Apparatus

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sensors Mode-S transponder

AB09B4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N810DN · BOEING 737-900 · operated by DELTA AIR LINES INC

Hex
AB09B4
Octal
52604664
Decimal
11,209,140
Country
US
Tail
N810DN
Type
B739
No current signal · last broadcast Jul 26, 21:55 UTC
Flights observed
475
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:55 UTC

Last known position

Most recent position reported by Mode-S AB09B4.

Country allocation

The ICAO 24-bit address AB09B4 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
DAL2843 Delta Air Lines 7 2026-07-24
DAL578 Delta Air Lines 6 2026-05-11
DAL2377 Delta Air Lines 5 2026-04-18
DAL2323 - 5 2026-06-29
DAL2129 - 5 2026-07-07
DAL986 - 4 2026-07-12
DAL944 Delta Air Lines 4 2026-04-16
DAL305 - 4 2026-07-08
DAL2757 - 4 2026-07-16
DAL2437 - 4 2026-07-20
DAL2400 - 4 2026-07-05
DAL2302 Delta Air Lines 4 2026-07-22
DAL2229 Delta Air Lines 4 2026-07-24
DAL2195 - 4 2026-07-17
DAL1964 - 4 2026-07-10
DAL1947 - 4 2026-06-20
DAL1911 Delta Air Lines 4 2026-05-11
DAL1817 Delta Air Lines 4 2026-04-30
DAL1783 Delta Air Lines 4 2026-04-30
DAL1757 Delta Air Lines 4 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2500 ATL → CVG Jul 26, 19:30 UTCJul 26, 21:55 UTC2h 25m
2026-07-26 DAL732 DTW → LAS Jul 26, 15:25 UTCJul 26, 17:40 UTC2h 15m
2026-07-26 DAL732 DTW → LAS Jul 26, 15:22 UTCJul 26, 17:35 UTC2h 13m
2026-07-26 DAL2531 MSN → MSP Jul 26, 11:20 UTCJul 26, 13:35 UTC2h 15m
2026-07-25 DAL368 MEX → ATL Jul 25, 23:30 UTCJul 26, 01:35 UTC2h 5m
2026-07-25 DAL2415 SLC → SFO Jul 25, 19:00 UTCJul 25, 21:40 UTC2h 40m
2026-07-25 DAL2415 SLC → SFO Jul 25, 14:15 UTCJul 25, 17:30 UTC3h 15m
2026-07-25 DAL2872 JFK → MCO Jul 25, 10:35 UTCJul 25, 12:50 UTC2h 15m
2026-07-25 DAL2918 ORD → BOS Jul 25, 01:15 UTCJul 25, 03:05 UTC1h 50m
2026-07-24 DAL2843 LAS → SEA Jul 24, 21:15 UTCJul 24, 23:00 UTC1h 45m
2026-07-24 DAL2843 LAS → SEA Jul 24, 18:00 UTCJul 24, 19:35 UTC1h 35m
2026-07-24 DAL2229 JFK → SFO Jul 24, 13:20 UTCJul 24, 16:15 UTC2h 55m
2026-07-24 DAL682 ATL → SMF Jul 24, 01:20 UTCJul 24, 05:40 UTC4h 20m
2026-07-23 DAL2484 ATL → BHM Jul 23, 22:45 UTCJul 23, 23:20 UTC35m
2026-07-23 DAL2484 ATL → BHM Jul 23, 22:44 UTCJul 23, 23:25 UTC41m
2026-07-23 DAL2484 ATL → BHM Jul 23, 20:35 UTCJul 23, 21:00 UTC25m
2026-07-23 DAL3013 ATL → IND Jul 23, 17:50 UTCJul 23, 19:00 UTC1h 10m
2026-07-23 DAL3013 ATL → IND Jul 23, 15:25 UTCJul 23, 16:30 UTC1h 5m
2026-07-23 DAL3165 ATL → SDF Jul 23, 12:25 UTCJul 23, 13:30 UTC1h 5m
2026-07-22 DAL2786 LGA → DTW Jul 22, 21:45 UTCJul 22, 22:55 UTC1h 10m
2026-07-22 DAL2710 LGA → IAH Jul 22, 17:55 UTCJul 22, 19:45 UTC1h 50m
2026-07-22 DAL2883 ATL → YYZ Jul 22, 14:20 UTCJul 22, 16:10 UTC1h 50m
2026-07-22 DAL2883 ATL → YYZ Jul 22, 14:20 UTCJul 22, 16:00 UTC1h 40m
2026-07-22 DAL2302 ATL → MSY Jul 22, 11:20 UTCJul 22, 12:30 UTC1h 10m
2026-07-22 DAL2248 MCO → BOS Jul 22, 00:30 UTCJul 22, 02:10 UTC1h 40m
2026-07-21 DAL1804 GDL → ATL Jul 21, 19:40 UTCJul 21, 22:20 UTC2h 40m
2026-07-21 DAL1992 ATL → GDL Jul 21, 14:16 UTCJul 21, 17:13 UTC2h 57m
2026-07-21 DAL1992 ATL → GDL Jul 21, 14:20 UTCJul 21, 16:35 UTC2h 15m
2026-07-21 DAL3001 BNA → ATL Jul 21, 11:25 UTCJul 21, 12:05 UTC40m
2026-07-21 DAL1144 MSP → GEG Jul 21, 01:40 UTCJul 21, 03:15 UTC1h 35m
2026-07-21 DAL1144 MSP → GEG Jul 21, 01:35 UTCJul 21, 03:12 UTC1h 37m
2026-07-20 DAL2437 GEG → MSP Jul 20, 21:40 UTCJul 20, 23:50 UTC2h 10m
2026-07-20 DAL2437 MSP → GEG Jul 20, 17:25 UTCJul 20, 20:20 UTC2h 55m
2026-07-20 DAL2369 ATL → BNA Jul 20, 13:10 UTCJul 20, 15:50 UTC2h 40m
2026-07-19 DAL503 BOS → ATL Jul 19, 23:00 UTCJul 20, 03:30 UTC4h 30m
2026-07-19 DAL640 DTW → SAN Jul 19, 15:25 UTCJul 19, 19:00 UTC3h 35m
2026-07-19 DAL640 DTW → SAN Jul 19, 15:25 UTCJul 19, 20:37 UTC5h 12m
2026-07-18 DAL442 LAX → SFO Jul 18, 20:35 UTCJul 19, 00:55 UTC4h 20m
2026-07-18 DAL442 LAX → SFO Jul 18, 20:31 UTCJul 19, 00:55 UTC4h 24m
2026-07-18 DAL808 TPA → DTW Jul 18, 13:40 UTCJul 18, 15:45 UTC2h 5m
2026-07-17 DAL2433 LGA → TPA Jul 17, 23:45 UTCJul 18, 02:05 UTC2h 20m
2026-07-17 DAL2195 TPA → LGA Jul 17, 20:04 UTCJul 17, 22:25 UTC2h 20m
2026-07-17 DAL2195 LGA → TPA Jul 17, 15:05 UTCJul 17, 17:20 UTC2h 15m
2026-07-17 DAL2387 - Jul 17, 10:55 UTCJul 17, 13:20 UTC2h 25m
2026-07-17 DAL2187 JFK → MCO Jul 17, 00:14 UTCJul 17, 03:20 UTC3h 5m
2026-07-16 DAL2483 YVR → MSP Jul 16, 19:20 UTCJul 16, 22:05 UTC2h 45m
2026-07-16 DAL2482 MSP → YVR Jul 16, 14:20 UTCJul 16, 17:35 UTC3h 15m
2026-07-16 DAL2757 - Jul 16, 11:10 UTCJul 16, 12:30 UTC1h 20m
2026-07-16 DAL2757 IND → MSP Jul 16, 11:08 UTCJul 16, 12:27 UTC1h 19m
2026-07-16 DAL674 MSP → IND Jul 16, 02:50 UTCJul 16, 04:00 UTC1h 10m

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 N810DN page for operator, model, and routing details .

Mode-S AB09B4 frequently asked

What is Mode-S code AB09B4?
AB09B4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N810DN.
Where is Mode-S AB09B4 registered?
Mode-S code AB09B4 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 AB09B4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB09B4, octal 52604664, decimal 11,209,140.
What flights does AB09B4 operate?
Mode-S AB09B4 has broadcast 20 distinct callsigns, including DAL2843, DAL578, DAL2377, DAL2323, DAL2129.