Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD99FC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N976AN · BOEING 737-800 · operated by UMB BANK N A TRUSTEE

Hex
AD99FC
Octal
53314774
Decimal
11,377,148
Country
US
Tail
N976AN
Type
B738
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
578
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S AD99FC.

Country allocation

The ICAO 24-bit address AD99FC 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
AAL1573 - 7 2026-06-15
AAL2217 - 6 2026-07-08
AAL3097 - 5 2026-06-27
AAL2851 American Airlines 5 2026-04-20
AAL2512 American Airlines 5 2026-07-02
AAL1906 - 5 2026-06-20
AAL3048 American Airlines 4 2026-05-16
AAL3020 - 4 2026-07-05
AAL2413 American Airlines 4 2026-04-17
AAL2353 - 4 2026-06-18
AAL2286 American Airlines 4 2026-05-14
AAL2200 - 4 2026-06-15
AAL2146 American Airlines 4 2026-04-16
AAL1931 - 4 2026-07-01
AAL1656 - 4 2026-06-26
AAL1364 American Airlines 4 2026-05-28
AAL1245 - 4 2026-07-04
AAL999 - 3 2026-07-02
AAL985 American Airlines 3 2026-04-29
AAL883 American Airlines 3 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1437 MIA → LGA Jul 26, 22:40 UTCJul 26, 23:00 UTC20m
2026-07-26 AAL1360 DCA → DFW Jul 26, 18:55 UTCJul 26, 20:50 UTC1h 55m
2026-07-26 AAL1669 MSY → DCA Jul 26, 02:45 UTCJul 26, 05:25 UTC2h 40m
2026-07-26 AAL1669 MSY → DCA Jul 26, 02:36 UTCJul 26, 05:23 UTC2h 47m
2026-07-26 AAL2039 ORD → SFO Jul 26, 00:30 UTCJul 26, 01:15 UTC45m
2026-07-25 AAL2039 ORD → SFO Jul 25, 22:15 UTCJul 25, 23:00 UTC45m
2026-07-25 AAL2718 CLT → EWR Jul 25, 17:20 UTCJul 25, 21:00 UTC3h 40m
2026-07-25 AAL2718 CLT → EWR Jul 25, 17:18 UTCJul 25, 20:56 UTC3h 38m
2026-07-25 AAL1038 CLE → CLT Jul 25, 14:10 UTCJul 25, 15:35 UTC1h 25m
2026-07-25 AAL2966 PHL → CLT Jul 25, 10:20 UTCJul 25, 12:15 UTC1h 55m
2026-07-25 AAL2120 DCA → BOS Jul 25, 01:55 UTCJul 25, 03:35 UTC1h 40m
2026-07-24 AAL1683 PHL → IND Jul 24, 22:50 UTCJul 25, 00:10 UTC1h 20m
2026-07-24 AAL1683 PHL → IND Jul 24, 22:48 UTCJul 25, 00:09 UTC1h 21m
2026-07-24 AAL2523 BOS → DCA Jul 24, 17:50 UTCJul 24, 21:05 UTC3h 15m
2026-07-24 AAL2523 BOS → DCA Jul 24, 12:01 UTCJul 24, 16:03 UTC4h 2m
2026-07-24 AAL2523 BOS → DCA Jul 24, 12:05 UTCJul 24, 16:00 UTC3h 55m
2026-07-23 AAL2537 RIC → CLT Jul 23, 23:30 UTCJul 24, 03:00 UTC3h 30m
2026-07-23 AAL2537 RIC → CLT Jul 23, 23:25 UTCJul 24, 03:03 UTC3h 38m
2026-07-23 AAL3199 CLT → GSP Jul 23, 19:15 UTCJul 23, 20:50 UTC1h 35m
2026-07-23 AAL1194 ORD → BOS Jul 23, 17:10 UTCJul 23, 18:00 UTC50m
2026-07-23 AAL1238 EWR → DFW Jul 23, 03:40 UTCJul 23, 04:25 UTC45m
2026-07-23 AAL3186 SLC → PHX Jul 23, 00:50 UTCJul 23, 01:35 UTC45m
2026-07-22 AAL2877 NAS → ORD Jul 22, 20:01 UTCJul 22, 23:25 UTC3h 24m
2026-07-22 AAL2877 NAS → ORD Jul 22, 20:05 UTCJul 22, 23:30 UTC3h 25m
2026-07-22 AAL1261 PHL → BNA Jul 22, 14:45 UTCJul 22, 18:10 UTC3h 25m
2026-07-21 AAL1160 CLT → PHL Jul 21, 21:45 UTCJul 22, 01:25 UTC3h 40m
2026-07-21 AAL1160 CLT → PHL Jul 21, 21:42 UTCJul 22, 01:24 UTC3h 42m
2026-07-21 AAL2095 PHL → ORD Jul 21, 13:15 UTCJul 21, 15:15 UTC2h 0m
2026-07-21 AAL2095 PHL → ORD Jul 21, 13:13 UTCJul 21, 15:12 UTC1h 59m
2026-07-21 AAL490 PHL → ORD Jul 21, 03:15 UTCJul 21, 04:40 UTC1h 25m
2026-07-21 AAL490 PHL → ORD Jul 21, 03:11 UTCJul 21, 04:38 UTC1h 27m
2026-07-20 AAL3056 ORD → MIA Jul 20, 22:15 UTCJul 21, 01:00 UTC2h 44m
2026-07-20 AAL3056 ORD → MIA Jul 20, 22:14 UTCJul 21, 00:59 UTC2h 45m
2026-07-20 AAL2981 CLT → LAS Jul 20, 16:45 UTCJul 20, 19:15 UTC2h 30m
2026-07-20 AAL2981 CLT → LAS Jul 20, 16:45 UTCJul 20, 19:14 UTC2h 29m
2026-07-20 AAL1820 DFW → ONT Jul 20, 12:13 UTCJul 20, 15:15 UTC3h 2m
2026-07-20 AAL1820 DFW → ONT Jul 20, 12:15 UTCJul 20, 15:20 UTC3h 5m
2026-07-20 AAL1904 CLT → RDU Jul 20, 00:40 UTCJul 20, 03:05 UTC2h 25m
2026-07-19 AAL1904 CLT → RDU Jul 19, 20:25 UTCJul 19, 23:25 UTC3h 0m
2026-07-19 AAL2135 PWM → PHL Jul 19, 17:15 UTCJul 19, 19:10 UTC1h 55m
2026-07-19 AAL2135 PWM → PHL Jul 19, 14:10 UTCJul 19, 16:05 UTC1h 55m
2026-07-19 AAL2770 ATL → DFW Jul 19, 10:32 UTCJul 19, 12:09 UTC1h 37m
2026-07-19 AAL2770 ATL → DFW Jul 19, 10:35 UTCJul 19, 12:15 UTC1h 40m
2026-07-19 AAL2749 DFW → ATL Jul 19, 03:05 UTCJul 19, 04:46 UTC1h 41m
2026-07-19 AAL2749 DFW → ATL Jul 19, 03:05 UTCJul 19, 04:50 UTC1h 45m
2026-07-18 AAL1617 BUR → DFW Jul 18, 22:25 UTCJul 19, 01:20 UTC2h 55m
2026-07-18 AAL1617 DFW → BUR Jul 18, 16:40 UTCJul 18, 19:20 UTC2h 40m
2026-07-18 AAL3291 - Jul 18, 12:25 UTCJul 18, 14:40 UTC2h 15m
2026-07-18 AAL1316 - Jul 18, 02:40 UTCJul 18, 04:50 UTC2h 11m
2026-07-17 AAL310 - Jul 17, 23:05 UTCJul 18, 01:10 UTC2h 5m

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 N976AN page for operator, model, and routing details .

Mode-S AD99FC frequently asked

What is Mode-S code AD99FC?
AD99FC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N976AN.
Where is Mode-S AD99FC registered?
Mode-S code AD99FC 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 AD99FC broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD99FC, octal 53314774, decimal 11,377,148.
What flights does AD99FC operate?
Mode-S AD99FC has broadcast 20 distinct callsigns, including AAL1573, AAL2217, AAL3097, AAL2851, AAL2512.