Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD20F4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N945NN · BOEING 737-800 · operated by UMB BANK NA TRUSTEE

Hex
AD20F4
Octal
53220364
Decimal
11,346,164
Country
US
Tail
N945NN
Type
B738
No current signal · last broadcast Jul 26, 22:10 UTC
Flights observed
506
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:10 UTC

Last known position

Most recent position reported by Mode-S AD20F4.

Country allocation

The ICAO 24-bit address AD20F4 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
AAL2318 - 8 2026-07-12
AAL1975 American Airlines 6 2026-07-21
AAL1410 American Airlines 6 2026-07-22
AAL1346 - 6 2026-06-27
AAL3115 - 5 2026-04-13
AAL2208 American Airlines 5 2026-05-19
AAL3258 American Airlines 4 2026-05-17
AAL2973 American Airlines 4 2026-04-17
AAL2089 American Airlines 4 2026-06-21
AAL1838 American Airlines 4 2026-05-29
AAL1592 - 4 2026-06-23
AAL1423 American Airlines 4 2026-07-25
AAL1324 - 4 2026-06-29
AAL790 American Airlines 3 2026-05-01
AAL489 American Airlines 3 2026-05-30
AAL486 American Airlines 3 2026-05-08
AAL475 - 3 2026-04-13
AAL3169 American Airlines 3 2026-05-09
AAL2866 American Airlines 3 2026-05-18
AAL2632 - 3 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2311 IAH → PHL Jul 26, 19:50 UTCJul 26, 22:10 UTC2h 20m
2026-07-26 AAL2366 CLT → PHL Jul 26, 15:50 UTCJul 26, 18:20 UTC2h 30m
2026-07-26 AAL2366 CLT → PHL Jul 26, 12:15 UTCJul 26, 14:40 UTC2h 25m
2026-07-25 AAL328 DFW → ORD Jul 25, 23:20 UTCJul 26, 01:45 UTC2h 25m
2026-07-25 AAL2691 ORD → SFO Jul 25, 19:05 UTCJul 25, 21:15 UTC2h 10m
2026-07-25 AAL1423 LAX → BOS Jul 25, 15:25 UTCJul 25, 17:05 UTC1h 40m
2026-07-25 AAL1423 LAX → BOS Jul 25, 12:45 UTCJul 25, 14:15 UTC1h 30m
2026-07-23 AAL355 GCM → DFW Jul 23, 17:10 UTCJul 24, 00:10 UTC7h 0m
2026-07-22 AAL1410 STL → DFW Jul 22, 14:55 UTCJul 22, 16:15 UTC1h 20m
2026-07-22 AAL1410 STL → DFW Jul 22, 14:52 UTCJul 22, 16:12 UTC1h 20m
2026-07-22 AAL1410 STL → DFW Jul 22, 12:25 UTCJul 22, 13:45 UTC1h 20m
2026-07-21 AAL1975 BDL → CLT Jul 21, 16:15 UTCJul 21, 18:20 UTC2h 5m
2026-07-21 AAL1975 BDL → CLT Jul 21, 12:30 UTCJul 21, 14:35 UTC2h 5m
2026-07-21 AAL2416 CLT → CVG Jul 21, 01:10 UTCJul 21, 03:35 UTC2h 25m
2026-07-20 AAL2416 CLT → CVG Jul 20, 21:30 UTCJul 20, 23:55 UTC2h 24m
2026-07-20 AAL9780 PVD → CLT Jul 20, 18:05 UTCJul 20, 20:20 UTC2h 15m
2026-07-17 AAL2780 ORD → SLC Jul 17, 19:25 UTCJul 17, 22:35 UTC3h 10m
2026-07-17 AAL383 - Jul 17, 13:29 UTCJul 17, 17:30 UTC4h 0m
2026-07-17 AAL2123 - Jul 17, 01:09 UTCJul 17, 02:59 UTC1h 50m
2026-07-17 AAL2123 BNA → LAX Jul 17, 01:09 UTCJul 17, 04:40 UTC3h 31m
2026-07-16 AAL3208 - Jul 16, 21:50 UTCJul 16, 23:59 UTC2h 10m
2026-07-16 AAL2915 DCA → MIA Jul 16, 17:54 UTCJul 16, 19:55 UTC2h 0m
2026-07-16 AAL2915 - Jul 16, 14:10 UTCJul 16, 16:25 UTC2h 15m
2026-07-16 AAL2308 IND → MIA Jul 16, 10:20 UTCJul 16, 12:44 UTC2h 25m
2026-07-16 AAL1945 DFW → IND Jul 16, 00:50 UTCJul 16, 02:40 UTC1h 50m
2026-07-15 AAL1656 - Jul 15, 21:20 UTCJul 15, 23:30 UTC2h 10m
2026-07-15 AAL1656 - Jul 15, 17:15 UTCJul 15, 19:20 UTC2h 5m
2026-07-15 AAL316 CUN → DFW Jul 15, 13:10 UTCJul 15, 15:40 UTC2h 30m
2026-07-14 AAL1507 DFW → CUN Jul 14, 23:20 UTCJul 15, 01:30 UTC2h 10m
2026-07-14 AAL390 - Jul 14, 17:45 UTCJul 14, 20:05 UTC2h 20m
2026-07-14 AAL389 DFW → MEX Jul 14, 14:00 UTCJul 14, 16:05 UTC2h 5m
2026-07-14 AAL1098 - Jul 14, 10:40 UTCJul 14, 11:45 UTC1h 5m
2026-07-14 AAL1732 - Jul 14, 01:45 UTCJul 14, 03:35 UTC1h 50m
2026-07-13 AAL2046 - Jul 13, 22:15 UTCJul 14, 00:00 UTC1h 45m
2026-07-13 AAL2046 - Jul 13, 18:55 UTCJul 13, 20:50 UTC1h 55m
2026-07-13 AAL3161 - Jul 13, 15:25 UTCJul 13, 17:15 UTC1h 50m
2026-07-13 AAL2968 ORD → BOS Jul 13, 12:05 UTCJul 13, 14:05 UTC2h 0m
2026-07-13 AAL627 - Jul 13, 00:45 UTCJul 13, 02:10 UTC1h 25m
2026-07-12 AAL2318 - Jul 12, 20:55 UTCJul 12, 22:40 UTC1h 45m
2026-07-12 AAL2318 - Jul 12, 18:05 UTCJul 12, 19:35 UTC1h 30m
2026-07-12 AAL1548 - Jul 12, 14:20 UTCJul 12, 16:10 UTC1h 50m
2026-07-12 AAL1548 BOS → CLT Jul 12, 14:20 UTCJul 12, 16:10 UTC1h 50m
2026-07-12 AAL1548 - Jul 12, 11:25 UTCJul 12, 13:05 UTC1h 40m
2026-07-10 AAL2412 - Jul 10, 03:05 UTCJul 10, 03:45 UTC40m
2026-07-10 AAL2412 - Jul 10, 01:20 UTCJul 10, 02:00 UTC40m
2026-07-09 AAL2318 - Jul 9, 21:45 UTCJul 9, 23:25 UTC1h 40m
2026-07-09 AAL2318 PVD → CLT Jul 9, 21:42 UTCJul 9, 23:24 UTC1h 42m
2026-07-09 AAL2318 - Jul 9, 18:45 UTCJul 9, 20:15 UTC1h 30m
2026-07-09 AAL2828 - Jul 9, 16:00 UTCJul 9, 17:20 UTC1h 20m
2026-07-09 AAL2828 - Jul 9, 13:35 UTCJul 9, 14:50 UTC1h 15m

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 N945NN page for operator, model, and routing details .

Mode-S AD20F4 frequently asked

What is Mode-S code AD20F4?
AD20F4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N945NN.
Where is Mode-S AD20F4 registered?
Mode-S code AD20F4 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 AD20F4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD20F4, octal 53220364, decimal 11,346,164.
What flights does AD20F4 operate?
Mode-S AD20F4 has broadcast 20 distinct callsigns, including AAL2318, AAL1975, AAL1410, AAL1346, AAL3115.