Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A0103B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N103DY · AIRBUS A-321 · operated by UMB BANK NA TRUSTEE

Hex
A0103B
Octal
50010073
Decimal
10,489,915
Country
US
Tail
N103DY
Type
A321
No current signal · last broadcast 21d ago
Flights observed
119
Distinct callsigns
20
Country
US
Last broadcast
21d ago

Last known position

Most recent position reported by Mode-S A0103B.

Country allocation

The ICAO 24-bit address A0103B 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
DAL2339 Delta Air Lines 6 2026-04-23
DAL1305 Delta Air Lines 4 2026-04-16
DAL535 Delta Air Lines 3 2026-04-21
DAL2356 Delta Air Lines 3 2026-04-18
DAL2287 Delta Air Lines 3 2026-04-14
DAL2121 Delta Air Lines 3 2026-04-25
DAL1946 Delta Air Lines 3 2026-05-07
DAL9950 Delta Air Lines 2 2026-05-08
DAL995 Delta Air Lines 2 2026-04-19
DAL965 Delta Air Lines 2 2026-04-29
DAL835 Delta Air Lines 2 2026-04-15
DAL501 Delta Air Lines 2 2026-05-03
DAL395 Delta Air Lines 2 2026-05-03
DAL371 - 2 2026-04-16
DAL346 Delta Air Lines 2 2026-05-01
DAL323 Delta Air Lines 2 2026-04-20
DAL2998 Delta Air Lines 2 2026-04-15
DAL2719 Delta Air Lines 2 2026-04-14
DAL2647 Delta Air Lines 2 2026-04-25
DAL2454 Delta Air Lines 2 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-08 DAL9950 SFO → LAX May 8, 14:45 UTCMay 8, 17:55 UTC3h 10m
2026-05-08 DAL9950 SFO → LAX May 8, 14:45 UTCMay 8, 16:15 UTC1h 30m
2026-05-07 DAL1946 SJU → ATL May 7, 23:39 UTCMay 8, 01:19 UTC1h 40m
2026-05-07 DAL1946 SJU → ATL May 7, 21:55 UTCMay 7, 22:05 UTC10m
2026-05-07 DAL1946 SJU → ATL May 7, 17:15 UTCMay 7, 20:25 UTC3h 10m
2026-05-07 DAL1479 MCO → LGA May 7, 14:20 UTCMay 7, 15:35 UTC1h 15m
2026-05-07 DAL1479 MCO → LGA May 7, 11:35 UTCMay 7, 12:35 UTC1h 0m
2026-05-05 DAL2135 BDL → ATL May 5, 16:25 UTCMay 5, 17:00 UTC35m
2026-05-05 DAL341 BOS → SEA May 5, 12:15 UTCMay 5, 14:35 UTC2h 20m
2026-05-05 DAL1064 BOS → ATL May 5, 03:40 UTCMay 5, 05:30 UTC1h 50m
2026-05-05 DAL1220 DAL → ATL May 5, 01:15 UTCMay 5, 02:40 UTC1h 25m
2026-05-05 DAL1220 DAL → ATL May 5, 01:12 UTCMay 5, 02:36 UTC1h 24m
2026-05-04 DAL519 BOS → LAX May 4, 20:00 UTCMay 4, 22:45 UTC2h 45m
2026-05-04 DAL990 DTW → BOS May 4, 16:10 UTCMay 4, 17:55 UTC1h 45m
2026-05-04 DAL513 ATL → EWR May 4, 12:45 UTCMay 4, 14:30 UTC1h 45m
2026-05-03 DAL395 LAX → ATL May 3, 21:50 UTCMay 4, 01:30 UTC3h 40m
2026-05-03 DAL501 ATL → LAX May 3, 15:55 UTCMay 3, 20:25 UTC4h 30m
2026-05-03 DAL447 LGA → ATL May 3, 05:20 UTCMay 3, 09:05 UTC3h 45m
2026-05-02 DAL2891 BOS → TPA May 2, 21:05 UTCMay 3, 01:25 UTC4h 20m
2026-05-02 DAL975 LIH → SEA May 2, 00:25 UTCMay 2, 02:30 UTC2h 5m
2026-05-01 DAL997 MCO → LGA May 1, 20:45 UTCMay 1, 22:15 UTC1h 30m
2026-05-01 DAL346 BOS → SFO May 1, 16:50 UTCMay 1, 19:05 UTC2h 15m
2026-05-01 DAL346 BOS → SFO May 1, 12:20 UTCMay 1, 15:25 UTC3h 5m
2026-05-01 DAL932 JFK → ATL May 1, 05:10 UTCMay 1, 08:45 UTC3h 35m
2026-04-30 DAL369 BTV → ATL Apr 30, 20:55 UTCMay 1, 01:30 UTC4h 35m
2026-04-30 DAL1122 SEA → SFO Apr 30, 17:25 UTCApr 30, 18:40 UTC1h 15m
2026-04-30 DAL2589 IAH → MSP Apr 30, 14:25 UTCApr 30, 15:45 UTC1h 20m
2026-04-30 DAL651 DTW → PHL Apr 30, 10:30 UTCApr 30, 11:55 UTC1h 25m
2026-04-29 DAL395 LAX → ATL Apr 29, 23:00 UTCApr 30, 02:15 UTC3h 14m
2026-04-29 DAL501 ATL → LAX Apr 29, 15:55 UTCApr 29, 20:55 UTC5h 0m
2026-04-29 DAL965 ATL → SJC Apr 29, 11:55 UTCApr 29, 13:30 UTC1h 35m
2026-04-29 DAL965 ATL → SJC Apr 29, 11:46 UTCApr 29, 13:24 UTC1h 38m
2026-04-28 DAL2172 JFK → MSP Apr 28, 22:45 UTCApr 29, 02:09 UTC3h 25m
2026-04-28 DAL2155 LGA → MCO Apr 28, 16:50 UTCApr 28, 21:40 UTC4h 50m
2026-04-28 DAL1078 BOS → LGA Apr 28, 14:00 UTCApr 28, 15:20 UTC1h 20m
2026-04-27 DAL434 BOS → LAX Apr 27, 22:20 UTCApr 28, 00:05 UTC1h 45m
2026-04-27 DAL2235 SJC → SLC Apr 27, 18:00 UTCApr 27, 20:25 UTC2h 25m
2026-04-27 DAL2849 DCA → DTW Apr 27, 14:45 UTCApr 27, 16:35 UTC1h 50m
2026-04-27 DAL1746 ATL → GRR Apr 27, 11:05 UTCApr 27, 12:30 UTC1h 25m
2026-04-27 DAL1566 MSN → MSP Apr 27, 06:25 UTCApr 27, 09:40 UTC3h 15m
2026-04-27 DAL2076 BOS → BNA Apr 27, 00:35 UTCApr 27, 04:40 UTC4h 5m
2026-04-26 DAL1911 CUN → DTW Apr 26, 19:30 UTCApr 26, 22:40 UTC3h 10m
2026-04-26 DAL578 DTW → CUN Apr 26, 14:20 UTCApr 26, 17:30 UTC3h 10m
2026-04-26 DAL1484 ATL → MSP Apr 26, 01:05 UTCApr 26, 02:20 UTC1h 15m
2026-04-25 DAL2647 BOS → LAX Apr 25, 19:25 UTCApr 25, 22:25 UTC3h 0m
2026-04-25 DAL2121 OMA → MSP Apr 25, 14:25 UTCApr 25, 18:05 UTC3h 40m
2026-04-25 DAL2121 OMA → MSP Apr 25, 14:20 UTCApr 25, 18:00 UTC3h 40m
2026-04-25 DAL1289 PHL → ATL Apr 25, 05:05 UTCApr 25, 07:35 UTC2h 30m
2026-04-24 DAL836 HNL → ATL Apr 24, 20:40 UTCApr 25, 00:30 UTC3h 50m
2026-04-24 DAL1179 AUS → BOS Apr 24, 15:15 UTCApr 24, 18:55 UTC3h 40m

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 N103DY page for operator, model, and routing details .

Mode-S A0103B frequently asked

What is Mode-S code A0103B?
A0103B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N103DY.
Where is Mode-S A0103B registered?
Mode-S code A0103B 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 A0103B broadcasting right now?
No active broadcast right now. Last signal was 21d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0103B, octal 50010073, decimal 10,489,915.
What flights does A0103B operate?
Mode-S A0103B has broadcast 20 distinct callsigns, including DAL2339, DAL1305, DAL535, DAL2356, DAL2287.