Apparatus

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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
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
715
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

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
DAL3190 - 11 2026-06-29
DAL3050 Delta Air Lines 11 2026-07-23
DAL2681 - 10 2026-07-21
DAL1737 - 10 2026-07-07
DAL2220 - 9 2026-07-15
DAL731 - 8 2026-06-24
DAL3133 - 8 2026-07-15
DAL2763 Delta Air Lines 8 2026-07-24
DAL1666 - 8 2026-06-21
DAL1186 Delta Air Lines 8 2026-07-21
DAL1010 - 8 2026-06-21
DAL512 - 7 2026-06-20
DAL3057 Delta Air Lines 7 2026-06-29
DAL2539 - 7 2026-07-06
DAL1708 Delta Air Lines 7 2026-06-20
DAL1248 Delta Air Lines 7 2026-07-25
DAL1126 Delta Air Lines 7 2026-07-25
DAL516 Delta Air Lines 6 2026-07-24
DAL3063 - 6 2026-06-15
DAL3051 - 6 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2862 ATL → OKC Jul 26, 19:50 UTCJul 26, 21:30 UTC1h 40m
2026-07-26 DAL1649 - Jul 26, 16:25 UTCJul 26, 18:10 UTC1h 45m
2026-07-26 DAL1649 TVC → ATL Jul 26, 16:18 UTCJul 26, 18:04 UTC1h 46m
2026-07-26 DAL1649 - Jul 26, 13:10 UTCJul 26, 14:55 UTC1h 45m
2026-07-26 DAL3181 GNV → ATL Jul 26, 10:40 UTCJul 26, 11:25 UTC45m
2026-07-26 DAL3079 ATL → GNV Jul 26, 01:10 UTCJul 26, 02:00 UTC50m
2026-07-25 DAL1126 PDX → LAX Jul 25, 22:05 UTCJul 25, 23:00 UTC55m
2026-07-25 DAL1126 PDX → LAX Jul 25, 22:01 UTCJul 25, 22:59 UTC58m
2026-07-25 DAL1126 PDX → LAX Jul 25, 20:00 UTCJul 25, 20:55 UTC55m
2026-07-25 DAL1248 DTW → MCO Jul 25, 16:40 UTCJul 25, 18:10 UTC1h 30m
2026-07-25 DAL1248 DTW → MCO Jul 25, 16:38 UTCJul 25, 18:04 UTC1h 26m
2026-07-25 DAL1248 DTW → MCO Jul 25, 14:10 UTCJul 25, 15:35 UTC1h 25m
2026-07-25 DAL1624 SAN → MSP Jul 25, 11:45 UTCJul 25, 12:50 UTC1h 5m
2026-07-25 DAL1624 SAN → MSP Jul 25, 11:42 UTCJul 25, 12:51 UTC1h 9m
2026-07-25 DAL2384 GEG → SEA Jul 25, 00:25 UTCJul 25, 01:30 UTC1h 5m
2026-07-24 DAL2763 JFK → FLL Jul 24, 21:55 UTCJul 24, 23:10 UTC1h 15m
2026-07-24 DAL2763 JFK → FLL Jul 24, 19:10 UTCJul 24, 20:30 UTC1h 20m
2026-07-24 DAL2158 OAK → SLC Jul 24, 16:40 UTCJul 24, 17:15 UTC35m
2026-07-24 DAL2158 OAK → SLC Jul 24, 16:38 UTCJul 24, 17:11 UTC33m
2026-07-24 DAL2158 OAK → SLC Jul 24, 15:10 UTCJul 24, 15:40 UTC30m
2026-07-24 DAL516 LAX → JFK Jul 24, 11:20 UTCJul 24, 13:10 UTC1h 50m
2026-07-24 DAL1104 JFK → LAS Jul 24, 01:25 UTCJul 24, 03:05 UTC1h 40m
2026-07-23 DAL3050 ATL → GSO Jul 23, 22:50 UTCJul 23, 23:40 UTC50m
2026-07-23 DAL3050 ATL → GSO Jul 23, 22:47 UTCJul 23, 23:38 UTC51m
2026-07-23 DAL3050 ATL → GSO Jul 23, 20:50 UTCJul 23, 21:45 UTC55m
2026-07-23 DAL304 SNA → DTW Jul 23, 17:50 UTCJul 23, 19:25 UTC1h 35m
2026-07-23 DAL304 SNA → DTW Jul 23, 14:50 UTCJul 23, 16:40 UTC1h 50m
2026-07-23 DAL516 LAX → JFK Jul 23, 11:20 UTCJul 23, 13:05 UTC1h 45m
2026-07-23 DAL1104 JFK → LAS Jul 23, 01:25 UTCJul 23, 02:55 UTC1h 30m
2026-07-23 DAL1104 JFK → LAS Jul 23, 01:24 UTCJul 23, 02:55 UTC1h 31m
2026-07-22 DAL1292 - Jul 22, 23:00 UTCJul 23, 00:00 UTC1h 0m
2026-07-22 DAL1292 ILM → ATL Jul 22, 22:53 UTCJul 22, 23:56 UTC1h 3m
2026-07-22 DAL1292 - Jul 22, 20:50 UTCJul 22, 21:45 UTC55m
2026-07-22 DAL2417 MSY → MSP Jul 22, 18:10 UTCJul 22, 19:30 UTC1h 20m
2026-07-22 DAL2417 MSY → MSP Jul 22, 15:35 UTCJul 22, 17:05 UTC1h 30m
2026-07-22 DAL2250 RDU → ATL Jul 22, 13:45 UTCJul 22, 14:25 UTC40m
2026-07-22 DAL2250 RDU → ATL Jul 22, 11:45 UTCJul 22, 12:25 UTC40m
2026-07-22 DAL2132 RDU → LGA Jul 22, 01:00 UTCJul 22, 01:35 UTC35m
2026-07-21 DAL1186 MSP → BOS Jul 21, 21:50 UTCJul 21, 23:15 UTC1h 25m
2026-07-21 DAL1186 MSP → BOS Jul 21, 19:05 UTCJul 21, 20:35 UTC1h 30m
2026-07-21 DAL2681 - Jul 21, 16:10 UTCJul 21, 17:45 UTC1h 35m
2026-07-21 DAL2681 - Jul 21, 13:25 UTCJul 21, 15:05 UTC1h 40m
2026-07-20 DAL1727 - Jul 20, 13:25 UTCJul 20, 14:05 UTC40m
2026-07-20 DAL1569 - Jul 20, 02:35 UTCJul 20, 03:15 UTC40m
2026-07-20 DAL1569 ATL → TLH Jul 20, 02:35 UTCJul 20, 03:13 UTC38m
2026-07-20 DAL3088 ATL → DAY Jul 20, 00:00 UTCJul 20, 01:10 UTC1h 10m
2026-07-19 DAL3088 ATL → DAY Jul 19, 23:58 UTCJul 20, 01:07 UTC1h 9m
2026-07-19 DAL3088 ATL → DAY Jul 19, 22:10 UTCJul 19, 23:10 UTC1h 0m
2026-07-17 DAL304 ABE → ATL Jul 17, 17:35 UTCJul 17, 19:30 UTC1h 55m
2026-07-17 DAL304 ATL → ABE Jul 17, 14:30 UTCJul 17, 16:10 UTC1h 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 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?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
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 DAL3190, DAL3050, DAL2681, DAL1737, DAL2220.