Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 1h ago
Flights observed
558
Distinct callsigns
20
Country
US
Last broadcast
1h ago

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 - 9 2026-07-06
UCA4248 CommutAir 8 2026-05-11
UCA4245 CommutAir 8 2026-06-12
UCA4829 CommutAir 7 2026-05-22
UCA4320 - 7 2026-07-08
UCA4938 - 6 2026-06-23
UCA4878 - 6 2026-06-26
UCA4867 - 6 2026-07-13
UCA4852 - 6 2026-07-14
UCA4333 CommutAir 6 2026-05-17
UCA4314 CommutAir 6 2026-06-22
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
UCA4909 - 5 2026-07-01
UCA4872 CommutAir 5 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UCA4277 - Jul 14, 20:15 UTCJul 14, 21:45 UTC1h 30m
2026-07-14 UCA4276 - Jul 14, 17:45 UTCJul 14, 19:25 UTC1h 40m
2026-07-14 UCA4852 - Jul 14, 15:30 UTCJul 14, 16:10 UTC40m
2026-07-14 UCA4852 - Jul 14, 11:45 UTCJul 14, 13:45 UTC2h 0m
2026-07-13 UCA4867 - Jul 13, 22:40 UTCJul 14, 00:10 UTC1h 30m
2026-07-13 UCA4867 IAH → SGF Jul 13, 22:44 UTCJul 14, 00:10 UTC1h 26m
2026-07-13 UCA4277 - Jul 13, 19:05 UTCJul 13, 21:15 UTC2h 10m
2026-07-13 UCA4277 PBC → IAH Jul 13, 18:57 UTCJul 13, 21:06 UTC2h 9m
2026-07-13 UCA4276 - Jul 13, 16:10 UTCJul 13, 18:00 UTC1h 50m
2026-07-13 UCA4917 - Jul 13, 11:35 UTCJul 13, 13:00 UTC1h 25m
2026-07-12 UCA4855 - Jul 12, 23:35 UTCJul 13, 00:55 UTC1h 20m
2026-07-12 UCA4249 - Jul 12, 21:45 UTCJul 12, 22:25 UTC40m
2026-07-12 UCA4249 LFT → IAH Jul 12, 21:39 UTCJul 12, 22:23 UTC44m
2026-07-12 UCA4224 - Jul 12, 20:01 UTCJul 12, 20:35 UTC35m
2026-07-10 UCA4330 - Jul 10, 16:35 UTCJul 10, 16:55 UTC20m
2026-07-10 UCA4985 - Jul 10, 02:00 UTCJul 10, 02:15 UTC15m
2026-07-09 UCA4379 - Jul 9, 21:50 UTCJul 9, 22:45 UTC55m
2026-07-09 UCA4366 - Jul 9, 19:55 UTCJul 9, 20:45 UTC50m
2026-07-09 UCA4830 - Jul 9, 17:15 UTCJul 9, 18:10 UTC55m
2026-07-09 UCA4371 - Jul 9, 14:55 UTCJul 9, 15:40 UTC45m
2026-07-09 UCA4852 - Jul 9, 11:40 UTCJul 9, 13:00 UTC1h 20m
2026-07-08 UCA4867 - Jul 8, 23:05 UTCJul 9, 00:20 UTC1h 15m
2026-07-08 UCA4867 IAH → SGF Jul 8, 22:29 UTCJul 9, 00:16 UTC1h 47m
2026-07-08 UCA4361 - Jul 8, 19:05 UTCJul 8, 20:10 UTC1h 5m
2026-07-08 UCA4344 IAH → HRL Jul 8, 15:10 UTCJul 8, 16:20 UTC1h 10m
2026-07-08 UCA4344 IAH → HRL Jul 8, 15:06 UTCJul 8, 16:11 UTC1h 5m
2026-07-08 UCA4318 - Jul 8, 12:50 UTCJul 8, 13:35 UTC45m
2026-07-08 UCA4320 - Jul 8, 02:50 UTCJul 8, 03:35 UTC45m
2026-07-07 UCA4923 - Jul 7, 22:50 UTCJul 8, 00:10 UTC1h 20m
2026-07-07 UCA4307 - Jul 7, 20:00 UTCJul 7, 21:05 UTC1h 5m
2026-07-07 UCA4307 IAH → MOB Jul 7, 20:04 UTCJul 7, 21:06 UTC1h 2m
2026-07-07 UCA4258 - Jul 7, 16:45 UTCJul 7, 18:05 UTC1h 20m
2026-07-07 UCA4293 - Jul 7, 13:20 UTCJul 7, 14:35 UTC1h 15m
2026-07-07 UCA4293 IAH → PNS Jul 7, 13:16 UTCJul 7, 14:32 UTC1h 16m
2026-07-06 UCA4842 - Jul 6, 22:15 UTCJul 6, 23:45 UTC1h 30m
2026-07-06 UCA4842 ECP → IAH Jul 6, 22:18 UTCJul 6, 23:40 UTC1h 22m
2026-07-06 UCA4902 - Jul 6, 19:55 UTCJul 6, 21:10 UTC1h 15m
2026-07-06 UCA4329 - Jul 6, 17:25 UTCJul 6, 18:25 UTC1h 0m
2026-07-06 UCA4329 BRO → IAH Jul 6, 17:28 UTCJul 6, 18:13 UTC45m
2026-07-06 UCA4813 IAH → BRO Jul 6, 15:20 UTCJul 6, 16:05 UTC45m
2026-07-06 UCA4844 - Jul 6, 12:30 UTCJul 6, 13:40 UTC1h 10m
2026-07-06 UCA4312 - Jul 6, 02:30 UTCJul 6, 03:35 UTC1h 5m
2026-07-06 UCA4312 IAH → MOB Jul 6, 01:43 UTCJul 6, 03:35 UTC1h 52m
2026-07-05 UCA4841 - Jul 5, 22:25 UTCJul 5, 23:30 UTC1h 5m
2026-07-05 UCA4850 - Jul 5, 20:05 UTCJul 5, 21:10 UTC1h 5m
2026-07-05 UCA4330 - Jul 5, 13:40 UTCJul 5, 13:55 UTC15m
2026-07-04 UCA4921 - Jul 4, 17:45 UTCJul 4, 17:55 UTC10m
2026-07-04 UCA4947 - Jul 4, 14:50 UTCJul 4, 15:35 UTC45m
2026-07-04 UCA4947 BTR → IAH Jul 4, 14:47 UTCJul 4, 15:36 UTC49m
2026-07-03 UCA4278 - Jul 3, 21:50 UTCJul 3, 22:30 UTC40m

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 1h ago.
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, UCA4829, UCA4320.