Apparatus

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sensors Mode-S transponder

AA7F05

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N77575 · BOEING 737 MAX 9 · operated by UNITED AIRLINES INC

Hex
AA7F05
Octal
52477405
Decimal
11,173,637
Country
US
Tail
N77575
Type
B39M
No current signal · last broadcast Jul 26, 19:55 UTC
Flights observed
361
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:55 UTC

Last known position

Most recent position reported by Mode-S AA7F05.

Country allocation

The ICAO 24-bit address AA7F05 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
UAL1203 - 6 2026-07-19
UAL1650 United Airlines 5 2026-07-19
UAL1321 - 5 2026-06-20
UAL731 - 4 2026-06-20
UAL2148 United Airlines 4 2026-06-02
UAL1724 United Airlines 4 2026-05-05
UAL1723 United Airlines 4 2026-05-05
UAL1270 United Airlines 4 2026-06-02
UAL624 - 3 2026-04-13
UAL552 - 3 2026-06-17
UAL408 - 3 2026-06-27
UAL2647 United Airlines 3 2026-06-26
UAL240 United Airlines 3 2026-06-16
UAL2380 United Airlines 3 2026-06-08
UAL2219 United Airlines 3 2026-05-10
UAL2125 United Airlines 3 2026-05-30
UAL1995 - 3 2026-04-13
UAL1948 - 3 2026-06-13
UAL1768 - 3 2026-06-22
UAL1664 United Airlines 3 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1167 FLL → EWR Jul 26, 18:05 UTCJul 26, 19:50 UTC1h 45m
2026-07-26 UAL1467 DEN → EWR Jul 26, 12:30 UTCJul 26, 14:55 UTC2h 25m
2026-07-26 UAL1266 LAX → SAL Jul 26, 06:05 UTCJul 26, 10:35 UTC4h 31m
2026-07-26 UAL298 AUS → EWR Jul 26, 03:09 UTCJul 26, 04:04 UTC55m
2026-07-26 UAL298 AUS → EWR Jul 26, 03:05 UTCJul 26, 04:05 UTC1h 0m
2026-07-25 UAL2862 SFO → DEN Jul 25, 19:45 UTCJul 26, 00:55 UTC5h 10m
2026-07-25 UAL2081 SFO → IAH Jul 25, 13:35 UTCJul 25, 18:05 UTC4h 30m
2026-07-25 UAL2215 FLL → EWR Jul 25, 03:15 UTCJul 25, 06:00 UTC2h 45m
2026-07-24 UAL2782 EWR → IAH Jul 24, 22:05 UTCJul 25, 01:05 UTC3h 0m
2026-07-24 UAL353 SAN → EWR Jul 24, 17:25 UTCJul 24, 19:50 UTC2h 25m
2026-07-24 UAL353 SAN → EWR Jul 24, 17:27 UTCJul 24, 19:46 UTC2h 19m
2026-07-24 UAL2018 LAX → TPA Jul 24, 13:32 UTCJul 24, 15:47 UTC2h 15m
2026-07-24 UAL2018 LAX → TPA Jul 24, 13:25 UTCJul 24, 15:45 UTC2h 20m
2026-07-24 UAL1802 IAH → BOS Jul 24, 06:10 UTCJul 24, 10:30 UTC4h 20m
2026-07-23 UAL780 IAD → LAS Jul 23, 21:55 UTCJul 24, 03:05 UTC5h 10m
2026-07-23 UAL1992 PHX → EWR Jul 23, 20:00 UTCJul 23, 20:50 UTC50m
2026-07-23 UAL1498 EWR → SFO Jul 23, 17:05 UTCJul 23, 17:45 UTC40m
2026-07-23 UAL1392 EWR → CLT Jul 23, 13:15 UTCJul 23, 15:40 UTC2h 25m
2026-07-23 UAL1761 SAN → SFO Jul 23, 02:15 UTCJul 23, 04:00 UTC1h 45m
2026-07-22 UAL2747 EWR → INT Jul 22, 22:45 UTCJul 23, 00:15 UTC1h 30m
2026-07-22 UAL2226 ORD → BUF Jul 22, 19:20 UTCJul 22, 20:20 UTC1h 0m
2026-07-22 UAL2124 PDX → SFO Jul 22, 15:00 UTCJul 22, 17:10 UTC2h 10m
2026-07-22 UAL1343 EWR → TPA Jul 22, 02:35 UTCJul 22, 13:10 UTC10h 35m
2026-07-21 UAL1797 IAH → EWR Jul 21, 11:15 UTCJul 21, 14:25 UTC3h 10m
2026-07-20 UAL2782 EWR → IAH Jul 20, 22:50 UTCJul 21, 01:45 UTC2h 55m
2026-07-20 UAL1892 - Jul 20, 19:40 UTCJul 20, 20:45 UTC1h 5m
2026-07-20 UAL2067 IAH → LGA Jul 20, 15:35 UTCJul 20, 17:55 UTC2h 20m
2026-07-20 UAL715 ORD → PBI Jul 20, 11:30 UTCJul 20, 13:45 UTC2h 15m
2026-07-20 UAL1641 IAD → SFO Jul 20, 01:20 UTCJul 20, 02:10 UTC50m
2026-07-19 UAL1650 AUA → ORD Jul 19, 18:30 UTCJul 19, 23:25 UTC4h 55m
2026-07-19 UAL1203 - Jul 19, 16:55 UTCJul 19, 17:15 UTC20m
2026-07-19 UAL1203 IAD → AUA Jul 19, 13:33 UTCJul 19, 17:19 UTC3h 46m
2026-07-19 UAL1203 - Jul 19, 13:25 UTCJul 19, 16:25 UTC3h 0m
2026-07-19 UAL2775 - Jul 19, 02:30 UTCJul 19, 03:15 UTC45m
2026-07-19 UAL2775 IAH → IAD Jul 19, 02:40 UTCJul 19, 04:54 UTC2h 14m
2026-07-18 UAL1535 - Jul 18, 21:50 UTCJul 19, 00:20 UTC2h 30m
2026-07-18 UAL2826 - Jul 18, 16:05 UTCJul 18, 17:30 UTC1h 25m
2026-07-18 UAL2084 ORD → SFO Jul 18, 13:10 UTCJul 18, 14:35 UTC1h 25m
2026-07-18 UAL8127 EWR → IAD Jul 18, 03:30 UTCJul 18, 04:10 UTC40m
2026-07-17 UAL1053 CUN → EWR Jul 17, 21:20 UTCJul 18, 00:50 UTC3h 30m
2026-07-17 UAL1053 CUN → EWR Jul 17, 21:19 UTCJul 18, 00:52 UTC3h 33m
2026-07-17 UAL1177 DEN → CUN Jul 17, 16:10 UTCJul 17, 19:35 UTC3h 25m
2026-07-17 UAL1177 DEN → CUN Jul 17, 16:01 UTCJul 17, 19:33 UTC3h 32m
2026-07-17 UAL1026 DEN → DEN Jul 17, 02:10 UTCJul 17, 13:50 UTC11h 40m
2026-07-16 UAL2852 - Jul 16, 20:09 UTCJul 16, 23:49 UTC3h 40m
2026-06-30 UAL2740 - Jun 30, 22:10 UTCJul 1, 00:30 UTC2h 20m
2026-06-30 UAL1031 - Jun 30, 16:25 UTCJun 30, 19:30 UTC3h 5m
2026-06-29 UAL1031 - Jun 29, 19:20 UTCJun 30, 19:15 UTC23h 56m
2026-06-29 UAL1250 - Jun 29, 17:19 UTCJun 30, 16:55 UTC23h 36m
2026-06-29 UAL2484 - Jun 29, 12:55 UTCJun 29, 14:50 UTC1h 55m

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 N77575 page for operator, model, and routing details .

Mode-S AA7F05 frequently asked

What is Mode-S code AA7F05?
AA7F05 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N77575.
Where is Mode-S AA7F05 registered?
Mode-S code AA7F05 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 AA7F05 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA7F05, octal 52477405, decimal 11,173,637.
What flights does AA7F05 operate?
Mode-S AA7F05 has broadcast 20 distinct callsigns, including UAL1203, UAL1650, UAL1321, UAL731, UAL2148.