Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
Transponder active on ground
Flights observed
515
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

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
DAL2227 Delta Air Lines 6 2026-07-20
DAL1400 - 6 2026-07-19
DAL2634 - 5 2026-07-15
DAL2611 - 5 2026-07-20
DAL2531 Delta Air Lines 5 2026-07-04
DAL2437 Delta Air Lines 5 2026-04-16
DAL2378 Delta Air Lines 5 2026-07-19
DAL2129 - 5 2026-04-13
DAL1359 - 5 2026-07-15
DAL1244 Delta Air Lines 5 2026-07-25
DAL801 Delta Air Lines 4 2026-06-15
DAL790 Delta Air Lines 4 2026-07-22
DAL787 - 4 2026-07-21
DAL3115 Delta Air Lines 4 2026-05-14
DAL2639 Delta Air Lines 4 2026-07-20
DAL2284 - 4 2026-07-10
DAL2253 Delta Air Lines 4 2026-06-02
DAL1913 Delta Air Lines 4 2026-04-18
DAL1437 Delta Air Lines 4 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2483 SJC → SLC Jul 26, 19:20 UTCJul 26, 21:45 UTC2h 25m
2026-07-26 DAL2482 BOS → CVG Jul 26, 14:15 UTCJul 26, 17:50 UTC3h 35m
2026-07-26 DAL2791 PHL → MSP Jul 26, 10:00 UTCJul 26, 12:25 UTC2h 25m
2026-07-26 DAL2703 MSY → LGA Jul 26, 01:20 UTCJul 26, 03:10 UTC1h 50m
2026-07-25 DAL2483 SJC → SLC Jul 25, 19:45 UTCJul 25, 22:30 UTC2h 45m
2026-07-25 DAL2483 SJC → SLC Jul 25, 19:41 UTCJul 25, 22:24 UTC2h 43m
2026-07-25 DAL2482 BOS → CVG Jul 25, 15:03 UTCJul 25, 18:16 UTC3h 13m
2026-07-25 DAL2482 BOS → CVG Jul 25, 15:05 UTCJul 25, 18:25 UTC3h 20m
2026-07-25 DAL1173 PBI → ATL Jul 25, 03:33 UTCJul 25, 05:38 UTC2h 5m
2026-07-25 DAL1173 PBI → ATL Jul 25, 03:35 UTCJul 25, 05:35 UTC2h 0m
2026-07-25 DAL1244 LGA → ORD Jul 25, 00:25 UTCJul 25, 01:50 UTC1h 25m
2026-07-25 DAL1244 LGA → ORD Jul 25, 00:22 UTCJul 25, 01:55 UTC1h 33m
2026-07-24 DAL1244 LGA → ORD Jul 24, 21:30 UTCJul 24, 22:55 UTC1h 25m
2026-07-24 DAL935 DTW → SLC Jul 24, 16:40 UTCJul 24, 20:00 UTC3h 20m
2026-07-24 DAL808 JFK → LAX Jul 24, 12:30 UTCJul 24, 14:40 UTC2h 10m
2026-07-24 DAL1355 MSP → LGA Jul 24, 00:15 UTCJul 24, 02:20 UTC2h 5m
2026-07-23 DAL2324 GSO → ATL Jul 23, 17:00 UTCJul 23, 20:30 UTC3h 30m
2026-07-23 DAL966 GEG → ATL Jul 23, 10:55 UTCJul 23, 15:20 UTC4h 25m
2026-07-22 DAL3119 ATL → CVG Jul 22, 22:10 UTCJul 22, 23:05 UTC55m
2026-07-22 DAL1082 LGA → DTW Jul 22, 18:35 UTCJul 22, 20:35 UTC2h 0m
2026-07-22 DAL1082 LGA → DTW Jul 22, 14:35 UTCJul 22, 16:25 UTC1h 50m
2026-07-22 DAL3001 BNA → ATL Jul 22, 11:30 UTCJul 22, 12:10 UTC40m
2026-07-22 DAL790 ATL → LGA Jul 22, 04:25 UTCJul 22, 05:20 UTC55m
2026-07-22 DAL790 ATL → LGA Jul 22, 04:21 UTCJul 22, 05:11 UTC50m
2026-07-21 DAL787 GEG → ATL Jul 21, 20:05 UTCJul 21, 23:50 UTC3h 45m
2026-07-21 DAL787 ATL → GEG Jul 21, 14:15 UTCJul 21, 18:30 UTC4h 15m
2026-07-21 DAL1610 - Jul 21, 11:50 UTCJul 21, 12:45 UTC55m
2026-07-20 DAL2831 ATL → SDF Jul 20, 22:22 UTCJul 20, 23:17 UTC55m
2026-07-20 DAL2831 ATL → SDF Jul 20, 22:25 UTCJul 20, 23:20 UTC55m
2026-07-20 DAL1437 BOS → ATL Jul 20, 19:45 UTCJul 20, 20:55 UTC1h 10m
2026-07-20 DAL1437 BOS → ATL Jul 20, 16:55 UTCJul 20, 18:05 UTC1h 10m
2026-07-20 DAL2227 JFK → ATL Jul 20, 13:21 UTCJul 20, 15:05 UTC1h 44m
2026-07-20 DAL2227 JFK → ATL Jul 20, 13:20 UTCJul 20, 15:05 UTC1h 45m
2026-07-20 DAL2611 BOS → JFK Jul 20, 10:28 UTCJul 20, 11:14 UTC46m
2026-07-20 DAL2611 BOS → JFK Jul 20, 10:30 UTCJul 20, 11:15 UTC45m
2026-07-20 DAL2639 EWR → ATL Jul 20, 03:40 UTCJul 20, 04:20 UTC40m
2026-07-19 DAL2378 SMF → SEA Jul 19, 23:20 UTCJul 20, 01:35 UTC2h 15m
2026-07-19 DAL1400 AGS → ATL Jul 19, 20:10 UTCJul 19, 20:45 UTC35m
2026-07-19 DAL1400 STL → AGS Jul 19, 17:00 UTCJul 19, 18:55 UTC1h 55m
2026-07-19 DAL1400 ATL → STL Jul 19, 13:15 UTCJul 19, 14:25 UTC1h 10m
2026-07-19 DAL1146 LGA → MSP Jul 19, 11:05 UTCJul 19, 11:30 UTC25m
2026-07-18 DAL1021 - Jul 18, 22:15 UTCJul 18, 22:45 UTC30m
2026-07-18 DAL2710 LGA → IAH Jul 18, 18:20 UTCJul 18, 20:10 UTC1h 50m
2026-07-18 DAL2710 LGA → IAH Jul 18, 18:20 UTCJul 18, 20:05 UTC1h 45m
2026-07-18 DAL2883 ATL → YYZ Jul 18, 14:50 UTCJul 18, 16:40 UTC1h 50m
2026-07-18 DAL2453 - Jul 18, 11:35 UTCJul 18, 13:10 UTC1h 35m
2026-07-18 DAL2865 ATL → GRR Jul 18, 02:29 UTCJul 18, 03:55 UTC1h 26m
2026-07-17 DAL809 SJC → ATL Jul 17, 19:45 UTCJul 18, 00:15 UTC4h 30m
2026-07-17 DAL809 SJC → ATL Jul 17, 14:04 UTCJul 17, 18:15 UTC4h 10m
2026-07-17 DAL1610 - Jul 17, 11:15 UTCJul 17, 12:10 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 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?
Mode-S ACF89F 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 ACF89F, octal 53174237, decimal 11,335,839.
What flights does ACF89F operate?
Mode-S ACF89F has broadcast 20 distinct callsigns, including DAL1151, DAL2227, DAL1400, DAL2634, DAL2611.