Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A1200D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17159 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A1200D
Octal
50220015
Decimal
10,559,501
Country
US
Tail
N17159
Type
E45X
No current signal · last broadcast 3h ago
Flights observed
267
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A1200D.

Country allocation

The ICAO 24-bit address A1200D 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 20 distinct

Callsign Airline Flights Last seen
UCA4878 - 6 2026-07-12
UCA4377 - 6 2026-07-10
UCA4352 - 5 2026-06-28
UCA4846 CommutAir 4 2026-06-28
UCA4838 - 4 2026-07-12
UCA4825 - 4 2026-07-10
UCA4376 CommutAir 4 2026-06-15
UCA4341 - 4 2026-06-21
UCA4331 CommutAir 4 2026-06-25
UCA4289 - 4 2026-06-25
UCA4266 - 4 2026-06-24
UCA4996 CommutAir 3 2026-06-19
UCA4980 - 3 2026-07-04
UCA4969 - 3 2026-06-24
UCA4896 - 3 2026-06-25
UCA4851 - 3 2026-06-14
UCA4850 CommutAir 3 2026-06-01
UCA4830 - 3 2026-07-13
UCA4820 - 3 2026-06-18
UCA4811 CommutAir 3 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 UCA4830 - Jul 13, 22:10 UTCJul 13, 23:15 UTC1h 5m
2026-07-13 UCA4371 - Jul 13, 15:15 UTCJul 13, 16:00 UTC45m
2026-07-13 UCA4852 - Jul 13, 12:35 UTCJul 13, 14:00 UTC1h 25m
2026-07-12 UCA4867 - Jul 12, 22:50 UTCJul 13, 00:01 UTC1h 10m
2026-07-12 UCA4838 - Jul 12, 20:35 UTCJul 12, 21:40 UTC1h 5m
2026-07-12 UCA4838 OKC → IAH Jul 12, 20:39 UTCJul 12, 21:49 UTC1h 10m
2026-07-12 UCA4301 - Jul 12, 18:35 UTCJul 12, 19:40 UTC1h 5m
2026-07-12 UCA4878 - Jul 12, 16:15 UTCJul 12, 17:30 UTC1h 15m
2026-07-11 UCA4323 - Jul 11, 22:01 UTCJul 11, 23:00 UTC1h 0m
2026-07-11 UCA4350 - Jul 11, 19:55 UTCJul 11, 21:00 UTC1h 5m
2026-07-11 UCA4350 MAF → IAH Jul 11, 19:28 UTCJul 11, 21:02 UTC1h 34m
2026-07-11 UCA4239 - Jul 11, 17:10 UTCJul 11, 18:20 UTC1h 10m
2026-07-10 UCA4377 - Jul 10, 21:15 UTCJul 10, 21:50 UTC35m
2026-07-10 UCA4825 IAH → CRP Jul 10, 19:39 UTCJul 10, 20:13 UTC34m
2026-07-10 UCA4245 - Jul 10, 17:20 UTCJul 10, 18:10 UTC50m
2026-07-10 UCA4245 JAN → IAH Jul 10, 17:20 UTCJul 10, 18:07 UTC47m
2026-07-10 UCA4347 - Jul 10, 15:10 UTCJul 10, 15:50 UTC40m
2026-07-10 UCA4318 - Jul 10, 12:35 UTCJul 10, 13:20 UTC45m
2026-07-10 UCA4334 - Jul 10, 00:00 UTCJul 10, 00:45 UTC45m
2026-07-10 UCA4334 IAH → JAN Jul 10, 00:02 UTCJul 10, 01:07 UTC1h 5m
2026-07-09 UCA4242 - Jul 9, 20:05 UTCJul 9, 21:30 UTC1h 25m
2026-07-09 UCA4242 BHM → IAH Jul 9, 20:12 UTCJul 9, 21:26 UTC1h 14m
2026-07-09 UCA4263 - Jul 9, 17:35 UTCJul 9, 19:00 UTC1h 25m
2026-07-09 UCA4263 IAH → BHM Jul 9, 17:32 UTCJul 9, 18:53 UTC1h 21m
2026-07-09 UCA4357 - Jul 9, 14:40 UTCJul 9, 15:35 UTC55m
2026-07-09 UCA4285 - Jul 9, 00:15 UTCJul 9, 01:00 UTC45m
2026-07-08 UCA4859 - Jul 8, 19:35 UTCJul 8, 20:55 UTC1h 20m
2026-07-08 UCA4859 LBB → IAH Jul 8, 19:45 UTCJul 8, 20:47 UTC1h 2m
2026-07-08 UCA4354 - Jul 8, 17:20 UTCJul 8, 18:25 UTC1h 5m
2026-07-08 UCA4224 AMA → IAH Jul 8, 14:10 UTCJul 8, 15:20 UTC1h 10m
2026-07-08 UCA4839 - Jul 8, 01:55 UTCJul 8, 03:00 UTC1h 5m
2026-07-07 UCA4303 - Jul 7, 22:35 UTCJul 7, 23:55 UTC1h 20m
2026-07-07 UCA4869 - Jul 7, 19:35 UTCJul 7, 20:55 UTC1h 20m
2026-07-07 UCA4338 - Jul 7, 16:50 UTCJul 7, 18:05 UTC1h 15m
2026-07-07 UCA4297 - Jul 7, 14:45 UTCJul 7, 15:50 UTC1h 5m
2026-07-07 UCA4917 - Jul 7, 11:30 UTCJul 7, 12:45 UTC1h 15m
2026-07-06 UCA4855 - Jul 6, 23:30 UTCJul 7, 00:50 UTC1h 20m
2026-07-06 UCA4827 AMA → IAH Jul 6, 20:32 UTCJul 6, 21:50 UTC1h 18m
2026-07-06 UCA3265 - Jul 6, 18:20 UTCJul 6, 19:20 UTC1h 0m
2026-07-06 UCA4878 - Jul 6, 16:10 UTCJul 6, 17:15 UTC1h 5m
2026-07-06 UCA4878 MOB → IAH Jul 6, 16:11 UTCJul 6, 17:11 UTC1h 0m
2026-07-05 UCA4323 - Jul 5, 22:05 UTCJul 5, 23:15 UTC1h 10m
2026-07-04 UCA4980 - Jul 4, 19:15 UTCJul 4, 20:05 UTC50m
2026-07-04 UCA4287 - Jul 4, 17:30 UTCJul 4, 18:10 UTC40m
2026-07-04 UCA4989 MOB → IAH Jul 4, 14:10 UTCJul 4, 15:20 UTC1h 10m
2026-07-04 UCA4312 - Jul 4, 01:35 UTCJul 4, 02:25 UTC50m
2026-07-03 UCA4909 - Jul 3, 16:30 UTCJul 3, 17:55 UTC1h 25m
2026-07-03 UCA4262 IAD → HSV Jul 3, 13:20 UTCJul 3, 14:50 UTC1h 30m
2026-07-03 UCA4251 - Jul 3, 10:35 UTCJul 3, 11:15 UTC40m
2026-07-03 UCA4849 - Jul 3, 02:35 UTCJul 3, 03:15 UTC40m

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 N17159 page for operator, model, and routing details .

Mode-S A1200D frequently asked

What is Mode-S code A1200D?
A1200D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17159.
Where is Mode-S A1200D registered?
Mode-S code A1200D 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 A1200D broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1200D, octal 50220015, decimal 10,559,501.
What flights does A1200D operate?
Mode-S A1200D has broadcast 20 distinct callsigns, including UCA4878, UCA4377, UCA4352, UCA4846, UCA4838.