Apparatus

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sensors Mode-S transponder

AB35D3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N821NW · AIRBUS A-330-300 · operated by DELTA AIR LINES INC

Hex
AB35D3
Octal
52632723
Decimal
11,220,435
Country
US
Tail
N821NW
Type
A333
Broadcasting now · callsign DAL136 · 35,000 ft
Flights observed
322
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Current position

AB35D3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AB35D3 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
DAL231 - 15 2026-07-15
DAL128 Delta Air Lines 14 2026-07-25
DAL97 Delta Air Lines 11 2026-04-26
DAL182 Delta Air Lines 10 2026-07-26
DAL129 Delta Air Lines 10 2026-07-26
DAL127 - 10 2026-07-12
DAL73 - 9 2026-07-18
DAL230 - 9 2026-07-15
DAL134 Delta Air Lines 9 2026-07-17
DAL98 Delta Air Lines 8 2026-04-26
DAL353 - 8 2026-07-13
DAL183 - 8 2026-07-13
DAL75 Delta Air Lines 7 2026-06-05
DAL46 - 7 2026-07-15
DAL266 Delta Air Lines 7 2026-04-26
DAL236 Delta Air Lines 7 2026-05-30
DAL958 - 6 2026-07-14
DAL837 Delta Air Lines 6 2026-07-21
DAL250 - 6 2026-07-08
DAL229 Delta Air Lines 6 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL182 JFK → FCO Jul 26, 21:50 UTCJul 26, 22:45 UTC55m
2026-07-26 DAL129 JFK → BCN Jul 26, 09:55 UTCJul 26, 17:33 UTC7h 38m
2026-07-26 DAL129 JFK → BCN Jul 26, 09:55 UTCJul 26, 10:45 UTC50m
2026-07-25 DAL128 BCN → JFK Jul 25, 23:15 UTCJul 26, 06:20 UTC7h 5m
2026-07-25 DAL128 BCN → JFK Jul 25, 23:14 UTCJul 26, 06:22 UTC7h 8m
2026-07-25 DAL129 JFK → BCN Jul 25, 09:15 UTCJul 25, 16:45 UTC7h 30m
2026-07-24 DAL128 BCN → JFK Jul 24, 23:50 UTCJul 25, 06:55 UTC7h 5m
2026-07-24 DAL47 AMS → JFK Jul 24, 08:30 UTCJul 24, 15:45 UTC7h 15m
2026-07-23 DAL72 ATL → AMS Jul 23, 21:41 UTCJul 24, 05:31 UTC7h 50m
2026-07-23 DAL72 ATL → AMS Jul 23, 21:45 UTCJul 24, 00:30 UTC2h 45m
2026-07-23 DAL309 IAD → SEA Jul 23, 05:05 UTCJul 23, 09:40 UTC4h 35m
2026-07-23 DAL309 IAD → SEA Jul 23, 01:31 UTCJul 23, 09:40 UTC8h 9m
2026-07-22 DAL312 - Jul 22, 23:20 UTCJul 22, 23:40 UTC20m
2026-07-22 DAL312 - Jul 22, 15:25 UTCJul 22, 19:00 UTC3h 35m
2026-07-21 DAL837 ATL → HNL Jul 21, 23:30 UTCJul 21, 23:45 UTC15m
2026-07-21 DAL837 ATL → HNL Jul 21, 14:30 UTCJul 21, 18:55 UTC4h 25m
2026-07-21 DAL104 GRU → ATL Jul 21, 02:10 UTCJul 21, 11:10 UTC9h 0m
2026-07-19 DAL105 ATL → GRU Jul 19, 23:20 UTCJul 20, 08:25 UTC9h 5m
2026-07-19 DAL150 LIM → ATL Jul 19, 05:45 UTCJul 19, 11:45 UTC6h 0m
2026-07-18 DAL151 ATL → LIM Jul 18, 20:15 UTCJul 19, 02:20 UTC6h 5m
2026-07-18 DAL73 - Jul 18, 08:55 UTCJul 18, 17:45 UTC8h 50m
2026-07-17 DAL134 DTW → AMS Jul 17, 22:40 UTCJul 18, 05:55 UTC7h 16m
2026-07-17 DAL23 - Jul 17, 07:20 UTCJul 17, 16:00 UTC8h 40m
2026-07-16 DAL22 - Jul 16, 20:49 UTCJul 17, 04:44 UTC7h 55m
2026-07-16 DAL22 DTW → MUC Jul 16, 20:49 UTCJul 17, 04:51 UTC8h 2m
2026-07-16 DAL135 - Jul 16, 09:10 UTCJul 16, 10:40 UTC1h 30m
2026-07-16 DAL135 AMS → DTW Jul 16, 09:09 UTCJul 16, 17:02 UTC7h 53m
2026-07-15 DAL46 JFK → AMS Jul 15, 22:40 UTCJul 16, 05:30 UTC6h 50m
2026-07-15 DAL231 - Jul 15, 10:30 UTCJul 15, 12:45 UTC2h 15m
2026-07-15 DAL231 FCO → JFK Jul 15, 10:29 UTCJul 15, 19:26 UTC8h 57m
2026-07-15 DAL231 FCO → JFK Jul 15, 10:29 UTCJul 15, 19:24 UTC8h 55m
2026-07-15 DAL230 - Jul 15, 00:25 UTCJul 15, 02:15 UTC1h 50m
2026-07-15 DAL230 JFK → FCO Jul 15, 00:23 UTCJul 15, 08:20 UTC7h 57m
2026-07-14 DAL958 - Jul 14, 15:45 UTCJul 14, 20:50 UTC5h 5m
2026-07-13 DAL353 - Jul 13, 20:45 UTCJul 14, 01:35 UTC4h 50m
2026-07-13 DAL183 - Jul 13, 08:45 UTCJul 13, 17:25 UTC8h 40m
2026-07-12 DAL182 - Jul 12, 21:55 UTCJul 13, 05:50 UTC7h 55m
2026-07-12 DAL127 MAD → JFK Jul 12, 11:10 UTCJul 12, 18:25 UTC7h 15m
2026-07-12 DAL127 MAD → JFK Jul 12, 11:06 UTCJul 12, 18:22 UTC7h 16m
2026-07-12 DAL126 JFK → MAD Jul 12, 01:35 UTCJul 12, 08:45 UTC7h 10m
2026-07-11 DAL185 MXP → JFK Jul 11, 13:30 UTCJul 11, 21:45 UTC8h 15m
2026-07-11 DAL184 JFK → MXP Jul 11, 03:05 UTCJul 11, 10:25 UTC7h 20m
2026-07-10 DAL231 - Jul 10, 12:05 UTCJul 10, 20:45 UTC8h 40m
2026-07-10 DAL231 FCO → JFK Jul 10, 12:04 UTCJul 10, 20:43 UTC8h 39m
2026-07-10 DAL230 - Jul 10, 01:35 UTCJul 10, 06:45 UTC5h 10m
2026-07-10 DAL230 JFK → FCO Jul 10, 01:34 UTCJul 10, 09:22 UTC7h 48m
2026-07-09 DAL49 AMS → JFK Jul 9, 13:15 UTCJul 9, 14:55 UTC1h 40m
2026-07-09 DAL49 AMS → JFK Jul 9, 13:11 UTCJul 9, 20:47 UTC7h 36m
2026-07-09 DAL49 AMS → JFK Jul 9, 13:11 UTCJul 9, 20:50 UTC7h 39m
2026-07-09 DAL144 SEA → AMS Jul 9, 00:55 UTCJul 9, 10:15 UTC9h 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 N821NW page for operator, model, and routing details .

Mode-S AB35D3 frequently asked

What is Mode-S code AB35D3?
AB35D3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N821NW.
Where is Mode-S AB35D3 registered?
Mode-S code AB35D3 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 AB35D3 broadcasting right now?
Yes. Mode-S AB35D3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB35D3, octal 52632723, decimal 11,220,435.
What flights does AB35D3 operate?
Mode-S AB35D3 has broadcast 20 distinct callsigns, including DAL231, DAL128, DAL97, DAL182, DAL129.