Apparatus

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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 5h ago
Flights observed
627
Distinct callsigns
20
Country
US
Last broadcast
5h ago

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
JIA5630 PSA Airlines 6 2026-05-14
JIA5567 PSA Airlines 6 2026-05-18
JIA5350 PSA Airlines 6 2026-06-05
JIA5222 - 6 2026-06-28
JIA5109 - 6 2026-06-16
JIA5104 - 6 2026-06-25
JIA5060 - 6 2026-07-09
JIA5638 PSA Airlines 5 2026-05-08
JIA5593 - 5 2026-06-18
JIA5510 - 5 2026-06-29
JIA5413 - 5 2026-06-26
JIA5337 - 5 2026-07-12
JIA5335 - 5 2026-07-08
JIA5299 - 5 2026-07-03
JIA5212 - 5 2026-06-23
JIA5207 PSA Airlines 5 2026-05-23
JIA5195 - 5 2026-06-17
JIA5140 PSA Airlines 5 2026-06-04
JIA5083 PSA Airlines 5 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 JIA5649 - Jul 14, 00:05 UTCJul 14, 01:15 UTC1h 10m
2026-07-13 JIA5093 - Jul 13, 19:25 UTCJul 13, 21:20 UTC1h 55m
2026-07-13 JIA5093 - Jul 13, 16:10 UTCJul 13, 17:55 UTC1h 45m
2026-07-13 JIA5381 - Jul 13, 13:15 UTCJul 13, 13:40 UTC25m
2026-07-13 JIA5504 - Jul 13, 03:45 UTCJul 13, 04:10 UTC25m
2026-07-12 JIA5672 - Jul 12, 22:45 UTCJul 12, 23:20 UTC35m
2026-07-12 JIA5672 - Jul 12, 21:10 UTCJul 12, 21:50 UTC40m
2026-07-12 JIA5022 - Jul 12, 17:10 UTCJul 12, 18:10 UTC1h 0m
2026-07-12 JIA5337 PVD → DCA Jul 12, 14:20 UTCJul 12, 15:30 UTC1h 10m
2026-07-12 JIA5337 DCA → PVD Jul 12, 12:10 UTCJul 12, 13:05 UTC55m
2026-07-11 JIA5261 - Jul 11, 23:10 UTCJul 12, 01:00 UTC1h 50m
2026-07-11 JIA5261 DCA → ECP Jul 11, 19:50 UTCJul 11, 21:45 UTC1h 55m
2026-07-11 JIA5091 OLV → DCA Jul 11, 16:35 UTCJul 11, 18:15 UTC1h 40m
2026-07-11 JIA5091 - Jul 11, 13:35 UTCJul 11, 15:40 UTC2h 5m
2026-07-11 JIA5160 - Jul 11, 10:40 UTCJul 11, 11:55 UTC1h 15m
2026-07-11 JIA5160 MHT → DCA Jul 11, 10:39 UTCJul 11, 11:51 UTC1h 12m
2026-07-11 JIA5033 - Jul 11, 04:55 UTCJul 11, 06:35 UTC1h 40m
2026-07-11 JIA5307 - Jul 11, 02:05 UTCJul 11, 03:35 UTC1h 30m
2026-07-10 JIA5307 - Jul 10, 18:50 UTCJul 10, 20:40 UTC1h 50m
2026-07-10 JIA5307 CLT → MSN Jul 10, 18:48 UTCJul 10, 20:34 UTC1h 46m
2026-07-10 JIA9955 - Jul 10, 16:15 UTCJul 10, 17:10 UTC55m
2026-07-10 JIA5051 - Jul 10, 15:05 UTCJul 10, 15:15 UTC10m
2026-07-10 JIA5051 - Jul 10, 14:10 UTCJul 10, 15:15 UTC1h 5m
2026-07-10 JIA5051 CMH → DCA Jul 10, 14:09 UTCJul 10, 14:46 UTC37m
2026-07-10 JIA5197 DCA → CMH Jul 10, 06:00 UTCJul 10, 06:50 UTC50m
2026-07-10 JIA5251 - Jul 10, 01:10 UTCJul 10, 02:20 UTC1h 10m
2026-07-09 JIA5251 - Jul 9, 23:15 UTCJul 10, 00:20 UTC1h 5m
2026-07-09 JIA5123 - Jul 9, 19:30 UTCJul 9, 20:35 UTC1h 5m
2026-07-09 JIA5123 CHS → DCA Jul 9, 19:29 UTCJul 9, 20:17 UTC48m
2026-07-09 JIA5123 - Jul 9, 16:35 UTCJul 9, 17:50 UTC1h 15m
2026-07-09 JIA5060 - Jul 9, 14:30 UTCJul 9, 15:25 UTC55m
2026-07-09 JIA5060 BDL → DCA Jul 9, 14:26 UTCJul 9, 15:24 UTC58m
2026-07-09 JIA5060 - Jul 9, 12:05 UTCJul 9, 13:15 UTC1h 10m
2026-07-09 JIA5520 ORF → DCA Jul 9, 10:10 UTCJul 9, 10:55 UTC45m
2026-07-09 JIA5520 ORF → DCA Jul 9, 10:09 UTCJul 9, 10:45 UTC36m
2026-07-08 JIA5335 - Jul 8, 23:00 UTCJul 9, 00:05 UTC1h 5m
2026-07-08 JIA5335 PHL → PHL Jul 8, 22:50 UTCJul 8, 22:55 UTC5m
2026-07-08 JIA5335 PHL → ORF Jul 8, 22:57 UTCJul 8, 23:38 UTC41m
2026-07-08 JIA5631 - Jul 8, 20:25 UTCJul 8, 21:00 UTC35m
2026-07-08 JIA5631 YQB → PHL Jul 8, 20:22 UTCJul 8, 21:46 UTC1h 24m
2026-07-08 JIA5631 - Jul 8, 17:55 UTCJul 8, 19:20 UTC1h 25m
2026-07-08 JIA5576 - Jul 8, 14:30 UTCJul 8, 16:15 UTC1h 45m
2026-07-08 JIA5576 PHL → BNA Jul 8, 11:55 UTCJul 8, 13:30 UTC1h 35m
2026-07-08 JIA5590 - Jul 8, 03:20 UTCJul 8, 04:10 UTC50m
2026-07-08 JIA5590 RDU → PHL Jul 8, 03:15 UTCJul 8, 04:09 UTC54m
2026-07-08 JIA5590 - Jul 8, 02:00 UTCJul 8, 02:20 UTC20m
2026-07-07 JIA5590 PHL → FAY Jul 7, 22:05 UTCJul 7, 23:45 UTC1h 40m
2026-07-07 JIA5018 - Jul 7, 19:15 UTCJul 7, 20:40 UTC1h 25m
2026-07-07 JIA5018 MKE → PHL Jul 7, 19:10 UTCJul 7, 20:41 UTC1h 31m
2026-07-07 JIA5018 - Jul 7, 16:15 UTCJul 7, 17:55 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 5h ago.
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, JIA5630, JIA5567, JIA5350, JIA5222.