Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACB953

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N919NN · BOEING 737-800 · operated by WELLS FARGO TRUST CO NA TRUSTEE

Hex
ACB953
Octal
53134523
Decimal
11,319,635
Country
US
Tail
N919NN
Type
B738
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
581
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S ACB953.

Country allocation

The ICAO 24-bit address ACB953 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
AAL2452 - 8 2026-07-04
AAL874 - 6 2026-07-16
AAL2046 - 6 2026-07-08
AAL1989 American Airlines 6 2026-04-30
AAL1877 - 6 2026-06-29
AAL763 - 5 2026-04-13
AAL2059 American Airlines 5 2026-05-15
AAL2052 American Airlines 5 2026-06-13
AAL1944 American Airlines 5 2026-05-27
AAL1942 - 5 2026-07-17
AAL1931 - 5 2026-06-25
AAL1906 - 5 2026-07-10
AAL1866 American Airlines 5 2026-06-14
AAL1317 - 5 2026-07-06
AAL994 American Airlines 4 2026-07-25
AAL783 American Airlines 4 2026-04-16
AAL3165 - 4 2026-07-02
AAL3116 - 4 2026-06-15
AAL2933 - 4 2026-07-06
AAL2864 American Airlines 4 2026-05-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1320 DEN → DFW Jul 26, 21:40 UTCJul 26, 22:45 UTC1h 5m
2026-07-26 AAL3088 PHX → CLT Jul 26, 17:10 UTCJul 26, 20:15 UTC3h 5m
2026-07-26 AAL1189 ORD → PHL Jul 26, 13:30 UTCJul 26, 15:40 UTC2h 10m
2026-07-26 AAL1376 CLT → EWR Jul 26, 00:55 UTCJul 26, 03:00 UTC2h 5m
2026-07-26 AAL1376 CLT → EWR Jul 26, 00:51 UTCJul 26, 03:01 UTC2h 10m
2026-07-25 AAL1475 CLE → PHL Jul 25, 22:05 UTCJul 25, 23:30 UTC1h 25m
2026-07-25 AAL1475 CLE → PHL Jul 25, 19:10 UTCJul 25, 20:45 UTC1h 35m
2026-07-25 AAL1713 CLT → PHL Jul 25, 15:45 UTCJul 25, 17:30 UTC1h 45m
2026-07-25 AAL1713 CLT → PHL Jul 25, 15:43 UTCJul 25, 17:30 UTC1h 47m
2026-07-25 AAL1713 CLT → PHL Jul 25, 12:55 UTCJul 25, 14:45 UTC1h 50m
2026-07-25 AAL994 PHL → CLT Jul 25, 09:45 UTCJul 25, 11:40 UTC1h 55m
2026-07-25 AAL994 PHL → CLT Jul 25, 09:42 UTCJul 25, 11:38 UTC1h 56m
2026-07-25 AAL1081 IAH → DFW Jul 25, 02:50 UTCJul 25, 04:30 UTC1h 40m
2026-07-24 AAL1356 EWR → CLT Jul 24, 23:50 UTCJul 25, 01:35 UTC1h 45m
2026-07-24 AAL1356 EWR → CLT Jul 24, 21:45 UTCJul 24, 22:30 UTC45m
2026-07-24 AAL1356 EWR → CLT Jul 24, 17:45 UTCJul 24, 19:50 UTC2h 5m
2026-07-24 AAL316 CUN → DFW Jul 24, 13:10 UTCJul 24, 15:30 UTC2h 20m
2026-07-23 AAL2650 DFW → CUN Jul 23, 22:50 UTCJul 24, 01:20 UTC2h 30m
2026-07-23 AAL1609 PHX → DCA Jul 23, 18:08 UTCJul 23, 21:09 UTC3h 1m
2026-07-23 AAL1609 PHX → DCA Jul 23, 18:10 UTCJul 23, 21:15 UTC3h 5m
2026-07-23 AAL1609 PHX → DCA Jul 23, 13:35 UTCJul 23, 16:30 UTC2h 55m
2026-07-23 AAL1108 DTW → DFW Jul 23, 09:55 UTCJul 23, 12:10 UTC2h 15m
2026-07-23 AAL1108 DTW → DFW Jul 23, 09:53 UTCJul 23, 12:11 UTC2h 18m
2026-07-23 AAL690 BOS → PHL Jul 23, 02:14 UTCJul 23, 04:24 UTC2h 10m
2026-07-23 AAL690 BOS → PHL Jul 23, 02:15 UTCJul 23, 04:25 UTC2h 10m
2026-07-21 AAL2145 BOS → DCA Jul 21, 20:46 UTCJul 21, 22:39 UTC1h 53m
2026-07-21 AAL2145 BOS → DCA Jul 21, 20:50 UTCJul 21, 22:40 UTC1h 50m
2026-07-21 AAL2145 BOS → DCA Jul 21, 17:15 UTCJul 21, 19:15 UTC2h 0m
2026-07-21 AAL2425 PSP → DFW Jul 21, 13:10 UTCJul 21, 15:35 UTC2h 25m
2026-07-21 AAL2425 PSP → DFW Jul 21, 13:03 UTCJul 21, 15:34 UTC2h 31m
2026-07-21 AAL2709 DFW → PSP Jul 21, 01:20 UTCJul 21, 03:40 UTC2h 20m
2026-07-20 AAL2140 - Jul 20, 20:10 UTCJul 20, 23:15 UTC3h 5m
2026-07-20 AAL2140 - Jul 20, 16:10 UTCJul 20, 18:50 UTC2h 40m
2026-07-20 AAL1217 CLT → MSN Jul 20, 12:10 UTCJul 20, 14:30 UTC2h 20m
2026-07-20 AAL979 DFW → RDU Jul 20, 00:25 UTCJul 20, 02:50 UTC2h 25m
2026-07-19 AAL394 MSN → CLT Jul 19, 20:05 UTCJul 19, 20:45 UTC40m
2026-07-19 AAL394 MSN → CLT Jul 19, 20:04 UTCJul 19, 22:19 UTC2h 15m
2026-07-19 AAL393 - Jul 19, 16:30 UTCJul 19, 18:30 UTC2h 0m
2026-07-19 AAL393 DFW → MEX Jul 19, 16:28 UTCJul 19, 18:28 UTC2h 0m
2026-07-18 AAL2416 - Jul 18, 23:30 UTCJul 19, 02:10 UTC2h 40m
2026-07-18 AAL2416 DFW → RIC Jul 18, 19:50 UTCJul 18, 22:15 UTC2h 25m
2026-07-18 AAL1279 - Jul 18, 16:30 UTCJul 18, 18:30 UTC2h 0m
2026-07-18 AAL1279 DFW → CMH Jul 18, 12:40 UTCJul 18, 14:45 UTC2h 5m
2026-07-18 AAL2342 - Jul 18, 10:15 UTCJul 18, 11:05 UTC50m
2026-07-18 AAL2441 - Jul 18, 01:20 UTCJul 18, 03:35 UTC2h 16m
2026-07-17 AAL1942 LGA → CLT Jul 17, 22:34 UTCJul 17, 23:57 UTC1h 23m
2026-07-17 AAL1942 - Jul 17, 22:35 UTCJul 17, 23:55 UTC1h 20m
2026-07-17 AAL1942 - Jul 17, 19:35 UTCJul 17, 20:50 UTC1h 15m
2026-07-17 AAL2363 - Jul 17, 17:25 UTCJul 17, 18:00 UTC35m
2026-07-17 AAL2363 RDU → CLT Jul 17, 17:21 UTCJul 17, 17:59 UTC38m

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 N919NN page for operator, model, and routing details .

Mode-S ACB953 frequently asked

What is Mode-S code ACB953?
ACB953 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N919NN.
Where is Mode-S ACB953 registered?
Mode-S code ACB953 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 ACB953 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACB953, octal 53134523, decimal 11,319,635.
What flights does ACB953 operate?
Mode-S ACB953 has broadcast 20 distinct callsigns, including AAL2452, AAL874, AAL2046, AAL1989, AAL1877.