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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 Jul 26, 21:35 UTC
Flights observed
693
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:35 UTC

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
UCA4281 - 8 2026-07-14
UCA4946 - 7 2026-07-09
UCA4822 - 7 2026-07-18
UCA4342 - 7 2026-07-12
UCA4233 CommutAir 7 2026-07-23
UCA4930 - 6 2026-07-12
UCA4925 - 6 2026-07-12
UCA4333 - 6 2026-07-14
UCA4328 - 6 2026-06-19
UCA4327 - 6 2026-07-14
UCA4321 - 6 2026-06-24
UCA4308 - 6 2026-06-23
UCA4287 CommutAir 6 2026-07-22
UCA4265 - 6 2026-07-12
UCA4234 - 6 2026-06-30
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4242 CHA → TYS Jul 26, 20:20 UTCJul 26, 21:35 UTC1h 15m
2026-07-26 UCA4263 IAH → MLM Jul 26, 17:30 UTCJul 26, 19:10 UTC1h 40m
2026-07-25 UCA4816 AMA → IAH Jul 25, 20:30 UTCJul 25, 21:40 UTC1h 10m
2026-07-25 UCA4816 AMA → IAH Jul 25, 20:38 UTCJul 25, 21:42 UTC1h 4m
2026-07-25 UCA4817 IAH → AMA Jul 25, 17:40 UTCJul 25, 18:40 UTC1h 0m
2026-07-25 UCA4817 IAH → AMA Jul 25, 17:47 UTCJul 25, 18:53 UTC1h 6m
2026-07-25 UCA4269 PVD → IAD Jul 25, 14:20 UTCJul 25, 15:40 UTC1h 20m
2026-07-25 UCA4292 IAH → HSV Jul 25, 01:00 UTCJul 25, 02:20 UTC1h 20m
2026-07-24 UCA4842 - Jul 24, 22:15 UTCJul 24, 23:40 UTC1h 25m
2026-07-24 UCA4902 IAD → PHL Jul 24, 19:40 UTCJul 24, 20:55 UTC1h 15m
2026-07-24 UCA4851 - Jul 24, 17:25 UTCJul 24, 18:45 UTC1h 20m
2026-07-24 UCA4225 IAH → LCH Jul 24, 15:15 UTCJul 24, 16:45 UTC1h 30m
2026-07-24 UCA4228 - Jul 24, 00:20 UTCJul 24, 01:45 UTC1h 25m
2026-07-23 UCA4256 IAH → BHM Jul 23, 21:40 UTCJul 23, 23:10 UTC1h 30m
2026-07-23 UCA4243 ORF → IAD Jul 23, 19:40 UTCJul 23, 20:40 UTC1h 0m
2026-07-23 UCA4272 IAH → GPT Jul 23, 17:30 UTCJul 23, 18:25 UTC55m
2026-07-23 UCA4233 HSV → IAH Jul 23, 14:35 UTCJul 23, 15:55 UTC1h 20m
2026-07-23 UCA4279 ORF → IAD Jul 23, 01:05 UTCJul 23, 02:10 UTC1h 5m
2026-07-22 UCA4980 BTR → IAH Jul 22, 19:20 UTCJul 22, 20:20 UTC1h 0m
2026-07-22 UCA4287 IAH → HRL Jul 22, 17:25 UTCJul 22, 18:05 UTC40m
2026-07-22 UCA4947 BTR → IAH Jul 22, 14:40 UTCJul 22, 15:20 UTC40m
2026-07-22 UCA4260 - Jul 22, 12:45 UTCJul 22, 13:40 UTC55m
2026-07-21 UCA4247 PVD → IAD Jul 21, 23:15 UTCJul 22, 00:00 UTC45m
2026-07-21 UCA4341 PWM → IAD Jul 21, 21:30 UTCJul 21, 22:05 UTC35m
2026-07-20 UCA4984 IAH → AMA Jul 20, 23:35 UTCJul 20, 23:45 UTC10m
2026-07-20 UCA4375 BTR → IAH Jul 20, 21:40 UTCJul 20, 21:55 UTC15m
2026-07-20 UCA4375 BTR → IAH Jul 20, 21:49 UTCJul 20, 22:07 UTC18m
2026-07-20 UCA4374 - Jul 20, 19:15 UTCJul 20, 20:10 UTC55m
2026-07-20 UCA4904 - Jul 20, 17:15 UTCJul 20, 18:15 UTC1h 0m
2026-07-20 UCA4904 IAH → LRD Jul 20, 17:29 UTCJul 20, 18:06 UTC37m
2026-07-20 UCA4376 IAD → BTV Jul 20, 14:55 UTCJul 20, 15:50 UTC55m
2026-07-20 UCA4355 IAD → PVD Jul 20, 12:40 UTCJul 20, 13:35 UTC55m
2026-07-20 UCA4941 BTR → IAH Jul 20, 10:10 UTCJul 20, 10:55 UTC45m
2026-07-20 UCA4941 BTR → IAH Jul 20, 10:12 UTCJul 20, 10:54 UTC42m
2026-07-20 UCA4254 IAH → BTR Jul 20, 01:38 UTCJul 20, 02:15 UTC37m
2026-07-19 UCA4841 TYS → IAH Jul 19, 22:21 UTCJul 19, 23:07 UTC46m
2026-07-19 UCA4841 TYS → IAH Jul 19, 22:05 UTCJul 19, 23:10 UTC1h 5m
2026-07-19 UCA4850 - Jul 19, 19:55 UTCJul 19, 21:00 UTC1h 5m
2026-07-19 UCA4830 LIT → IAH Jul 19, 17:20 UTCJul 19, 18:15 UTC55m
2026-07-19 UCA4830 LIT → IAH Jul 19, 17:13 UTCJul 19, 18:12 UTC59m
2026-07-19 UCA4371 IAD → BDL Jul 19, 14:55 UTCJul 19, 15:45 UTC50m
2026-07-19 UCA4255 - Jul 19, 11:35 UTCJul 19, 13:00 UTC1h 25m
2026-07-19 UCA4255 ECP → IAH Jul 19, 11:43 UTCJul 19, 13:03 UTC1h 20m
2026-07-19 UCA4343 IAH → ECP Jul 19, 01:19 UTCJul 19, 02:45 UTC1h 26m
2026-07-18 UCA4345 - Jul 18, 21:20 UTCJul 18, 22:05 UTC45m
2026-07-18 UCA4352 - Jul 18, 19:25 UTCJul 18, 20:10 UTC45m
2026-07-18 UCA4352 IAH → BTR Jul 18, 19:39 UTCJul 18, 20:05 UTC26m
2026-07-18 UCA4822 - Jul 18, 16:25 UTCJul 18, 17:50 UTC1h 25m
2026-07-18 UCA4822 BHM → IAH Jul 18, 16:36 UTCJul 18, 17:47 UTC1h 11m
2026-07-18 UCA4231 - Jul 18, 12:50 UTCJul 18, 14:10 UTC1h 20m

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 Jul 26, 21:35 UTC.
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 UCA4281, UCA4946, UCA4822, UCA4342, UCA4233.