Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB38A1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N822DN · BOEING 737-900 · operated by DELTA AIR LINES INC

Hex
AB38A1
Octal
52634241
Decimal
11,221,153
Country
US
Tail
N822DN
Type
B739
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
520
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S AB38A1.

Country allocation

The ICAO 24-bit address AB38A1 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
DAL2755 - 6 2026-06-26
DAL2287 Delta Air Lines 6 2026-05-31
DAL368 Delta Air Lines 5 2026-04-17
DAL3025 Delta Air Lines 5 2026-07-20
DAL2931 - 5 2026-07-05
DAL2593 Delta Air Lines 5 2026-05-25
DAL2280 Delta Air Lines 5 2026-05-29
DAL937 Delta Air Lines 4 2026-07-23
DAL3142 - 4 2026-07-13
DAL2951 - 4 2026-07-13
DAL2908 - 4 2026-06-15
DAL2747 - 4 2026-07-21
DAL2301 Delta Air Lines 4 2026-05-31
DAL2195 - 4 2026-07-03
DAL1551 Delta Air Lines 4 2026-05-05
DAL1538 - 4 2026-07-02
DAL1424 - 4 2026-07-12
DAL1224 Delta Air Lines 4 2026-04-26
DAL1129 - 4 2026-07-05
DAL823 - 3 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL564 JFK → SEA Jul 26, 20:05 UTCJul 26, 22:15 UTC2h 10m
2026-07-25 DAL357 BOS → ATL Jul 25, 23:55 UTCJul 26, 04:55 UTC5h 0m
2026-07-25 DAL2545 RDU → BOS Jul 25, 20:55 UTCJul 25, 22:10 UTC1h 15m
2026-07-25 DAL2545 RDU → BOS Jul 25, 20:55 UTCJul 25, 22:18 UTC1h 23m
2026-07-25 DAL2545 RDU → BOS Jul 25, 18:05 UTCJul 25, 19:20 UTC1h 15m
2026-07-25 DAL886 CVG → SEA Jul 25, 13:10 UTCJul 25, 16:35 UTC3h 25m
2026-07-25 DAL1251 ATL → TUS Jul 25, 03:25 UTCJul 25, 06:30 UTC3h 5m
2026-07-24 DAL924 LAS → BOS Jul 24, 23:40 UTCJul 25, 00:45 UTC1h 5m
2026-07-24 DAL1652 MIA → LGA Jul 24, 18:30 UTCJul 24, 20:30 UTC2h 0m
2026-07-24 DAL1652 MIA → LGA Jul 24, 18:27 UTCJul 24, 20:28 UTC2h 1m
2026-07-24 DAL772 BOS → BNA Jul 24, 13:10 UTCJul 24, 16:55 UTC3h 45m
2026-07-24 DAL656 ATL → BDA Jul 24, 03:10 UTCJul 24, 07:30 UTC4h 20m
2026-07-23 DAL937 MCI → BOS Jul 23, 21:00 UTCJul 24, 00:15 UTC3h 15m
2026-07-23 DAL937 MCI → BOS Jul 23, 16:10 UTCJul 23, 19:20 UTC3h 10m
2026-07-23 DAL1074 MSP → LGA Jul 23, 12:15 UTCJul 23, 14:40 UTC2h 25m
2026-07-23 DAL971 MSP → CMH Jul 23, 00:30 UTCJul 23, 03:00 UTC2h 30m
2026-07-22 DAL1353 JFK → MSP Jul 22, 21:05 UTCJul 22, 22:20 UTC1h 15m
2026-07-22 DAL1353 JFK → MSP Jul 22, 18:15 UTCJul 22, 19:30 UTC1h 15m
2026-07-22 DAL1178 BNA → BOS Jul 22, 15:15 UTCJul 22, 16:40 UTC1h 25m
2026-07-22 DAL1178 BNA → BOS Jul 22, 11:40 UTCJul 22, 13:25 UTC1h 45m
2026-07-22 DAL719 MSP → SFO Jul 22, 00:15 UTCJul 22, 00:45 UTC30m
2026-07-21 DAL719 MSP → SFO Jul 21, 21:45 UTCJul 21, 22:30 UTC45m
2026-07-21 DAL2747 - Jul 21, 18:25 UTCJul 21, 19:55 UTC1h 30m
2026-07-21 DAL2747 - Jul 21, 15:20 UTCJul 21, 17:00 UTC1h 40m
2026-07-21 DAL2299 - Jul 21, 12:15 UTCJul 21, 13:05 UTC50m
2026-07-21 DAL2624 ATL → SDF Jul 21, 03:10 UTCJul 21, 04:05 UTC55m
2026-07-21 DAL1660 - Jul 21, 00:00 UTCJul 21, 01:30 UTC1h 30m
2026-07-20 DAL1660 - Jul 20, 20:50 UTCJul 20, 22:25 UTC1h 35m
2026-07-20 DAL1965 - Jul 20, 17:30 UTCJul 20, 19:00 UTC1h 30m
2026-07-20 DAL1944 ATL → NAS Jul 20, 13:55 UTCJul 20, 15:15 UTC1h 20m
2026-07-20 DAL3105 IND → ATL Jul 20, 10:05 UTCJul 20, 11:10 UTC1h 5m
2026-07-20 DAL2657 ATL → IND Jul 20, 03:55 UTCJul 20, 05:00 UTC1h 5m
2026-07-20 DAL3025 ATL → LIT Jul 20, 01:00 UTCJul 20, 02:05 UTC1h 5m
2026-07-20 DAL3025 ATL → LIT Jul 20, 00:53 UTCJul 20, 02:02 UTC1h 9m
2026-07-19 DAL3025 ATL → LIT Jul 19, 22:35 UTCJul 19, 23:30 UTC55m
2026-07-19 DAL1273 - Jul 19, 19:55 UTCJul 19, 20:20 UTC25m
2026-07-19 DAL1273 - Jul 19, 17:30 UTCJul 19, 18:05 UTC35m
2026-07-19 DAL3165 - Jul 19, 15:10 UTCJul 19, 16:10 UTC1h 0m
2026-07-19 DAL1545 ATL → CMH Jul 19, 00:10 UTCJul 19, 01:25 UTC1h 15m
2026-07-18 DAL1992 ATL → GDL Jul 18, 14:20 UTCJul 18, 22:05 UTC7h 45m
2026-07-18 DAL3105 - Jul 18, 10:00 UTCJul 18, 11:05 UTC1h 5m
2026-07-17 DAL2979 JFK → ATL Jul 17, 21:55 UTCJul 17, 23:00 UTC1h 5m
2026-07-17 DAL2979 JFK → ATL Jul 17, 21:53 UTCJul 17, 23:05 UTC1h 12m
2026-07-17 DAL1004 ABQ → ATL Jul 17, 17:35 UTCJul 17, 20:25 UTC2h 50m
2026-07-17 DAL1004 ABQ → ATL Jul 17, 17:34 UTCJul 17, 20:31 UTC2h 57m
2026-07-17 DAL1004 ATL → ABQ Jul 17, 13:20 UTCJul 17, 15:55 UTC2h 35m
2026-07-17 DAL2407 - Jul 17, 10:15 UTCJul 17, 11:10 UTC55m
2026-07-17 DAL2624 ATL → SDF Jul 17, 03:59 UTCJul 17, 04:49 UTC50m
2026-07-17 DAL3115 - Jul 17, 00:20 UTCJul 17, 01:29 UTC1h 10m
2026-07-17 DAL3115 SRQ → ATL Jul 17, 00:19 UTCJul 17, 01:37 UTC1h 18m

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 N822DN page for operator, model, and routing details .

Mode-S AB38A1 frequently asked

What is Mode-S code AB38A1?
AB38A1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N822DN.
Where is Mode-S AB38A1 registered?
Mode-S code AB38A1 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 AB38A1 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 AB38A1, octal 52634241, decimal 11,221,153.
What flights does AB38A1 operate?
Mode-S AB38A1 has broadcast 20 distinct callsigns, including DAL2755, DAL2287, DAL368, DAL3025, DAL2931.