Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACE9BA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N931DQ · operated by DELTA AIR LINES INC

Hex
ACE9BA
Octal
53164672
Decimal
11,332,026
Country
US
Tail
N931DQ
Type
B739
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
735
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S ACE9BA.

Country allocation

The ICAO 24-bit address ACE9BA 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
DAL2542 - 36 2026-07-22
DAL2052 - 19 2026-07-18
DAL3126 Delta Air Lines 17 2026-07-24
DAL3035 - 17 2026-07-13
DAL1393 - 15 2026-07-14
DAL2867 Delta Air Lines 14 2026-07-26
DAL3195 - 13 2026-07-08
DAL3069 Delta Air Lines 13 2026-07-21
DAL2952 Delta Air Lines 13 2026-07-23
DAL1481 - 13 2026-07-19
DAL880 Delta Air Lines 12 2026-06-03
DAL2071 Delta Air Lines 12 2026-06-18
DAL3067 Delta Air Lines 11 2026-07-26
DAL2545 Delta Air Lines 11 2026-06-05
DAL2522 - 11 2026-07-04
DAL3129 - 10 2026-07-19
DAL3056 Delta Air Lines 10 2026-07-22
DAL2600 - 10 2026-07-14
DAL3059 Delta Air Lines 9 2026-07-25
DAL3054 Delta Air Lines 9 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL552 LAX → BOS Jul 26, 20:35 UTCJul 26, 21:30 UTC55m
2026-07-26 DAL2867 ATL → EWR Jul 26, 17:55 UTCJul 26, 18:40 UTC45m
2026-07-26 DAL2867 ATL → EWR Jul 26, 17:53 UTCJul 26, 18:33 UTC40m
2026-07-26 DAL2867 ATL → EWR Jul 26, 15:35 UTCJul 26, 16:15 UTC40m
2026-07-26 DAL3067 PNS → ATL Jul 26, 13:15 UTCJul 26, 14:20 UTC1h 5m
2026-07-26 DAL3067 PNS → ATL Jul 26, 13:11 UTCJul 26, 14:01 UTC50m
2026-07-25 DAL3059 PNS → ATL Jul 25, 22:30 UTCJul 25, 23:15 UTC45m
2026-07-25 DAL2026 ATL → PVD Jul 25, 19:50 UTCJul 25, 20:45 UTC55m
2026-07-25 DAL2026 ATL → PVD Jul 25, 17:20 UTCJul 25, 18:15 UTC55m
2026-07-25 DAL3091 ATL → CHS Jul 25, 14:50 UTCJul 25, 15:35 UTC45m
2026-07-25 DAL3091 ATL → CHS Jul 25, 12:40 UTCJul 25, 13:25 UTC45m
2026-07-25 DAL1552 IAH → DTW Jul 25, 09:20 UTCJul 25, 10:15 UTC55m
2026-07-25 DAL1154 SLC → SEA Jul 25, 03:20 UTCJul 25, 04:15 UTC55m
2026-07-24 DAL3126 IND → ATL Jul 24, 23:25 UTCJul 25, 00:30 UTC1h 5m
2026-07-24 DAL3126 IND → ATL Jul 24, 20:35 UTCJul 24, 22:00 UTC1h 25m
2026-07-24 DAL3198 - Jul 24, 17:10 UTCJul 24, 17:55 UTC45m
2026-07-24 DAL3198 ATL → PNS Jul 24, 15:05 UTCJul 24, 15:50 UTC45m
2026-07-24 DAL789 BOS → MSP Jul 24, 12:25 UTCJul 24, 13:10 UTC45m
2026-07-23 DAL2493 ATL → ORD Jul 23, 23:35 UTCJul 24, 00:20 UTC45m
2026-07-23 DAL1148 SNA → SLC Jul 23, 20:15 UTCJul 23, 20:45 UTC30m
2026-07-23 DAL1148 SNA → SLC Jul 23, 18:25 UTCJul 23, 18:55 UTC30m
2026-07-23 DAL2952 ATL → IND Jul 23, 16:00 UTCJul 23, 17:05 UTC1h 5m
2026-07-23 DAL2952 ATL → IND Jul 23, 13:25 UTCJul 23, 14:30 UTC1h 5m
2026-07-23 DAL1547 SAT → DTW Jul 23, 10:25 UTCJul 23, 11:25 UTC1h 0m
2026-07-23 DAL2072 LGA → TPA Jul 23, 02:20 UTCJul 23, 03:20 UTC1h 0m
2026-07-22 DAL3056 ATL → DAB Jul 22, 23:25 UTCJul 23, 00:25 UTC1h 0m
2026-07-22 DAL3056 ATL → DAB Jul 22, 23:23 UTCJul 23, 00:20 UTC57m
2026-07-22 DAL3056 ATL → DAB Jul 22, 21:00 UTCJul 22, 22:00 UTC1h 0m
2026-07-22 DAL2542 MSY → ATL Jul 22, 17:50 UTCJul 22, 18:55 UTC1h 5m
2026-07-22 DAL2542 ATL → MSY Jul 22, 15:15 UTCJul 22, 16:20 UTC1h 5m
2026-07-22 DAL1674 ORD → LGA Jul 22, 13:00 UTCJul 22, 13:45 UTC45m
2026-07-22 DAL1674 ORD → LGA Jul 22, 12:56 UTCJul 22, 13:39 UTC43m
2026-07-21 DAL2494 OAK → SLC Jul 21, 22:50 UTCJul 21, 23:30 UTC40m
2026-07-21 DAL2026 ATL → PVD Jul 21, 19:45 UTCJul 21, 20:40 UTC55m
2026-07-21 DAL2026 ATL → PVD Jul 21, 19:43 UTCJul 21, 20:40 UTC57m
2026-07-21 DAL2026 ATL → PVD Jul 21, 17:15 UTCJul 21, 18:10 UTC55m
2026-07-21 DAL3069 BNA → ATL Jul 21, 15:05 UTCJul 21, 15:40 UTC35m
2026-07-21 DAL3069 BNA → ATL Jul 21, 12:40 UTCJul 21, 13:20 UTC40m
2026-07-21 DAL2124 ATL → BOS Jul 21, 10:25 UTCJul 21, 11:10 UTC45m
2026-07-21 DAL2525 BOS → SFO Jul 21, 02:10 UTCJul 21, 03:10 UTC1h 0m
2026-07-21 DAL2525 BOS → SFO Jul 21, 02:09 UTCJul 21, 03:01 UTC52m
2026-07-20 DAL3056 ATL → DAB Jul 20, 23:25 UTCJul 21, 00:25 UTC59m
2026-07-20 DAL3056 ATL → DAB Jul 20, 21:00 UTCJul 20, 22:05 UTC1h 5m
2026-07-20 DAL2542 MSY → ATL Jul 20, 18:10 UTCJul 20, 19:15 UTC1h 5m
2026-07-20 DAL2542 MSY → ATL Jul 20, 18:08 UTCJul 20, 19:10 UTC1h 2m
2026-07-20 DAL2542 ATL → MSY Jul 20, 15:45 UTCJul 20, 16:45 UTC1h 0m
2026-07-20 DAL3067 - Jul 20, 13:35 UTCJul 20, 14:20 UTC45m
2026-07-20 DAL3067 PNS → ATL Jul 20, 13:33 UTCJul 20, 14:19 UTC46m
2026-07-20 DAL3086 ATL → PNS Jul 20, 03:55 UTCJul 20, 04:45 UTC50m
2026-07-20 DAL3086 ATL → PNS Jul 20, 03:56 UTCJul 20, 04:39 UTC43m

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 N931DQ page for operator, model, and routing details .

Mode-S ACE9BA frequently asked

What is Mode-S code ACE9BA?
ACE9BA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N931DQ.
Where is Mode-S ACE9BA registered?
Mode-S code ACE9BA 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 ACE9BA 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 ACE9BA, octal 53164672, decimal 11,332,026.
What flights does ACE9BA operate?
Mode-S ACE9BA has broadcast 20 distinct callsigns, including DAL2542, DAL2052, DAL3126, DAL3035, DAL1393.