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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 Jul 26, 20:05 UTC
Flights observed
337
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:05 UTC

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
UCA4331 CommutAir 9 2026-07-25
UCA4266 CommutAir 8 2026-07-25
UCA4878 - 6 2026-07-12
UCA4377 - 6 2026-07-10
UCA4289 CommutAir 6 2026-07-21
UCA4838 - 5 2026-07-22
UCA4352 - 5 2026-06-28
UCA4947 CommutAir 4 2026-07-26
UCA4928 - 4 2026-07-15
UCA4904 CommutAir 4 2026-07-26
UCA4896 CommutAir 4 2026-07-21
UCA4846 CommutAir 4 2026-06-28
UCA4825 - 4 2026-07-10
UCA4376 CommutAir 4 2026-06-15
UCA4374 CommutAir 4 2026-07-26
UCA4356 CommutAir 4 2026-07-20
UCA4341 - 4 2026-06-21
UCA4260 CommutAir 4 2026-07-26
UCA4996 CommutAir 3 2026-06-19
UCA4980 - 3 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4374 LRD → IAH Jul 26, 19:15 UTCJul 26, 20:05 UTC50m
2026-07-26 UCA4904 IAH → LRD Jul 26, 17:35 UTCJul 26, 18:25 UTC50m
2026-07-26 UCA4947 BTR → IAH Jul 26, 14:50 UTCJul 26, 15:40 UTC50m
2026-07-26 UCA4260 IAH → LIT Jul 26, 12:55 UTCJul 26, 13:40 UTC45m
2026-07-26 UCA4260 IAH → LIT Jul 26, 12:53 UTCJul 26, 13:38 UTC45m
2026-07-26 UCA4941 BTR → IAH Jul 26, 10:05 UTCJul 26, 10:45 UTC40m
2026-07-26 UCA4254 DEN → SHV Jul 26, 01:30 UTCJul 26, 02:20 UTC50m
2026-07-25 UCA4835 MFE → IAH Jul 25, 19:20 UTCJul 25, 20:10 UTC50m
2026-07-25 UCA4835 MFE → IAH Jul 25, 19:26 UTCJul 25, 20:11 UTC45m
2026-07-25 UCA4298 PVD → IAD Jul 25, 17:35 UTCJul 25, 18:20 UTC45m
2026-07-25 UCA4331 IAD → CMH Jul 25, 14:40 UTCJul 25, 15:20 UTC40m
2026-07-25 UCA4266 MFE → IAH Jul 25, 12:40 UTCJul 25, 13:20 UTC40m
2026-07-23 UCA4984 IAH → AMA Jul 23, 23:55 UTCJul 24, 00:30 UTC35m
2026-07-23 UCA4375 BTR → IAH Jul 23, 21:49 UTCJul 23, 22:28 UTC39m
2026-07-23 UCA4934 LCH → IAH Jul 23, 19:25 UTCJul 23, 19:50 UTC25m
2026-07-23 UCA4921 IAH → CRP Jul 23, 17:55 UTCJul 23, 18:15 UTC20m
2026-07-23 UCA4331 IAD → CMH Jul 23, 15:05 UTCJul 23, 15:55 UTC50m
2026-07-23 UCA4331 IAD → CMH Jul 23, 14:45 UTCJul 23, 15:48 UTC1h 3m
2026-07-22 UCA4266 MFE → IAH Jul 22, 22:35 UTCJul 22, 23:20 UTC45m
2026-07-22 UCA4838 - Jul 22, 19:40 UTCJul 22, 20:55 UTC1h 15m
2026-07-22 UCA4301 ICT → IAH Jul 22, 17:30 UTCJul 22, 18:35 UTC1h 5m
2026-07-22 UCA4301 ICT → IAH Jul 22, 17:32 UTCJul 22, 18:31 UTC59m
2026-07-22 UCA4331 IAD → CMH Jul 22, 14:45 UTCJul 22, 15:15 UTC30m
2026-07-22 UCA4331 IAD → CMH Jul 22, 14:45 UTCJul 22, 15:33 UTC48m
2026-07-21 UCA4266 MFE → IAH Jul 21, 22:20 UTCJul 21, 22:55 UTC35m
2026-07-21 UCA4266 MFE → IAH Jul 21, 22:27 UTCJul 21, 22:56 UTC29m
2026-07-21 UCA4289 ORF → IAD Jul 21, 19:25 UTCJul 21, 20:15 UTC50m
2026-07-21 UCA4289 ORF → IAD Jul 21, 19:20 UTCJul 21, 20:15 UTC55m
2026-07-21 UCA4896 IAH → JAN Jul 21, 17:25 UTCJul 21, 18:10 UTC45m
2026-07-21 UCA4269 PVD → IAD Jul 21, 14:20 UTCJul 21, 15:40 UTC1h 20m
2026-07-21 UCA4269 PVD → IAD Jul 21, 14:23 UTCJul 21, 15:41 UTC1h 18m
2026-07-21 UCA4292 - Jul 21, 01:15 UTCJul 21, 03:05 UTC1h 50m
2026-07-20 UCA4290 - Jul 20, 22:05 UTCJul 20, 23:15 UTC1h 10m
2026-07-20 UCA4290 TUL → IAH Jul 20, 22:13 UTCJul 20, 23:33 UTC1h 20m
2026-07-20 UCA4239 - Jul 20, 20:05 UTCJul 20, 21:15 UTC1h 10m
2026-07-20 UCA4356 LFT → IAH Jul 20, 17:05 UTCJul 20, 17:45 UTC40m
2026-07-20 UCA4356 LFT → IAH Jul 20, 17:20 UTCJul 20, 17:41 UTC21m
2026-07-20 UCA4906 IAH → LFT Jul 20, 15:15 UTCJul 20, 15:45 UTC30m
2026-07-18 UCA4934 - Jul 18, 19:30 UTCJul 18, 19:50 UTC20m
2026-07-18 UCA4921 - Jul 18, 17:35 UTCJul 18, 17:55 UTC20m
2026-07-18 UCA4282 IAD → TYS Jul 18, 14:45 UTCJul 18, 15:40 UTC55m
2026-07-18 UCA4334 - Jul 18, 00:00 UTCJul 18, 00:39 UTC40m
2026-07-17 UCA4346 IAD → YOW Jul 17, 12:40 UTCJul 17, 13:35 UTC55m
2026-07-17 UCA4309 - Jul 17, 01:45 UTCJul 17, 02:30 UTC45m
2026-07-17 UCA4309 IAH → BRO Jul 17, 01:48 UTCJul 17, 02:35 UTC47m
2026-07-16 UCA4984 IAH → AMA Jul 16, 23:25 UTCJul 16, 23:55 UTC30m
2026-07-16 UCA4375 BTR → IAH Jul 16, 21:40 UTCJul 16, 22:00 UTC20m
2026-07-16 UCA4375 BTR → IAH Jul 16, 21:49 UTCJul 16, 22:02 UTC13m
2026-07-16 UCA4374 LRD → IAH Jul 16, 19:22 UTCJul 16, 20:16 UTC54m
2026-07-16 UCA4374 - Jul 16, 19:10 UTCJul 16, 20:00 UTC50m

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 Jul 26, 20:05 UTC.
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 UCA4331, UCA4266, UCA4878, UCA4377, UCA4289.