Apparatus

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sensors Mode-S transponder

A0F86B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N16149 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A0F86B
Octal
50174153
Decimal
10,549,355
Country
US
Tail
N16149
Type
E45X
No current signal · last broadcast 2h ago
Flights observed
609
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A0F86B.

Country allocation

The ICAO 24-bit address A0F86B 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
UCA4946 - 7 2026-07-09
UCA4342 - 7 2026-07-12
UCA4930 - 6 2026-07-12
UCA4925 - 6 2026-07-12
UCA4328 - 6 2026-06-19
UCA4321 - 6 2026-06-24
UCA4308 - 6 2026-06-23
UCA4281 - 6 2026-06-22
UCA4265 - 6 2026-07-12
UCA4234 - 6 2026-06-30
UCA4233 CommutAir 6 2026-06-07
UCA4230 - 6 2026-06-30
UCA4227 - 6 2026-07-11
UCA4986 - 5 2026-07-12
UCA4985 CommutAir 5 2026-06-08
UCA4974 - 5 2026-07-12
UCA4965 - 5 2026-07-11
UCA4932 - 5 2026-07-12
UCA4861 CommutAir 5 2026-06-22
UCA4858 - 5 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UCA4853 - Jul 14, 00:00 UTCJul 14, 00:45 UTC45m
2026-07-13 UCA4977 - Jul 13, 21:50 UTCJul 13, 22:35 UTC45m
2026-07-13 UCA4268 - Jul 13, 19:00 UTCJul 13, 19:25 UTC25m
2026-07-13 UCA4268 MDT → IAD Jul 13, 19:04 UTCJul 13, 19:25 UTC21m
2026-07-13 UCA4372 - Jul 13, 16:55 UTCJul 13, 17:20 UTC25m
2026-07-13 UCA4332 ROA → IAD Jul 13, 14:35 UTCJul 13, 15:20 UTC45m
2026-07-13 UCA4368 IAD → ROA Jul 13, 12:55 UTCJul 13, 13:35 UTC40m
2026-07-13 UCA4251 - Jul 13, 10:25 UTCJul 13, 10:45 UTC20m
2026-07-13 UCA4251 GSO → IAD Jul 13, 10:31 UTCJul 13, 11:10 UTC39m
2026-07-13 UCA4849 - Jul 13, 04:15 UTCJul 13, 05:01 UTC45m
2026-07-13 UCA4829 - Jul 13, 01:50 UTCJul 13, 03:05 UTC1h 15m
2026-07-13 UCA4829 MHT → IAD Jul 13, 01:55 UTCJul 13, 03:06 UTC1h 11m
2026-07-12 UCA4932 IAD → MHT Jul 12, 23:53 UTCJul 13, 00:51 UTC58m
2026-07-12 UCA4932 IAD → MHT Jul 12, 23:50 UTCJul 13, 01:01 UTC1h 10m
2026-07-12 UCA4925 - Jul 12, 18:55 UTCJul 12, 20:15 UTC1h 20m
2026-07-12 UCA4930 IAD → MHT Jul 12, 16:50 UTCJul 12, 17:55 UTC1h 5m
2026-07-12 UCA4930 IAD → MHT Jul 12, 16:45 UTCJul 12, 17:50 UTC1h 5m
2026-07-12 UCA4974 - Jul 12, 14:55 UTCJul 12, 15:30 UTC35m
2026-07-12 UCA4974 MDT → IAD Jul 12, 14:42 UTCJul 12, 15:33 UTC51m
2026-07-12 UCA4986 - Jul 12, 13:30 UTCJul 12, 13:55 UTC25m
2026-07-12 UCA4342 - Jul 12, 10:30 UTCJul 12, 10:50 UTC20m
2026-07-12 UCA4265 - Jul 12, 03:40 UTCJul 12, 03:50 UTC10m
2026-07-12 UCA4247 - Jul 12, 00:25 UTCJul 12, 02:01 UTC1h 35m
2026-07-12 UCA4247 BDL → IAD Jul 12, 00:14 UTCJul 12, 01:58 UTC1h 44m
2026-07-11 UCA4267 IAD → BDL Jul 11, 21:45 UTCJul 11, 22:50 UTC1h 5m
2026-07-11 UCA4237 - Jul 11, 19:05 UTCJul 11, 20:25 UTC1h 20m
2026-07-11 UCA4333 IAD → BTV Jul 11, 16:45 UTCJul 11, 18:00 UTC1h 15m
2026-07-11 UCA4227 - Jul 11, 14:45 UTCJul 11, 15:30 UTC45m
2026-07-11 UCA4965 - Jul 11, 13:00 UTCJul 11, 13:35 UTC35m
2026-07-11 UCA4922 ROA → IAD Jul 11, 10:30 UTCJul 11, 11:15 UTC45m
2026-07-11 UCA4922 ROA → IAD Jul 11, 10:31 UTCJul 11, 11:14 UTC43m
2026-07-11 UCA4897 IAD → ROA Jul 11, 02:48 UTCJul 11, 03:06 UTC18m
2026-07-11 UCA4897 IAD → ROA Jul 11, 02:35 UTCJul 11, 03:10 UTC35m
2026-07-10 UCA4332 ROA → IAD Jul 10, 23:00 UTCJul 10, 23:40 UTC40m
2026-07-10 UCA4368 IAD → ROA Jul 10, 21:40 UTCJul 10, 22:15 UTC35m
2026-07-10 UCA4938 - Jul 10, 19:20 UTCJul 10, 19:55 UTC35m
2026-07-10 UCA4253 - Jul 10, 17:35 UTCJul 10, 18:05 UTC30m
2026-07-10 UCA4324 - Jul 10, 14:45 UTCJul 10, 15:40 UTC55m
2026-07-10 UCA4236 - Jul 10, 12:35 UTCJul 10, 13:35 UTC1h 0m
2026-07-09 UCA4351 - Jul 9, 23:10 UTCJul 10, 00:45 UTC1h 35m
2026-07-09 UCA4946 - Jul 9, 20:25 UTCJul 9, 22:00 UTC1h 35m
2026-07-09 UCA4946 IAH → HSV Jul 9, 20:27 UTCJul 9, 21:59 UTC1h 32m
2026-07-09 UCA4928 - Jul 9, 17:15 UTCJul 9, 18:00 UTC45m
2026-07-09 UCA4894 - Jul 9, 15:20 UTCJul 9, 16:00 UTC40m
2026-07-09 UCA4894 IAH → CRP Jul 9, 15:27 UTCJul 9, 16:00 UTC33m
2026-07-09 UCA4255 - Jul 9, 11:30 UTCJul 9, 12:55 UTC1h 25m
2026-07-08 UCA4902 - Jul 8, 19:40 UTCJul 8, 21:00 UTC1h 20m
2026-07-08 UCA4356 - Jul 8, 17:10 UTCJul 8, 17:50 UTC40m
2026-07-08 UCA4906 - Jul 8, 15:20 UTCJul 8, 15:50 UTC30m
2026-07-08 UCA4299 - Jul 8, 11:55 UTCJul 8, 13:20 UTC1h 25m

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 N16149 page for operator, model, and routing details .

Mode-S A0F86B frequently asked

What is Mode-S code A0F86B?
A0F86B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N16149.
Where is Mode-S A0F86B registered?
Mode-S code A0F86B 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 A0F86B broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0F86B, octal 50174153, decimal 10,549,355.
What flights does A0F86B operate?
Mode-S A0F86B has broadcast 20 distinct callsigns, including UCA4946, UCA4342, UCA4930, UCA4925, UCA4328.