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sensors Mode-S transponder

A8553F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N636NN · BOMBARDIER Regional Jet CRJ-900 · operated by AMERICAN AIRLINES INC

Hex
A8553F
Octal
52052477
Decimal
11,031,871
Country
US
Tail
N636NN
Type
CRJ9
No current signal · last broadcast Jul 26, 20:25 UTC
Flights observed
657
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S A8553F.

Country allocation

The ICAO 24-bit address A8553F 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
JIA5475 PSA Airlines 9 2026-06-16
JIA5331 PSA Airlines 9 2026-05-02
JIA5179 PSA Airlines 9 2026-07-24
JIA5661 PSA Airlines 8 2026-05-07
JIA5061 PSA Airlines 8 2026-05-07
JIA5655 - 7 2026-06-19
JIA5058 PSA Airlines 7 2026-06-12
JIA5658 PSA Airlines 6 2026-07-25
JIA5503 PSA Airlines 6 2026-06-10
JIA5444 - 6 2026-06-25
JIA5442 PSA Airlines 6 2026-06-15
JIA5304 PSA Airlines 6 2026-06-20
JIA5285 - 6 2026-07-12
JIA5168 PSA Airlines 6 2026-05-05
JIA5657 PSA Airlines 5 2026-05-04
JIA5581 - 5 2026-04-13
JIA5554 PSA Airlines 5 2026-04-18
JIA5534 - 5 2026-07-08
JIA5397 PSA Airlines 5 2026-07-24
JIA5340 - 5 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JIA5189 SBN → CLT Jul 26, 19:25 UTCJul 26, 20:15 UTC50m
2026-07-26 JIA5189 SBN → CLT Jul 26, 17:35 UTCJul 26, 18:20 UTC45m
2026-07-26 JIA5037 YUL → CLT Jul 26, 14:30 UTCJul 26, 16:05 UTC1h 35m
2026-07-26 JIA5037 YUL → CLT Jul 26, 11:55 UTCJul 26, 13:30 UTC1h 35m
2026-07-26 JIA5487 DFW → CAE Jul 26, 10:05 UTCJul 26, 10:50 UTC45m
2026-07-26 JIA5487 DFW → CAE Jul 26, 10:02 UTCJul 26, 10:47 UTC45m
2026-07-26 JIA5320 MHT → PHL Jul 26, 02:50 UTCJul 26, 03:35 UTC45m
2026-07-25 JIA5658 PHL → GSP Jul 25, 23:00 UTCJul 26, 01:00 UTC2h 0m
2026-07-25 JIA5658 PHL → GSP Jul 25, 19:40 UTCJul 25, 22:05 UTC2h 25m
2026-07-25 JIA5430 DCA → AVL Jul 25, 17:00 UTCJul 25, 18:35 UTC1h 35m
2026-07-25 JIA5433 DCA → ALB Jul 25, 14:40 UTCJul 25, 16:10 UTC1h 30m
2026-07-25 JIA5433 DCA → ALB Jul 25, 14:35 UTCJul 25, 16:14 UTC1h 39m
2026-07-25 JIA5211 PHL → MKE Jul 25, 11:38 UTCJul 25, 12:40 UTC1h 2m
2026-07-25 JIA5133 OAJ → CLT Jul 25, 03:15 UTCJul 25, 04:10 UTC55m
2026-07-25 JIA5258 MHT → PHL Jul 25, 00:45 UTCJul 25, 01:40 UTC55m
2026-07-24 JIA5258 MHT → PHL Jul 24, 23:15 UTCJul 25, 00:00 UTC45m
2026-07-24 JIA5397 BHM → PHL Jul 24, 20:30 UTCJul 24, 21:30 UTC1h 0m
2026-07-24 JIA5397 BHM → PHL Jul 24, 20:26 UTCJul 24, 21:28 UTC1h 2m
2026-07-24 JIA5397 BHM → PHL Jul 24, 18:45 UTCJul 24, 19:40 UTC55m
2026-07-24 JIA5179 PHL → RDU Jul 24, 16:10 UTCJul 24, 17:30 UTC1h 20m
2026-07-24 JIA5179 PHL → RDU Jul 24, 16:08 UTCJul 24, 17:31 UTC1h 23m
2026-07-24 JIA5179 PHL → RDU Jul 24, 13:55 UTCJul 24, 15:00 UTC1h 5m
2026-07-24 JIA5049 PHL → SDF Jul 24, 11:17 UTCJul 24, 11:59 UTC42m
2026-07-24 JIA5049 PHL → SDF Jul 24, 11:20 UTCJul 24, 12:00 UTC40m
2026-07-24 JIA5273 PHL → DAY Jul 24, 00:30 UTCJul 24, 02:00 UTC1h 30m
2026-07-23 JIA5559 BUF → PHL Jul 23, 18:55 UTCJul 23, 21:05 UTC2h 10m
2026-07-23 JIA5559 BUF → PHL Jul 23, 15:25 UTCJul 23, 18:00 UTC2h 35m
2026-07-23 JIA5488 MLB → CLT Jul 23, 10:55 UTCJul 23, 13:05 UTC2h 10m
2026-07-23 JIA5488 MLB → CLT Jul 23, 10:52 UTCJul 23, 12:50 UTC1h 58m
2026-07-23 JIA5460 DCA → LAN Jul 23, 00:38 UTCJul 23, 03:09 UTC2h 31m
2026-07-23 JIA5460 DCA → LAN Jul 23, 00:40 UTCJul 23, 03:10 UTC2h 30m
2026-07-22 JIA5249 MEM → PHL Jul 22, 21:30 UTCJul 22, 22:50 UTC1h 20m
2026-07-22 JIA5249 MEM → PHL Jul 22, 19:15 UTCJul 22, 20:40 UTC1h 25m
2026-07-22 JIA5209 CLT → CVG Jul 22, 15:42 UTCJul 22, 16:52 UTC1h 10m
2026-07-22 JIA5209 CLT → CVG Jul 22, 12:50 UTCJul 22, 14:25 UTC1h 35m
2026-07-22 JIA5139 PIT → PHL Jul 22, 11:10 UTCJul 22, 11:20 UTC10m
2026-07-22 JIA5139 PIT → PHL Jul 22, 10:16 UTCJul 22, 11:19 UTC1h 3m
2026-07-22 JIA5043 PHL → BGR Jul 22, 02:21 UTCJul 22, 03:19 UTC58m
2026-07-22 JIA5043 PHL → BGR Jul 22, 02:25 UTCJul 22, 03:20 UTC55m
2026-07-21 JIA5474 MHT → CLT Jul 21, 17:55 UTCJul 21, 18:25 UTC30m
2026-07-21 JIA5527 PWM → DCA Jul 21, 15:20 UTCJul 21, 16:25 UTC1h 5m
2026-07-21 JIA5679 DCA → PHL Jul 21, 11:40 UTCJul 21, 13:30 UTC1h 50m
2026-07-21 JIA5679 DCA → PHL Jul 21, 11:38 UTCJul 21, 13:31 UTC1h 53m
2026-07-21 JIA5137 - Jul 21, 01:45 UTCJul 21, 03:35 UTC1h 50m
2026-07-20 JIA5275 MYR → PHL Jul 20, 22:50 UTCJul 20, 23:55 UTC1h 5m
2026-07-20 JIA5275 MYR → PHL Jul 20, 20:50 UTCJul 20, 21:55 UTC1h 5m
2026-07-20 JIA5113 GSP → DCA Jul 20, 18:00 UTCJul 20, 19:10 UTC1h 10m
2026-07-20 JIA5113 GSP → DCA Jul 20, 17:55 UTCJul 20, 18:53 UTC58m
2026-07-20 JIA5113 GSP → DCA Jul 20, 15:55 UTCJul 20, 17:00 UTC1h 5m
2026-07-20 JIA5381 DCA → RDU Jul 20, 13:25 UTCJul 20, 13:50 UTC25m

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 N636NN page for operator, model, and routing details .

Mode-S A8553F frequently asked

What is Mode-S code A8553F?
A8553F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N636NN.
Where is Mode-S A8553F registered?
Mode-S code A8553F 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 A8553F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8553F, octal 52052477, decimal 11,031,871.
What flights does A8553F operate?
Mode-S A8553F has broadcast 20 distinct callsigns, including JIA5475, JIA5331, JIA5179, JIA5661, JIA5061.