Apparatus

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sensors Mode-S transponder

A0339F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N11199 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A0339F
Octal
50031637
Decimal
10,498,975
Country
US
Tail
N11199
Type
E45X
No current signal · last broadcast Jul 26, 20:45 UTC
Flights observed
630
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:45 UTC

Last known position

Most recent position reported by Mode-S A0339F.

Country allocation

The ICAO 24-bit address A0339F 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
UCA4312 CommutAir 10 2026-07-22
UCA4248 CommutAir 8 2026-05-11
UCA4245 CommutAir 8 2026-06-12
UCA4878 - 7 2026-07-16
UCA4829 CommutAir 7 2026-05-22
UCA4320 - 7 2026-07-08
UCA4938 - 6 2026-06-23
UCA4909 CommutAir 6 2026-07-26
UCA4867 - 6 2026-07-13
UCA4852 - 6 2026-07-14
UCA4333 CommutAir 6 2026-05-17
UCA4314 CommutAir 6 2026-06-22
UCA4282 - 6 2026-07-15
UCA4277 - 6 2026-07-14
UCA4253 - 6 2026-06-23
UCA4249 - 6 2026-07-12
UCA4229 - 6 2026-06-29
UCA4962 - 5 2026-04-19
UCA4959 CommutAir 5 2026-04-19
UCA4932 CommutAir 5 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4850 IAH → ELP Jul 26, 19:45 UTCJul 26, 20:45 UTC1h 0m
2026-07-26 UCA4909 HSV → IAH Jul 26, 16:20 UTCJul 26, 17:45 UTC1h 25m
2026-07-26 UCA4262 IAD → STL Jul 26, 13:10 UTCJul 26, 14:35 UTC1h 25m
2026-07-26 UCA4262 IAD → STL Jul 26, 13:17 UTCJul 26, 14:34 UTC1h 17m
2026-07-26 UCA4270 MFE → IAH Jul 26, 00:25 UTCJul 26, 01:10 UTC45m
2026-07-25 UCA4823 PVD → IAD Jul 25, 22:30 UTCJul 25, 23:20 UTC50m
2026-07-25 UCA4831 IAD → ROA Jul 25, 19:10 UTCJul 25, 19:50 UTC40m
2026-07-25 UCA4240 HSV → IAD Jul 25, 17:20 UTCJul 25, 17:55 UTC35m
2026-07-25 UCA4922 ROA → IAD Jul 25, 10:25 UTCJul 25, 11:10 UTC45m
2026-07-25 UCA4897 IAD → ROA Jul 25, 03:05 UTCJul 25, 03:45 UTC40m
2026-07-25 UCA4897 IAD → ROA Jul 25, 02:48 UTCJul 25, 03:42 UTC54m
2026-07-25 UCA4810 IAH → TYS Jul 25, 00:20 UTCJul 25, 01:00 UTC40m
2026-07-24 UCA4308 CRP → IAH Jul 24, 22:08 UTCJul 24, 22:39 UTC31m
2026-07-24 UCA4308 CRP → IAH Jul 24, 22:05 UTCJul 24, 22:45 UTC40m
2026-07-24 UCA4942 ALB → IAD Jul 24, 19:25 UTCJul 24, 20:25 UTC1h 0m
2026-07-24 UCA4317 IAD → ALB Jul 24, 17:00 UTCJul 24, 17:55 UTC55m
2026-07-24 UCA4857 - Jul 24, 13:35 UTCJul 24, 14:50 UTC1h 15m
2026-07-24 UCA4270 MFE → IAH Jul 24, 02:20 UTCJul 24, 03:25 UTC1h 5m
2026-07-24 UCA4954 ITH → IAD Jul 24, 00:06 UTCJul 24, 00:45 UTC39m
2026-07-23 UCA4945 IAD → ITH Jul 23, 22:05 UTCJul 23, 22:45 UTC40m
2026-07-23 UCA4925 - Jul 23, 18:50 UTCJul 23, 20:10 UTC1h 20m
2026-07-23 UCA4930 IAD → MHT Jul 23, 16:30 UTCJul 23, 17:35 UTC1h 5m
2026-07-23 UCA4974 MDT → IAD Jul 23, 14:35 UTCJul 23, 15:05 UTC30m
2026-07-23 UCA4974 MDT → IAD Jul 23, 14:42 UTCJul 23, 15:05 UTC23m
2026-07-23 UCA4986 IAD → MDT Jul 23, 13:05 UTCJul 23, 13:30 UTC25m
2026-07-23 UCA4986 IAD → MDT Jul 23, 12:56 UTCJul 23, 13:26 UTC30m
2026-07-22 UCA4340 HSV → IAD Jul 22, 19:05 UTCJul 22, 20:30 UTC1h 25m
2026-07-22 UCA4315 IAH → HSV Jul 22, 16:10 UTCJul 22, 17:40 UTC1h 30m
2026-07-22 UCA4844 PWM → IAD Jul 22, 12:20 UTCJul 22, 13:25 UTC1h 5m
2026-07-22 UCA4312 IAD → CVG Jul 22, 01:40 UTCJul 22, 02:50 UTC1h 10m
2026-07-21 UCA4348 JAN → IAH Jul 21, 22:30 UTCJul 21, 23:15 UTC45m
2026-07-21 UCA4348 JAN → IAH Jul 21, 22:24 UTCJul 21, 23:22 UTC58m
2026-07-21 UCA4814 PVD → IAD Jul 21, 19:55 UTCJul 21, 20:40 UTC45m
2026-07-21 UCA4356 LFT → IAH Jul 21, 17:20 UTCJul 21, 17:55 UTC35m
2026-07-21 UCA4906 IAH → LFT Jul 21, 15:25 UTCJul 21, 16:00 UTC35m
2026-07-21 UCA4264 - Jul 21, 12:45 UTCJul 21, 13:30 UTC45m
2026-07-21 UCA4254 DEN → SHV Jul 21, 01:25 UTCJul 21, 02:10 UTC45m
2026-07-20 UCA4242 - Jul 20, 20:15 UTCJul 20, 21:35 UTC1h 20m
2026-07-20 UCA4263 IAH → MLM Jul 20, 17:45 UTCJul 20, 19:15 UTC1h 30m
2026-07-20 UCA4224 AMA → IAH Jul 20, 14:20 UTCJul 20, 15:40 UTC1h 20m
2026-07-20 UCA4839 - Jul 20, 01:55 UTCJul 20, 03:00 UTC1h 5m
2026-07-20 UCA4839 IAH → AMA Jul 20, 01:52 UTCJul 20, 03:11 UTC1h 19m
2026-07-19 UCA4348 - Jul 19, 22:30 UTCJul 19, 23:15 UTC45m
2026-07-19 UCA4348 JAN → IAH Jul 19, 22:24 UTCJul 19, 23:12 UTC48m
2026-07-19 UCA4814 - Jul 19, 20:05 UTCJul 19, 20:50 UTC45m
2026-07-19 UCA4814 IAH → JAN Jul 19, 20:04 UTCJul 19, 20:58 UTC54m
2026-07-19 UCA4300 LBB → IAH Jul 19, 17:10 UTCJul 19, 18:25 UTC1h 15m
2026-07-19 UCA4300 LBB → IAH Jul 19, 17:09 UTCJul 19, 18:22 UTC1h 13m
2026-07-19 UCA4261 IAH → LBB Jul 19, 14:57 UTCJul 19, 16:27 UTC1h 30m
2026-07-19 UCA4863 IAH → LRD Jul 19, 12:10 UTCJul 19, 13:25 UTC1h 15m

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 N11199 page for operator, model, and routing details .

Mode-S A0339F frequently asked

What is Mode-S code A0339F?
A0339F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N11199.
Where is Mode-S A0339F registered?
Mode-S code A0339F 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 A0339F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0339F, octal 50031637, decimal 10,498,975.
What flights does A0339F operate?
Mode-S A0339F has broadcast 20 distinct callsigns, including UCA4312, UCA4248, UCA4245, UCA4878, UCA4829.