Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A8B75F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N66056 · BOEING 767-400 · operated by UNITED AIRLINES INC

Hex
A8B75F
Octal
52133537
Decimal
11,056,991
Country
US
Tail
N66056
Type
B764
Broadcasting now · callsign UAL170 · 23,000 ft
Flights observed
238
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A8B75F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A8B75F 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
UAL50 - 19 2026-07-12
UAL51 - 18 2026-07-09
UAL169 - 17 2026-07-13
UAL121 - 17 2026-06-21
UAL260 - 15 2026-07-11
UAL120 - 14 2026-06-20
UAL170 - 13 2026-07-13
UAL261 - 12 2026-07-09
UAL2143 - 10 2026-06-14
UAL53 United Airlines 8 2026-04-29
UAL861 - 7 2026-07-10
UAL385 - 7 2026-07-05
UAL1173 United Airlines 7 2026-06-14
UAL509 United Airlines 6 2026-06-15
UAL52 United Airlines 5 2026-04-28
UAL386 - 5 2026-07-05
UAL331 United Airlines 5 2026-06-07
UAL330 United Airlines 5 2026-06-06
UAL30 United Airlines 5 2026-05-15
UAL860 - 4 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 UAL170 - Jul 13, 23:35 UTCJul 14, 05:45 UTC6h 10m
2026-07-13 UAL169 - Jul 13, 09:25 UTCJul 13, 09:45 UTC20m
2026-07-13 UAL169 VCE → EWR Jul 13, 09:29 UTCJul 13, 18:01 UTC8h 32m
2026-07-13 UAL169 VCE → EWR Jul 13, 09:29 UTCJul 13, 17:57 UTC8h 28m
2026-07-12 UAL170 EWR → VCE Jul 12, 22:55 UTCJul 13, 06:25 UTC7h 30m
2026-07-12 UAL50 - Jul 12, 09:20 UTCJul 12, 16:45 UTC7h 25m
2026-07-11 UAL260 IAD → MAD Jul 11, 22:36 UTCJul 12, 05:47 UTC7h 11m
2026-07-11 UAL260 IAD → MAD Jul 11, 22:40 UTCJul 12, 05:45 UTC7h 5m
2026-07-11 UAL860 - Jul 11, 00:45 UTCJul 11, 10:10 UTC9h 25m
2026-07-10 UAL861 - Jul 10, 03:40 UTCJul 10, 12:55 UTC9h 15m
2026-07-09 UAL261 MAD → IAD Jul 9, 09:43 UTCJul 9, 17:47 UTC8h 4m
2026-07-09 UAL51 EWR → MAD Jul 9, 00:15 UTCJul 9, 06:55 UTC6h 40m
2026-07-09 UAL51 - Jul 9, 00:05 UTCJul 9, 07:00 UTC6h 55m
2026-07-08 UAL963 - Jul 8, 11:45 UTCJul 8, 19:55 UTC8h 10m
2026-07-08 UAL963 BER → EWR Jul 8, 11:51 UTCJul 8, 19:53 UTC8h 2m
2026-07-08 UAL962 EWR → BER Jul 8, 02:33 UTCJul 8, 09:46 UTC7h 13m
2026-07-08 UAL962 EWR → BER Jul 8, 02:20 UTCJul 8, 03:45 UTC1h 25m
2026-07-07 UAL50 MAD → EWR Jul 7, 09:25 UTCJul 7, 16:50 UTC7h 25m
2026-07-06 UAL51 EWR → MAD Jul 6, 23:50 UTCJul 7, 06:43 UTC6h 53m
2026-07-06 UAL51 - Jul 6, 23:50 UTCJul 7, 01:30 UTC1h 40m
2026-07-06 UAL50 MAD → EWR Jul 6, 09:15 UTCJul 6, 16:55 UTC7h 40m
2026-07-06 UAL51 - Jul 6, 00:00 UTCJul 6, 06:40 UTC6h 40m
2026-07-05 UAL386 DBV → EWR Jul 5, 11:22 UTCJul 5, 20:36 UTC9h 14m
2026-07-05 UAL386 - Jul 5, 11:10 UTCJul 5, 11:45 UTC35m
2026-07-05 UAL385 - Jul 5, 01:25 UTCJul 5, 01:45 UTC20m
2026-07-04 UAL385 EWR → DBV Jul 4, 23:45 UTCJul 5, 09:11 UTC9h 26m
2026-07-03 UAL15 - Jul 3, 14:45 UTCJul 3, 22:20 UTC7h 35m
2026-07-03 UAL904 EWR → LHR Jul 3, 02:10 UTCJul 3, 09:00 UTC6h 50m
2026-07-02 UAL169 - Jul 2, 09:30 UTCJul 2, 12:10 UTC2h 40m
2026-07-02 UAL169 VCE → EWR Jul 2, 09:29 UTCJul 2, 18:39 UTC9h 10m
2026-07-02 UAL169 VCE → EWR Jul 2, 09:29 UTCJul 2, 18:33 UTC9h 4m
2026-07-01 UAL170 - Jul 1, 23:05 UTCJul 2, 06:45 UTC7h 40m
2026-07-01 UAL169 VCE → EWR Jul 1, 11:25 UTCJul 1, 20:05 UTC8h 40m
2026-07-01 UAL170 EWR → VCE Jul 1, 01:05 UTCJul 1, 08:40 UTC7h 35m
2026-06-30 UAL169 - Jun 30, 10:15 UTCJun 30, 11:45 UTC1h 30m
2026-06-30 UAL169 VCE → EWR Jun 30, 09:59 UTCJun 30, 19:05 UTC9h 6m
2026-06-29 UAL170 - Jun 29, 22:49 UTCJun 30, 06:15 UTC7h 26m
2026-06-29 UAL736 - Jun 29, 07:50 UTCJun 29, 17:19 UTC9h 30m
2026-06-28 UAL735 - Jun 28, 20:50 UTCJun 29, 04:39 UTC7h 50m
2026-06-28 UAL237 - Jun 28, 08:34 UTCJun 28, 17:00 UTC8h 25m
2026-06-27 UAL236 EWR → PMI Jun 27, 20:38 UTCJun 28, 03:58 UTC7h 20m
2026-06-27 UAL236 - Jun 27, 20:39 UTCJun 27, 21:44 UTC1h 5m
2026-06-27 UAL50 MAD → EWR Jun 27, 09:15 UTCJun 27, 17:14 UTC8h 0m
2026-06-26 UAL260 ABQ → SFO Jun 26, 22:34 UTCJun 27, 05:25 UTC6h 50m
2026-06-26 UAL860 GRU → IAD Jun 26, 02:09 UTCJun 26, 11:14 UTC9h 5m
2026-06-25 UAL861 BOS → GIG Jun 25, 03:44 UTCJun 25, 12:10 UTC8h 25m
2026-06-25 UAL861 BOS → GIG Jun 25, 03:04 UTCJun 25, 03:40 UTC35m
2026-06-23 UAL261 MAD → IAD Jun 23, 09:45 UTCJun 23, 17:54 UTC8h 10m
2026-06-23 UAL51 - Jun 23, 00:50 UTCJun 23, 07:19 UTC6h 30m
2026-06-21 UAL121 BCN → EWR Jun 21, 10:34 UTCJun 21, 19:05 UTC8h 30m

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 N66056 page for operator, model, and routing details .

Mode-S A8B75F frequently asked

What is Mode-S code A8B75F?
A8B75F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N66056.
Where is Mode-S A8B75F registered?
Mode-S code A8B75F 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 A8B75F broadcasting right now?
Yes. Mode-S A8B75F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8B75F, octal 52133537, decimal 11,056,991.
What flights does A8B75F operate?
Mode-S A8B75F has broadcast 20 distinct callsigns, including UAL50, UAL51, UAL169, UAL121, UAL260.