Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A0F8D3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N16178 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A0F8D3
Octal
50174323
Decimal
10,549,459
Country
US
Tail
N16178
Type
E45X
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
685
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A0F8D3.

Country allocation

The ICAO 24-bit address A0F8D3 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
UCA4889 - 11 2026-06-29
UCA4970 - 9 2026-06-28
UCA4926 - 9 2026-06-20
UCA4348 CommutAir 9 2026-07-23
UCA4321 - 9 2026-06-28
UCA4959 - 8 2026-07-17
UCA4357 CommutAir 8 2026-06-05
UCA4244 - 8 2026-07-10
UCA4227 - 8 2026-06-24
UCA4965 - 7 2026-06-24
UCA4896 CommutAir 7 2026-07-26
UCA4814 CommutAir 7 2026-07-23
UCA4810 - 7 2026-06-27
UCA4289 CommutAir 7 2026-07-26
UCA4281 - 7 2026-07-17
UCA4252 - 7 2026-06-27
UCA4240 CommutAir 7 2026-07-20
UCA4989 CommutAir 6 2026-07-06
UCA4962 - 6 2026-07-17
UCA4823 CommutAir 6 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4867 TUL → IAH Jul 26, 21:55 UTCJul 26, 22:45 UTC50m
2026-07-26 UCA4289 ORF → IAD Jul 26, 19:20 UTCJul 26, 20:05 UTC45m
2026-07-26 UCA4896 IAH → JAN Jul 26, 17:15 UTCJul 26, 18:00 UTC45m
2026-07-26 UCA4224 AMA → IAH Jul 26, 14:35 UTCJul 26, 15:50 UTC1h 15m
2026-07-26 UCA4839 IAH → AMA Jul 26, 01:45 UTCJul 26, 02:45 UTC1h 0m
2026-07-26 UCA4839 IAH → AMA Jul 26, 01:52 UTCJul 26, 02:59 UTC1h 7m
2026-07-25 UCA4246 GPT → IAH Jul 25, 23:25 UTCJul 26, 00:25 UTC1h 0m
2026-07-25 UCA4273 IAH → GPT Jul 25, 21:30 UTCJul 25, 22:25 UTC55m
2026-07-25 UCA4928 CRP → IAH Jul 25, 17:10 UTCJul 25, 17:55 UTC45m
2026-07-25 UCA4928 CRP → IAH Jul 25, 17:22 UTCJul 25, 17:53 UTC31m
2026-07-25 UCA4894 IAH → CRP Jul 25, 15:30 UTCJul 25, 16:10 UTC40m
2026-07-25 UCA4226 LRD → IAH Jul 25, 12:33 UTCJul 25, 13:26 UTC53m
2026-07-25 UCA4226 LRD → IAH Jul 25, 12:25 UTCJul 25, 13:25 UTC1h 0m
2026-07-25 UCA4892 IAH → LRD Jul 25, 02:50 UTCJul 25, 03:40 UTC50m
2026-07-25 UCA4892 IAH → LRD Jul 25, 02:57 UTCJul 25, 03:41 UTC44m
2026-07-25 UCA4228 - Jul 25, 00:00 UTCJul 25, 01:20 UTC1h 20m
2026-07-24 UCA4256 IAH → BHM Jul 24, 21:30 UTCJul 24, 22:50 UTC1h 20m
2026-07-24 UCA4289 ORF → IAD Jul 24, 19:20 UTCJul 24, 20:10 UTC50m
2026-07-24 UCA4896 IAH → JAN Jul 24, 17:10 UTCJul 24, 17:55 UTC45m
2026-07-24 UCA4269 PVD → IAD Jul 24, 14:15 UTCJul 24, 15:40 UTC1h 25m
2026-07-24 UCA4292 IAH → HSV Jul 24, 01:20 UTCJul 24, 02:50 UTC1h 30m
2026-07-23 UCA4348 JAN → IAH Jul 23, 22:30 UTCJul 23, 23:50 UTC1h 20m
2026-07-23 UCA4348 JAN → IAH Jul 23, 22:24 UTCJul 23, 23:45 UTC1h 21m
2026-07-23 UCA4814 PVD → IAD Jul 23, 19:55 UTCJul 23, 20:45 UTC50m
2026-07-23 UCA4258 CVG → IAD Jul 23, 16:50 UTCJul 23, 18:15 UTC1h 25m
2026-07-23 UCA4293 IAH → PNS Jul 23, 13:10 UTCJul 23, 14:25 UTC1h 15m
2026-07-23 UCA4248 BHM → IAH Jul 23, 10:35 UTCJul 23, 11:25 UTC50m
2026-07-22 UCA4836 IAH → BTR Jul 22, 23:50 UTCJul 23, 00:35 UTC45m
2026-07-22 UCA4816 AMA → IAH Jul 22, 20:00 UTCJul 22, 21:10 UTC1h 10m
2026-07-22 UCA4816 AMA → IAH Jul 22, 20:04 UTCJul 22, 21:08 UTC1h 4m
2026-07-22 UCA4821 IAH → AMA Jul 22, 15:30 UTCJul 22, 16:35 UTC1h 5m
2026-07-21 UCA4363 - Jul 21, 00:55 UTCJul 21, 01:35 UTC40m
2026-07-21 UCA4363 CRP → IAH Jul 21, 01:00 UTCJul 21, 01:33 UTC33m
2026-07-20 UCA4811 - Jul 20, 23:35 UTCJul 21, 00:15 UTC40m
2026-07-20 UCA4811 IAH → CRP Jul 20, 23:48 UTCJul 21, 00:11 UTC23m
2026-07-20 UCA4905 HSV → IAH Jul 20, 20:05 UTCJul 20, 21:20 UTC1h 15m
2026-07-20 UCA4286 PWM → IAD Jul 20, 17:20 UTCJul 20, 18:45 UTC1h 25m
2026-07-20 UCA4240 HSV → IAD Jul 20, 13:15 UTCJul 20, 14:50 UTC1h 35m
2026-07-20 UCA4240 HSV → IAD Jul 20, 13:20 UTCJul 20, 14:47 UTC1h 27m
2026-07-19 UCA4284 - Jul 19, 23:55 UTCJul 20, 01:20 UTC1h 25m
2026-07-19 UCA4893 - Jul 19, 21:30 UTCJul 19, 22:55 UTC1h 25m
2026-07-19 UCA4893 HSV → IAH Jul 19, 21:43 UTCJul 19, 22:52 UTC1h 9m
2026-07-19 UCA4879 GPT → IAH Jul 19, 18:50 UTCJul 19, 20:15 UTC1h 25m
2026-07-19 UCA4822 BHM → IAH Jul 19, 16:30 UTCJul 19, 17:45 UTC1h 15m
2026-07-19 UCA4231 SGF → IAH Jul 19, 12:50 UTCJul 19, 14:05 UTC1h 15m
2026-07-18 UCA4996 - Jul 18, 22:30 UTCJul 19, 00:00 UTC1h 30m
2026-07-18 UCA4911 - Jul 18, 19:50 UTCJul 18, 21:00 UTC1h 10m
2026-07-18 UCA4909 - Jul 18, 16:45 UTCJul 18, 18:10 UTC1h 25m
2026-07-18 UCA4262 IAD → STL Jul 18, 13:55 UTCJul 18, 15:20 UTC1h 25m
2026-07-18 UCA4939 - Jul 18, 10:10 UTCJul 18, 10:55 UTC45m

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 N16178 page for operator, model, and routing details .

Mode-S A0F8D3 frequently asked

What is Mode-S code A0F8D3?
A0F8D3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N16178.
Where is Mode-S A0F8D3 registered?
Mode-S code A0F8D3 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 A0F8D3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0F8D3, octal 50174323, decimal 10,549,459.
What flights does A0F8D3 operate?
Mode-S A0F8D3 has broadcast 20 distinct callsigns, including UCA4889, UCA4970, UCA4926, UCA4348, UCA4321.