16:40 UTC25m
2026-07-07 N135UT - Jul 7, 15:00 UTCJul 7, 15:40 UTC40m
2026-07-06 N135UT - Jul 6, 21:45 UTCJul 6, 21:55 UTC10m
2026-07-06 N135UT - Jul 6, 17:50 UTCJul 6, 18:05 UTC15m
2026-07-05 N135UT - Jul 5, 18:55 UTCJul 5, 19:25 UTC30m
2026-07-04 N135UT - Jul 4, 20:50 UTCJul 4, 21:05 UTC15m
2026-07-04 N135UT - Jul 4, 01:25 UTCJul 4, 01:45 UTC20m
2026-07-04 N135UT - Jul 4, 00:25 UTCJul 4, 00:40 UTC15m
2026-07-03 N135UT - Jul 3, 20:35 UTCJul 3, 21:30 UTC55m
2026-07-02 N135UT - Jul 2, 17:20 UTCJul 2, 17:35 UTC15m
2026-07-02 N135UT - Jul 2, 14:20 UTCJul 2, 14:35 UTC15m
2026-07-02 N135UT - Jul 2, 11:40 UTCJul 2, 12:40 UTC1h 0m
2026-07-01 N135UT - Jul 1, 03:20 UTCJul 1, 03:50 UTC30m
2026-07-01 N135UT - Jul 1, 01:20 UTCJul 1, 01:45 UTC25m
2026-06-30 N135UT - Jun 30, 16:55 UTCJun 30, 17:05 UTC10m
2026-06-28 N135UT - Jun 28, 23:50 UTCJun 29, 00:54 UTC1h 5m
2026-06-28 N135UT - Jun 28, 18:34 UTCJun 28, 20:14 UTC1h 40m
2026-06-26 N135UT - Jun 26, 19:50 UTCJun 26, 20:15 UTC25m
2026-06-26 N135UT - Jun 26, 16:44 UTCJun 26, 17:15 UTC30m
2026-06-26 N135UT - Jun 26, 14:55 UTCJun 26, 15:05 UTC10m
2026-06-26 N135UT - Jun 26, 13:59 UTCJun 26, 14:19 UTC20m
2026-06-26 N135UT - Jun 26, 00:30 UTCJun 26, 01:05 UTC35m
2026-06-23 N135UT - Jun 23, 18:55 UTCJun 23, 19:24 UTC30m
2026-06-22 N135UT - Jun 22, 03:10 UTCJun 22, 03:24 UTC15m
2026-06-22 N135UT - Jun 22, 01:44 UTCJun 22, 02:30 UTC45m
2026-06-22 N135UT - Jun 22, 01:00 UTCJun 22, 01:10 UTC10m
2026-06-21 N135UT - Jun 21, 23:55 UTCJun 22, 00:10 UTC15m
2026-06-21 N135UT - Jun 21, 13:09 UTCJun 21, 13:34 UTC25m
2026-06-21 N135UT - Jun 21, 12:14 UTCJun 21, 12:35 UTC20m
2026-06-21 N135UT - Jun 21, 05:25 UTCJun 21, 06:19 UTC55m
2026-06-20 N135UT - Jun 20, 22:05 UTCJun 20, 23:10 UTC1h 5m

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 N135UT page for operator, model, and routing details .

Mode-S A08F98 frequently asked

What is Mode-S code A08F98?
A08F98 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N135UT.
Where is Mode-S A08F98 registered?
Mode-S code A08F98 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 A08F98 broadcasting right now?
No active broadcast right now. Last signal was 15d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A08F98, octal 50107630, decimal 10,522,520.
What flights does A08F98 operate?
Mode-S A08F98 has broadcast 1 distinct callsign, including N135UT.