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sensors Mode-S transponder

A842AC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N631NN · operated by AMERICAN AIRLINES INC

Hex
A842AC
Octal
52041254
Decimal
11,027,116
Country
US
Tail
N631NN
Type
CRJ9
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
714
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S A842AC.

Country allocation

The ICAO 24-bit address A842AC 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
JIA5294 PSA Airlines 9 2026-06-04
JIA5018 PSA Airlines 7 2026-07-24
JIA5630 PSA Airlines 6 2026-05-14
JIA5607 PSA Airlines 6 2026-07-26
JIA5567 PSA Airlines 6 2026-05-18
JIA5350 PSA Airlines 6 2026-06-05
JIA5222 - 6 2026-06-28
JIA5141 PSA Airlines 6 2026-07-22
JIA5140 PSA Airlines 6 2026-07-23
JIA5109 - 6 2026-06-16
JIA5104 - 6 2026-06-25
JIA5060 - 6 2026-07-09
JIA5638 PSA Airlines 5 2026-05-08
JIA5628 PSA Airlines 5 2026-07-23
JIA5593 - 5 2026-06-18
JIA5579 - 5 2026-07-16
JIA5510 - 5 2026-06-29
JIA5462 - 5 2026-07-15
JIA5413 - 5 2026-06-26
JIA5337 - 5 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JIA5172 DCA → ALB Jul 26, 22:00 UTCJul 26, 23:00 UTC1h 0m
2026-07-26 JIA5172 DCA → ALB Jul 26, 19:40 UTCJul 26, 20:50 UTC1h 10m
2026-07-26 JIA5607 PHL → ATL Jul 26, 15:40 UTCJul 26, 17:40 UTC2h 0m
2026-07-26 JIA5607 PHL → ATL Jul 26, 12:25 UTCJul 26, 14:10 UTC1h 45m
2026-07-25 JIA5019 BUF → PHL Jul 25, 23:45 UTCJul 26, 00:15 UTC30m
2026-07-25 JIA5281 DTW → PHL Jul 25, 20:05 UTCJul 25, 21:40 UTC1h 35m
2026-07-25 JIA5281 DTW → PHL Jul 25, 20:03 UTCJul 25, 21:23 UTC1h 20m
2026-07-25 JIA5281 DTW → PHL Jul 25, 17:30 UTCJul 25, 19:10 UTC1h 40m
2026-07-25 JIA5486 DCA → PHL Jul 25, 11:25 UTCJul 25, 12:55 UTC1h 30m
2026-07-25 JIA5483 DCA → BTR Jul 25, 04:00 UTCJul 25, 05:45 UTC1h 45m
2026-07-25 JIA5532 BNA → DCA Jul 25, 00:40 UTCJul 25, 02:15 UTC1h 35m
2026-07-25 JIA5532 BNA → DCA Jul 25, 00:35 UTCJul 25, 02:11 UTC1h 36m
2026-07-24 JIA5532 BNA → DCA Jul 24, 22:00 UTCJul 24, 23:50 UTC1h 50m
2026-07-24 JIA5018 BTV → DCA Jul 24, 18:15 UTCJul 24, 19:40 UTC1h 25m
2026-07-24 JIA5018 BTV → DCA Jul 24, 15:35 UTCJul 24, 17:15 UTC1h 40m
2026-07-24 JIA5570 SAV → PHL Jul 24, 11:50 UTCJul 24, 13:20 UTC1h 30m
2026-07-23 JIA5382 DCA → BGR Jul 23, 23:50 UTCJul 24, 00:25 UTC35m
2026-07-23 JIA5628 GSP → CLT Jul 23, 22:05 UTCJul 23, 22:20 UTC15m
2026-07-23 JIA5628 GSP → CLT Jul 23, 20:20 UTCJul 23, 22:20 UTC2h 0m
2026-07-23 JIA5628 GSP → CLT Jul 23, 20:13 UTCJul 23, 21:50 UTC1h 37m
2026-07-23 JIA5628 GSP → CLT Jul 23, 17:35 UTCJul 23, 19:10 UTC1h 35m
2026-07-23 JIA5431 CLT → HPN Jul 23, 14:10 UTCJul 23, 15:55 UTC1h 45m
2026-07-23 JIA5431 CLT → HPN Jul 23, 11:45 UTCJul 23, 13:20 UTC1h 35m
2026-07-23 JIA5140 BGR → PHL Jul 23, 09:20 UTCJul 23, 10:15 UTC55m
2026-07-23 JIA5124 BNA → DCA Jul 23, 03:15 UTCJul 23, 04:05 UTC50m
2026-07-23 JIA5024 PHL → SDF Jul 23, 00:25 UTCJul 23, 02:05 UTC1h 40m
2026-07-22 JIA5024 PHL → SDF Jul 22, 22:15 UTCJul 22, 23:30 UTC1h 15m
2026-07-22 JIA5490 ALB → DCA Jul 22, 18:25 UTCJul 22, 19:30 UTC1h 5m
2026-07-22 JIA5490 ALB → DCA Jul 22, 18:24 UTCJul 22, 19:28 UTC1h 4m
2026-07-22 JIA5490 ALB → DCA Jul 22, 16:25 UTCJul 22, 17:25 UTC1h 0m
2026-07-22 JIA5141 CVG → CLT Jul 22, 00:40 UTCJul 22, 01:20 UTC40m
2026-07-21 JIA5141 CVG → CLT Jul 21, 23:15 UTCJul 22, 00:00 UTC45m
2026-07-21 JIA5405 - Jul 21, 17:00 UTCJul 21, 18:30 UTC1h 30m
2026-07-21 JIA5405 - Jul 21, 14:20 UTCJul 21, 15:55 UTC1h 35m
2026-07-21 JIA5234 DAY → CLT Jul 21, 11:10 UTCJul 21, 12:05 UTC55m
2026-07-21 JIA5234 DAY → CLT Jul 21, 11:07 UTCJul 21, 12:04 UTC57m
2026-07-20 JIA5609 DFW → DAY Jul 20, 22:45 UTCJul 21, 00:40 UTC1h 54m
2026-07-20 JIA5541 PHL → ORF Jul 20, 18:40 UTCJul 20, 20:50 UTC2h 10m
2026-07-20 JIA5541 PHL → ORF Jul 20, 15:15 UTCJul 20, 17:15 UTC2h 0m
2026-07-20 JIA5194 DTW → DCA Jul 20, 11:10 UTCJul 20, 12:20 UTC1h 10m
2026-07-20 JIA5194 DTW → DCA Jul 20, 11:07 UTCJul 20, 12:19 UTC1h 12m
2026-07-20 JIA5449 SYR → DCA Jul 20, 04:15 UTCJul 20, 05:20 UTC1h 5m
2026-07-20 JIA5449 SYR → DCA Jul 20, 04:14 UTCJul 20, 05:11 UTC57m
2026-07-20 JIA5574 ICT → DCA Jul 20, 01:25 UTCJul 20, 02:10 UTC45m
2026-07-19 JIA5574 ICT → DCA Jul 19, 23:45 UTCJul 20, 00:20 UTC35m
2026-07-19 JIA5105 - Jul 19, 20:45 UTCJul 19, 22:35 UTC1h 50m
2026-07-19 JIA5105 DFW → SDF Jul 19, 18:05 UTCJul 19, 19:50 UTC1h 45m
2026-07-19 JIA5243 - Jul 19, 16:00 UTCJul 19, 16:55 UTC55m
2026-07-19 JIA5243 - Jul 19, 13:05 UTCJul 19, 13:50 UTC45m
2026-07-18 JIA5365 DAY → PHL Jul 18, 22:15 UTCJul 18, 23:55 UTC1h 40m

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 N631NN page for operator, model, and routing details .

Mode-S A842AC frequently asked

What is Mode-S code A842AC?
A842AC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N631NN.
Where is Mode-S A842AC registered?
Mode-S code A842AC 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 A842AC broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A842AC, octal 52041254, decimal 11,027,116.
What flights does A842AC operate?
Mode-S A842AC has broadcast 20 distinct callsigns, including JIA5294, JIA5018, JIA5630, JIA5607, JIA5567.