Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB1971

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N814NN · BOEING 737-800 · operated by AMERICAN AIRLINES INC

Hex
AB1971
Octal
52614561
Decimal
11,213,169
Country
US
Tail
N814NN
Type
B738
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
567
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S AB1971.

Country allocation

The ICAO 24-bit address AB1971 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
AAL1014 - 8 2026-07-14
AAL2822 American Airlines 5 2026-06-09
AAL2733 - 5 2026-07-06
AAL1028 American Airlines 5 2026-04-19
AAL393 American Airlines 4 2026-05-12
AAL3307 American Airlines 4 2026-06-14
AAL3278 American Airlines 4 2026-06-14
AAL3265 American Airlines 4 2026-07-23
AAL2770 American Airlines 4 2026-06-06
AAL2470 American Airlines 4 2026-04-16
AAL2360 American Airlines 4 2026-04-14
AAL2321 American Airlines 4 2026-07-25
AAL2225 American Airlines 4 2026-06-01
AAL1568 - 4 2026-06-30
AAL1390 American Airlines 4 2026-07-19
AAL1020 American Airlines 4 2026-05-25
AAL526 - 3 2026-06-27
AAL471 American Airlines 3 2026-07-23
AAL396 - 3 2026-06-29
AAL3280 - 3 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL606 DFW → JFK Jul 26, 21:55 UTCJul 26, 22:15 UTC20m
2026-07-26 AAL481 LAX → PHL Jul 26, 16:55 UTCJul 26, 20:05 UTC3h 10m
2026-07-26 AAL2234 JFK → DFW Jul 26, 12:35 UTCJul 26, 15:40 UTC3h 5m
2026-07-26 AAL832 DCA → BOS Jul 26, 00:15 UTCJul 26, 04:50 UTC4h 35m
2026-07-25 AAL2829 JFK → PHX Jul 25, 17:20 UTCJul 25, 22:40 UTC5h 20m
2026-07-25 AAL1051 CMH → CLT Jul 25, 13:00 UTCJul 25, 15:30 UTC2h 30m
2026-07-25 AAL1051 CMH → CLT Jul 25, 12:59 UTCJul 25, 15:27 UTC2h 28m
2026-07-25 AAL2321 PHL → LAX Jul 25, 01:15 UTCJul 25, 02:50 UTC1h 35m
2026-07-24 AAL3030 MCI → DFW Jul 24, 21:25 UTCJul 24, 22:40 UTC1h 15m
2026-07-24 AAL3030 MCI → DFW Jul 24, 21:22 UTCJul 24, 22:37 UTC1h 15m
2026-07-24 AAL1743 PWM → DCA Jul 24, 18:00 UTCJul 24, 19:35 UTC1h 35m
2026-07-24 AAL2095 PHL → ORD Jul 24, 14:25 UTCJul 24, 16:05 UTC1h 40m
2026-07-24 AAL3061 MIA → PHL Jul 24, 00:15 UTCJul 24, 02:35 UTC2h 20m
2026-07-24 AAL3061 MIA → PHL Jul 24, 00:14 UTCJul 24, 02:34 UTC2h 20m
2026-07-23 AAL3265 BDL → DFW Jul 23, 18:45 UTCJul 23, 21:20 UTC2h 35m
2026-07-23 AAL3265 BDL → DFW Jul 23, 18:40 UTCJul 23, 21:31 UTC2h 51m
2026-07-23 AAL471 CLT → BOS Jul 23, 15:25 UTCJul 23, 16:50 UTC1h 25m
2026-07-22 AAL462 PHX → ATL Jul 22, 11:10 UTCJul 22, 13:10 UTC2h 0m
2026-07-21 AAL3256 IND → MIA Jul 21, 14:50 UTCJul 21, 17:20 UTC2h 30m
2026-07-21 AAL3256 IND → MIA Jul 21, 14:47 UTCJul 21, 17:15 UTC2h 28m
2026-07-21 AAL2321 - Jul 21, 01:05 UTCJul 21, 02:35 UTC1h 30m
2026-07-20 AAL1320 DEN → DFW Jul 20, 22:15 UTCJul 20, 23:35 UTC1h 20m
2026-07-20 AAL3088 DFW → LGA Jul 20, 15:45 UTCJul 20, 18:50 UTC3h 5m
2026-07-20 AAL3088 DFW → LGA Jul 20, 15:42 UTCJul 20, 18:42 UTC3h 0m
2026-07-20 AAL475 LAX → ORD Jul 20, 10:55 UTCJul 20, 13:45 UTC2h 50m
2026-07-20 AAL1203 BOS → DFW Jul 20, 01:40 UTCJul 20, 05:02 UTC3h 22m
2026-07-20 AAL1203 BOS → DFW Jul 20, 01:40 UTCJul 20, 05:05 UTC3h 25m
2026-07-19 AAL1796 EWR → DFW Jul 19, 21:10 UTCJul 19, 22:50 UTC1h 40m
2026-07-19 AAL1796 EWR → DFW Jul 19, 17:50 UTCJul 19, 19:35 UTC1h 45m
2026-07-19 AAL1390 DFW → FLL Jul 19, 14:40 UTCJul 19, 15:45 UTC1h 5m
2026-07-19 AAL2180 RDU → LGA Jul 19, 12:05 UTCJul 19, 13:30 UTC1h 25m
2026-07-19 AAL2632 EWR → ORD Jul 19, 09:10 UTCJul 19, 10:10 UTC1h 0m
2026-07-19 AAL560 DFW → CLE Jul 19, 00:15 UTCJul 19, 02:30 UTC2h 15m
2026-07-18 AAL9603 - Jul 18, 19:50 UTCJul 18, 22:35 UTC2h 45m
2026-07-18 AAL9602 - Jul 18, 16:20 UTCJul 18, 17:50 UTC1h 30m
2026-07-17 AAL1005 - Jul 17, 20:04 UTCJul 17, 21:50 UTC1h 45m
2026-07-17 AAL1279 CMH → DFW Jul 17, 16:10 UTCJul 17, 18:15 UTC2h 5m
2026-07-17 AAL1279 DFW → CMH Jul 17, 13:00 UTCJul 17, 15:00 UTC2h 0m
2026-07-17 AAL2551 - Jul 17, 10:15 UTCJul 17, 10:55 UTC40m
2026-07-17 AAL1914 - Jul 17, 06:15 UTCJul 17, 06:50 UTC35m
2026-07-17 AAL1728 - Jul 17, 02:59 UTCJul 17, 04:49 UTC1h 50m
2026-07-16 AAL1728 DFW → CVG Jul 16, 23:59 UTCJul 17, 01:49 UTC1h 50m
2026-07-16 AAL1520 BNA → DFW Jul 16, 19:45 UTCJul 16, 21:25 UTC1h 40m
2026-07-16 AAL1520 DFW → BNA Jul 16, 16:49 UTCJul 16, 18:15 UTC1h 25m
2026-07-16 AAL1561 - Jul 16, 13:20 UTCJul 16, 15:25 UTC2h 5m
2026-07-16 AAL9786 - Jul 16, 11:50 UTCJul 16, 12:20 UTC30m
2026-07-16 AAL2057 LGA → ORD Jul 16, 02:00 UTCJul 16, 04:00 UTC2h 0m
2026-07-15 AAL610 DFW → LGA Jul 15, 20:45 UTCJul 15, 23:55 UTC3h 10m
2026-07-15 AAL1680 - Jul 15, 16:10 UTCJul 15, 18:25 UTC2h 15m
2026-07-15 AAL1680 DFW → CLE Jul 15, 12:30 UTCJul 15, 14:50 UTC2h 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 N814NN page for operator, model, and routing details .

Mode-S AB1971 frequently asked

What is Mode-S code AB1971?
AB1971 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N814NN.
Where is Mode-S AB1971 registered?
Mode-S code AB1971 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 AB1971 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB1971, octal 52614561, decimal 11,213,169.
What flights does AB1971 operate?
Mode-S AB1971 has broadcast 20 distinct callsigns, including AAL1014, AAL2822, AAL2733, AAL1028, AAL393.