Apparatus

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sensors Mode-S transponder

AB398A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N822NW · AIRBUS A-330-300 · operated by DELTA AIR LINES INC

Hex
AB398A
Octal
52634612
Decimal
11,221,386
Country
US
Tail
N822NW
Type
A333
No current signal · last broadcast Jul 26, 18:50 UTC
Flights observed
330
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 18:50 UTC

Last known position

Most recent position reported by Mode-S AB398A.

Country allocation

The ICAO 24-bit address AB398A 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
DAL194 - 11 2026-06-27
DAL73 Delta Air Lines 10 2026-07-20
DAL47 - 10 2026-07-08
DAL313 - 10 2026-06-18
DAL104 - 10 2026-06-17
DAL74 Delta Air Lines 9 2026-05-30
DAL312 Delta Air Lines 8 2026-06-09
DAL277 - 8 2026-07-04
DAL195 - 8 2026-07-01
DAL126 - 8 2026-07-15
DAL837 Delta Air Lines 7 2026-07-26
DAL182 - 7 2026-07-16
DAL134 - 7 2026-07-05
DAL129 - 7 2026-07-16
DAL112 - 7 2026-07-04
DAL84 Delta Air Lines 6 2026-07-25
DAL309 Delta Air Lines 6 2026-06-10
DAL183 Delta Air Lines 6 2026-07-17
DAL150 - 6 2026-06-15
DAL128 - 6 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL837 ATL → HNL Jul 26, 14:50 UTCJul 26, 18:50 UTC4h 0m
2026-07-25 DAL85 CDG → ATL Jul 25, 14:15 UTCJul 25, 22:55 UTC8h 40m
2026-07-25 DAL84 ATL → CDG Jul 25, 02:25 UTCJul 25, 04:30 UTC2h 5m
2026-07-25 DAL84 ATL → CDG Jul 25, 02:20 UTCJul 25, 10:12 UTC7h 52m
2026-07-24 DAL177 DUB → ATL Jul 24, 10:20 UTCJul 24, 18:15 UTC7h 55m
2026-07-24 DAL176 ATL → DUB Jul 24, 00:45 UTCJul 24, 07:40 UTC6h 55m
2026-07-23 DAL177 DUB → ATL Jul 23, 10:15 UTCJul 23, 11:05 UTC50m
2026-07-23 DAL177 DUB → ATL Jul 23, 10:14 UTCJul 23, 18:15 UTC8h 1m
2026-07-23 DAL177 DUB → ATL Jul 23, 10:14 UTCJul 23, 18:19 UTC8h 5m
2026-07-23 DAL176 ATL → DUB Jul 23, 00:22 UTCJul 23, 07:27 UTC7h 5m
2026-07-23 DAL176 ATL → DUB Jul 23, 00:25 UTCJul 23, 03:25 UTC3h 0m
2026-07-22 DAL175 MXP → ATL Jul 22, 11:10 UTCJul 22, 20:20 UTC9h 10m
2026-07-21 DAL174 ATL → MXP Jul 21, 23:15 UTCJul 22, 02:05 UTC2h 50m
2026-07-21 DAL175 MXP → ATL Jul 21, 10:40 UTCJul 21, 20:20 UTC9h 40m
2026-07-21 DAL175 MXP → ATL Jul 21, 10:40 UTCJul 21, 20:30 UTC9h 50m
2026-07-20 DAL174 ATL → MXP Jul 20, 22:45 UTCJul 21, 07:35 UTC8h 49m
2026-07-20 DAL73 AMS → ATL Jul 20, 09:10 UTCJul 20, 17:45 UTC8h 35m
2026-07-19 DAL46 JFK → AMS Jul 19, 23:00 UTCJul 20, 05:30 UTC6h 30m
2026-07-18 DAL991 LAX → JFK Jul 18, 22:35 UTCJul 19, 03:25 UTC4h 50m
2026-07-18 DAL991 LAX → JFK Jul 18, 22:31 UTCJul 19, 03:24 UTC4h 53m
2026-07-17 DAL353 - Jul 17, 23:45 UTCJul 18, 03:25 UTC3h 41m
2026-07-17 DAL353 - Jul 17, 22:15 UTCJul 17, 23:39 UTC1h 25m
2026-07-17 DAL183 FCO → JFK Jul 17, 09:04 UTCJul 17, 17:44 UTC8h 40m
2026-07-16 DAL182 JFK → FCO Jul 16, 23:02 UTCJul 17, 06:35 UTC7h 33m
2026-07-16 DAL182 JFK → FCO Jul 16, 23:05 UTCJul 17, 06:40 UTC7h 35m
2026-07-16 DAL129 BCN → JFK Jul 16, 11:44 UTCJul 16, 19:48 UTC8h 4m
2026-07-16 DAL129 BCN → JFK Jul 16, 11:45 UTCJul 16, 19:50 UTC8h 5m
2026-07-16 DAL128 JFK → BCN Jul 16, 01:55 UTCJul 16, 09:05 UTC7h 10m
2026-07-15 DAL127 - Jul 15, 11:10 UTCJul 15, 18:45 UTC7h 35m
2026-07-15 DAL126 - Jul 15, 00:55 UTCJul 15, 07:40 UTC6h 45m
2026-07-15 DAL126 JFK → MAD Jul 15, 00:51 UTCJul 15, 07:29 UTC6h 38m
2026-07-14 DAL127 - Jul 14, 11:15 UTCJul 14, 19:05 UTC7h 50m
2026-07-14 DAL127 MAD → JFK Jul 14, 11:13 UTCJul 14, 18:57 UTC7h 44m
2026-07-14 DAL126 JFK → MAD Jul 14, 00:55 UTCJul 14, 07:38 UTC6h 43m
2026-07-14 DAL126 - Jul 14, 00:55 UTCJul 14, 02:30 UTC1h 35m
2026-07-13 DAL231 - Jul 13, 10:55 UTCJul 13, 19:30 UTC8h 35m
2026-07-12 DAL230 - Jul 12, 23:50 UTCJul 13, 07:40 UTC7h 50m
2026-07-12 DAL230 JFK → FCO Jul 12, 23:47 UTCJul 13, 07:39 UTC7h 52m
2026-07-12 DAL157 - Jul 12, 11:55 UTCJul 12, 19:50 UTC7h 55m
2026-07-12 DAL157 - Jul 12, 04:15 UTCJul 12, 19:50 UTC15h 35m
2026-07-11 DAL157 - Jul 11, 22:35 UTCJul 12, 19:50 UTC21h 15m
2026-07-11 DAL156 JFK → ACC Jul 11, 21:45 UTCJul 12, 07:25 UTC9h 40m
2026-07-11 DAL156 - Jul 11, 21:45 UTCJul 12, 05:15 UTC7h 30m
2026-07-11 DAL273 LIS → JFK Jul 11, 09:30 UTCJul 11, 16:35 UTC7h 5m
2026-07-11 DAL273 LIS → JFK Jul 11, 09:29 UTCJul 11, 16:40 UTC7h 11m
2026-07-11 DAL272 JFK → LIS Jul 11, 00:50 UTCJul 11, 06:55 UTC6h 5m
2026-07-10 DAL958 - Jul 10, 02:00 UTCJul 10, 02:05 UTC5m
2026-07-10 DAL958 - Jul 10, 00:35 UTCJul 10, 01:55 UTC1h 20m
2026-07-10 DAL958 CLE → JFK Jul 10, 00:30 UTCJul 10, 02:04 UTC1h 34m
2026-07-09 DAL958 LAX → CLE Jul 9, 15:40 UTCJul 9, 21:05 UTC5h 25m

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 N822NW page for operator, model, and routing details .

Mode-S AB398A frequently asked

What is Mode-S code AB398A?
AB398A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N822NW.
Where is Mode-S AB398A registered?
Mode-S code AB398A 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 AB398A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB398A, octal 52634612, decimal 11,221,386.
What flights does AB398A operate?
Mode-S AB398A has broadcast 20 distinct callsigns, including DAL194, DAL73, DAL47, DAL313, DAL104.