Apparatus

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sensors Mode-S transponder

A11BC6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17015 · BOEING 787-10 Dreamliner · operated by UNITED AIRLINES INC

Hex
A11BC6
Octal
50215706
Decimal
10,558,406
Country
US
Tail
N17015
Type
B78X
Broadcasting now · callsign UAL2397 · 34,975 ft
Flights observed
194
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A11BC6 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A11BC6 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
UAL986 - 11 2026-07-06
UAL994 United Airlines 9 2026-06-13
UAL992 United Airlines 9 2026-07-03
UAL987 - 9 2026-07-06
UAL973 United Airlines 9 2026-06-14
UAL971 - 9 2026-06-23
UAL945 - 9 2026-06-16
UAL991 - 8 2026-07-04
UAL944 - 7 2026-06-15
UAL423 - 6 2026-07-07
UAL415 - 6 2026-06-21
UAL3876 United Airlines 6 2026-04-18
UAL125 United Airlines 6 2026-06-13
UAL124 - 6 2026-06-12
UAL39 - 5 2026-07-12
UAL1855 - 5 2026-06-12
UAL995 United Airlines 4 2026-06-06
UAL972 United Airlines 4 2026-06-05
UAL970 - 4 2026-06-22
UAL906 - 4 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL2397 - Jul 14, 04:35 UTCJul 14, 05:30 UTC55m
2026-07-13 UAL38 - Jul 13, 09:50 UTCJul 13, 19:45 UTC9h 55m
2026-07-12 UAL39 LAX → HND Jul 12, 19:02 UTCJul 13, 06:01 UTC10h 59m
2026-07-12 UAL39 - Jul 12, 19:10 UTCJul 13, 06:01 UTC10h 50m
2026-07-11 UAL38 - Jul 11, 09:40 UTCJul 11, 19:50 UTC10h 10m
2026-07-10 UAL881 - Jul 10, 17:40 UTCJul 11, 05:45 UTC12h 5m
2026-07-10 UAL218 - Jul 10, 02:15 UTCJul 10, 09:45 UTC7h 30m
2026-07-09 UAL219 ORD → HNL Jul 9, 15:09 UTCJul 9, 23:15 UTC8h 6m
2026-07-09 UAL219 - Jul 9, 15:10 UTCJul 9, 23:15 UTC8h 5m
2026-07-09 UAL844 - Jul 9, 01:35 UTCJul 9, 11:10 UTC9h 35m
2026-07-08 UAL845 ORD → GRU Jul 8, 03:05 UTCJul 8, 12:30 UTC9h 25m
2026-07-07 UAL423 - Jul 7, 10:10 UTCJul 7, 11:30 UTC1h 20m
2026-07-07 UAL423 ATH → ORD Jul 7, 09:55 UTCJul 7, 20:34 UTC10h 39m
2026-07-06 UAL422 - Jul 6, 21:50 UTCJul 7, 07:15 UTC9h 25m
2026-07-06 UAL986 - Jul 6, 09:55 UTCJul 6, 18:00 UTC8h 5m
2026-07-06 UAL987 ORD → CDG Jul 6, 00:05 UTCJul 6, 07:25 UTC7h 20m
2026-07-05 UAL3920 IAD → ORD Jul 5, 18:47 UTCJul 5, 20:17 UTC1h 30m
2026-07-05 UAL3920 IAD → ORD Jul 5, 18:55 UTCJul 5, 20:30 UTC1h 35m
2026-07-04 UAL991 BCN → IAD Jul 4, 09:50 UTCJul 4, 17:45 UTC7h 55m
2026-07-03 UAL992 IAD → BCN Jul 3, 22:56 UTCJul 4, 06:12 UTC7h 16m
2026-07-03 UAL992 IAD → BCN Jul 3, 22:45 UTCJul 4, 00:00 UTC1h 15m
2026-07-03 UAL991 BCN → IAD Jul 3, 09:50 UTCJul 3, 17:55 UTC8h 5m
2026-07-02 UAL992 IAD → BCN Jul 2, 23:15 UTCJul 3, 06:45 UTC7h 30m
2026-07-02 UAL991 BCN → IAD Jul 2, 09:25 UTCJul 2, 17:35 UTC8h 10m
2026-07-01 UAL992 IAD → BCN Jul 1, 23:00 UTCJul 2, 06:35 UTC7h 35m
2026-07-01 UAL991 - Jul 1, 09:55 UTCJul 1, 11:35 UTC1h 40m
2026-07-01 UAL991 BCN → IAD Jul 1, 09:37 UTCJul 1, 17:49 UTC8h 12m
2026-06-30 UAL992 IAD → BCN Jun 30, 22:50 UTCJul 1, 06:15 UTC7h 25m
2026-06-30 UAL991 BCN → IAD Jun 30, 09:30 UTCJun 30, 17:25 UTC7h 55m
2026-06-29 UAL992 IAD → BCN Jun 29, 22:56 UTCJun 30, 06:01 UTC7h 5m
2026-06-29 UAL992 IAD → BCN Jun 29, 22:44 UTCJun 30, 05:55 UTC7h 10m
2026-06-29 UAL991 BCN → IAD Jun 29, 09:34 UTCJun 29, 17:59 UTC8h 25m
2026-06-29 UAL991 BCN → IAD Jun 29, 09:37 UTCJun 29, 17:57 UTC8h 20m
2026-06-28 UAL992 IAD → BCN Jun 28, 23:06 UTCJun 29, 06:01 UTC6h 55m
2026-06-28 UAL992 IAD → BCN Jun 28, 23:04 UTCJun 29, 00:10 UTC1h 5m
2026-06-28 UAL3908 - Jun 28, 17:50 UTCJun 28, 19:04 UTC1h 15m
2026-06-27 UAL986 - Jun 27, 11:30 UTCJun 27, 19:39 UTC8h 10m
2026-06-27 UAL987 - Jun 27, 00:20 UTCJun 27, 02:29 UTC2h 10m
2026-06-26 UAL987 ORD → CDG Jun 26, 23:52 UTCJun 27, 07:30 UTC7h 38m
2026-06-26 UAL986 - Jun 26, 11:00 UTCJun 26, 19:14 UTC8h 15m
2026-06-26 UAL986 CDG → ORD Jun 26, 11:04 UTCJun 26, 18:56 UTC7h 52m
2026-06-26 UAL987 - Jun 26, 00:24 UTCJun 26, 07:39 UTC7h 15m
2026-06-25 UAL906 FRA → ORD Jun 25, 11:15 UTCJun 25, 19:29 UTC8h 15m
2026-06-25 UAL907 ORD → FRA Jun 25, 01:30 UTCJun 25, 08:55 UTC7h 25m
2026-06-25 UAL907 ORD → FRA Jun 25, 00:22 UTCJun 25, 08:45 UTC8h 23m
2026-06-24 UAL423 ATH → ORD Jun 24, 10:14 UTCJun 24, 20:35 UTC10h 20m
2026-06-24 UAL423 ATH → ORD Jun 24, 09:55 UTCJun 24, 20:26 UTC10h 31m
2026-06-23 UAL422 ORD → ATH Jun 23, 21:54 UTCJun 24, 07:24 UTC9h 30m
2026-06-23 UAL971 - Jun 23, 08:25 UTCJun 23, 18:04 UTC9h 40m
2026-06-22 UAL970 - Jun 22, 21:10 UTCJun 23, 05:34 UTC8h 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 N17015 page for operator, model, and routing details .

Mode-S A11BC6 frequently asked

What is Mode-S code A11BC6?
A11BC6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17015.
Where is Mode-S A11BC6 registered?
Mode-S code A11BC6 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 A11BC6 broadcasting right now?
Yes. Mode-S A11BC6 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A11BC6, octal 50215706, decimal 10,558,406.
What flights does A11BC6 operate?
Mode-S A11BC6 has broadcast 20 distinct callsigns, including UAL986, UAL994, UAL992, UAL987, UAL973.