Apparatus

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sensors Mode-S transponder

A12030

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17169 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A12030
Octal
50220060
Decimal
10,559,536
Country
US
Tail
N17169
Type
E45X
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
588
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S A12030.

Country allocation

The ICAO 24-bit address A12030 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
UCA4286 - 11 2026-06-12
UCA4965 CommutAir 9 2026-06-12
UCA4340 - 8 2026-06-25
UCA4241 CommutAir 8 2026-06-27
UCA4905 CommutAir 7 2026-06-12
UCA4824 - 7 2026-06-27
UCA4329 CommutAir 7 2026-07-24
UCA4859 - 6 2026-07-06
UCA4813 CommutAir 6 2026-07-24
UCA4369 - 6 2026-06-16
UCA4333 - 6 2026-06-29
UCA4315 - 6 2026-06-25
UCA4299 CommutAir 6 2026-07-20
UCA4281 - 6 2026-06-29
UCA4227 CommutAir 6 2026-06-12
UCA4939 - 5 2026-07-12
UCA4938 - 5 2026-06-29
UCA4816 - 5 2026-07-01
UCA4354 - 5 2026-07-06
UCA4351 - 5 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4274 IAD → PVD Jul 26, 21:20 UTCJul 26, 22:00 UTC40m
2026-07-26 UCA4848 TYS → IAD Jul 26, 17:50 UTCJul 26, 19:00 UTC1h 10m
2026-07-26 UCA4833 STL → IAD Jul 26, 13:20 UTCJul 26, 15:15 UTC1h 55m
2026-07-26 UCA4833 STL → IAD Jul 26, 13:16 UTCJul 26, 15:13 UTC1h 57m
2026-07-25 UCA4923 MOB → IAH Jul 25, 22:20 UTCJul 25, 23:25 UTC1h 5m
2026-07-25 UCA4307 BTV → IAD Jul 25, 20:05 UTCJul 25, 21:00 UTC55m
2026-07-25 UCA4258 CVG → IAD Jul 25, 16:40 UTCJul 25, 17:55 UTC1h 15m
2026-07-25 UCA4258 CVG → IAD Jul 25, 16:48 UTCJul 25, 17:54 UTC1h 6m
2026-07-25 UCA4293 IAH → PNS Jul 25, 13:10 UTCJul 25, 14:20 UTC1h 10m
2026-07-25 UCA4248 BHM → IAH Jul 25, 10:35 UTCJul 25, 11:30 UTC55m
2026-07-25 UCA4919 IAH → TUL Jul 25, 01:55 UTCJul 25, 02:35 UTC40m
2026-07-24 UCA4978 LBB → IAH Jul 24, 22:00 UTCJul 24, 23:15 UTC1h 15m
2026-07-24 UCA4978 LBB → IAH Jul 24, 22:04 UTCJul 24, 23:11 UTC1h 7m
2026-07-24 UCA4280 CMH → IAD Jul 24, 19:40 UTCJul 24, 20:45 UTC1h 5m
2026-07-24 UCA4280 CMH → IAD Jul 24, 19:41 UTCJul 24, 20:43 UTC1h 2m
2026-07-24 UCA4329 BRO → IAH Jul 24, 17:20 UTCJul 24, 18:00 UTC40m
2026-07-24 UCA4329 BRO → IAH Jul 24, 17:28 UTCJul 24, 18:18 UTC50m
2026-07-24 UCA4813 IAH → BRO Jul 24, 15:20 UTCJul 24, 16:05 UTC45m
2026-07-24 UCA4226 LRD → IAH Jul 24, 12:25 UTCJul 24, 13:25 UTC1h 0m
2026-07-24 UCA4285 IAH → MFE Jul 24, 00:25 UTCJul 24, 01:20 UTC55m
2026-07-23 UCA4365 IAD → BDL Jul 23, 21:50 UTCJul 23, 22:45 UTC55m
2026-07-23 UCA4929 LBB → IAH Jul 23, 19:45 UTCJul 23, 20:50 UTC1h 5m
2026-07-23 UCA4361 PWM → IAD Jul 23, 17:15 UTCJul 23, 18:20 UTC1h 5m
2026-07-23 UCA4344 IAH → HRL Jul 23, 14:55 UTCJul 23, 16:00 UTC1h 5m
2026-07-23 UCA4330 LCH → IAH Jul 23, 12:45 UTCJul 23, 13:00 UTC15m
2026-07-23 UCA4330 LCH → IAH Jul 23, 12:40 UTCJul 23, 13:03 UTC23m
2026-07-22 UCA4375 BTR → IAH Jul 22, 22:05 UTCJul 22, 22:25 UTC20m
2026-07-22 UCA4934 - Jul 22, 19:20 UTCJul 22, 19:40 UTC20m
2026-07-22 UCA4921 - Jul 22, 17:40 UTCJul 22, 17:55 UTC15m
2026-07-22 UCA4271 BRO → IAH Jul 22, 14:30 UTCJul 22, 15:30 UTC1h 0m
2026-07-21 UCA4832 OKC → IAH Jul 21, 22:25 UTCJul 21, 23:05 UTC40m
2026-07-21 UCA4243 - Jul 21, 19:25 UTCJul 21, 20:25 UTC1h 0m
2026-07-21 UCA4272 - Jul 21, 17:10 UTCJul 21, 18:05 UTC55m
2026-07-21 UCA4233 HSV → IAH Jul 21, 14:50 UTCJul 21, 16:05 UTC1h 15m
2026-07-21 UCA4279 - Jul 21, 01:05 UTCJul 21, 02:15 UTC1h 10m
2026-07-20 UCA4316 - Jul 20, 22:15 UTCJul 20, 23:35 UTC1h 20m
2026-07-20 UCA4316 ICT → IAH Jul 20, 22:16 UTCJul 20, 23:37 UTC1h 21m
2026-07-20 UCA4987 IAH → ICT Jul 20, 19:40 UTCJul 20, 21:00 UTC1h 20m
2026-07-20 UCA4987 IAH → ICT Jul 20, 19:39 UTCJul 20, 20:57 UTC1h 18m
2026-07-20 UCA4329 - Jul 20, 17:30 UTCJul 20, 18:25 UTC55m
2026-07-20 UCA4813 - Jul 20, 15:15 UTCJul 20, 15:55 UTC40m
2026-07-20 UCA4299 HSV → IAH Jul 20, 12:00 UTCJul 20, 13:30 UTC1h 30m
2026-07-20 UCA4299 HSV → IAH Jul 20, 12:01 UTCJul 20, 13:29 UTC1h 28m
2026-07-20 UCA4292 - Jul 20, 01:10 UTCJul 20, 02:35 UTC1h 25m
2026-07-19 UCA4263 IAH → MLM Jul 19, 22:15 UTCJul 19, 23:35 UTC1h 20m
2026-07-19 UCA4263 IAH → MLM Jul 19, 22:26 UTCJul 19, 23:36 UTC1h 10m
2026-07-19 UCA4872 BRO → IAH Jul 19, 19:55 UTCJul 19, 21:15 UTC1h 20m
2026-07-19 UCA4872 BRO → IAH Jul 19, 19:44 UTCJul 19, 21:16 UTC1h 32m
2026-07-19 UCA4851 - Jul 19, 17:25 UTCJul 19, 18:45 UTC1h 20m
2026-07-19 UCA4225 - Jul 19, 14:20 UTCJul 19, 15:45 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 N17169 page for operator, model, and routing details .

Mode-S A12030 frequently asked

What is Mode-S code A12030?
A12030 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17169.
Where is Mode-S A12030 registered?
Mode-S code A12030 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 A12030 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A12030, octal 50220060, decimal 10,559,536.
What flights does A12030 operate?
Mode-S A12030 has broadcast 20 distinct callsigns, including UCA4286, UCA4965, UCA4340, UCA4241, UCA4905.