Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AA7F02

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N77572 · BOEING 737 MAX 9 · operated by UNITED AIRLINES INC

Hex
AA7F02
Octal
52477402
Decimal
11,173,634
Country
US
Tail
N77572
Type
B39M
No current signal · last broadcast 6h ago
Flights observed
315
Distinct callsigns
20
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S AA7F02.

Country allocation

The ICAO 24-bit address AA7F02 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
UAL1019 United Airlines 6 2026-06-11
UAL1648 United Airlines 5 2026-06-06
UAL420 United Airlines 4 2026-06-04
UAL2861 - 4 2026-04-13
UAL1804 United Airlines 4 2026-06-06
UAL1670 United Airlines 4 2026-05-06
UAL1664 United Airlines 4 2026-06-16
UAL1461 United Airlines 4 2026-05-06
UAL1054 United Airlines 4 2026-06-05
UAL1016 United Airlines 4 2026-06-11
UAL2691 United Airlines 3 2026-05-26
UAL2456 - 3 2026-06-12
UAL2379 United Airlines 3 2026-06-12
UAL2345 - 3 2026-04-16
UAL2024 - 3 2026-06-15
UAL1704 United Airlines 3 2026-04-15
UAL1661 United Airlines 3 2026-06-16
UAL1644 United Airlines 3 2026-06-13
UAL1617 United Airlines 3 2026-06-12
UAL1123 United Airlines 3 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 UAL1043 - Jul 13, 21:55 UTCJul 14, 02:00 UTC4h 5m
2026-07-13 UAL1043 AUA → EWR Jul 13, 22:05 UTCJul 14, 01:58 UTC3h 53m
2026-07-13 UAL1042 - Jul 13, 19:55 UTCJul 13, 20:10 UTC15m
2026-07-13 UAL1042 - Jul 13, 16:00 UTCJul 13, 16:45 UTC45m
2026-07-13 UAL577 MCO → EWR Jul 13, 12:00 UTCJul 13, 14:15 UTC2h 15m
2026-07-13 UAL577 MCO → EWR Jul 13, 11:55 UTCJul 13, 14:10 UTC2h 15m
2026-07-12 UAL1213 EWR → MCO Jul 12, 19:35 UTCJul 12, 22:00 UTC2h 25m
2026-07-12 UAL1864 - Jul 12, 11:30 UTCJul 12, 13:55 UTC2h 25m
2026-06-21 UAL2740 - Jun 21, 22:20 UTCJun 22, 00:24 UTC2h 5m
2026-06-21 UAL1535 - Jun 21, 17:35 UTCJun 21, 20:29 UTC2h 55m
2026-06-21 UAL1413 - Jun 21, 14:34 UTCJun 21, 15:25 UTC50m
2026-06-21 UAL570 BOS → EWR Jun 21, 11:34 UTCJun 21, 12:19 UTC45m
2026-06-21 UAL1800 ORD → BOS Jun 21, 01:22 UTCJun 21, 02:52 UTC1h 30m
2026-06-21 UAL1800 - Jun 21, 01:05 UTCJun 21, 02:50 UTC1h 45m
2026-06-20 UAL308 - Jun 20, 21:10 UTCJun 20, 22:59 UTC1h 50m
2026-06-20 UAL2182 - Jun 20, 17:04 UTCJun 20, 18:29 UTC1h 25m
2026-06-20 UAL2182 - Jun 20, 12:50 UTCJun 20, 15:24 UTC2h 35m
2026-06-19 UAL2002 - Jun 19, 22:04 UTCJun 20, 01:19 UTC3h 15m
2026-06-19 UAL2002 BOS → SFO Jun 19, 13:34 UTCJun 19, 19:49 UTC6h 15m
2026-06-19 UAL1665 SFO → BOS Jun 19, 06:24 UTCJun 19, 11:04 UTC4h 40m
2026-06-19 UAL1118 CUN → SFO Jun 19, 00:05 UTCJun 19, 03:44 UTC3h 39m
2026-06-18 UAL1618 IAD → CUN Jun 18, 17:45 UTCJun 18, 21:12 UTC3h 27m
2026-06-18 UAL1618 - Jun 18, 18:00 UTCJun 18, 20:20 UTC2h 20m
2026-06-18 UAL204 BOS → IAD Jun 18, 12:25 UTCJun 18, 15:40 UTC3h 15m
2026-06-17 UAL1822 SAN → ORD Jun 17, 22:05 UTCJun 18, 01:35 UTC3h 30m
2026-06-17 UAL1873 ORD → MSN Jun 17, 16:05 UTCJun 17, 20:05 UTC4h 0m
2026-06-17 UAL602 ORD → PHX Jun 17, 02:45 UTCJun 17, 05:45 UTC3h 0m
2026-06-16 UAL1664 PUJ → ORD Jun 16, 19:08 UTCJun 16, 23:10 UTC4h 2m
2026-06-16 UAL1661 IAD → PUJ Jun 16, 13:04 UTCJun 16, 23:25 UTC10h 21m
2026-06-16 UAL1734 BOS → IAD Jun 16, 09:55 UTCJun 16, 11:10 UTC1h 15m
2026-06-16 UAL755 IAD → BOS Jun 16, 02:34 UTCJun 16, 03:39 UTC1h 5m
2026-06-15 UAL2024 - Jun 15, 23:35 UTCJun 16, 00:35 UTC1h 0m
2026-06-15 UAL2024 - Jun 15, 21:14 UTCJun 15, 21:25 UTC10m
2026-06-15 UAL2024 SJU → IAD Jun 15, 21:16 UTCJun 16, 00:33 UTC3h 17m
2026-06-15 UAL1192 IAH → SJU Jun 15, 19:35 UTCJun 15, 19:50 UTC15m
2026-06-15 UAL1192 IAH → SJU Jun 15, 15:50 UTCJun 15, 17:59 UTC2h 10m
2026-06-15 UAL575 BOS → ORD Jun 15, 12:00 UTCJun 15, 14:10 UTC2h 10m
2026-06-15 UAL2864 IAH → CLT Jun 15, 00:20 UTCJun 15, 02:24 UTC2h 5m
2026-06-14 UAL1036 ORD → PHL Jun 14, 18:55 UTCJun 14, 21:15 UTC2h 20m
2026-06-14 UAL2009 IAH → LIR Jun 14, 13:35 UTCJun 14, 15:50 UTC2h 15m
2026-06-14 UAL2009 IAH → LIR Jun 14, 13:09 UTCJun 14, 16:50 UTC3h 41m
2026-06-13 UAL754 LAS → EWR Jun 13, 23:30 UTCJun 14, 00:05 UTC35m
2026-06-13 UAL754 LAS → EWR Jun 13, 21:56 UTCJun 14, 00:00 UTC2h 4m
2026-06-13 UAL753 SFO → ATL Jun 13, 17:55 UTCJun 13, 18:10 UTC15m
2026-06-13 UAL753 SFO → ATL Jun 13, 18:00 UTCJun 13, 20:16 UTC2h 16m
2026-06-13 UAL1644 SJU → IAH Jun 13, 13:10 UTCJun 13, 14:30 UTC1h 20m
2026-06-13 UAL1644 SJU → IAH Jun 13, 11:25 UTCJun 13, 11:35 UTC10m
2026-06-13 UAL1644 SJU → IAH Jun 13, 11:13 UTCJun 13, 15:32 UTC4h 19m
2026-06-13 UAL1497 SFO → IAH Jun 13, 09:05 UTCJun 13, 09:20 UTC15m
2026-06-13 UAL1497 SFO → IAH Jun 13, 05:20 UTCJun 13, 07:30 UTC2h 10m

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 N77572 page for operator, model, and routing details .

Mode-S AA7F02 frequently asked

What is Mode-S code AA7F02?
AA7F02 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N77572.
Where is Mode-S AA7F02 registered?
Mode-S code AA7F02 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 AA7F02 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA7F02, octal 52477402, decimal 11,173,634.
What flights does AA7F02 operate?
Mode-S AA7F02 has broadcast 20 distinct callsigns, including UAL1019, UAL1648, UAL420, UAL2861, UAL1804.