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sensors Mode-S transponder

A11FE7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17146 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A11FE7
Octal
50217747
Decimal
10,559,463
Country
US
Tail
N17146
Type
E45X
No current signal · last broadcast Jul 26, 20:10 UTC
Flights observed
584
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:10 UTC

Last known position

Most recent position reported by Mode-S A11FE7.

Country allocation

The ICAO 24-bit address A11FE7 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
UCA4845 CommutAir 10 2026-06-14
UCA4835 CommutAir 8 2026-07-23
UCA4980 CommutAir 7 2026-07-26
UCA4947 CommutAir 7 2026-07-25
UCA4977 - 6 2026-06-24
UCA4950 - 6 2026-07-01
UCA4939 - 6 2026-07-01
UCA4917 - 6 2026-07-08
UCA4855 - 6 2026-07-07
UCA4851 - 6 2026-07-18
UCA4368 CommutAir 6 2026-07-05
UCA4285 - 6 2026-07-10
UCA4271 - 6 2026-07-14
UCA4270 - 6 2026-07-03
UCA4253 - 6 2026-07-02
UCA4242 - 6 2026-07-17
UCA4234 - 6 2026-07-11
UCA5004 CommutAir 5 2026-05-30
UCA4946 - 5 2026-07-10
UCA4942 CommutAir 5 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4980 BTR → IAH Jul 26, 19:20 UTCJul 26, 20:10 UTC50m
2026-07-26 UCA4287 IAH → HRL Jul 26, 17:20 UTCJul 26, 18:00 UTC40m
2026-07-26 UCA4376 IAD → BTV Jul 26, 14:45 UTCJul 26, 15:40 UTC55m
2026-07-26 UCA4355 IAD → PVD Jul 26, 12:45 UTCJul 26, 13:30 UTC45m
2026-07-25 UCA4243 ORF → IAD Jul 25, 19:05 UTCJul 25, 20:00 UTC55m
2026-07-25 UCA4272 IAH → GPT Jul 25, 17:05 UTCJul 25, 18:00 UTC55m
2026-07-25 UCA4947 BTR → IAH Jul 25, 14:40 UTCJul 25, 15:25 UTC45m
2026-07-25 UCA4828 LIT → IAH Jul 25, 03:25 UTCJul 25, 04:10 UTC45m
2026-07-24 UCA4852 SGF → IAH Jul 24, 11:20 UTCJul 24, 12:55 UTC1h 35m
2026-07-24 UCA4852 SGF → IAH Jul 24, 11:35 UTCJul 24, 12:51 UTC1h 16m
2026-07-23 UCA4867 TUL → IAH Jul 23, 22:30 UTCJul 23, 23:45 UTC1h 15m
2026-07-23 UCA4835 MFE → IAH Jul 23, 19:30 UTCJul 23, 20:30 UTC1h 0m
2026-07-23 UCA4298 PVD → IAD Jul 23, 17:25 UTCJul 23, 17:45 UTC20m
2026-07-23 UCA4298 PVD → IAD Jul 23, 17:32 UTCJul 23, 18:13 UTC41m
2026-07-23 UCA4282 IAD → TYS Jul 23, 14:45 UTCJul 23, 15:45 UTC1h 0m
2026-07-23 UCA4282 IAD → TYS Jul 23, 14:36 UTCJul 23, 15:34 UTC58m
2026-07-23 UCA4320 IAH → JAN Jul 23, 01:50 UTCJul 23, 02:35 UTC45m
2026-07-22 UCA4303 PNS → IAH Jul 22, 21:55 UTCJul 22, 23:15 UTC1h 20m
2026-07-22 UCA4869 IAD → BTV Jul 22, 19:35 UTCJul 22, 21:00 UTC1h 25m
2026-07-22 UCA4996 SGF → IAH Jul 22, 00:00 UTCJul 22, 01:16 UTC1h 16m
2026-07-21 UCA4996 SGF → IAH Jul 21, 23:55 UTCJul 22, 01:20 UTC1h 25m
2026-07-21 UCA4911 - Jul 21, 21:40 UTCJul 21, 22:55 UTC1h 15m
2026-07-21 UCA4326 IAD → YUL Jul 21, 19:25 UTCJul 21, 20:10 UTC45m
2026-07-21 UCA4336 IAD → PVD Jul 21, 17:30 UTCJul 21, 18:30 UTC1h 0m
2026-07-21 UCA4336 IAD → PVD Jul 21, 17:32 UTCJul 21, 18:26 UTC54m
2026-07-21 UCA4947 - Jul 21, 14:45 UTCJul 21, 15:35 UTC50m
2026-07-21 UCA4947 BTR → IAH Jul 21, 14:47 UTCJul 21, 15:29 UTC42m
2026-07-21 UCA4828 LIT → IAH Jul 21, 03:00 UTCJul 21, 03:50 UTC50m
2026-07-21 UCA4247 PVD → IAD Jul 21, 00:05 UTCJul 21, 00:45 UTC40m
2026-07-21 UCA4247 PVD → IAD Jul 21, 00:00 UTCJul 21, 00:42 UTC42m
2026-07-20 UCA4341 PWM → IAD Jul 20, 22:40 UTCJul 20, 23:15 UTC35m
2026-07-20 UCA4243 - Jul 20, 19:10 UTCJul 20, 20:10 UTC1h 0m
2026-07-20 UCA4272 - Jul 20, 17:05 UTCJul 20, 18:00 UTC55m
2026-07-20 UCA4233 - Jul 20, 14:25 UTCJul 20, 15:45 UTC1h 20m
2026-07-20 UCA4279 - Jul 20, 00:55 UTCJul 20, 02:10 UTC1h 15m
2026-07-20 UCA4279 IAH → HOB Jul 20, 01:08 UTCJul 20, 02:09 UTC1h 1m
2026-07-19 UCA4978 LBB → IAH Jul 19, 22:00 UTCJul 19, 23:15 UTC1h 15m
2026-07-19 UCA4280 CMH → IAD Jul 19, 19:35 UTCJul 19, 20:45 UTC1h 10m
2026-07-19 UCA4258 - Jul 19, 16:45 UTCJul 19, 18:00 UTC1h 15m
2026-07-19 UCA4293 - Jul 19, 13:05 UTCJul 19, 14:20 UTC1h 15m
2026-07-18 UCA4851 - Jul 18, 17:05 UTCJul 18, 18:30 UTC1h 25m
2026-07-18 UCA4225 - Jul 18, 14:30 UTCJul 18, 15:50 UTC1h 20m
2026-07-18 UCA4330 LCH → IAH Jul 18, 13:05 UTCJul 18, 13:35 UTC30m
2026-07-18 UCA4985 - Jul 18, 01:45 UTCJul 18, 02:00 UTC15m
2026-07-17 UCA4242 - Jul 17, 22:49 UTCJul 18, 00:04 UTC1h 15m
2026-07-17 UCA4242 BHM → IAH Jul 17, 23:01 UTCJul 18, 00:05 UTC1h 4m
2026-07-17 UCA4263 IAH → MLM Jul 17, 21:25 UTCJul 17, 21:50 UTC25m
2026-07-17 UCA4263 IAH → MLM Jul 17, 17:40 UTCJul 17, 19:35 UTC1h 55m
2026-07-17 UCA4233 - Jul 17, 14:44 UTCJul 17, 16:15 UTC1h 30m
2026-07-17 UCA4279 - Jul 17, 01:05 UTCJul 17, 02:20 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 N17146 page for operator, model, and routing details .

Mode-S A11FE7 frequently asked

What is Mode-S code A11FE7?
A11FE7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17146.
Where is Mode-S A11FE7 registered?
Mode-S code A11FE7 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 A11FE7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A11FE7, octal 50217747, decimal 10,559,463.
What flights does A11FE7 operate?
Mode-S A11FE7 has broadcast 20 distinct callsigns, including UCA4845, UCA4835, UCA4980, UCA4947, UCA4977.