Apparatus

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sensors Mode-S transponder

A03331

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N11164 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A03331
Octal
50031461
Decimal
10,498,865
Country
US
Tail
N11164
Type
E45X
No current signal · last broadcast 13d ago
Flights observed
595
Distinct callsigns
20
Country
US
Last broadcast
13d ago

Last known position

Most recent position reported by Mode-S A03331.

Country allocation

The ICAO 24-bit address A03331 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
UCA4858 CommutAir 10 2026-06-11
UCA4963 - 9 2026-06-28
UCA4319 - 9 2026-06-30
UCA4313 - 9 2026-06-28
UCA4834 - 8 2026-06-30
UCA4810 - 7 2026-06-25
UCA4332 CommutAir 7 2026-06-17
UCA4324 - 7 2026-06-19
UCA4242 - 7 2026-07-01
UCA4229 - 7 2026-06-28
UCA4954 CommutAir 6 2026-06-07
UCA4950 - 6 2026-06-30
UCA4945 CommutAir 6 2026-06-06
UCA4861 CommutAir 6 2026-06-20
UCA4372 CommutAir 6 2026-05-25
UCA4368 CommutAir 6 2026-06-17
UCA4328 - 6 2026-06-28
UCA4311 CommutAir 6 2026-06-25
UCA4308 - 6 2026-06-25
UCA4276 CommutAir 6 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-01 UCA4242 - Jul 1, 00:55 UTCJul 1, 02:15 UTC1h 20m
2026-06-30 UCA3266 IAH → BHM Jun 30, 23:06 UTCJun 30, 23:54 UTC48m
2026-06-30 UCA3266 - Jun 30, 22:35 UTCJun 30, 22:50 UTC15m
2026-06-30 UCA4905 - Jun 30, 20:00 UTCJun 30, 21:30 UTC1h 30m
2026-06-30 UCA4286 IAD → HSV Jun 30, 17:15 UTCJun 30, 18:40 UTC1h 25m
2026-06-30 UCA4834 - Jun 30, 15:00 UTCJun 30, 15:25 UTC25m
2026-06-30 UCA4319 - Jun 30, 13:00 UTCJun 30, 13:25 UTC25m
2026-06-30 UCA4319 IAD → SCE Jun 30, 13:01 UTCJun 30, 13:53 UTC52m
2026-06-30 UCA4939 - Jun 30, 10:10 UTCJun 30, 10:50 UTC40m
2026-06-30 UCA4950 - Jun 30, 02:40 UTCJun 30, 03:20 UTC40m
2026-06-30 UCA4882 - Jun 30, 00:00 UTCJun 30, 00:20 UTC20m
2026-06-29 UCA4250 - Jun 29, 22:00 UTCJun 29, 22:24 UTC25m
2026-06-29 UCA4250 IAD → MDT Jun 29, 21:58 UTCJun 29, 22:25 UTC27m
2026-06-29 UCA4834 - Jun 29, 16:10 UTCJun 29, 16:35 UTC25m
2026-06-29 UCA4319 IAD → SCE Jun 29, 14:41 UTCJun 29, 15:32 UTC51m
2026-06-29 UCA4319 - Jun 29, 15:00 UTCJun 29, 15:19 UTC20m
2026-06-29 UCA4342 - Jun 29, 10:40 UTCJun 29, 10:55 UTC15m
2026-06-29 UCA4265 - Jun 29, 03:05 UTCJun 29, 03:20 UTC15m
2026-06-28 UCA4313 - Jun 28, 23:54 UTCJun 29, 01:10 UTC1h 15m
2026-06-28 UCA4313 GSP → IAD Jun 28, 23:53 UTCJun 29, 01:09 UTC1h 16m
2026-06-28 UCA4963 - Jun 28, 21:45 UTCJun 28, 22:39 UTC55m
2026-06-28 UCA4963 IAD → GSP Jun 28, 21:43 UTCJun 28, 23:00 UTC1h 17m
2026-06-28 UCA4328 - Jun 28, 19:04 UTCJun 28, 19:25 UTC20m
2026-06-28 UCA4815 - Jun 28, 17:19 UTCJun 28, 17:30 UTC10m
2026-06-28 UCA4367 - Jun 28, 14:34 UTCJun 28, 15:44 UTC1h 10m
2026-06-28 UCA4229 - Jun 28, 12:39 UTCJun 28, 13:34 UTC55m
2026-06-28 UCA4229 IAD → PVD Jun 28, 12:36 UTCJun 28, 13:35 UTC59m
2026-06-28 UCA4922 ROA → IAD Jun 28, 10:19 UTCJun 28, 11:00 UTC40m
2026-06-28 UCA4897 IAD → ROA Jun 28, 02:48 UTCJun 28, 03:15 UTC27m
2026-06-28 UCA4897 IAD → ROA Jun 28, 02:44 UTCJun 28, 03:19 UTC35m
2026-06-27 UCA4313 - Jun 27, 23:45 UTCJun 28, 00:59 UTC1h 15m
2026-06-27 UCA4963 - Jun 27, 21:50 UTCJun 27, 22:45 UTC55m
2026-06-27 UCA4328 - Jun 27, 19:05 UTCJun 27, 19:24 UTC20m
2026-06-27 UCA4328 CHO → IAD Jun 27, 19:07 UTCJun 27, 19:26 UTC19m
2026-06-27 UCA4815 - Jun 27, 17:14 UTCJun 27, 17:29 UTC15m
2026-06-27 UCA4227 - Jun 27, 14:45 UTCJun 27, 15:24 UTC40m
2026-06-27 UCA4965 - Jun 27, 12:55 UTCJun 27, 13:24 UTC30m
2026-06-27 UCA4965 IAD → AVP Jun 27, 12:51 UTCJun 27, 13:27 UTC36m
2026-06-27 UCA4922 ROA → IAD Jun 27, 10:25 UTCJun 27, 11:09 UTC45m
2026-06-27 UCA4897 IAD → ROA Jun 27, 03:20 UTCJun 27, 04:05 UTC45m
2026-06-26 UCA4238 - Jun 26, 23:44 UTCJun 27, 01:00 UTC1h 15m
2026-06-26 UCA4302 IAD → BTV Jun 26, 21:42 UTCJun 26, 22:41 UTC59m
2026-06-26 UCA4302 - Jun 26, 21:30 UTCJun 26, 22:40 UTC1h 10m
2026-06-26 UCA4925 - Jun 26, 19:04 UTCJun 26, 20:24 UTC1h 20m
2026-06-26 UCA4925 MHT → IAD Jun 26, 18:53 UTCJun 26, 20:24 UTC1h 31m
2026-06-26 UCA4930 - Jun 26, 16:35 UTCJun 26, 17:40 UTC1h 5m
2026-06-26 UCA4974 - Jun 26, 14:44 UTCJun 26, 15:10 UTC25m
2026-06-26 UCA4986 - Jun 26, 12:59 UTCJun 26, 13:24 UTC25m
2026-06-26 UCA4986 IAD → MDT Jun 26, 12:56 UTCJun 26, 13:22 UTC26m
2026-06-26 UCA4939 - Jun 26, 10:05 UTCJun 26, 10:55 UTC50m

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 N11164 page for operator, model, and routing details .

Mode-S A03331 frequently asked

What is Mode-S code A03331?
A03331 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N11164.
Where is Mode-S A03331 registered?
Mode-S code A03331 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 A03331 broadcasting right now?
No active broadcast right now. Last signal was 13d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A03331, octal 50031461, decimal 10,498,865.
What flights does A03331 operate?
Mode-S A03331 has broadcast 20 distinct callsigns, including UCA4858, UCA4963, UCA4319, UCA4313, UCA4834.