Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB35CB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N821NN · BOEING 737-800 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
AB35CB
Octal
52632713
Decimal
11,220,427
Country
US
Tail
N821NN
Type
B738
Broadcasting now · callsign AAL1624 · 35,025 ft
Flights observed
480
Distinct callsigns
20
Country
US
Last broadcast
37m ago

Current position

AB35CB is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AB35CB 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
AAL2439 American Airlines 9 2026-06-30
AAL2413 - 6 2026-07-05
AAL1877 American Airlines 6 2026-05-24
AAL1566 American Airlines 6 2026-05-14
AAL9 - 5 2026-06-14
AAL1713 - 5 2026-06-14
AAL526 - 4 2026-07-10
AAL3169 American Airlines 4 2026-05-30
AAL2573 - 4 2026-06-27
AAL2438 American Airlines 4 2026-05-21
AAL2361 American Airlines 4 2026-06-09
AAL2311 - 4 2026-06-29
AAL1819 - 4 2026-06-25
AAL1734 American Airlines 4 2026-05-01
AAL1470 American Airlines 4 2026-05-16
AAL1405 American Airlines 4 2026-06-03
AAL486 American Airlines 3 2026-04-26
AAL3239 American Airlines 3 2026-04-25
AAL3167 - 3 2026-06-16
AAL3145 - 3 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AAL1624 - Jul 14, 15:20 UTCJul 14, 16:45 UTC1h 25m
2026-07-14 AAL1091 - Jul 14, 12:15 UTCJul 14, 13:35 UTC1h 20m
2026-07-14 AAL1607 - Jul 14, 05:30 UTCJul 14, 06:30 UTC1h 0m
2026-07-14 AAL2598 GDL → DFW Jul 14, 00:54 UTCJul 14, 03:01 UTC2h 7m
2026-07-13 AAL2598 DFW → DFW Jul 13, 21:15 UTCJul 14, 03:20 UTC6h 5m
2026-07-13 AAL1975 - Jul 13, 15:45 UTCJul 13, 18:00 UTC2h 15m
2026-07-13 AAL1975 - Jul 13, 12:35 UTCJul 13, 14:30 UTC1h 55m
2026-07-13 AAL1842 AUS → DFW Jul 13, 05:05 UTCJul 13, 06:20 UTC1h 15m
2026-07-12 AAL1842 - Jul 12, 23:15 UTCJul 13, 02:10 UTC2h 55m
2026-07-12 AAL1842 - Jul 12, 17:55 UTCJul 12, 19:35 UTC1h 40m
2026-07-12 AAL1374 - Jul 12, 13:20 UTCJul 12, 15:25 UTC2h 5m
2026-07-11 AAL2233 DFW → MEX Jul 11, 23:00 UTCJul 12, 01:15 UTC2h 15m
2026-07-11 AAL2233 DFW → MEX Jul 11, 22:59 UTCJul 12, 01:12 UTC2h 13m
2026-07-11 AAL1529 - Jul 11, 18:40 UTCJul 11, 21:10 UTC2h 30m
2026-07-11 AAL1529 DFW → BOI Jul 11, 14:25 UTCJul 11, 17:10 UTC2h 45m
2026-07-11 AAL1376 ATL → DFW Jul 11, 02:05 UTCJul 11, 03:50 UTC1h 45m
2026-07-10 AAL1376 - Jul 10, 23:40 UTCJul 11, 00:15 UTC35m
2026-07-10 AAL1376 - Jul 10, 18:45 UTCJul 10, 20:45 UTC2h 0m
2026-07-10 AAL413 DCA → LGA Jul 10, 16:45 UTCJul 10, 17:30 UTC45m
2026-07-10 AAL413 DCA → LGA Jul 10, 14:15 UTCJul 10, 15:00 UTC45m
2026-07-10 AAL2821 - Jul 10, 10:00 UTCJul 10, 11:25 UTC1h 25m
2026-07-10 AAL526 - Jul 10, 03:50 UTCJul 10, 04:50 UTC1h 0m
2026-07-10 AAL526 CLT → BNA Jul 10, 03:47 UTCJul 10, 04:46 UTC59m
2026-07-09 AAL1443 - Jul 9, 22:50 UTCJul 10, 00:50 UTC2h 0m
2026-07-09 AAL1443 BDL → CLT Jul 9, 22:49 UTCJul 10, 00:49 UTC2h 0m
2026-07-09 AAL1443 - Jul 9, 18:45 UTCJul 9, 21:00 UTC2h 15m
2026-07-09 AAL1890 - Jul 9, 16:05 UTCJul 9, 17:20 UTC1h 15m
2026-07-09 AAL1890 GRR → CLT Jul 9, 16:00 UTCJul 9, 17:19 UTC1h 19m
2026-07-09 AAL1890 - Jul 9, 13:25 UTCJul 9, 14:45 UTC1h 20m
2026-07-09 AAL3206 - Jul 9, 10:35 UTCJul 9, 11:35 UTC1h 0m
2026-07-08 AAL1689 PHX → CMH Jul 8, 16:15 UTCJul 8, 19:40 UTC3h 25m
2026-07-07 AAL455 AUS → PHX Jul 7, 11:50 UTCJul 7, 13:50 UTC2h 0m
2026-07-07 AAL2118 LAX → AUS Jul 7, 04:10 UTCJul 7, 06:40 UTC2h 30m
2026-07-06 AAL2547 - Jul 6, 22:35 UTCJul 7, 01:55 UTC3h 20m
2026-07-06 AAL2546 - Jul 6, 17:35 UTCJul 6, 18:45 UTC1h 10m
2026-07-06 AAL2546 LAX → MEX Jul 6, 17:34 UTCJul 6, 20:52 UTC3h 18m
2026-07-06 AAL1225 - Jul 6, 10:35 UTCJul 6, 15:15 UTC4h 40m
2026-07-06 AAL1132 DFW → IAD Jul 6, 00:10 UTCJul 6, 02:45 UTC2h 35m
2026-07-05 AAL2413 - Jul 5, 19:30 UTCJul 5, 22:15 UTC2h 45m
2026-07-05 AAL2413 - Jul 5, 15:45 UTCJul 5, 18:10 UTC2h 25m
2026-07-05 AAL882 - Jul 5, 11:15 UTCJul 5, 14:00 UTC2h 45m
2026-07-05 AAL564 - Jul 5, 02:25 UTCJul 5, 03:30 UTC1h 5m
2026-07-05 AAL564 ORD → BUF Jul 5, 02:22 UTCJul 5, 03:26 UTC1h 4m
2026-07-04 AAL2089 ORD → SNA Jul 4, 22:00 UTCJul 5, 00:55 UTC2h 55m
2026-07-04 AAL2089 ORD → SNA Jul 4, 17:10 UTCJul 4, 19:35 UTC2h 25m
2026-07-04 AAL1038 - Jul 4, 14:00 UTCJul 4, 15:30 UTC1h 30m
2026-07-04 AAL3084 - Jul 4, 10:10 UTCJul 4, 11:30 UTC1h 20m
2026-07-04 AAL3050 MFE → DFW Jul 4, 01:35 UTCJul 4, 03:25 UTC1h 50m
2026-07-03 AAL1744 - Jul 3, 21:00 UTCJul 3, 23:00 UTC2h 0m
2026-07-03 AAL1744 - Jul 3, 15:30 UTCJul 3, 17:40 UTC2h 10m

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 N821NN page for operator, model, and routing details .

Mode-S AB35CB frequently asked

What is Mode-S code AB35CB?
AB35CB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N821NN.
Where is Mode-S AB35CB registered?
Mode-S code AB35CB 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 AB35CB broadcasting right now?
Yes. Mode-S AB35CB is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB35CB, octal 52632713, decimal 11,220,427.
What flights does AB35CB operate?
Mode-S AB35CB has broadcast 20 distinct callsigns, including AAL2439, AAL2413, AAL1877, AAL1566, AAL9.