Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACFC56

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N936DZ · operated by DELTA AIR LINES INC

Hex
ACFC56
Octal
53176126
Decimal
11,336,790
Country
US
Tail
N936DZ
Type
B739
Broadcasting now · callsign DAL1419 · 36,000 ft
Flights observed
199
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

ACFC56 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ACFC56 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
DAL1757 Delta Air Lines 5 2026-05-17
DAL787 Delta Air Lines 4 2026-05-26
DAL3146 Delta Air Lines 4 2026-05-16
DAL801 Delta Air Lines 3 2026-04-29
DAL2651 Delta Air Lines 3 2026-05-19
DAL2323 Delta Air Lines 3 2026-05-10
DAL1013 Delta Air Lines 3 2026-05-22
DAL941 Delta Air Lines 2 2026-05-06
DAL886 Delta Air Lines 2 2026-05-14
DAL648 Delta Air Lines 2 2026-05-02
DAL532 Delta Air Lines 2 2026-05-11
DAL505 Delta Air Lines 2 2026-05-16
DAL495 Delta Air Lines 2 2026-05-10
DAL349 Delta Air Lines 2 2026-05-01
DAL3074 Delta Air Lines 2 2026-05-17
DAL305 Delta Air Lines 2 2026-05-12
DAL2966 Delta Air Lines 2 2026-04-30
DAL2936 Delta Air Lines 2 2026-04-16
DAL2931 Delta Air Lines 2 2026-04-16
DAL2918 Delta Air Lines 2 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 DAL1419 DTW → DEN Jun 2, 19:20 UTCJun 2, 19:30 UTC10m
2026-06-02 DAL1642 IAH → LGA Jun 2, 15:15 UTCJun 2, 17:25 UTC2h 10m
2026-06-02 DAL2531 MSN → MSP Jun 2, 11:15 UTCJun 2, 13:35 UTC2h 20m
2026-06-02 DAL2531 MSN → MSP Jun 2, 11:20 UTCJun 2, 13:40 UTC2h 20m
2026-06-01 DAL2434 HPN → ATL Jun 1, 23:25 UTCJun 2, 01:40 UTC2h 15m
2026-06-01 DAL2093 EWR → ATL Jun 1, 18:45 UTCJun 1, 21:05 UTC2h 20m
2026-06-01 DAL2380 MSY → LGA Jun 1, 15:20 UTCJun 1, 17:05 UTC1h 45m
2026-06-01 DAL1619 DTW → TPA Jun 1, 12:55 UTCJun 1, 13:30 UTC35m
2026-05-31 DAL2319 MCI → DTW May 31, 23:30 UTCJun 1, 00:00 UTC30m
2026-05-31 DAL1805 SAP → ATL May 31, 20:35 UTCMay 31, 21:40 UTC1h 5m
2026-05-31 DAL1782 ATL → SAP May 31, 14:23 UTCMay 31, 17:03 UTC2h 40m
2026-05-31 DAL1782 ATL → SAP May 31, 14:25 UTCMay 31, 15:35 UTC1h 10m
2026-05-31 DAL3019 PNS → ATL May 31, 11:05 UTCMay 31, 11:50 UTC45m
2026-05-30 DAL1159 LAS → MSP May 30, 23:15 UTCMay 31, 00:50 UTC1h 35m
2026-05-30 DAL2022 SDF → ATL May 30, 17:15 UTCMay 30, 21:15 UTC4h 0m
2026-05-30 DAL967 JFK → AUS May 30, 11:20 UTCMay 30, 15:25 UTC4h 5m
2026-05-30 DAL1409 CVG → ATL May 30, 02:52 UTCMay 30, 06:44 UTC3h 52m
2026-05-30 DAL1409 CVG → ATL May 30, 02:55 UTCMay 30, 06:50 UTC3h 55m
2026-05-29 DAL1596 MSP → ATL May 29, 21:30 UTCMay 29, 23:10 UTC1h 40m
2026-05-29 DAL1296 DEN → DTW May 29, 17:55 UTCMay 29, 19:41 UTC1h 46m
2026-05-29 DAL1296 DEN → DTW May 29, 17:55 UTCMay 29, 19:45 UTC1h 50m
2026-05-29 DAL2628 HSV → ATL May 29, 13:30 UTCMay 29, 15:55 UTC2h 26m
2026-05-29 DAL2752 SNA → SEA May 29, 10:30 UTCMay 29, 12:00 UTC1h 30m
2026-05-28 DAL558 BOS → SLC May 28, 19:15 UTCMay 28, 23:25 UTC4h 10m
2026-05-28 DAL2530 LGA → BOS May 28, 14:40 UTCMay 28, 16:55 UTC2h 15m
2026-05-28 DAL2672 ATL → DTW May 28, 02:40 UTCMay 28, 05:00 UTC2h 20m
2026-05-27 DAL472 LAS → DTW May 27, 20:20 UTCMay 28, 00:50 UTC4h 30m
2026-05-27 DAL654 JFK → PHX May 27, 14:20 UTCMay 27, 18:40 UTC4h 20m
2026-05-27 DAL933 LGA → MCO May 27, 01:34 UTCMay 27, 06:04 UTC4h 30m
2026-05-26 DAL787 ATL → BOS May 26, 19:40 UTCMay 26, 23:49 UTC4h 10m
2026-05-26 DAL787 ATL → BOS May 26, 13:45 UTCMay 26, 17:44 UTC4h 0m
2026-05-26 DAL1445 MCO → LGA May 26, 11:05 UTCMay 26, 12:20 UTC1h 15m
2026-05-26 DAL1057 JFK → LAX May 26, 01:24 UTCMay 26, 02:29 UTC1h 5m
2026-05-25 DAL787 ATL → BOS May 25, 19:35 UTCMay 25, 23:30 UTC3h 55m
2026-05-25 DAL787 ATL → BOS May 25, 13:50 UTCMay 25, 18:00 UTC4h 10m
2026-05-25 DAL1192 JFK → ATL May 25, 10:35 UTCMay 25, 11:40 UTC1h 5m
2026-05-24 DAL489 SEA → BOS May 24, 23:15 UTCMay 25, 03:50 UTC4h 35m
2026-05-24 DAL629 ATL → BOS May 24, 16:15 UTCMay 24, 21:05 UTC4h 50m
2026-05-24 DAL1074 MSP → LGA May 24, 12:10 UTCMay 24, 14:30 UTC2h 20m
2026-05-24 DAL1074 MSP → LGA May 24, 12:09 UTCMay 24, 14:33 UTC2h 24m
2026-05-24 DAL971 MSP → CMH May 24, 00:50 UTCMay 24, 03:30 UTC2h 40m
2026-05-23 DAL1962 CUN → ATL May 23, 20:45 UTCMay 23, 22:45 UTC2h 0m
2026-05-23 DAL1962 CUN → ATL May 23, 20:44 UTCMay 23, 22:45 UTC2h 1m
2026-05-23 DAL592 BOS → CUN May 23, 17:15 UTCMay 23, 19:15 UTC2h 1m
2026-05-23 DAL1741 ELP → ATL May 23, 12:50 UTCMay 23, 15:35 UTC2h 45m
2026-05-23 DAL1713 ATL → ELP May 23, 01:10 UTCMay 23, 04:00 UTC2h 49m
2026-05-23 DAL1713 ATL → ELP May 23, 01:07 UTCMay 23, 03:53 UTC2h 46m
2026-05-22 DAL1013 DTW → CLT May 22, 22:35 UTCMay 22, 23:20 UTC45m
2026-05-22 DAL1013 DTW → CLT May 22, 19:53 UTCMay 22, 20:40 UTC47m
2026-05-22 DAL1013 DTW → CLT May 22, 19:55 UTCMay 22, 20:45 UTC50m

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 N936DZ page for operator, model, and routing details .

Mode-S ACFC56 frequently asked

What is Mode-S code ACFC56?
ACFC56 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N936DZ.
Where is Mode-S ACFC56 registered?
Mode-S code ACFC56 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 ACFC56 broadcasting right now?
Yes. Mode-S ACFC56 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACFC56, octal 53176126, decimal 11,336,790.
What flights does ACFC56 operate?
Mode-S ACFC56 has broadcast 20 distinct callsigns, including DAL1757, DAL787, DAL3146, DAL801, DAL2651.