Apparatus

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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 Jul 26, 22:45 UTC
Flights observed
320
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

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
DAL1177 - 8 2026-07-18
DAL2520 Delta Air Lines 7 2026-07-25
DAL2339 Delta Air Lines 6 2026-04-23
DAL525 Delta Air Lines 5 2026-07-25
DAL337 - 5 2026-07-02
DAL540 Delta Air Lines 4 2026-07-21
DAL346 Delta Air Lines 4 2026-07-24
DAL2936 - 4 2026-07-18
DAL2465 - 4 2026-07-14
DAL2078 - 4 2026-07-06
DAL1882 - 4 2026-07-05
DAL1479 Delta Air Lines 4 2026-07-22
DAL1465 - 4 2026-06-19
DAL1362 Delta Air Lines 4 2026-07-20
DAL1305 Delta Air Lines 4 2026-04-16
DAL992 Delta Air Lines 3 2026-07-23
DAL969 Delta Air Lines 3 2026-07-23
DAL968 - 3 2026-07-04
DAL957 Delta Air Lines 3 2026-07-16
DAL912 - 3 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL706 SAN → DTW Jul 26, 20:20 UTCJul 26, 22:45 UTC2h 25m
2026-07-26 DAL706 SAN → DTW Jul 26, 16:10 UTCJul 26, 18:45 UTC2h 35m
2026-07-26 DAL1505 SLC → SAT Jul 26, 13:20 UTCJul 26, 14:20 UTC1h 0m
2026-07-26 DAL1505 SLC → SAT Jul 26, 13:16 UTCJul 26, 14:20 UTC1h 4m
2026-07-25 DAL2520 LGA → MCO Jul 25, 20:35 UTCJul 25, 22:40 UTC2h 5m
2026-07-25 DAL525 LGA → MCO Jul 25, 16:45 UTCJul 25, 18:25 UTC1h 40m
2026-07-25 DAL1763 SJU → ATL Jul 25, 13:30 UTCJul 25, 15:05 UTC1h 35m
2026-07-25 DAL1763 SJU → ATL Jul 25, 11:50 UTCJul 25, 12:00 UTC10m
2026-07-25 DAL1763 SJU → ATL Jul 25, 11:45 UTCJul 25, 15:06 UTC3h 21m
2026-07-25 DAL1791 ATL → SJU Jul 25, 02:15 UTCJul 25, 02:40 UTC25m
2026-07-24 DAL1791 ATL → SJU Jul 24, 23:20 UTCJul 25, 00:45 UTC1h 25m
2026-07-24 DAL346 BOS → SFO Jul 24, 21:20 UTCJul 24, 21:55 UTC35m
2026-07-24 DAL346 BOS → SFO Jul 24, 17:15 UTCJul 24, 19:45 UTC2h 30m
2026-07-24 DAL1113 PHL → SLC Jul 24, 13:10 UTCJul 24, 15:50 UTC2h 40m
2026-07-24 DAL1232 DEN → DTW Jul 24, 01:30 UTCJul 24, 03:20 UTC1h 50m
2026-07-23 DAL969 HNL → DTW Jul 23, 20:55 UTCJul 23, 22:50 UTC1h 55m
2026-07-23 DAL525 LGA → MCO Jul 23, 16:50 UTCJul 23, 19:10 UTC2h 20m
2026-07-23 DAL525 LGA → MCO Jul 23, 16:45 UTCJul 23, 19:08 UTC2h 23m
2026-07-23 DAL992 SEA → MSP Jul 23, 13:30 UTCJul 23, 15:25 UTC1h 55m
2026-07-23 DAL2520 LGA → MCO Jul 23, 00:45 UTCJul 23, 02:45 UTC2h 0m
2026-07-22 DAL2520 LGA → MCO Jul 22, 20:55 UTCJul 22, 23:15 UTC2h 20m
2026-07-22 DAL525 LGA → MCO Jul 22, 17:00 UTCJul 22, 18:55 UTC1h 55m
2026-07-22 DAL1479 MCO → LGA Jul 22, 14:15 UTCJul 22, 15:40 UTC1h 25m
2026-07-22 DAL1479 MCO → LGA Jul 22, 11:30 UTCJul 22, 12:40 UTC1h 10m
2026-07-21 DAL540 BOS → TPA Jul 21, 22:30 UTCJul 22, 02:25 UTC3h 55m
2026-07-21 DAL540 BOS → TPA Jul 21, 16:55 UTCJul 21, 20:55 UTC4h 0m
2026-07-21 DAL1505 SLC → SAT Jul 21, 13:25 UTCJul 21, 14:30 UTC1h 5m
2026-07-20 DAL2561 LGA → MCO Jul 20, 23:10 UTCJul 21, 01:25 UTC2h 15m
2026-07-20 DAL1362 RDU → LGA Jul 20, 19:00 UTCJul 20, 21:15 UTC2h 15m
2026-07-20 DAL1362 RDU → LGA Jul 20, 18:58 UTCJul 20, 21:11 UTC2h 13m
2026-07-20 DAL2019 JFK → MCO Jul 20, 14:20 UTCJul 20, 16:30 UTC2h 10m
2026-07-20 DAL2702 - Jul 20, 10:10 UTCJul 20, 12:15 UTC2h 5m
2026-07-20 DAL2702 MCO → JFK Jul 20, 10:09 UTCJul 20, 12:15 UTC2h 6m
2026-07-20 DAL1562 ATL → CLT Jul 20, 05:05 UTCJul 20, 06:05 UTC1h 0m
2026-07-20 DAL1562 ATL → CLT Jul 20, 05:03 UTCJul 20, 06:03 UTC1h 0m
2026-07-20 DAL840 DEN → ATL Jul 20, 00:45 UTCJul 20, 03:20 UTC2h 35m
2026-07-19 DAL1025 MSP → DEN Jul 19, 20:40 UTCJul 19, 22:10 UTC1h 30m
2026-07-19 DAL1578 - Jul 19, 13:10 UTCJul 19, 15:10 UTC2h 0m
2026-07-18 DAL1602 - Jul 18, 23:35 UTCJul 19, 01:45 UTC2h 10m
2026-07-18 DAL2936 SLC → MSP Jul 18, 20:10 UTCJul 18, 22:15 UTC2h 5m
2026-07-18 DAL1177 - Jul 18, 17:05 UTCJul 18, 18:30 UTC1h 25m
2026-07-18 DAL1177 SLC → SAN Jul 18, 13:55 UTCJul 18, 15:25 UTC1h 30m
2026-07-18 DAL660 ATL → SLC Jul 18, 02:55 UTCJul 18, 06:10 UTC3h 15m
2026-07-17 DAL1983 ATL → BZE Jul 17, 23:45 UTCJul 18, 00:39 UTC55m
2026-07-17 DAL1983 ATL → BZE Jul 17, 19:35 UTCJul 17, 21:39 UTC2h 5m
2026-07-17 DAL754 SAN → DTW Jul 17, 13:45 UTCJul 17, 17:45 UTC4h 0m
2026-07-17 DAL754 - Jul 17, 13:50 UTCJul 17, 17:44 UTC3h 55m
2026-07-17 DAL896 MSP → PBI Jul 17, 01:59 UTCJul 17, 05:50 UTC3h 50m
2026-07-17 DAL896 MSP → PBI Jul 17, 01:56 UTCJul 17, 05:40 UTC3h 44m
2026-07-16 DAL957 JFK → SFO Jul 16, 21:45 UTCJul 17, 00:25 UTC2h 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 Jul 26, 22:45 UTC.
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 DAL1177, DAL2520, DAL2339, DAL525, DAL337.