Apparatus

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sensors Mode-S transponder

AB2C04

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N819NN · BOEING 737-800 · operated by AMERICAN AIRLINES INC

Hex
AB2C04
Octal
52626004
Decimal
11,217,924
Country
US
Tail
N819NN
Type
B738
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
558
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S AB2C04.

Country allocation

The ICAO 24-bit address AB2C04 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
AAL2922 American Airlines 6 2026-04-13
AAL1998 - 6 2026-06-29
AAL1936 American Airlines 6 2026-06-09
AAL903 American Airlines 5 2026-05-14
AAL3280 American Airlines 5 2026-05-08
AAL3022 American Airlines 5 2026-07-23
AAL2733 - 5 2026-06-16
AAL2509 American Airlines 5 2026-05-06
AAL2043 American Airlines 5 2026-06-03
AAL1352 American Airlines 5 2026-06-02
AAL1241 American Airlines 5 2026-04-28
AAL618 - 4 2026-07-05
AAL3185 - 4 2026-07-01
AAL2358 American Airlines 4 2026-05-08
AAL2301 - 4 2026-06-20
AAL2118 - 4 2026-06-24
AAL2036 American Airlines 4 2026-06-05
AAL1939 - 4 2026-07-13
AAL1858 American Airlines 4 2026-06-02
AAL1540 American Airlines 4 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1397 BOS → MIA Jul 26, 20:35 UTCJul 26, 21:20 UTC45m
2026-07-26 AAL2578 MIA → SAN Jul 26, 12:45 UTCJul 26, 18:15 UTC5h 30m
2026-07-26 AAL3026 DFW → OAX Jul 26, 01:40 UTCJul 26, 04:55 UTC3h 15m
2026-07-25 AAL1202 BOS → AUS Jul 25, 21:50 UTCJul 26, 00:15 UTC2h 25m
2026-07-25 AAL1006 JFK → MIA Jul 25, 17:10 UTCJul 25, 19:35 UTC2h 25m
2026-07-25 AAL1603 EWR → DFW Jul 25, 15:40 UTCJul 25, 15:50 UTC10m
2026-07-25 AAL1603 EWR → DFW Jul 25, 13:35 UTCJul 25, 15:05 UTC1h 30m
2026-07-25 AAL412 BDL → MIA Jul 25, 09:10 UTCJul 25, 11:50 UTC2h 40m
2026-07-25 AAL1272 MIA → BDL Jul 25, 01:35 UTCJul 25, 04:15 UTC2h 40m
2026-07-25 AAL1272 MIA → BDL Jul 25, 01:31 UTCJul 25, 04:03 UTC2h 32m
2026-07-24 AAL1612 DCA → DFW Jul 24, 22:05 UTCJul 25, 00:15 UTC2h 10m
2026-07-24 AAL2837 DFW → SFO Jul 24, 17:35 UTCJul 24, 19:30 UTC1h 55m
2026-07-24 AAL2837 DFW → SFO Jul 24, 17:33 UTCJul 24, 19:26 UTC1h 53m
2026-07-24 AAL2852 DFW → MBJ Jul 24, 14:40 UTCJul 24, 16:25 UTC1h 45m
2026-07-24 AAL2745 MCO → DCA Jul 24, 11:10 UTCJul 24, 13:00 UTC1h 50m
2026-07-23 AAL2139 MCI → PHL Jul 23, 21:40 UTCJul 23, 23:25 UTC1h 45m
2026-07-23 AAL2139 MCI → PHL Jul 23, 21:36 UTCJul 23, 23:20 UTC1h 44m
2026-07-23 AAL1675 - Jul 23, 18:50 UTCJul 23, 20:15 UTC1h 25m
2026-07-23 AAL3022 MIA → LGA Jul 23, 14:50 UTCJul 23, 17:00 UTC2h 10m
2026-07-23 AAL3022 MIA → LGA Jul 23, 11:15 UTCJul 23, 13:00 UTC1h 45m
2026-07-22 AAL2537 SFO → ORD Jul 22, 23:40 UTCJul 23, 03:20 UTC3h 40m
2026-07-22 AAL3199 CLT → GSP Jul 22, 19:00 UTCJul 22, 20:30 UTC1h 30m
2026-07-21 AAL441 SRQ → ORD Jul 21, 21:35 UTCJul 22, 01:30 UTC3h 55m
2026-07-21 AAL550 JAX → PHL Jul 21, 15:50 UTCJul 21, 20:05 UTC4h 15m
2026-07-21 AAL1773 - Jul 21, 10:10 UTCJul 21, 13:25 UTC3h 15m
2026-07-21 AAL2518 ORD → JFK Jul 21, 01:30 UTCJul 21, 03:55 UTC2h 25m
2026-07-20 AAL454 XPL → MIA Jul 20, 21:34 UTCJul 20, 23:28 UTC1h 54m
2026-07-20 AAL313 - Jul 20, 18:25 UTCJul 20, 23:30 UTC5h 5m
2026-07-20 AAL3211 SAN → CLT Jul 20, 14:20 UTCJul 20, 16:50 UTC2h 30m
2026-07-20 AAL1083 PHX → AUS Jul 20, 11:00 UTCJul 20, 12:05 UTC1h 5m
2026-07-19 AAL2332 TPA → PHL Jul 19, 22:50 UTCJul 20, 02:50 UTC4h 0m
2026-07-19 AAL1831 - Jul 19, 20:05 UTCJul 19, 21:20 UTC1h 15m
2026-07-19 AAL1831 FAT → PHX Jul 19, 20:00 UTCJul 19, 21:24 UTC1h 24m
2026-07-19 AAL1831 - Jul 19, 17:35 UTCJul 19, 18:40 UTC1h 5m
2026-07-19 AAL1958 CMH → PHX Jul 19, 12:20 UTCJul 19, 15:45 UTC3h 25m
2026-07-19 AAL1958 CMH → PHX Jul 19, 12:20 UTCJul 19, 15:45 UTC3h 25m
2026-07-19 AAL9605 BOS → CMH Jul 19, 02:10 UTCJul 19, 03:55 UTC1h 45m
2026-07-18 AAL1611 - Jul 18, 22:05 UTCJul 19, 01:00 UTC2h 55m
2026-07-18 AAL1449 - Jul 18, 15:10 UTCJul 18, 16:45 UTC1h 35m
2026-07-18 AAL1449 BDL → CLT Jul 18, 15:06 UTCJul 18, 16:59 UTC1h 53m
2026-07-18 AAL1449 - Jul 18, 11:55 UTCJul 18, 13:20 UTC1h 25m
2026-07-18 AAL3168 - Jul 18, 09:20 UTCJul 18, 10:10 UTC50m
2026-07-18 AAL2674 - Jul 18, 03:25 UTCJul 18, 04:05 UTC40m
2026-07-18 AAL2917 - Jul 18, 00:25 UTCJul 18, 01:54 UTC1h 30m
2026-07-17 AAL2250 EWR → ORD Jul 17, 20:20 UTCJul 17, 22:49 UTC2h 30m
2026-07-17 AAL2250 PWK → EWR Jul 17, 16:29 UTCJul 17, 18:05 UTC1h 35m
2026-07-17 AAL2095 PHL → ORD Jul 17, 13:10 UTCJul 17, 14:50 UTC1h 40m
2026-07-17 AAL2095 PHL → ORD Jul 17, 13:06 UTCJul 17, 14:50 UTC1h 44m
2026-07-16 AAL1759 DEN → PHL Jul 16, 22:30 UTCJul 17, 01:35 UTC3h 5m
2026-07-16 AAL1759 PHL → DEN Jul 16, 15:55 UTCJul 16, 19:14 UTC3h 20m

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 N819NN page for operator, model, and routing details .

Mode-S AB2C04 frequently asked

What is Mode-S code AB2C04?
AB2C04 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N819NN.
Where is Mode-S AB2C04 registered?
Mode-S code AB2C04 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 AB2C04 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB2C04, octal 52626004, decimal 11,217,924.
What flights does AB2C04 operate?
Mode-S AB2C04 has broadcast 20 distinct callsigns, including AAL2922, AAL1998, AAL1936, AAL903, AAL3280.