Apparatus

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sensors Mode-S transponder

AB44AF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N825NW · AIRBUS A-330-300 · operated by DELTA AIR LINES INC

Hex
AB44AF
Octal
52642257
Decimal
11,224,239
Country
US
Tail
N825NW
Type
A333
Broadcasting now · callsign DAL135 · 38,000 ft
Flights observed
267
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Current position

AB44AF is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AB44AF 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
DAL185 - 14 2026-07-08
DAL184 - 12 2026-07-08
DAL73 - 11 2026-07-13
DAL46 - 11 2026-07-09
DAL135 - 11 2026-07-14
DAL126 - 10 2026-07-06
DAL183 Delta Air Lines 9 2026-06-02
DAL134 - 9 2026-07-13
DAL231 Delta Air Lines 8 2026-06-27
DAL194 Delta Air Lines 8 2026-05-04
DAL127 Delta Air Lines 8 2026-07-06
DAL72 - 7 2026-07-13
DAL75 Delta Air Lines 6 2026-06-09
DAL48 Delta Air Lines 6 2026-06-05
DAL206 - 6 2026-06-20
DAL972 Delta Air Lines 5 2026-05-31
DAL237 Delta Air Lines 5 2026-06-05
DAL230 - 5 2026-06-27
DAL228 Delta Air Lines 5 2026-06-17
DAL182 Delta Air Lines 5 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL135 - Jul 14, 09:30 UTCJul 14, 11:00 UTC1h 30m
2026-07-13 DAL72 ATL → AMS Jul 13, 22:25 UTCJul 14, 06:45 UTC8h 20m
2026-07-13 DAL73 - Jul 13, 19:05 UTCJul 13, 19:20 UTC15m
2026-07-13 DAL73 AMS → ATL Jul 13, 09:50 UTCJul 13, 18:48 UTC8h 58m
2026-07-13 DAL73 - Jul 13, 09:50 UTCJul 13, 11:25 UTC1h 35m
2026-07-13 DAL134 - Jul 13, 04:50 UTCJul 13, 06:35 UTC1h 45m
2026-07-12 DAL134 - Jul 12, 23:10 UTCJul 13, 01:20 UTC2h 10m
2026-07-12 DAL23 MUC → DTW Jul 12, 07:10 UTCJul 12, 15:55 UTC8h 45m
2026-07-11 DAL22 - Jul 11, 21:00 UTCJul 12, 05:05 UTC8h 5m
2026-07-11 DAL23 MUC → DTW Jul 11, 07:40 UTCJul 11, 16:30 UTC8h 50m
2026-07-10 DAL22 - Jul 10, 21:05 UTCJul 11, 03:45 UTC6h 40m
2026-07-10 DAL22 DTW → MUC Jul 10, 21:04 UTCJul 11, 05:00 UTC7h 56m
2026-07-10 DAL135 - Jul 10, 09:20 UTCJul 10, 11:00 UTC1h 40m
2026-07-10 DAL135 AMS → DTW Jul 10, 09:18 UTCJul 10, 17:30 UTC8h 12m
2026-07-09 DAL134 - Jul 9, 22:50 UTCJul 10, 06:00 UTC7h 10m
2026-07-09 DAL135 - Jul 9, 10:15 UTCJul 9, 18:30 UTC8h 15m
2026-07-09 DAL46 JFK → AMS Jul 9, 00:29 UTCJul 9, 07:16 UTC6h 47m
2026-07-09 DAL46 JFK → AMS Jul 9, 00:30 UTCJul 9, 07:20 UTC6h 50m
2026-07-08 DAL185 MXP → JFK Jul 8, 12:46 UTCJul 8, 20:46 UTC8h 0m
2026-07-08 DAL185 MXP → JFK Jul 8, 12:50 UTCJul 8, 20:55 UTC8h 5m
2026-07-08 DAL184 JFK → MXP Jul 8, 02:15 UTCJul 8, 09:40 UTC7h 25m
2026-07-08 DAL184 JFK → MXP Jul 8, 02:11 UTCJul 8, 09:53 UTC7h 42m
2026-07-07 DAL185 MXP → JFK Jul 7, 14:25 UTCJul 7, 22:40 UTC8h 15m
2026-07-07 DAL184 JFK → MXP Jul 7, 03:50 UTCJul 7, 11:15 UTC7h 25m
2026-07-06 DAL127 MAD → JFK Jul 6, 11:40 UTCJul 6, 19:50 UTC8h 10m
2026-07-06 DAL126 JFK → MAD Jul 6, 02:19 UTCJul 6, 08:49 UTC6h 30m
2026-07-06 DAL126 - Jul 6, 02:20 UTCJul 6, 03:45 UTC1h 25m
2026-07-05 DAL127 MAD → JFK Jul 5, 11:30 UTCJul 5, 19:00 UTC7h 30m
2026-07-05 DAL126 - Jul 5, 00:40 UTCJul 5, 07:30 UTC6h 50m
2026-07-04 DAL157 - Jul 4, 11:55 UTCJul 4, 19:45 UTC7h 50m
2026-07-04 DAL157 - Jul 4, 04:15 UTCJul 4, 20:05 UTC15h 50m
2026-07-03 DAL157 - Jul 3, 21:50 UTCJul 4, 20:05 UTC22h 15m
2026-07-03 DAL156 JFK → ACC Jul 3, 21:42 UTCJul 4, 07:31 UTC9h 49m
2026-07-02 DAL185 MXP → JFK Jul 2, 13:35 UTCJul 2, 22:20 UTC8h 45m
2026-07-02 DAL184 JFK → MXP Jul 2, 03:10 UTCJul 2, 10:45 UTC7h 35m
2026-07-01 DAL185 MXP → JFK Jul 1, 13:57 UTCJul 1, 22:37 UTC8h 40m
2026-07-01 DAL185 MXP → JFK Jul 1, 14:00 UTCJul 1, 16:30 UTC2h 30m
2026-07-01 DAL184 - Jul 1, 02:15 UTCJul 1, 09:25 UTC7h 10m
2026-06-30 DAL127 MAD → JFK Jun 30, 11:16 UTCJun 30, 18:39 UTC7h 23m
2026-06-30 DAL127 MAD → JFK Jun 30, 11:20 UTCJun 30, 12:30 UTC1h 10m
2026-06-30 DAL126 JFK → MAD Jun 30, 02:07 UTCJun 30, 08:39 UTC6h 32m
2026-06-30 DAL126 JFK → MAD Jun 30, 02:10 UTCJun 30, 08:45 UTC6h 35m
2026-06-29 DAL226 - Jun 29, 00:00 UTCJun 29, 09:29 UTC9h 30m
2026-06-28 DAL226 GRU → JFK Jun 28, 23:57 UTCJun 29, 09:25 UTC9h 28m
2026-06-28 DAL227 - Jun 28, 05:04 UTCJun 28, 13:59 UTC8h 55m
2026-06-27 DAL231 CDG → RDU Jun 27, 13:04 UTCJun 27, 21:50 UTC8h 45m
2026-06-27 DAL231 CDG → RDU Jun 27, 13:00 UTCJun 27, 21:43 UTC8h 43m
2026-06-27 DAL230 - Jun 27, 00:10 UTCJun 27, 01:44 UTC1h 35m
2026-06-27 DAL230 JFK → FCO Jun 27, 00:07 UTCJun 27, 07:33 UTC7h 26m
2026-06-26 DAL231 CDG → RDU Jun 26, 12:39 UTCJun 26, 15:29 UTC2h 50m

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 N825NW page for operator, model, and routing details .

Mode-S AB44AF frequently asked

What is Mode-S code AB44AF?
AB44AF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N825NW.
Where is Mode-S AB44AF registered?
Mode-S code AB44AF 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 AB44AF broadcasting right now?
Yes. Mode-S AB44AF is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB44AF, octal 52642257, decimal 11,224,239.
What flights does AB44AF operate?
Mode-S AB44AF has broadcast 20 distinct callsigns, including DAL185, DAL184, DAL73, DAL46, DAL135.