Apparatus

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sensors Mode-S transponder

A008C9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N101DU · AIRBUS A220-100 · operated by BANK OF UTAH TRUSTEE

Hex
A008C9
Octal
50004311
Decimal
10,488,009
Country
US
Tail
N101DU
Type
BCS1
Transponder active on ground
Flights observed
461
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S A008C9.

Country allocation

The ICAO 24-bit address A008C9 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
DAL1449 - 17 2026-06-21
DAL2847 - 12 2026-06-23
DAL1442 Delta Air Lines 9 2026-07-18
DAL1367 Delta Air Lines 9 2026-07-25
DAL2903 Delta Air Lines 8 2026-07-23
DAL1835 - 8 2026-07-15
DAL1471 Delta Air Lines 8 2026-06-05
DAL1260 Delta Air Lines 8 2026-07-21
DAL2972 Delta Air Lines 7 2026-07-06
DAL2582 - 7 2026-07-15
DAL1623 Delta Air Lines 7 2026-07-26
DAL1503 - 7 2026-07-17
DAL1302 Delta Air Lines 7 2026-07-26
DAL572 Delta Air Lines 6 2026-04-15
DAL339 - 6 2026-07-15
DAL2885 - 6 2026-06-24
DAL2798 Delta Air Lines 6 2026-07-20
DAL2795 Delta Air Lines 6 2026-07-25
DAL2574 - 6 2026-06-23
DAL2057 Delta Air Lines 6 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1254 ATL → PVD Jul 26, 21:50 UTCJul 26, 22:15 UTC25m
2026-07-26 DAL1254 ATL → PVD Jul 26, 19:25 UTCJul 26, 20:50 UTC1h 25m
2026-07-26 DAL1302 BOS → RDU Jul 26, 16:50 UTCJul 26, 18:10 UTC1h 20m
2026-07-26 DAL1623 ATL → SJC Jul 26, 14:10 UTCJul 26, 15:30 UTC1h 20m
2026-07-25 DAL1623 ATL → SJC Jul 25, 22:15 UTCJul 25, 23:15 UTC1h 0m
2026-07-25 DAL1623 ATL → SJC Jul 25, 19:30 UTCJul 25, 20:30 UTC1h 0m
2026-07-25 DAL1367 ORD → ATL Jul 25, 17:00 UTCJul 25, 18:10 UTC1h 10m
2026-07-25 DAL1367 ORD → ATL Jul 25, 14:25 UTCJul 25, 15:40 UTC1h 15m
2026-07-25 DAL2795 ATL → MCI Jul 25, 11:47 UTCJul 25, 12:50 UTC1h 3m
2026-07-25 DAL2795 ATL → MCI Jul 25, 05:30 UTCJul 25, 12:55 UTC7h 25m
2026-07-25 DAL1299 LGA → SRQ Jul 25, 00:15 UTCJul 25, 02:55 UTC2h 40m
2026-07-24 DAL1299 LGA → SRQ Jul 24, 19:55 UTCJul 24, 22:35 UTC2h 40m
2026-07-24 DAL1198 ATL → MCO Jul 24, 17:15 UTCJul 24, 18:40 UTC1h 25m
2026-07-24 DAL1198 ATL → MCO Jul 24, 14:40 UTCJul 24, 16:05 UTC1h 25m
2026-07-24 DAL2795 ATL → MCI Jul 24, 12:20 UTCJul 24, 12:55 UTC35m
2026-07-24 DAL2795 ATL → MCI Jul 24, 11:47 UTCJul 24, 12:53 UTC1h 6m
2026-07-24 DAL1723 LAX → PDX Jul 24, 05:40 UTCJul 24, 06:15 UTC35m
2026-07-24 DAL1723 LAX → PDX Jul 24, 05:40 UTCJul 24, 06:42 UTC1h 2m
2026-07-23 DAL2903 PVD → MSP Jul 23, 23:10 UTCJul 24, 01:15 UTC2h 5m
2026-07-23 DAL2903 PVD → MSP Jul 23, 19:55 UTCJul 23, 21:45 UTC1h 50m
2026-07-23 DAL1367 ORD → ATL Jul 23, 16:50 UTCJul 23, 18:05 UTC1h 15m
2026-07-23 DAL1367 ORD → ATL Jul 23, 14:30 UTCJul 23, 15:50 UTC1h 20m
2026-07-23 DAL2795 ATL → MCI Jul 23, 12:25 UTCJul 23, 13:20 UTC55m
2026-07-23 DAL2795 ATL → MCI Jul 23, 12:14 UTCJul 23, 13:31 UTC1h 17m
2026-07-23 DAL1723 LAX → PDX Jul 23, 05:35 UTCJul 23, 06:10 UTC35m
2026-07-23 DAL1723 LAX → PDX Jul 23, 05:33 UTCJul 23, 06:33 UTC1h 0m
2026-07-22 DAL2903 PVD → MSP Jul 22, 23:05 UTCJul 23, 01:25 UTC2h 20m
2026-07-22 DAL2903 PVD → MSP Jul 22, 19:45 UTCJul 22, 21:45 UTC2h 0m
2026-07-22 DAL1367 ORD → ATL Jul 22, 17:00 UTCJul 22, 18:20 UTC1h 20m
2026-07-22 DAL1367 ORD → ATL Jul 22, 14:40 UTCJul 22, 16:00 UTC1h 20m
2026-07-22 DAL2544 SLC → OAK Jul 22, 11:47 UTCJul 22, 12:49 UTC1h 2m
2026-07-22 DAL2544 SLC → OAK Jul 22, 11:50 UTCJul 22, 12:50 UTC1h 0m
2026-07-22 DAL1586 DTW → AUS Jul 22, 00:40 UTCJul 22, 01:50 UTC1h 10m
2026-07-21 DAL1623 ATL → SJC Jul 21, 22:25 UTCJul 21, 23:25 UTC1h 0m
2026-07-21 DAL1623 ATL → SJC Jul 21, 19:35 UTCJul 21, 20:40 UTC1h 5m
2026-07-21 DAL1302 BOS → RDU Jul 21, 16:55 UTCJul 21, 18:15 UTC1h 20m
2026-07-21 DAL1302 BOS → RDU Jul 21, 14:20 UTCJul 21, 15:40 UTC1h 20m
2026-07-21 DAL2335 SLC → CVG Jul 21, 12:15 UTCJul 21, 13:12 UTC57m
2026-07-21 DAL2608 MSP → PHL Jul 21, 03:40 UTCJul 21, 04:05 UTC25m
2026-07-21 DAL1260 MCO → LGA Jul 21, 00:20 UTCJul 21, 01:50 UTC1h 30m
2026-07-20 DAL1260 MCO → LGA Jul 20, 21:25 UTCJul 20, 23:05 UTC1h 40m
2026-07-20 DAL2798 EWR → MSP Jul 20, 17:55 UTCJul 20, 19:55 UTC2h 0m
2026-07-20 DAL2798 EWR → MSP Jul 20, 17:50 UTCJul 20, 19:53 UTC2h 3m
2026-07-20 DAL2798 EWR → MSP Jul 20, 14:05 UTCJul 20, 16:20 UTC2h 15m
2026-07-19 DAL2903 - Jul 19, 23:10 UTCJul 20, 01:20 UTC2h 10m
2026-07-19 DAL2903 - Jul 19, 19:50 UTCJul 19, 21:45 UTC1h 55m
2026-07-19 DAL1185 - Jul 19, 15:25 UTCJul 19, 16:50 UTC1h 25m
2026-07-19 DAL1304 DTW → SFO Jul 19, 04:20 UTCJul 19, 05:45 UTC1h 25m
2026-07-19 DAL1277 - Jul 19, 00:15 UTCJul 19, 01:45 UTC1h 30m
2026-07-18 DAL1277 SLC → SNA Jul 18, 21:40 UTCJul 18, 23:05 UTC1h 25m

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 N101DU page for operator, model, and routing details .

Mode-S A008C9 frequently asked

What is Mode-S code A008C9?
A008C9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N101DU.
Where is Mode-S A008C9 registered?
Mode-S code A008C9 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 A008C9 broadcasting right now?
Mode-S A008C9 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 A008C9, octal 50004311, decimal 10,488,009.
What flights does A008C9 operate?
Mode-S A008C9 has broadcast 20 distinct callsigns, including DAL1449, DAL2847, DAL1442, DAL1367, DAL2903.