Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB400F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N824DN · BOEING 737-900 · operated by WELLS FARGO TRUST CO NA TRUSTEE

Hex
AB400F
Octal
52640017
Decimal
11,223,055
Country
US
Tail
N824DN
Type
B739
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
447
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S AB400F.

Country allocation

The ICAO 24-bit address AB400F 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
DAL1380 Delta Air Lines 7 2026-07-26
DAL904 - 5 2026-07-23
DAL2925 - 5 2026-07-12
DAL2070 Delta Air Lines 5 2026-04-16
DAL1734 - 5 2026-07-17
DAL1443 - 5 2026-07-10
DAL1067 Delta Air Lines 5 2026-05-04
DAL787 Delta Air Lines 4 2026-07-24
DAL769 - 4 2026-06-27
DAL3055 - 4 2026-07-10
DAL2714 Delta Air Lines 4 2026-07-18
DAL2437 - 4 2026-06-14
DAL2427 - 4 2026-07-08
DAL2083 - 4 2026-07-18
DAL1757 Delta Air Lines 4 2026-07-25
DAL1477 Delta Air Lines 4 2026-07-26
DAL1445 - 4 2026-07-24
DAL1251 - 4 2026-07-02
DAL1151 Delta Air Lines 4 2026-05-01
DAL1002 - 4 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1477 ORD → ATL Jul 26, 20:55 UTCJul 26, 21:45 UTC50m
2026-07-26 DAL1477 ORD → ATL Jul 26, 17:30 UTCJul 26, 19:10 UTC1h 40m
2026-07-26 DAL1380 BOS → LGA Jul 26, 14:25 UTCJul 26, 15:30 UTC1h 5m
2026-07-26 DAL1380 BOS → LGA Jul 26, 11:40 UTCJul 26, 13:00 UTC1h 20m
2026-07-25 DAL1757 SLC → SJD Jul 25, 19:25 UTCJul 25, 20:20 UTC55m
2026-07-25 DAL1757 SLC → SJD Jul 25, 17:05 UTCJul 25, 17:20 UTC15m
2026-07-25 DAL1757 SLC → SJD Jul 25, 15:25 UTCJul 25, 15:50 UTC25m
2026-07-25 DAL1757 SLC → SJD Jul 25, 12:30 UTCJul 25, 13:40 UTC1h 10m
2026-07-24 DAL787 ATL → BOS Jul 24, 20:40 UTCJul 25, 00:30 UTC3h 50m
2026-07-24 DAL787 ATL → BOS Jul 24, 14:45 UTCJul 24, 19:05 UTC4h 20m
2026-07-24 DAL1445 - Jul 24, 11:15 UTCJul 24, 12:35 UTC1h 20m
2026-07-24 DAL1057 JFK → LAX Jul 24, 01:50 UTCJul 24, 02:55 UTC1h 5m
2026-07-23 DAL904 BOS → LAX Jul 23, 19:30 UTCJul 23, 23:45 UTC4h 15m
2026-07-23 DAL904 BOS → LAX Jul 23, 19:30 UTCJul 23, 23:46 UTC4h 16m
2026-07-23 DAL904 ATL → SMF Jul 23, 13:35 UTCJul 23, 17:45 UTC4h 10m
2026-07-23 DAL1364 MIA → MCO Jul 23, 10:40 UTCJul 23, 11:55 UTC1h 15m
2026-07-23 DAL1364 MIA → MCO Jul 23, 10:37 UTCJul 23, 11:55 UTC1h 18m
2026-07-23 DAL2984 ATL → ORF Jul 23, 00:20 UTCJul 23, 01:35 UTC1h 15m
2026-07-22 DAL1800 MBJ → ATL Jul 22, 15:30 UTCJul 22, 21:55 UTC6h 25m
2026-07-22 DAL1247 HPN → ATL Jul 22, 11:50 UTCJul 22, 13:10 UTC1h 20m
2026-07-22 DAL2486 BOS → LAS Jul 22, 00:50 UTCJul 22, 02:35 UTC1h 45m
2026-07-21 DAL3169 - Jul 21, 21:10 UTCJul 21, 22:20 UTC1h 10m
2026-07-21 DAL3169 ATL → CVG Jul 21, 18:05 UTCJul 21, 19:40 UTC1h 35m
2026-07-21 DAL932 JFK → ATL Jul 21, 15:48 UTCJul 21, 16:32 UTC44m
2026-07-21 DAL3054 CHS → ATL Jul 21, 13:35 UTCJul 21, 14:10 UTC35m
2026-07-20 DAL809 SJC → ATL Jul 20, 21:00 UTCJul 21, 01:20 UTC4h 20m
2026-07-20 DAL809 SJC → ATL Jul 20, 15:30 UTCJul 20, 19:30 UTC4h 0m
2026-07-20 DAL2161 TPA → JFK Jul 20, 12:30 UTCJul 20, 13:55 UTC1h 25m
2026-07-20 DAL2210 LGA → IAH Jul 20, 01:30 UTCJul 20, 03:00 UTC1h 30m
2026-07-19 DAL1928 MBJ → ATL Jul 19, 21:30 UTCJul 19, 23:05 UTC1h 35m
2026-07-19 DAL1997 - Jul 19, 16:25 UTCJul 19, 18:00 UTC1h 35m
2026-07-19 DAL1997 ATL → MBJ Jul 19, 16:25 UTCJul 19, 18:50 UTC2h 25m
2026-07-19 DAL3058 - Jul 19, 11:35 UTCJul 19, 12:30 UTC55m
2026-07-18 DAL1235 ATL → LEX Jul 18, 22:00 UTCJul 18, 22:50 UTC50m
2026-07-18 DAL1965 - Jul 18, 17:35 UTCJul 18, 19:05 UTC1h 30m
2026-07-18 DAL1944 ATL → NAS Jul 18, 14:05 UTCJul 18, 15:30 UTC1h 25m
2026-07-18 DAL1944 ATL → NAS Jul 18, 14:03 UTCJul 18, 15:49 UTC1h 46m
2026-07-18 DAL1565 - Jul 18, 10:35 UTCJul 18, 11:40 UTC1h 5m
2026-07-18 DAL2083 - Jul 18, 03:35 UTCJul 18, 04:35 UTC1h 0m
2026-07-18 DAL2714 BUF → BOS Jul 18, 00:25 UTCJul 18, 02:00 UTC1h 35m
2026-07-18 DAL2714 BUF → BOS Jul 18, 00:22 UTCJul 18, 01:55 UTC1h 33m
2026-07-17 DAL1734 ATL → YYZ Jul 17, 20:10 UTCJul 17, 22:10 UTC2h 0m
2026-07-17 DAL570 SFO → ATL Jul 17, 13:25 UTCJul 17, 17:44 UTC4h 20m
2026-07-17 DAL656 ATL → SFO Jul 17, 03:25 UTCJul 17, 07:35 UTC4h 10m
2026-07-16 DAL787 GEG → ATL Jul 16, 20:05 UTCJul 17, 00:04 UTC4h 0m
2026-07-16 DAL787 ATL → GEG Jul 16, 14:15 UTCJul 16, 18:15 UTC4h 0m
2026-07-16 DAL2838 - Jul 16, 11:25 UTCJul 16, 12:44 UTC1h 20m
2026-07-16 DAL2838 CLE → ATL Jul 16, 11:21 UTCJul 16, 12:35 UTC1h 14m
2026-07-15 DAL1350 ATL → CLE Jul 15, 21:00 UTCJul 15, 22:15 UTC1h 15m
2026-07-15 DAL2978 CLE → ATL Jul 15, 16:55 UTCJul 15, 18:15 UTC1h 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 N824DN page for operator, model, and routing details .

Mode-S AB400F frequently asked

What is Mode-S code AB400F?
AB400F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N824DN.
Where is Mode-S AB400F registered?
Mode-S code AB400F 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 AB400F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB400F, octal 52640017, decimal 11,223,055.
What flights does AB400F operate?
Mode-S AB400F has broadcast 20 distinct callsigns, including DAL1380, DAL904, DAL2925, DAL2070, DAL1734.