Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACF84E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N935AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
ACF84E
Octal
53174116
Decimal
11,335,758
Country
US
Tail
N935AT
Type
B712
No current signal · last broadcast Jul 26, 20:50 UTC
Flights observed
566
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:50 UTC

Last known position

Most recent position reported by Mode-S ACF84E.

Country allocation

The ICAO 24-bit address ACF84E 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
DAL2364 Delta Air Lines 10 2026-06-26
DAL3036 Delta Air Lines 8 2026-07-21
DAL3118 - 7 2026-07-19
DAL2793 - 7 2026-06-16
DAL2754 - 7 2026-07-16
DAL2681 - 7 2026-07-02
DAL1017 - 7 2026-07-05
DAL3092 - 6 2026-06-19
DAL3011 - 6 2026-06-28
DAL2780 Delta Air Lines 6 2026-07-26
DAL2763 Delta Air Lines 6 2026-07-19
DAL2250 - 6 2026-06-22
DAL2184 - 6 2026-07-16
DAL2157 Delta Air Lines 6 2026-06-16
DAL2048 - 6 2026-06-17
DAL1737 Delta Air Lines 6 2026-07-21
DAL1716 Delta Air Lines 6 2026-07-09
DAL1115 - 6 2026-06-26
DAL1021 Delta Air Lines 6 2026-07-24
DAL376 - 5 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL3094 - Jul 26, 20:10 UTCJul 26, 20:50 UTC40m
2026-07-26 DAL3151 ATL → JAN Jul 26, 18:05 UTCJul 26, 18:50 UTC45m
2026-07-26 DAL3151 ATL → JAN Jul 26, 15:55 UTCJul 26, 16:35 UTC40m
2026-07-26 DAL3077 ATL → AVL Jul 26, 14:15 UTCJul 26, 14:50 UTC35m
2026-07-26 DAL3077 ATL → AVL Jul 26, 14:14 UTCJul 26, 14:47 UTC33m
2026-07-26 DAL3077 ATL → AVL Jul 26, 12:30 UTCJul 26, 13:05 UTC35m
2026-07-26 DAL2637 BNA → ATL Jul 26, 10:20 UTCJul 26, 11:00 UTC40m
2026-07-26 DAL3121 ATL → BNA Jul 26, 03:05 UTCJul 26, 03:45 UTC40m
2026-07-26 DAL2780 LGA → MIA Jul 26, 00:05 UTCJul 26, 01:45 UTC1h 40m
2026-07-25 DAL2780 LGA → MIA Jul 25, 21:25 UTCJul 25, 23:10 UTC1h 45m
2026-07-25 DAL1687 SEA → ONT Jul 25, 18:30 UTCJul 25, 20:10 UTC1h 40m
2026-07-25 DAL1687 SEA → ONT Jul 25, 18:29 UTCJul 25, 20:05 UTC1h 36m
2026-07-25 DAL1687 SEA → ONT Jul 25, 16:00 UTCJul 25, 17:00 UTC1h 0m
2026-07-25 DAL1722 DTW → ATL Jul 25, 12:20 UTCJul 25, 13:00 UTC40m
2026-07-25 DAL1722 DTW → ATL Jul 25, 12:15 UTCJul 25, 13:07 UTC52m
2026-07-24 DAL2241 - Jul 24, 23:55 UTCJul 25, 00:25 UTC30m
2026-07-24 DAL2037 TPA → BOS Jul 24, 22:10 UTCJul 24, 22:40 UTC30m
2026-07-24 DAL2037 TPA → BOS Jul 24, 22:08 UTCJul 24, 22:37 UTC29m
2026-07-24 DAL2037 TPA → BOS Jul 24, 20:30 UTCJul 24, 21:05 UTC35m
2026-07-24 DAL1637 ATL → MSP Jul 24, 16:35 UTCJul 24, 19:05 UTC2h 30m
2026-07-24 DAL1637 ATL → MSP Jul 24, 13:45 UTCJul 24, 15:30 UTC1h 45m
2026-07-24 DAL1255 TPA → SLC Jul 24, 10:10 UTCJul 24, 11:35 UTC1h 25m
2026-07-24 DAL1283 YWG → MSP Jul 24, 03:55 UTCJul 24, 04:10 UTC15m
2026-07-24 DAL1283 YWG → MSP Jul 24, 02:26 UTCJul 24, 03:39 UTC1h 13m
2026-07-24 DAL1283 YWG → MSP Jul 24, 02:30 UTCJul 24, 04:10 UTC1h 40m
2026-07-24 DAL1021 LAX → SEA Jul 24, 00:05 UTCJul 24, 00:40 UTC35m
2026-07-23 DAL1021 LAX → SEA Jul 23, 22:45 UTCJul 23, 23:15 UTC30m
2026-07-23 DAL3159 ATL → BNA Jul 23, 20:35 UTCJul 23, 21:15 UTC40m
2026-07-23 DAL3159 ATL → BNA Jul 23, 18:25 UTCJul 23, 19:05 UTC40m
2026-07-23 DAL1155 ATL → BNA Jul 23, 16:30 UTCJul 23, 17:10 UTC40m
2026-07-23 DAL1155 ATL → BNA Jul 23, 14:25 UTCJul 23, 15:05 UTC40m
2026-07-23 DAL1680 IAH → LGA Jul 23, 11:10 UTCJul 23, 12:30 UTC1h 20m
2026-07-23 DAL1680 IAH → LGA Jul 23, 11:05 UTCJul 23, 12:23 UTC1h 18m
2026-07-23 DAL1105 JFK → SFO Jul 23, 01:30 UTCJul 23, 02:45 UTC1h 15m
2026-07-23 DAL1105 JFK → SFO Jul 23, 01:26 UTCJul 23, 02:45 UTC1h 19m
2026-07-22 DAL3094 - Jul 22, 22:00 UTCJul 22, 22:45 UTC45m
2026-07-22 DAL3094 - Jul 22, 20:10 UTCJul 22, 20:50 UTC40m
2026-07-22 DAL3151 - Jul 22, 18:10 UTCJul 22, 18:55 UTC45m
2026-07-22 DAL3151 - Jul 22, 16:05 UTCJul 22, 16:40 UTC35m
2026-07-22 DAL2563 - Jul 22, 14:20 UTCJul 22, 15:05 UTC45m
2026-07-22 DAL2563 - Jul 22, 12:40 UTCJul 22, 13:20 UTC40m
2026-07-21 DAL2862 ATL → OKC Jul 21, 22:10 UTCJul 21, 23:50 UTC1h 40m
2026-07-21 DAL2862 ATL → OKC Jul 21, 19:25 UTCJul 21, 21:05 UTC1h 40m
2026-07-21 DAL1737 PHL → MSP Jul 21, 17:10 UTCJul 21, 17:35 UTC25m
2026-07-21 DAL1737 PHL → MSP Jul 21, 17:06 UTCJul 21, 17:32 UTC26m
2026-07-21 DAL1737 PHL → MSP Jul 21, 15:40 UTCJul 21, 16:05 UTC25m
2026-07-21 DAL3036 HSV → ATL Jul 21, 13:55 UTCJul 21, 14:25 UTC30m
2026-07-21 DAL3036 HSV → ATL Jul 21, 13:53 UTCJul 21, 14:22 UTC29m
2026-07-21 DAL3036 HSV → ATL Jul 21, 12:10 UTCJul 21, 12:45 UTC35m
2026-07-21 DAL1044 TPA → ATL Jul 21, 10:00 UTCJul 21, 10:25 UTC25m

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 N935AT page for operator, model, and routing details .

Mode-S ACF84E frequently asked

What is Mode-S code ACF84E?
ACF84E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N935AT.
Where is Mode-S ACF84E registered?
Mode-S code ACF84E 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 ACF84E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACF84E, octal 53174116, decimal 11,335,758.
What flights does ACF84E operate?
Mode-S ACF84E has broadcast 20 distinct callsigns, including DAL2364, DAL3036, DAL3118, DAL2793, DAL2754.