Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A11FC6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17138 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A11FC6
Octal
50217706
Decimal
10,559,430
Country
US
Tail
N17138
Type
E45X
Broadcasting now · callsign UCA4330 · 6,050 ft
Flights observed
461
Distinct callsigns
20
Country
US
Last broadcast
9h ago

Current position

A11FC6 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A11FC6 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
UCA4905 - 7 2026-06-23
UCA4822 - 6 2026-06-24
UCA4818 - 6 2026-07-04
UCA4816 - 6 2026-06-27
UCA4854 CommutAir 5 2026-05-29
UCA4831 CommutAir 5 2026-06-06
UCA4350 - 5 2026-06-28
UCA4300 - 5 2026-07-09
UCA4283 - 5 2026-07-04
UCA4266 CommutAir 5 2026-06-10
UCA4980 CommutAir 4 2026-05-15
UCA4953 CommutAir 4 2026-05-18
UCA4919 - 4 2026-06-25
UCA4909 - 4 2026-07-05
UCA4856 CommutAir 4 2026-06-01
UCA4837 - 4 2026-07-13
UCA4821 - 4 2026-06-25
UCA4817 CommutAir 4 2026-06-27
UCA4374 - 4 2026-06-26
UCA4372 CommutAir 4 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UCA4985 - Jul 14, 04:55 UTCJul 14, 05:10 UTC15m
2026-07-14 UCA4978 - Jul 14, 02:10 UTCJul 14, 03:20 UTC1h 10m
2026-07-14 UCA4280 - Jul 14, 00:20 UTCJul 14, 01:25 UTC1h 5m
2026-07-13 UCA4245 - Jul 13, 21:50 UTCJul 13, 22:50 UTC1h 0m
2026-07-13 UCA4245 JAN → IAH Jul 13, 21:45 UTCJul 13, 22:47 UTC1h 2m
2026-07-13 UCA4347 - Jul 13, 15:15 UTCJul 13, 16:00 UTC45m
2026-07-13 UCA4837 - Jul 13, 12:20 UTCJul 13, 13:25 UTC1h 5m
2026-07-13 UCA4337 - Jul 13, 02:10 UTCJul 13, 03:05 UTC55m
2026-07-12 UCA4893 - Jul 12, 22:20 UTCJul 12, 23:55 UTC1h 35m
2026-07-12 UCA4893 HSV → IAH Jul 12, 22:07 UTCJul 12, 23:52 UTC1h 45m
2026-07-12 UCA4879 - Jul 12, 19:15 UTCJul 12, 20:45 UTC1h 30m
2026-07-11 UCA4233 - Jul 11, 14:35 UTCJul 11, 16:00 UTC1h 25m
2026-07-11 UCA4233 HOB → IAH Jul 11, 14:38 UTCJul 11, 16:02 UTC1h 24m
2026-07-11 UCA4279 - Jul 11, 02:25 UTCJul 11, 03:35 UTC1h 10m
2026-07-11 UCA4339 - Jul 11, 00:05 UTCJul 11, 01:25 UTC1h 20m
2026-07-10 UCA4275 - Jul 10, 21:25 UTCJul 10, 22:40 UTC1h 15m
2026-07-10 UCA4275 IAH → ELP Jul 10, 21:29 UTCJul 10, 22:55 UTC1h 26m
2026-07-10 UCA4928 - Jul 10, 17:10 UTCJul 10, 17:55 UTC45m
2026-07-10 UCA4894 - Jul 10, 15:10 UTCJul 10, 15:45 UTC35m
2026-07-10 UCA4264 - Jul 10, 12:50 UTCJul 10, 13:35 UTC45m
2026-07-10 UCA4254 - Jul 10, 02:25 UTCJul 10, 03:15 UTC50m
2026-07-09 UCA4978 - Jul 9, 23:25 UTCJul 10, 00:35 UTC1h 10m
2026-07-09 UCA4280 - Jul 9, 21:30 UTCJul 9, 22:35 UTC1h 5m
2026-07-09 UCA4300 - Jul 9, 19:00 UTCJul 9, 20:15 UTC1h 15m
2026-07-09 UCA4261 - Jul 9, 14:50 UTCJul 9, 16:00 UTC1h 10m
2026-07-07 UCA4245 - Jul 7, 17:20 UTCJul 7, 18:10 UTC50m
2026-07-07 UCA4245 JAN → IAH Jul 7, 17:20 UTCJul 7, 18:06 UTC46m
2026-07-07 UCA4347 - Jul 7, 15:10 UTCJul 7, 15:55 UTC45m
2026-07-07 UCA4264 - Jul 7, 12:45 UTCJul 7, 13:35 UTC50m
2026-07-07 UCA4254 - Jul 7, 01:35 UTCJul 7, 02:20 UTC45m
2026-07-06 UCA4996 - Jul 6, 22:25 UTCJul 6, 23:50 UTC1h 25m
2026-07-06 UCA4996 SGF → IAH Jul 6, 22:23 UTCJul 6, 23:46 UTC1h 23m
2026-07-06 UCA4911 - Jul 6, 19:45 UTCJul 6, 20:55 UTC1h 10m
2026-07-06 UCA4282 - Jul 6, 14:30 UTCJul 6, 15:20 UTC50m
2026-07-06 UCA4282 JAN → IAH Jul 6, 14:36 UTCJul 6, 15:17 UTC41m
2026-07-06 UCA4334 - Jul 6, 01:10 UTCJul 6, 02:05 UTC55m
2026-07-05 UCA4379 - Jul 5, 21:55 UTCJul 5, 22:45 UTC50m
2026-07-05 UCA4366 - Jul 5, 19:50 UTCJul 5, 20:35 UTC45m
2026-07-05 UCA4909 - Jul 5, 16:30 UTCJul 5, 18:10 UTC1h 40m
2026-07-05 UCA4909 HSV → IAH Jul 5, 16:31 UTCJul 5, 17:56 UTC1h 25m
2026-07-05 UCA4262 IAD → HSV Jul 5, 13:17 UTCJul 5, 14:53 UTC1h 36m
2026-07-05 UCA4262 IAD → HSV Jul 5, 13:20 UTCJul 5, 14:50 UTC1h 30m
2026-07-05 UCA4313 - Jul 5, 00:10 UTCJul 5, 01:30 UTC1h 20m
2026-07-04 UCA4313 GSP → IAD Jul 4, 23:56 UTCJul 5, 01:27 UTC1h 31m
2026-07-04 UCA4963 - Jul 4, 22:00 UTCJul 4, 23:10 UTC1h 10m
2026-07-04 UCA4328 - Jul 4, 19:30 UTCJul 4, 19:55 UTC25m
2026-07-04 UCA4815 - Jul 4, 17:25 UTCJul 4, 17:50 UTC25m
2026-07-04 UCA4283 - Jul 4, 14:50 UTCJul 4, 15:45 UTC55m
2026-07-04 UCA4818 IAD → CAE Jul 4, 13:06 UTCJul 4, 13:56 UTC50m
2026-07-04 UCA4818 - Jul 4, 12:50 UTCJul 4, 13:30 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 N17138 page for operator, model, and routing details .

Mode-S A11FC6 frequently asked

What is Mode-S code A11FC6?
A11FC6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17138.
Where is Mode-S A11FC6 registered?
Mode-S code A11FC6 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 A11FC6 broadcasting right now?
Yes. Mode-S A11FC6 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A11FC6, octal 50217706, decimal 10,559,430.
What flights does A11FC6 operate?
Mode-S A11FC6 has broadcast 20 distinct callsigns, including UCA4905, UCA4822, UCA4818, UCA4816, UCA4854.