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sensors Mode-S transponder

A112E1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1688L · operated by HEAVY METAL AIR LLC

Hex
A112E1
Octal
50211341
Decimal
10,556,129
Country
US
Tail
N1688L
Type
C172
No current signal · last broadcast 5d ago
Flights observed
174
Distinct callsigns
1
Country
US
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S A112E1.

Country allocation

The ICAO 24-bit address A112E1 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
N1688L - 174 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N1688L FRG → FRG Jul 26, 19:20 UTCJul 26, 20:40 UTC1h 20m
2026-07-26 N1688L - Jul 26, 13:25 UTCJul 26, 14:30 UTC1h 5m
2026-07-25 N1688L FRG → FRG Jul 25, 18:10 UTCJul 25, 19:10 UTC1h 0m
2026-07-24 N1688L - Jul 24, 13:25 UTCJul 24, 14:35 UTC1h 10m
2026-07-23 N1688L - Jul 23, 21:45 UTCJul 23, 23:15 UTC1h 30m
2026-07-23 N1688L FRG → FRG Jul 23, 17:45 UTCJul 23, 18:50 UTC1h 5m
2026-07-23 N1688L FRG → FRG Jul 23, 13:25 UTCJul 23, 14:05 UTC40m
2026-07-22 N1688L - Jul 22, 19:55 UTCJul 22, 21:05 UTC1h 10m
2026-07-22 N1688L - Jul 22, 17:50 UTCJul 22, 18:40 UTC50m
2026-07-22 N1688L FRG → FRG Jul 22, 15:15 UTCJul 22, 16:15 UTC1h 0m
2026-07-21 N1688L FRG → FRG Jul 21, 13:30 UTCJul 21, 14:20 UTC50m
2026-07-21 N1688L FRG → FRG Jul 21, 11:15 UTCJul 21, 12:20 UTC1h 5m
2026-07-20 N1688L FRG → FRG Jul 20, 17:25 UTCJul 20, 18:50 UTC1h 25m
2026-07-20 N1688L FRG → FRG Jul 20, 13:20 UTCJul 20, 14:10 UTC50m
2026-07-16 N1688L FRG → FRG Jul 16, 15:35 UTCJul 16, 16:25 UTC50m
2026-07-15 N1688L FRG → FRG Jul 15, 15:20 UTCJul 15, 16:00 UTC40m
2026-07-11 N1688L FRG → FRG Jul 11, 15:35 UTCJul 11, 16:40 UTC1h 5m
2026-07-11 N1688L FRG → FRG Jul 11, 11:05 UTCJul 11, 12:20 UTC1h 15m
2026-07-10 N1688L FRG → FRG Jul 10, 17:45 UTCJul 10, 19:05 UTC1h 20m
2026-07-10 N1688L - Jul 10, 15:25 UTCJul 10, 16:45 UTC1h 20m
2026-07-09 N1688L - Jul 9, 15:20 UTCJul 9, 16:50 UTC1h 30m
2026-07-09 N1688L FRG → FRG Jul 9, 13:00 UTCJul 9, 14:10 UTC1h 10m
2026-07-08 N1688L - Jul 8, 23:30 UTCJul 9, 00:40 UTC1h 10m
2026-07-08 N1688L - Jul 8, 22:10 UTCJul 8, 22:50 UTC40m
2026-07-08 N1688L - Jul 8, 20:05 UTCJul 8, 20:50 UTC45m
2026-07-08 N1688L FRG → FRG Jul 8, 15:20 UTCJul 8, 16:20 UTC1h 0m
2026-07-05 N1688L - Jul 5, 00:40 UTCJul 5, 00:55 UTC15m
2026-07-04 N1688L - Jul 4, 13:25 UTCJul 4, 14:20 UTC55m
2026-07-03 N1688L FRG → FRG Jul 3, 21:40 UTCJul 3, 21:55 UTC15m
2026-07-01 N1688L - Jul 1, 13:20 UTCJul 1, 14:30 UTC1h 10m
2026-06-30 N1688L - Jun 30, 19:40 UTCJun 30, 20:40 UTC1h 0m
2026-06-30 N1688L - Jun 30, 15:35 UTCJun 30, 16:40 UTC1h 5m
2026-06-30 N1688L BTV → FRG Jun 30, 01:40 UTCJun 30, 03:45 UTC2h 5m
2026-06-29 N1688L FRG → BTV Jun 29, 22:39 UTCJun 30, 00:55 UTC2h 15m
2026-06-29 N1688L - Jun 29, 15:54 UTCJun 29, 16:55 UTC1h 0m
2026-06-29 N1688L - Jun 29, 13:09 UTCJun 29, 14:34 UTC1h 25m
2026-06-28 N1688L - Jun 28, 14:19 UTCJun 28, 16:09 UTC1h 50m
2026-06-22 N1688L - Jun 22, 13:14 UTCJun 22, 14:14 UTC1h 0m
2026-06-22 N1688L FRG → FRG Jun 22, 11:24 UTCJun 22, 12:30 UTC1h 5m
2026-06-21 N1688L - Jun 21, 19:50 UTCJun 21, 21:29 UTC1h 40m
2026-06-21 N1688L FRG → FRG Jun 21, 17:54 UTCJun 21, 18:39 UTC45m
2026-06-21 N1688L - Jun 21, 15:49 UTCJun 21, 16:49 UTC1h 0m
2026-06-21 N1688L FRG → FRG Jun 21, 13:44 UTCJun 21, 14:30 UTC45m
2026-06-21 N1688L FRG → FRG Jun 21, 11:20 UTCJun 21, 12:19 UTC1h 0m
2026-06-19 N1688L - Jun 19, 20:49 UTCJun 19, 22:30 UTC1h 40m
2026-06-19 N1688L FRG → FRG Jun 19, 17:55 UTCJun 19, 18:49 UTC55m
2026-06-19 N1688L - Jun 19, 15:04 UTCJun 19, 16:14 UTC1h 10m
2026-06-19 N1688L - Jun 19, 13:20 UTCJun 19, 13:54 UTC35m
2026-06-17 N1688L - Jun 17, 22:30 UTCJun 17, 23:45 UTC1h 15m
2026-06-17 N1688L - Jun 17, 18:55 UTCJun 17, 20:00 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 N1688L page for operator, model, and routing details .

Mode-S A112E1 frequently asked

What is Mode-S code A112E1?
A112E1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1688L.
Where is Mode-S A112E1 registered?
Mode-S code A112E1 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 A112E1 broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A112E1, octal 50211341, decimal 10,556,129.
What flights does A112E1 operate?
Mode-S A112E1 has broadcast 1 distinct callsign, including N1688L.