Apparatus

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sensors Mode-S transponder

A0B1EA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N144DU · AIRBUS A220-100 · operated by DELTA AIR LINES INC

Hex
A0B1EA
Octal
50130752
Decimal
10,531,306
Country
US
Tail
N144DU
Type
BCS1
Transponder active on ground
Flights observed
449
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:25 UTC

Last known position

Most recent position reported by Mode-S A0B1EA.

Country allocation

The ICAO 24-bit address A0B1EA 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
DAL2656 Delta Air Lines 16 2026-07-24
DAL2285 Delta Air Lines 14 2026-07-24
DAL1533 Delta Air Lines 10 2026-07-25
DAL1608 - 9 2026-07-15
DAL1342 - 9 2026-07-13
DAL2972 - 8 2026-07-18
DAL2971 Delta Air Lines 8 2026-04-21
DAL2446 Delta Air Lines 8 2026-07-24
DAL2307 Delta Air Lines 8 2026-07-23
DAL2087 - 7 2026-07-08
DAL1613 - 7 2026-07-19
DAL1449 Delta Air Lines 7 2026-06-10
DAL3188 Delta Air Lines 6 2026-07-19
DAL2929 Delta Air Lines 6 2026-07-26
DAL2866 - 6 2026-07-16
DAL2846 - 6 2026-07-15
DAL2521 - 6 2026-06-21
DAL2491 Delta Air Lines 6 2026-07-26
DAL3185 - 5 2026-07-15
DAL3123 - 5 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2113 LGA → ATL Jul 26, 21:05 UTCJul 26, 22:25 UTC1h 20m
2026-07-26 DAL2181 GSO → ATL Jul 26, 17:40 UTCJul 26, 19:50 UTC2h 10m
2026-07-26 DAL2181 GSO → ATL Jul 26, 14:15 UTCJul 26, 16:05 UTC1h 50m
2026-07-26 DAL2491 CLT → MSP Jul 26, 10:40 UTCJul 26, 13:10 UTC2h 30m
2026-07-26 DAL2929 MSP → CLT Jul 26, 01:30 UTCJul 26, 03:20 UTC1h 50m
2026-07-25 DAL1533 ORD → MSP Jul 25, 21:25 UTCJul 25, 22:35 UTC1h 10m
2026-07-25 DAL1533 ORD → MSP Jul 25, 21:23 UTCJul 25, 22:29 UTC1h 6m
2026-07-25 DAL1533 ORD → MSP Jul 25, 18:40 UTCJul 25, 19:40 UTC1h 0m
2026-07-25 DAL2847 BNA → BOS Jul 25, 14:55 UTCJul 25, 16:25 UTC1h 30m
2026-07-25 DAL2847 BNA → BOS Jul 25, 12:25 UTCJul 25, 13:40 UTC1h 15m
2026-07-24 DAL2285 MSP → DCA Jul 24, 23:15 UTCJul 25, 01:50 UTC2h 35m
2026-07-24 DAL2285 MSP → DCA Jul 24, 20:00 UTCJul 24, 22:10 UTC2h 10m
2026-07-24 DAL2656 JFK → PDX Jul 24, 16:30 UTCJul 24, 18:50 UTC2h 20m
2026-07-24 DAL2656 JFK → PDX Jul 24, 16:27 UTCJul 24, 18:45 UTC2h 18m
2026-07-24 DAL2656 JFK → PDX Jul 24, 12:40 UTCJul 24, 15:10 UTC2h 30m
2026-07-24 DAL2446 JFK → JAX Jul 24, 02:05 UTCJul 24, 02:50 UTC45m
2026-07-23 DAL2307 ATL → GSO Jul 23, 23:30 UTCJul 24, 00:20 UTC50m
2026-07-23 DAL3113 MSP → CVG Jul 23, 20:40 UTCJul 23, 22:20 UTC1h 40m
2026-07-23 DAL3113 MSP → CVG Jul 23, 18:05 UTCJul 23, 19:25 UTC1h 20m
2026-07-23 DAL2847 BNA → BOS Jul 23, 15:00 UTCJul 23, 16:45 UTC1h 45m
2026-07-23 DAL2847 BNA → BOS Jul 23, 12:25 UTCJul 23, 13:45 UTC1h 20m
2026-07-22 DAL2594 SFO → MSP Jul 22, 23:05 UTCJul 23, 01:45 UTC2h 40m
2026-07-22 DAL2594 SFO → MSP Jul 22, 23:05 UTCJul 23, 01:41 UTC2h 36m
2026-07-22 DAL2594 SFO → MSP Jul 22, 19:25 UTCJul 22, 21:25 UTC2h 0m
2026-07-22 DAL561 - Jul 22, 17:05 UTCJul 22, 18:00 UTC55m
2026-07-22 DAL561 MSP → MKE Jul 22, 15:10 UTCJul 22, 15:55 UTC45m
2026-07-22 DAL1050 - Jul 22, 11:35 UTCJul 22, 13:55 UTC2h 20m
2026-07-22 DAL2514 IND → ATL Jul 22, 00:10 UTCJul 22, 02:50 UTC2h 40m
2026-07-21 DAL2455 - Jul 21, 19:40 UTCJul 21, 22:30 UTC2h 50m
2026-07-21 DAL2455 - Jul 21, 16:15 UTCJul 21, 18:40 UTC2h 25m
2026-07-21 DAL2708 - Jul 21, 13:25 UTCJul 21, 14:50 UTC1h 25m
2026-07-21 DAL1614 LGA → MIA Jul 21, 05:15 UTCJul 21, 06:35 UTC1h 20m
2026-07-21 DAL1614 LGA → MIA Jul 21, 05:12 UTCJul 21, 06:31 UTC1h 19m
2026-07-21 DAL1024 ATL → CHA Jul 21, 02:20 UTCJul 21, 03:40 UTC1h 20m
2026-07-20 DAL1024 ATL → CHA Jul 20, 23:50 UTCJul 21, 01:05 UTC1h 14m
2026-07-20 DAL1254 ATL → PVD Jul 20, 20:45 UTCJul 20, 22:20 UTC1h 35m
2026-07-20 DAL1254 ATL → PVD Jul 20, 17:55 UTCJul 20, 19:15 UTC1h 20m
2026-07-20 DAL2363 STL → SLC Jul 20, 13:10 UTCJul 20, 15:50 UTC2h 40m
2026-07-20 DAL1609 TUS → ATL Jul 20, 03:17 UTCJul 20, 04:17 UTC1h 0m
2026-07-20 DAL1609 TUS → ATL Jul 20, 03:20 UTCJul 20, 04:20 UTC1h 0m
2026-07-19 DAL1613 - Jul 19, 21:20 UTCJul 19, 22:20 UTC1h 0m
2026-07-19 DAL1613 - Jul 19, 19:05 UTCJul 19, 20:10 UTC1h 5m
2026-07-19 DAL3188 BZN → SLC Jul 19, 16:25 UTCJul 19, 17:35 UTC1h 10m
2026-07-19 DAL3188 BZN → SLC Jul 19, 14:05 UTCJul 19, 15:05 UTC1h 0m
2026-07-19 DAL2848 FLL → DTW Jul 19, 11:00 UTCJul 19, 12:50 UTC1h 50m
2026-07-19 DAL3075 - Jul 19, 03:10 UTCJul 19, 04:40 UTC1h 30m
2026-07-18 DAL362 - Jul 18, 20:00 UTCJul 19, 02:05 UTC6h 5m
2026-07-18 DAL2972 - Jul 18, 16:30 UTCJul 18, 18:30 UTC2h 0m
2026-07-18 DAL2972 MSP → DFW Jul 18, 13:10 UTCJul 18, 15:05 UTC1h 55m
2026-07-18 DAL2285 MSP → MSP Jul 18, 03:35 UTCJul 18, 07:35 UTC4h 0m

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 N144DU page for operator, model, and routing details .

Mode-S A0B1EA frequently asked

What is Mode-S code A0B1EA?
A0B1EA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N144DU.
Where is Mode-S A0B1EA registered?
Mode-S code A0B1EA 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 A0B1EA broadcasting right now?
Mode-S A0B1EA is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0B1EA, octal 50130752, decimal 10,531,306.
What flights does A0B1EA operate?
Mode-S A0B1EA has broadcast 20 distinct callsigns, including DAL2656, DAL2285, DAL1533, DAL1608, DAL1342.