Apparatus

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sensors Mode-S transponder

A7A08A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N59053 · BOEING 767-400 · operated by UNITED AIRLINES INC

Hex
A7A08A
Octal
51720212
Decimal
10,985,610
Country
US
Tail
N59053
Type
B764
No current signal · last broadcast Jul 26, 22:20 UTC
Flights observed
246
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:20 UTC

Last known position

Most recent position reported by Mode-S A7A08A.

Country allocation

The ICAO 24-bit address A7A08A 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
UAL170 United Airlines 19 2026-07-25
UAL169 United Airlines 19 2026-07-26
UAL50 United Airlines 15 2026-07-24
UAL121 - 13 2026-06-25
UAL510 - 12 2026-07-15
UAL509 - 12 2026-07-15
UAL386 - 11 2026-07-14
UAL385 - 11 2026-07-13
UAL261 - 10 2026-07-16
UAL2143 - 10 2026-06-22
UAL1173 United Airlines 10 2026-06-22
UAL860 - 9 2026-07-21
UAL51 United Airlines 9 2026-07-23
UAL120 - 9 2026-06-24
UAL260 - 8 2026-07-10
UAL127 - 8 2026-07-18
UAL330 United Airlines 7 2026-06-12
UAL861 - 6 2026-07-20
UAL735 United Airlines 6 2026-07-26
UAL736 United Airlines 5 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL735 IAD → EWR Jul 26, 20:45 UTCJul 26, 22:20 UTC1h 35m
2026-07-26 UAL169 VCE → EWR Jul 26, 09:30 UTCJul 26, 18:05 UTC8h 35m
2026-07-25 UAL170 EWR → VCE Jul 25, 23:09 UTCJul 26, 06:34 UTC7h 25m
2026-07-25 UAL170 EWR → VCE Jul 25, 23:00 UTCJul 26, 00:30 UTC1h 30m
2026-07-25 UAL736 CMH → IAH Jul 25, 08:35 UTCJul 25, 17:35 UTC9h 0m
2026-07-24 UAL735 IAD → EWR Jul 24, 20:53 UTCJul 25, 05:00 UTC8h 7m
2026-07-24 UAL735 IAD → EWR Jul 24, 20:50 UTCJul 25, 05:00 UTC8h 10m
2026-07-24 UAL50 MAD → EWR Jul 24, 09:20 UTCJul 24, 16:45 UTC7h 25m
2026-07-23 UAL51 EWR → MAD Jul 23, 23:45 UTCJul 24, 06:45 UTC7h 0m
2026-07-23 UAL887 LIM → EWR Jul 23, 06:50 UTCJul 23, 12:30 UTC5h 40m
2026-07-23 UAL887 LIM → EWR Jul 23, 06:18 UTCJul 23, 13:51 UTC7h 33m
2026-07-22 UAL886 EWR → LIM Jul 22, 20:05 UTCJul 23, 03:00 UTC6h 55m
2026-07-21 UAL50 MAD → EWR Jul 21, 23:35 UTCJul 22, 16:30 UTC16h 55m
2026-07-21 UAL860 - Jul 21, 00:55 UTCJul 21, 10:15 UTC9h 20m
2026-07-21 UAL860 GRU → IAD Jul 21, 00:51 UTCJul 21, 10:11 UTC9h 20m
2026-07-20 UAL861 - Jul 20, 03:50 UTCJul 20, 12:55 UTC9h 5m
2026-07-18 UAL127 - Jul 18, 13:45 UTCJul 18, 22:55 UTC9h 10m
2026-07-18 UAL126 IAD → FCO Jul 18, 03:00 UTCJul 18, 11:15 UTC8h 15m
2026-07-16 UAL261 - Jul 16, 09:55 UTCJul 16, 18:00 UTC8h 5m
2026-07-16 UAL51 - Jul 16, 00:10 UTCJul 16, 07:00 UTC6h 50m
2026-07-15 UAL509 - Jul 15, 11:15 UTCJul 15, 20:15 UTC9h 0m
2026-07-15 UAL510 EWR → FCO Jul 15, 00:46 UTCJul 15, 08:16 UTC7h 30m
2026-07-15 UAL510 EWR → FCO Jul 15, 00:25 UTCJul 15, 08:20 UTC7h 55m
2026-07-14 UAL386 DBV → EWR Jul 14, 10:25 UTCJul 14, 19:30 UTC9h 5m
2026-07-13 UAL385 EWR → DBV Jul 13, 23:50 UTCJul 14, 08:00 UTC8h 10m
2026-07-13 UAL736 - Jul 13, 07:55 UTCJul 13, 16:30 UTC8h 35m
2026-07-13 UAL736 PMO → EWR Jul 13, 08:03 UTCJul 13, 17:08 UTC9h 5m
2026-07-12 UAL735 - Jul 12, 20:45 UTCJul 13, 04:55 UTC8h 10m
2026-07-12 UAL237 - Jul 12, 08:20 UTCJul 12, 16:30 UTC8h 10m
2026-07-12 UAL237 PMI → EWR Jul 12, 08:13 UTCJul 12, 16:26 UTC8h 13m
2026-07-11 UAL236 - Jul 11, 20:50 UTCJul 12, 03:55 UTC7h 5m
2026-07-11 UAL50 MAD → EWR Jul 11, 09:18 UTCJul 11, 17:03 UTC7h 45m
2026-07-11 UAL50 MAD → EWR Jul 11, 09:05 UTCJul 11, 16:50 UTC7h 45m
2026-07-10 UAL260 IAD → MAD Jul 10, 22:36 UTCJul 11, 06:04 UTC7h 28m
2026-07-10 UAL260 - Jul 10, 23:00 UTCJul 11, 00:30 UTC1h 30m
2026-07-10 UAL860 - Jul 10, 00:55 UTCJul 10, 01:35 UTC40m
2026-07-10 UAL860 GRU → IAD Jul 10, 00:55 UTCJul 10, 10:13 UTC9h 18m
2026-07-09 UAL861 - Jul 9, 03:30 UTCJul 9, 12:20 UTC8h 50m
2026-07-08 UAL127 - Jul 8, 13:50 UTCJul 8, 23:00 UTC9h 10m
2026-07-08 UAL127 FCO → IAD Jul 8, 13:47 UTCJul 8, 22:58 UTC9h 11m
2026-07-08 UAL126 - Jul 8, 03:05 UTCJul 8, 11:25 UTC8h 20m
2026-07-06 UAL127 - Jul 6, 17:00 UTCJul 7, 02:15 UTC9h 15m
2026-07-06 UAL127 FCO → IAD Jul 6, 17:12 UTCJul 7, 02:16 UTC9h 4m
2026-07-06 UAL126 - Jul 6, 06:25 UTCJul 6, 14:20 UTC7h 55m
2026-07-05 UAL127 - Jul 5, 15:30 UTCJul 6, 00:30 UTC9h 0m
2026-07-05 UAL127 FCO → IAD Jul 5, 15:32 UTCJul 6, 01:10 UTC9h 38m
2026-07-05 UAL126 - Jul 5, 05:30 UTCJul 5, 13:20 UTC7h 50m
2026-07-04 UAL261 - Jul 4, 11:35 UTCJul 4, 19:00 UTC7h 25m
2026-07-04 UAL51 - Jul 4, 02:35 UTCJul 4, 09:25 UTC6h 50m
2026-07-04 UAL51 EWR → MAD Jul 4, 00:05 UTCJul 4, 09:21 UTC9h 16m

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 N59053 page for operator, model, and routing details .

Mode-S A7A08A frequently asked

What is Mode-S code A7A08A?
A7A08A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N59053.
Where is Mode-S A7A08A registered?
Mode-S code A7A08A 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 A7A08A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7A08A, octal 51720212, decimal 10,985,610.
What flights does A7A08A operate?
Mode-S A7A08A has broadcast 20 distinct callsigns, including UAL170, UAL169, UAL50, UAL121, UAL510.