Apparatus

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sensors Mode-S transponder

A0F8F1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N16183 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A0F8F1
Octal
50174361
Decimal
10,549,489
Country
US
Tail
N16183
Type
E45X
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
633
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S A0F8F1.

Country allocation

The ICAO 24-bit address A0F8F1 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
UCA4867 - 10 2026-07-15
UCA4852 - 9 2026-07-16
UCA4231 CommutAir 9 2026-07-22
UCA4355 CommutAir 8 2026-07-23
UCA4980 CommutAir 7 2026-07-23
UCA4816 CommutAir 7 2026-07-20
UCA4376 CommutAir 7 2026-07-23
UCA4356 - 6 2026-07-11
UCA4353 CommutAir 6 2026-07-23
UCA4346 - 6 2026-07-10
UCA4341 - 6 2026-06-25
UCA4286 CommutAir 6 2026-07-19
UCA4272 - 6 2026-07-15
UCA4255 - 6 2026-07-14
UCA4243 - 6 2026-07-15
UCA4234 - 6 2026-07-04
UCA4228 - 6 2026-07-12
UCA4985 CommutAir 5 2026-07-26
UCA4945 - 5 2026-07-03
UCA4905 CommutAir 5 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4872 BRO → IAH Jul 26, 19:50 UTCJul 26, 21:00 UTC1h 10m
2026-07-26 UCA4300 LBB → IAH Jul 26, 17:25 UTCJul 26, 18:35 UTC1h 10m
2026-07-26 UCA4261 IAH → LBB Jul 26, 14:50 UTCJul 26, 16:00 UTC1h 10m
2026-07-26 UCA4330 LCH → IAH Jul 26, 12:45 UTCJul 26, 13:15 UTC30m
2026-07-26 UCA4985 IAH → LCH Jul 26, 01:50 UTCJul 26, 02:10 UTC20m
2026-07-26 UCA4985 IAH → LCH Jul 26, 01:53 UTCJul 26, 02:29 UTC36m
2026-07-25 UCA4978 LBB → IAH Jul 25, 22:25 UTCJul 25, 23:35 UTC1h 10m
2026-07-25 UCA4280 CMH → IAD Jul 25, 20:00 UTCJul 25, 21:05 UTC1h 5m
2026-07-25 UCA4329 BRO → IAH Jul 25, 17:30 UTCJul 25, 18:20 UTC50m
2026-07-25 UCA4813 IAH → BRO Jul 25, 15:25 UTCJul 25, 16:10 UTC45m
2026-07-25 UCA4301 ICT → IAH Jul 25, 12:40 UTCJul 25, 13:35 UTC55m
2026-07-25 UCA4296 MOB → IAH Jul 25, 01:30 UTCJul 25, 02:20 UTC50m
2026-07-24 UCA4316 ICT → IAH Jul 24, 22:15 UTCJul 24, 23:35 UTC1h 20m
2026-07-24 UCA4316 ICT → IAH Jul 24, 22:16 UTCJul 24, 23:36 UTC1h 20m
2026-07-24 UCA4987 IAH → ICT Jul 24, 19:45 UTCJul 24, 21:10 UTC1h 25m
2026-07-24 UCA4338 IAD → CMH Jul 24, 16:55 UTCJul 24, 18:20 UTC1h 25m
2026-07-24 UCA4297 IAD → PVD Jul 24, 14:55 UTCJul 24, 16:05 UTC1h 10m
2026-07-24 UCA4232 MOB → IAH Jul 24, 12:40 UTCJul 24, 13:25 UTC45m
2026-07-24 UCA4232 MOB → IAH Jul 24, 12:31 UTCJul 24, 13:30 UTC59m
2026-07-24 UCA4919 IAH → TUL Jul 24, 02:35 UTCJul 24, 03:35 UTC1h 0m
2026-07-23 UCA4353 IAD → PVD Jul 23, 23:25 UTCJul 24, 00:25 UTC1h 0m
2026-07-23 UCA4353 IAD → PVD Jul 23, 23:20 UTCJul 24, 00:18 UTC58m
2026-07-23 UCA4278 IAD → CHS Jul 23, 21:40 UTCJul 23, 22:30 UTC50m
2026-07-23 UCA4980 BTR → IAH Jul 23, 19:20 UTCJul 23, 20:10 UTC50m
2026-07-23 UCA4287 IAH → HRL Jul 23, 17:30 UTCJul 23, 18:10 UTC40m
2026-07-23 UCA4376 IAD → BTV Jul 23, 15:15 UTCJul 23, 16:15 UTC1h 0m
2026-07-23 UCA4355 IAD → PVD Jul 23, 12:50 UTCJul 23, 13:40 UTC50m
2026-07-23 UCA4355 IAD → PVD Jul 23, 12:53 UTCJul 23, 13:45 UTC52m
2026-07-22 UCA4822 BHM → IAH Jul 22, 16:40 UTCJul 22, 17:55 UTC1h 15m
2026-07-22 UCA4231 SGF → IAH Jul 22, 12:50 UTCJul 22, 14:15 UTC1h 25m
2026-07-22 UCA4231 SGF → IAH Jul 22, 12:53 UTCJul 22, 14:12 UTC1h 19m
2026-07-21 UCA4365 - Jul 21, 22:05 UTCJul 21, 22:55 UTC50m
2026-07-21 UCA4365 BRO → IAH Jul 21, 22:03 UTCJul 21, 22:48 UTC45m
2026-07-21 UCA4929 LBB → IAH Jul 21, 20:10 UTCJul 21, 20:50 UTC40m
2026-07-21 UCA4929 LBB → IAH Jul 21, 19:54 UTCJul 21, 20:54 UTC1h 0m
2026-07-21 UCA4245 JAN → IAH Jul 21, 17:30 UTCJul 21, 18:15 UTC45m
2026-07-21 UCA4245 JAN → IAH Jul 21, 17:20 UTCJul 21, 18:15 UTC55m
2026-07-21 UCA4347 IAH → JAN Jul 21, 15:15 UTCJul 21, 16:00 UTC45m
2026-07-21 UCA4917 - Jul 21, 11:55 UTCJul 21, 13:25 UTC1h 30m
2026-07-20 UCA4855 IAH → BRO Jul 20, 23:30 UTCJul 21, 00:50 UTC1h 19m
2026-07-20 UCA4855 IAH → BRO Jul 20, 23:38 UTCJul 21, 00:52 UTC1h 14m
2026-07-20 UCA4816 AMA → IAH Jul 20, 20:35 UTCJul 20, 21:50 UTC1h 15m
2026-07-20 UCA4817 IAH → AMA Jul 20, 17:50 UTCJul 20, 18:55 UTC1h 5m
2026-07-20 UCA4331 IAD → CMH Jul 20, 14:50 UTCJul 20, 15:35 UTC45m
2026-07-19 UCA4266 - Jul 19, 23:55 UTCJul 20, 00:25 UTC30m
2026-07-19 UCA4905 HSV → IAH Jul 19, 21:30 UTCJul 19, 23:00 UTC1h 30m
2026-07-19 UCA4286 PWM → IAD Jul 19, 18:35 UTCJul 19, 20:15 UTC1h 40m
2026-07-19 UCA4286 PWM → IAD Jul 19, 18:30 UTCJul 19, 20:11 UTC1h 41m
2026-07-19 UCA4325 - Jul 19, 16:10 UTCJul 19, 17:20 UTC1h 10m
2026-07-19 UCA4304 - Jul 19, 14:15 UTCJul 19, 15:15 UTC1h 0m

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 N16183 page for operator, model, and routing details .

Mode-S A0F8F1 frequently asked

What is Mode-S code A0F8F1?
A0F8F1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N16183.
Where is Mode-S A0F8F1 registered?
Mode-S code A0F8F1 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 A0F8F1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0F8F1, octal 50174361, decimal 10,549,489.
What flights does A0F8F1 operate?
Mode-S A0F8F1 has broadcast 20 distinct callsigns, including UCA4867, UCA4852, UCA4231, UCA4355, UCA4980.