Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ADBDC9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N985AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
ADBDC9
Octal
53336711
Decimal
11,386,313
Country
US
Tail
N985AT
Type
B712
Transponder active on ground
Flights observed
334
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S ADBDC9.

Country allocation

The ICAO 24-bit address ADBDC9 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
DAL2681 Delta Air Lines 8 2026-05-29
DAL1666 Delta Air Lines 6 2026-05-06
DAL3144 Delta Air Lines 5 2026-05-20
DAL1708 Delta Air Lines 5 2026-05-27
DAL3190 Delta Air Lines 4 2026-05-14
DAL3151 Delta Air Lines 4 2026-05-15
DAL3012 Delta Air Lines 4 2026-05-19
DAL2780 Delta Air Lines 4 2026-05-19
DAL2763 Delta Air Lines 4 2026-05-27
DAL2213 Delta Air Lines 4 2026-04-27
DAL1248 Delta Air Lines 4 2026-05-04
DAL1235 Delta Air Lines 4 2026-05-23
DAL1126 Delta Air Lines 4 2026-05-24
DAL876 Delta Air Lines 3 2026-05-12
DAL512 Delta Air Lines 3 2026-04-14
DAL3202 Delta Air Lines 3 2026-05-08
DAL3121 Delta Air Lines 3 2026-05-25
DAL3101 Delta Air Lines 3 2026-05-08
DAL3096 Delta Air Lines 3 2026-05-08
DAL3063 Delta Air Lines 3 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 DAL2381 STL → DTW May 29, 19:30 UTCMay 29, 21:10 UTC1h 40m
2026-05-29 DAL2681 MSN → ATL May 29, 16:00 UTCMay 29, 17:45 UTC1h 45m
2026-05-29 DAL2681 MSN → ATL May 29, 13:25 UTCMay 29, 15:05 UTC1h 40m
2026-05-29 DAL3017 ATL → GSO May 29, 00:30 UTCMay 29, 01:20 UTC50m
2026-05-29 DAL3017 ATL → GSO May 29, 00:28 UTCMay 29, 01:18 UTC50m
2026-05-28 DAL3017 ATL → GSO May 28, 22:10 UTCMay 28, 22:55 UTC45m
2026-05-28 DAL3142 ATL → BNA May 28, 20:20 UTCMay 28, 21:00 UTC40m
2026-05-28 DAL3142 ATL → BNA May 28, 18:15 UTCMay 28, 19:00 UTC45m
2026-05-28 DAL1286 MCO → LGA May 28, 16:25 UTCMay 28, 17:00 UTC35m
2026-05-28 DAL1286 MCO → LGA May 28, 13:45 UTCMay 28, 14:30 UTC45m
2026-05-28 DAL2853 JAX → DTW May 28, 11:50 UTCMay 28, 12:20 UTC30m
2026-05-27 DAL2015 CUN → DTW May 27, 23:50 UTCMay 28, 00:15 UTC25m
2026-05-27 DAL2763 JFK → FLL May 27, 20:45 UTCMay 27, 22:00 UTC1h 15m
2026-05-27 DAL2763 JFK → FLL May 27, 18:00 UTCMay 27, 19:00 UTC1h 0m
2026-05-27 DAL1708 EWR → MSP May 27, 16:20 UTCMay 27, 16:55 UTC35m
2026-05-27 DAL1708 EWR → MSP May 27, 14:55 UTCMay 27, 15:30 UTC35m
2026-05-27 DAL2727 ATL → EWR May 27, 12:15 UTCMay 27, 13:55 UTC1h 40m
2026-05-27 DAL2727 ATL → EWR May 27, 12:11 UTCMay 27, 13:50 UTC1h 39m
2026-05-27 DAL2306 ATL → DSM May 27, 03:09 UTCMay 27, 04:49 UTC1h 40m
2026-05-27 DAL1132 BOS → ATL May 27, 00:59 UTCMay 27, 01:29 UTC30m
2026-05-26 DAL1132 BOS → ATL May 26, 23:35 UTCMay 27, 00:04 UTC30m
2026-05-26 DAL1067 SEA → AUS May 26, 20:09 UTCMay 26, 20:54 UTC45m
2026-05-26 DAL1067 SEA → AUS May 26, 18:30 UTCMay 26, 19:10 UTC40m
2026-05-26 DAL1182 DFW → BOS May 26, 16:40 UTCMay 26, 17:15 UTC35m
2026-05-26 DAL1182 DFW → BOS May 26, 14:55 UTCMay 26, 15:29 UTC35m
2026-05-26 DAL3009 HSV → ATL May 26, 13:24 UTCMay 26, 13:54 UTC30m
2026-05-26 DAL3022 ATL → HSV May 26, 05:30 UTCMay 26, 06:10 UTC40m
2026-05-26 DAL2086 DSM → ATL May 26, 03:00 UTCMay 26, 04:39 UTC1h 40m
2026-05-26 DAL2086 DSM → ATL May 26, 02:57 UTCMay 26, 04:34 UTC1h 37m
2026-05-26 DAL2086 DSM → ATL May 26, 00:04 UTCMay 26, 01:44 UTC1h 40m
2026-05-25 DAL731 BOS → FLL May 25, 18:50 UTCMay 25, 19:59 UTC1h 9m
2026-05-25 DAL731 BOS → FLL May 25, 16:25 UTCMay 25, 17:15 UTC50m
2026-05-25 DAL3048 - May 25, 14:45 UTCMay 25, 15:20 UTC35m
2026-05-25 DAL3048 - May 25, 12:40 UTCMay 25, 13:15 UTC35m
2026-05-25 DAL2637 BNA → ATL May 25, 10:35 UTCMay 25, 11:10 UTC35m
2026-05-25 DAL3121 ATL → BNA May 25, 03:20 UTCMay 25, 04:05 UTC45m
2026-05-25 DAL3121 ATL → BNA May 25, 03:17 UTCMay 25, 04:02 UTC45m
2026-05-24 DAL1126 PDX → LAX May 24, 23:10 UTCMay 24, 23:46 UTC36m
2026-05-24 DAL1126 PDX → LAX May 24, 20:00 UTCMay 24, 20:50 UTC50m
2026-05-24 DAL1737 PHL → MSP May 24, 18:00 UTCMay 24, 18:25 UTC25m
2026-05-24 DAL1737 PHL → MSP May 24, 17:55 UTCMay 24, 18:22 UTC27m
2026-05-24 DAL1737 PHL → MSP May 24, 16:20 UTCMay 24, 16:50 UTC30m
2026-05-24 DAL1157 ATL → CVG May 24, 13:05 UTCMay 24, 14:50 UTC1h 45m
2026-05-23 DAL2364 ATL → OMA May 23, 22:05 UTCMay 24, 00:00 UTC1h 55m
2026-05-23 DAL82 ATL → CDG May 23, 17:00 UTCMay 23, 17:45 UTC45m
2026-05-23 DAL2937 ATL → CMH May 23, 14:50 UTCMay 23, 15:40 UTC50m
2026-05-23 DAL1396 BOS → ATL May 23, 12:05 UTCMay 23, 13:10 UTC1h 5m
2026-05-23 DAL2083 BDL → ATL May 23, 05:05 UTCMay 23, 06:10 UTC1h 5m
2026-05-23 DAL2083 BDL → ATL May 23, 05:03 UTCMay 23, 06:13 UTC1h 10m
2026-05-23 DAL1235 BOS → AUS May 23, 03:00 UTCMay 23, 03:55 UTC55m

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 N985AT page for operator, model, and routing details .

Mode-S ADBDC9 frequently asked

What is Mode-S code ADBDC9?
ADBDC9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N985AT.
Where is Mode-S ADBDC9 registered?
Mode-S code ADBDC9 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 ADBDC9 broadcasting right now?
Mode-S ADBDC9 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 ADBDC9, octal 53336711, decimal 11,386,313.
What flights does ADBDC9 operate?
Mode-S ADBDC9 has broadcast 20 distinct callsigns, including DAL2681, DAL1666, DAL3144, DAL1708, DAL3190.