Apparatus

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sensors Mode-S transponder

ACF89F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N935DZ · operated by DELTA AIR LINES INC

Hex
ACF89F
Octal
53174237
Decimal
11,335,839
Country
US
Tail
N935DZ
Type
B739
No current signal · last broadcast 7h ago
Flights observed
446
Distinct callsigns
20
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S ACF89F.

Country allocation

The ICAO 24-bit address ACF89F 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
DAL1151 Delta Air Lines 7 2026-05-31
DAL2531 Delta Air Lines 5 2026-07-04
DAL2437 Delta Air Lines 5 2026-04-16
DAL2129 - 5 2026-04-13
DAL801 Delta Air Lines 4 2026-06-15
DAL3115 Delta Air Lines 4 2026-05-14
DAL2284 - 4 2026-07-10
DAL2253 Delta Air Lines 4 2026-06-02
DAL1913 Delta Air Lines 4 2026-04-18
DAL1350 Delta Air Lines 4 2026-06-13
DAL841 - 3 2026-06-24
DAL772 Delta Air Lines 3 2026-05-20
DAL769 - 3 2026-04-14
DAL539 Delta Air Lines 3 2026-06-25
DAL2946 - 3 2026-04-15
DAL2908 Delta Air Lines 3 2026-06-11
DAL2905 - 3 2026-06-30
DAL2867 Delta Air Lines 3 2026-06-04
DAL2757 - 3 2026-04-13
DAL2700 Delta Air Lines 3 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL3082 ATL → LEX Jul 14, 01:05 UTCJul 14, 01:55 UTC50m
2026-07-13 DAL1002 - Jul 13, 20:45 UTCJul 13, 23:20 UTC2h 35m
2026-07-13 DAL1002 - Jul 13, 16:30 UTCJul 13, 18:55 UTC2h 25m
2026-07-13 DAL2426 - Jul 13, 13:15 UTCJul 13, 14:40 UTC1h 25m
2026-07-13 DAL1199 ATL → ORD Jul 13, 03:40 UTCJul 13, 05:10 UTC1h 30m
2026-07-13 DAL1199 ATL → ORD Jul 13, 03:39 UTCJul 13, 05:07 UTC1h 28m
2026-07-13 DAL2720 - Jul 13, 00:35 UTCJul 13, 01:25 UTC50m
2026-07-12 DAL2720 - Jul 12, 21:25 UTCJul 12, 22:15 UTC50m
2026-07-12 DAL741 SMF → ATL Jul 12, 13:45 UTCJul 12, 17:50 UTC4h 5m
2026-07-12 DAL574 MSP → SMF Jul 12, 01:00 UTCJul 12, 04:15 UTC3h 15m
2026-07-12 DAL574 MSP → SMF Jul 12, 00:59 UTCJul 12, 04:07 UTC3h 8m
2026-07-11 DAL630 LAS → MSP Jul 11, 16:40 UTCJul 11, 19:15 UTC2h 35m
2026-07-11 DAL2261 MSP → LAS Jul 11, 12:15 UTCJul 11, 14:55 UTC2h 40m
2026-07-11 DAL1542 LAS → MSP Jul 11, 00:40 UTCJul 11, 03:15 UTC2h 35m
2026-07-10 DAL1542 MSP → LAS Jul 10, 20:05 UTCJul 10, 22:55 UTC2h 50m
2026-07-10 DAL1730 MCO → MSP Jul 10, 15:35 UTCJul 10, 18:30 UTC2h 55m
2026-07-10 DAL1730 MSP → MCO Jul 10, 11:10 UTCJul 10, 13:50 UTC2h 40m
2026-07-10 DAL2284 PHX → MSP Jul 10, 00:20 UTCJul 10, 03:10 UTC2h 50m
2026-07-09 DAL2284 - Jul 9, 20:10 UTCJul 9, 23:00 UTC2h 50m
2026-07-09 DAL1766 MSP → ATL Jul 9, 16:10 UTCJul 9, 18:45 UTC2h 35m
2026-07-09 DAL1766 MSP → ATL Jul 9, 16:03 UTCJul 9, 18:43 UTC2h 40m
2026-07-09 DAL1766 MSP → ATL Jul 9, 12:15 UTCJul 9, 14:25 UTC2h 10m
2026-07-09 DAL1173 SLC → MSP Jul 9, 03:45 UTCJul 9, 05:40 UTC1h 55m
2026-07-09 DAL1244 PDX → SLC Jul 9, 00:25 UTCJul 9, 01:55 UTC1h 30m
2026-07-08 DAL1244 SLC → PDX Jul 8, 21:25 UTCJul 8, 22:50 UTC1h 25m
2026-07-08 DAL935 ARB → SLC Jul 8, 16:45 UTCJul 8, 20:05 UTC3h 20m
2026-07-08 DAL808 TPA → DTW Jul 8, 12:55 UTCJul 8, 14:55 UTC2h 0m
2026-07-07 DAL2433 LGA → TPA Jul 7, 23:30 UTCJul 8, 01:55 UTC2h 25m
2026-07-07 DAL2195 - Jul 7, 18:55 UTCJul 7, 21:05 UTC2h 10m
2026-07-07 DAL2195 LGA → TPA Jul 7, 14:55 UTCJul 7, 17:30 UTC2h 35m
2026-07-07 DAL2387 - Jul 7, 10:45 UTCJul 7, 13:05 UTC2h 20m
2026-07-07 DAL2382 LGA → MIA Jul 7, 00:55 UTCJul 7, 03:30 UTC2h 35m
2026-07-06 DAL1538 - Jul 6, 20:55 UTCJul 6, 23:20 UTC2h 25m
2026-07-06 DAL1538 LGA → MIA Jul 6, 15:55 UTCJul 6, 18:35 UTC2h 40m
2026-07-06 DAL2532 - Jul 6, 11:30 UTCJul 6, 13:45 UTC2h 15m
2026-07-05 DAL2410 LGA → PBI Jul 5, 23:53 UTCJul 6, 02:05 UTC2h 12m
2026-07-05 DAL2410 - Jul 5, 23:55 UTCJul 6, 02:05 UTC2h 10m
2026-07-05 DAL2396 - Jul 5, 19:45 UTCJul 5, 22:25 UTC2h 40m
2026-07-05 DAL2396 - Jul 5, 15:35 UTCJul 5, 17:45 UTC2h 10m
2026-07-04 DAL2531 MSN → MSP Jul 4, 20:15 UTCJul 4, 23:15 UTC3h 0m
2026-07-04 DAL2531 MSN → MSP Jul 4, 16:35 UTCJul 4, 19:00 UTC2h 25m
2026-07-04 DAL368 - Jul 4, 02:45 UTCJul 4, 03:45 UTC1h 0m
2026-07-03 DAL368 - Jul 3, 21:25 UTCJul 4, 00:15 UTC2h 50m
2026-07-03 DAL2261 ATL → BDL Jul 3, 16:45 UTCJul 3, 19:15 UTC2h 30m
2026-07-03 DAL2261 ATL → BDL Jul 3, 12:15 UTCJul 3, 15:15 UTC3h 0m
2026-07-03 DAL2284 ATL → LAX Jul 3, 01:05 UTCJul 3, 03:45 UTC2h 40m
2026-07-02 DAL2284 ATL → LAX Jul 2, 20:45 UTCJul 2, 23:40 UTC2h 55m
2026-07-02 DAL536 SEA → MSP Jul 2, 16:20 UTCJul 2, 19:10 UTC2h 50m
2026-07-02 DAL814 - Jul 2, 10:15 UTCJul 2, 14:35 UTC4h 20m
2026-07-02 DAL814 DTW → SEA Jul 2, 10:10 UTCJul 2, 14:31 UTC4h 21m

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 N935DZ page for operator, model, and routing details .

Mode-S ACF89F frequently asked

What is Mode-S code ACF89F?
ACF89F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N935DZ.
Where is Mode-S ACF89F registered?
Mode-S code ACF89F 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 ACF89F broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACF89F, octal 53174237, decimal 11,335,839.
What flights does ACF89F operate?
Mode-S ACF89F has broadcast 20 distinct callsigns, including DAL1151, DAL2531, DAL2437, DAL2129, DAL801.