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sensors Mode-S transponder

A11B51

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N170XY · EMBRAER ERJ-170-200 (long wing) · operated by SWIFLITE AIRCRAFT CORP

Hex
A11B51
Octal
50215521
Decimal
10,558,289
Country
US
Tail
N170XY
Type
E75L
No current signal · last broadcast Jul 23, 23:10 UTC
Flights observed
183
Distinct callsigns
1
Country
US
Last broadcast
Jul 23, 23:10 UTC

Last known position

Most recent position reported by Mode-S A11B51.

Country allocation

The ICAO 24-bit address A11B51 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
N170XY - 183 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 N170XY - Jul 23, 22:10 UTCJul 23, 23:10 UTC1h 0m
2026-07-23 N170XY - Jul 23, 20:35 UTCJul 23, 20:50 UTC15m
2026-07-23 N170XY - Jul 23, 12:10 UTCJul 23, 13:50 UTC1h 40m
2026-07-22 N170XY - Jul 22, 21:45 UTCJul 22, 22:50 UTC1h 5m
2026-07-22 N170XY - Jul 22, 20:40 UTCJul 22, 21:00 UTC20m
2026-07-22 N170XY - Jul 22, 13:25 UTCJul 22, 13:45 UTC20m
2026-07-22 N170XY - Jul 22, 12:05 UTCJul 22, 13:05 UTC1h 0m
2026-07-21 N170XY - Jul 21, 21:55 UTCJul 21, 22:55 UTC1h 0m
2026-07-21 N170XY - Jul 21, 20:25 UTCJul 21, 20:40 UTC15m
2026-07-21 N170XY - Jul 21, 13:35 UTCJul 21, 13:50 UTC15m
2026-07-21 N170XY - Jul 21, 12:10 UTCJul 21, 13:05 UTC55m
2026-07-20 N170XY - Jul 20, 21:45 UTCJul 20, 22:50 UTC1h 5m
2026-07-20 N170XY - Jul 20, 12:05 UTCJul 20, 13:05 UTC1h 0m
2026-07-16 N170XY - Jul 16, 21:45 UTCJul 16, 22:59 UTC1h 15m
2026-07-16 N170XY - Jul 16, 20:39 UTCJul 16, 21:10 UTC30m
2026-07-16 N170XY - Jul 16, 12:00 UTCJul 16, 13:45 UTC1h 45m
2026-07-15 N170XY - Jul 15, 21:50 UTCJul 15, 22:50 UTC1h 0m
2026-07-15 N170XY - Jul 15, 20:30 UTCJul 15, 20:45 UTC15m
2026-07-15 N170XY - Jul 15, 12:10 UTCJul 15, 13:45 UTC1h 35m
2026-07-14 N170XY - Jul 14, 21:50 UTCJul 14, 22:55 UTC1h 4m
2026-07-14 N170XY - Jul 14, 20:35 UTCJul 14, 20:50 UTC15m
2026-07-14 N170XY - Jul 14, 12:40 UTCJul 14, 14:40 UTC2h 0m
2026-07-13 N170XY - Jul 13, 21:45 UTCJul 13, 23:05 UTC1h 20m
2026-07-13 N170XY - Jul 13, 12:05 UTCJul 13, 13:10 UTC1h 5m
2026-07-09 N170XY - Jul 9, 21:50 UTCJul 9, 22:50 UTC1h 0m
2026-07-09 N170XY - Jul 9, 20:40 UTCJul 9, 20:55 UTC15m
2026-07-09 N170XY - Jul 9, 12:00 UTCJul 9, 13:40 UTC1h 40m
2026-07-08 N170XY - Jul 8, 22:15 UTCJul 8, 23:15 UTC1h 0m
2026-07-08 N170XY - Jul 8, 20:45 UTCJul 8, 21:05 UTC20m
2026-07-08 N170XY - Jul 8, 13:30 UTCJul 8, 13:45 UTC15m
2026-07-08 N170XY - Jul 8, 12:00 UTCJul 8, 13:00 UTC1h 0m
2026-07-07 N170XY - Jul 7, 22:20 UTCJul 7, 23:25 UTC1h 5m
2026-07-07 N170XY - Jul 7, 20:30 UTCJul 7, 20:50 UTC20m
2026-07-07 N170XY - Jul 7, 13:40 UTCJul 7, 13:55 UTC15m
2026-07-07 N170XY - Jul 7, 12:10 UTCJul 7, 13:10 UTC1h 0m
2026-07-06 N170XY - Jul 6, 22:00 UTCJul 6, 23:00 UTC1h 0m
2026-07-06 N170XY - Jul 6, 12:05 UTCJul 6, 12:50 UTC45m
2026-07-02 N170XY - Jul 2, 22:10 UTCJul 2, 23:15 UTC1h 5m
2026-07-02 N170XY - Jul 2, 12:10 UTCJul 2, 12:55 UTC45m
2026-07-01 N170XY - Jul 1, 19:55 UTCJul 1, 23:35 UTC3h 40m
2026-06-29 N170XY - Jun 29, 21:54 UTCJun 29, 22:59 UTC1h 5m
2026-06-29 N170XY - Jun 29, 12:20 UTCJun 29, 13:14 UTC55m
2026-06-27 N170XY - Jun 27, 07:55 UTCJun 27, 09:00 UTC1h 5m
2026-06-27 N170XY - Jun 27, 05:35 UTCJun 27, 07:24 UTC1h 50m
2026-06-26 N170XY - Jun 26, 18:44 UTCJun 26, 19:55 UTC1h 10m
2026-06-26 N170XY - Jun 26, 17:40 UTCJun 26, 17:54 UTC15m
2026-06-26 N170XY - Jun 26, 15:39 UTCJun 26, 16:44 UTC1h 5m
2026-06-25 N170XY - Jun 25, 21:50 UTCJun 25, 22:49 UTC1h 0m
2026-06-25 N170XY - Jun 25, 20:45 UTCJun 25, 21:05 UTC20m
2026-06-25 N170XY - Jun 25, 12:10 UTCJun 25, 13:50 UTC1h 40m

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 N170XY page for operator, model, and routing details .

Mode-S A11B51 frequently asked

What is Mode-S code A11B51?
A11B51 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N170XY.
Where is Mode-S A11B51 registered?
Mode-S code A11B51 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 A11B51 broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 23:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A11B51, octal 50215521, decimal 10,558,289.
What flights does A11B51 operate?
Mode-S A11B51 has broadcast 1 distinct callsign, including N170XY.