Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AA7F2B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N77588 · operated by UMB BANK NA TRUSTEE

Hex
AA7F2B
Octal
52477453
Decimal
11,173,675
Country
US
Tail
N77588
Type
B39M
No current signal · last broadcast Jul 26, 21:10 UTC
Flights observed
390
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:10 UTC

Last known position

Most recent position reported by Mode-S AA7F2B.

Country allocation

The ICAO 24-bit address AA7F2B 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
UAL1387 - 7 2026-06-19
UAL2855 United Airlines 6 2026-05-14
UAL727 United Airlines 5 2026-05-27
UAL1039 United Airlines 5 2026-07-26
UAL2681 United Airlines 4 2026-05-14
UAL1804 United Airlines 4 2026-07-23
UAL1797 United Airlines 4 2026-06-14
UAL1437 United Airlines 4 2026-05-28
UAL630 United Airlines 3 2026-04-16
UAL519 - 3 2026-07-02
UAL492 - 3 2026-07-12
UAL469 United Airlines 3 2026-05-18
UAL326 United Airlines 3 2026-04-21
UAL2223 United Airlines 3 2026-07-25
UAL1863 United Airlines 3 2026-04-17
UAL1795 - 3 2026-07-01
UAL1705 United Airlines 3 2026-04-15
UAL1674 United Airlines 3 2026-07-26
UAL1635 United Airlines 3 2026-04-14
UAL1611 - 3 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1039 AUA → EWR Jul 26, 20:55 UTCJul 26, 21:10 UTC15m
2026-07-26 UAL1674 RDU → EWR Jul 26, 14:50 UTCJul 26, 19:15 UTC4h 25m
2026-07-26 UAL1640 EWR → CHS Jul 26, 04:55 UTCJul 26, 10:15 UTC5h 21m
2026-07-25 UAL2223 CPT → IAD Jul 25, 21:30 UTCJul 26, 03:30 UTC6h 0m
2026-07-25 UAL2223 CPT → IAD Jul 25, 18:25 UTCJul 25, 19:05 UTC40m
2026-07-25 UAL2223 CPT → IAD Jul 25, 16:40 UTCJul 25, 18:20 UTC1h 40m
2026-07-25 UAL2326 ORD → TPA Jul 25, 12:50 UTCJul 25, 14:55 UTC2h 5m
2026-07-25 UAL1738 MCO → EWR Jul 25, 02:40 UTCJul 25, 04:15 UTC1h 35m
2026-07-24 UAL1817 IAD → PLS Jul 24, 16:55 UTCJul 25, 00:10 UTC7h 15m
2026-07-24 UAL276 ATL → EWR Jul 24, 13:10 UTCJul 24, 14:50 UTC1h 40m
2026-07-24 UAL689 IAD → MCO Jul 24, 03:10 UTCJul 24, 04:55 UTC1h 45m
2026-07-23 UAL1648 AUA → IAD Jul 23, 20:45 UTCJul 24, 00:40 UTC3h 55m
2026-07-23 UAL1804 IAH → AUA Jul 23, 15:00 UTCJul 23, 16:45 UTC1h 45m
2026-07-23 UAL1804 IAH → AUA Jul 23, 15:00 UTCJul 23, 19:00 UTC4h 0m
2026-07-23 UAL2358 SAN → EWR Jul 23, 11:15 UTCJul 23, 13:05 UTC1h 50m
2026-07-23 UAL465 IAH → PDX Jul 23, 01:30 UTCJul 23, 03:20 UTC1h 50m
2026-07-22 UAL2815 IAD → NRT Jul 22, 20:00 UTCJul 22, 23:05 UTC3h 5m
2026-07-22 UAL2815 IAD → NRT Jul 22, 20:06 UTCJul 22, 23:05 UTC2h 59m
2026-07-22 UAL2080 ORD → SFO Jul 22, 15:35 UTCJul 22, 18:10 UTC2h 35m
2026-07-22 UAL2213 LAX → EWR Jul 22, 02:45 UTCJul 22, 05:25 UTC2h 40m
2026-07-21 UAL3021 HNL → SFO Jul 21, 16:35 UTCJul 21, 20:45 UTC4h 10m
2026-07-21 UAL3021 HNL → SFO Jul 21, 16:25 UTCJul 21, 20:46 UTC4h 21m
2026-07-20 UAL1425 EWR → SAL Jul 20, 22:45 UTCJul 21, 03:00 UTC4h 14m
2026-07-20 UAL1611 - Jul 20, 17:15 UTCJul 20, 20:00 UTC2h 45m
2026-07-20 UAL2444 EWR → FLL Jul 20, 13:15 UTCJul 20, 15:45 UTC2h 30m
2026-07-20 UAL339 - Jul 20, 07:10 UTCJul 20, 10:50 UTC3h 40m
2026-07-20 UAL1425 - Jul 20, 00:50 UTCJul 20, 05:15 UTC4h 25m
2026-07-19 UAL2489 - Jul 19, 19:35 UTCJul 19, 20:55 UTC1h 20m
2026-07-19 UAL1984 - Jul 19, 12:05 UTCJul 19, 12:55 UTC50m
2026-07-19 UAL1984 EWR → SDQ Jul 19, 12:15 UTCJul 19, 15:14 UTC2h 59m
2026-07-18 UAL1274 SEA → EWR Jul 18, 06:15 UTCJul 18, 10:40 UTC4h 25m
2026-07-17 UAL2387 EWR → SEA Jul 17, 20:35 UTCJul 18, 01:50 UTC5h 15m
2026-07-17 UAL2080 MIA → EWR Jul 17, 15:40 UTCJul 17, 18:10 UTC2h 30m
2026-07-17 UAL2785 EWR → HNL Jul 17, 11:10 UTCJul 17, 13:29 UTC2h 20m
2026-07-16 UAL1651 MCO → EWR Jul 16, 23:15 UTCJul 17, 01:20 UTC2h 5m
2026-07-16 UAL1213 - Jul 16, 19:35 UTCJul 16, 21:45 UTC2h 10m
2026-07-16 UAL1988 CUN → EWR Jul 16, 13:54 UTCJul 16, 17:49 UTC3h 55m
2026-07-15 UAL1020 - Jul 15, 22:30 UTCJul 15, 22:45 UTC15m
2026-07-15 UAL1020 IAH → CUN Jul 15, 22:24 UTCJul 16, 00:11 UTC1h 47m
2026-07-15 UAL2038 - Jul 15, 17:15 UTCJul 15, 20:10 UTC2h 55m
2026-07-15 UAL2642 - Jul 15, 12:55 UTCJul 15, 15:50 UTC2h 55m
2026-07-15 UAL2203 - Jul 15, 07:35 UTCJul 15, 10:05 UTC2h 30m
2026-07-14 UAL742 - Jul 14, 23:05 UTCJul 15, 01:20 UTC2h 15m
2026-07-14 UAL1017 - Jul 14, 19:15 UTCJul 14, 21:05 UTC1h 50m
2026-07-14 UAL1050 EWR → CUN Jul 14, 14:05 UTCJul 14, 17:20 UTC3h 15m
2026-07-14 UAL1050 EWR → CUN Jul 14, 14:07 UTCJul 14, 17:16 UTC3h 9m
2026-07-13 UAL1053 CUN → EWR Jul 13, 21:00 UTCJul 14, 00:30 UTC3h 30m
2026-07-13 UAL1177 DEN → CUN Jul 13, 16:00 UTCJul 13, 19:25 UTC3h 25m
2026-07-13 UAL1026 - Jul 13, 13:20 UTCJul 13, 13:50 UTC30m
2026-07-13 UAL1092 - Jul 13, 02:01 UTCJul 13, 02:40 UTC40m

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 N77588 page for operator, model, and routing details .

Mode-S AA7F2B frequently asked

What is Mode-S code AA7F2B?
AA7F2B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N77588.
Where is Mode-S AA7F2B registered?
Mode-S code AA7F2B 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 AA7F2B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA7F2B, octal 52477453, decimal 11,173,675.
What flights does AA7F2B operate?
Mode-S AA7F2B has broadcast 20 distinct callsigns, including UAL1387, UAL2855, UAL727, UAL1039, UAL2681.