Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB538B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N829NW · AIRBUS A-330-300 · operated by BANK OF UTAH TRUSTEE

Hex
AB538B
Octal
52651613
Decimal
11,228,043
Country
US
Tail
N829NW
Type
A333
No current signal · last broadcast Jul 26, 19:05 UTC
Flights observed
290
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:05 UTC

Last known position

Most recent position reported by Mode-S AB538B.

Country allocation

The ICAO 24-bit address AB538B 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
DAL152 - 12 2026-07-19
DAL153 Delta Air Lines 11 2026-07-19
DAL75 - 9 2026-07-13
DAL259 Delta Air Lines 9 2026-05-01
DAL228 Delta Air Lines 9 2026-07-18
DAL194 - 9 2026-07-16
DAL277 - 8 2026-07-17
DAL276 - 8 2026-07-17
DAL251 - 8 2026-07-16
DAL250 Delta Air Lines 8 2026-06-29
DAL207 - 8 2026-06-28
DAL206 Delta Air Lines 8 2026-07-21
DAL195 - 8 2026-06-30
DAL163 - 8 2026-07-12
DAL176 - 7 2026-07-14
DAL104 Delta Air Lines 7 2026-07-25
DAL74 - 6 2026-07-12
DAL72 Delta Air Lines 6 2026-05-08
DAL313 Delta Air Lines 6 2026-07-26
DAL312 Delta Air Lines 6 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL312 JFK → HNL Jul 26, 15:35 UTCJul 26, 19:05 UTC3h 30m
2026-07-26 DAL313 BOS → LAX Jul 26, 06:15 UTCJul 26, 09:45 UTC3h 31m
2026-07-26 DAL313 BOS → LAX Jul 26, 02:50 UTCJul 26, 03:10 UTC20m
2026-07-25 DAL837 ATL → HNL Jul 25, 16:00 UTCJul 26, 00:50 UTC8h 50m
2026-07-25 DAL837 ATL → HNL Jul 25, 15:56 UTCJul 26, 00:43 UTC8h 47m
2026-07-25 DAL104 GRU → ATL Jul 25, 02:10 UTCJul 25, 06:45 UTC4h 35m
2026-07-25 DAL104 GRU → ATL Jul 25, 02:09 UTCJul 25, 11:20 UTC9h 11m
2026-07-23 DAL105 ATL → GRU Jul 23, 23:30 UTCJul 24, 08:35 UTC9h 5m
2026-07-23 DAL105 ATL → GRU Jul 23, 23:26 UTCJul 24, 08:28 UTC9h 2m
2026-07-23 DAL175 MXP → ATL Jul 23, 10:10 UTCJul 23, 19:35 UTC9h 25m
2026-07-22 DAL174 ATL → MXP Jul 22, 22:45 UTCJul 23, 06:45 UTC8h 0m
2026-07-22 DAL174 ATL → MXP Jul 22, 22:41 UTCJul 23, 07:31 UTC8h 50m
2026-07-21 DAL67 - Jul 21, 12:20 UTCJul 21, 14:55 UTC2h 35m
2026-07-21 DAL67 FCO → ATL Jul 21, 12:17 UTCJul 21, 22:35 UTC10h 18m
2026-07-21 DAL206 DTW → FCO Jul 21, 00:30 UTCJul 21, 09:05 UTC8h 35m
2026-07-21 DAL206 DTW → FCO Jul 21, 00:27 UTCJul 21, 09:09 UTC8h 42m
2026-07-20 DAL229 - Jul 20, 09:05 UTCJul 20, 17:00 UTC7h 55m
2026-07-19 DAL152 - Jul 19, 21:50 UTCJul 20, 00:45 UTC2h 55m
2026-07-19 DAL152 MSP → CDG Jul 19, 21:48 UTCJul 20, 06:08 UTC8h 20m
2026-07-19 DAL153 FCO → JFK Jul 19, 09:50 UTCJul 19, 11:40 UTC1h 50m
2026-07-19 DAL153 FCO → JFK Jul 19, 09:48 UTCJul 19, 18:33 UTC8h 45m
2026-07-19 DAL153 FCO → JFK Jul 19, 09:48 UTCJul 19, 18:27 UTC8h 39m
2026-07-18 DAL228 CVG → CDG Jul 18, 23:00 UTCJul 19, 06:15 UTC7h 15m
2026-07-18 DAL228 CVG → CDG Jul 18, 22:58 UTCJul 19, 06:21 UTC7h 23m
2026-07-18 DAL133 - Jul 18, 08:15 UTCJul 18, 16:25 UTC8h 10m
2026-07-17 DAL256 BOS → AMS Jul 17, 23:00 UTCJul 18, 00:15 UTC1h 15m
2026-07-17 DAL256 BOS → AMS Jul 17, 22:58 UTCJul 18, 05:54 UTC6h 56m
2026-07-17 DAL256 BOS → AMS Jul 17, 22:40 UTCJul 17, 22:45 UTC5m
2026-07-17 DAL277 NCE → BOS Jul 17, 11:20 UTCJul 17, 19:09 UTC7h 50m
2026-07-17 DAL276 BOS → NCE Jul 17, 00:40 UTCJul 17, 08:00 UTC7h 20m
2026-07-16 DAL251 BCN → BOS Jul 16, 13:25 UTCJul 16, 21:10 UTC7h 45m
2026-07-16 DAL194 - Jul 16, 02:05 UTCJul 16, 03:35 UTC1h 30m
2026-07-16 DAL194 ATL → BCN Jul 16, 02:03 UTCJul 16, 10:35 UTC8h 32m
2026-07-15 DAL193 - Jul 15, 10:00 UTCJul 15, 12:30 UTC2h 30m
2026-07-15 DAL193 VCE → ATL Jul 15, 09:56 UTCJul 15, 19:46 UTC9h 50m
2026-07-14 DAL192 ATL → VCE Jul 14, 21:55 UTCJul 15, 07:30 UTC9h 34m
2026-07-14 DAL177 DUB → ATL Jul 14, 11:00 UTCJul 14, 18:55 UTC7h 55m
2026-07-14 DAL176 ATL → DUB Jul 14, 00:58 UTCJul 14, 08:34 UTC7h 36m
2026-07-14 DAL176 - Jul 14, 01:00 UTCJul 14, 04:00 UTC3h 0m
2026-07-13 DAL75 AMS → ATL Jul 13, 12:16 UTCJul 13, 20:56 UTC8h 40m
2026-07-13 DAL75 - Jul 13, 12:20 UTCJul 13, 21:05 UTC8h 45m
2026-07-13 DAL162 MSP → AMS Jul 13, 01:25 UTCJul 13, 09:25 UTC8h 0m
2026-07-12 DAL163 - Jul 12, 11:01 UTCJul 12, 19:20 UTC8h 20m
2026-07-12 DAL74 - Jul 12, 00:05 UTCJul 12, 02:45 UTC2h 40m
2026-07-12 DAL74 ATL → AMS Jul 12, 00:05 UTCJul 12, 08:08 UTC8h 3m
2026-07-11 DAL75 AMS → ATL Jul 11, 11:39 UTCJul 11, 21:04 UTC9h 25m
2026-07-11 DAL75 - Jul 11, 11:40 UTCJul 11, 21:05 UTC9h 25m
2026-07-11 DAL162 - Jul 11, 03:40 UTCJul 11, 08:55 UTC5h 15m
2026-07-11 DAL162 - Jul 11, 01:10 UTCJul 11, 03:35 UTC2h 25m
2026-07-10 DAL163 AMS → MSP Jul 10, 11:06 UTCJul 10, 19:34 UTC8h 28m

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 N829NW page for operator, model, and routing details .

Mode-S AB538B frequently asked

What is Mode-S code AB538B?
AB538B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N829NW.
Where is Mode-S AB538B registered?
Mode-S code AB538B 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 AB538B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB538B, octal 52651613, decimal 11,228,043.
What flights does AB538B operate?
Mode-S AB538B has broadcast 20 distinct callsigns, including DAL152, DAL153, DAL75, DAL259, DAL228.