Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AC4CD4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N892AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
AC4CD4
Octal
53046324
Decimal
11,291,860
Country
US
Tail
N892AT
Type
B712
Broadcasting now · callsign DAL2331 · 30,000 ft
Flights observed
759
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Current position

AC4CD4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC4CD4 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
DAL2048 - 11 2026-06-27
DAL2741 - 10 2026-07-12
DAL1704 - 10 2026-07-17
DAL2814 - 9 2026-07-14
DAL2179 Delta Air Lines 9 2026-07-22
DAL1010 Delta Air Lines 9 2026-06-11
DAL3144 - 8 2026-07-12
DAL2480 - 8 2026-07-15
DAL1716 Delta Air Lines 8 2026-07-04
DAL1391 - 8 2026-07-13
DAL1248 - 8 2026-06-24
DAL3050 Delta Air Lines 7 2026-07-22
DAL3030 Delta Air Lines 7 2026-06-10
DAL2761 Delta Air Lines 7 2026-07-26
DAL2577 - 7 2026-07-13
DAL2417 - 7 2026-07-09
DAL2128 - 7 2026-07-16
DAL1666 - 7 2026-06-20
DAL1278 - 7 2026-07-11
DAL876 - 6 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2761 DTW → MCI Jul 26, 22:50 UTCJul 26, 23:00 UTC10m
2026-07-26 DAL2761 DTW → MCI Jul 26, 20:05 UTCJul 26, 21:30 UTC1h 25m
2026-07-26 DAL426 CMH → ATL Jul 26, 16:55 UTCJul 26, 18:25 UTC1h 30m
2026-07-26 DAL426 CMH → ATL Jul 26, 14:10 UTCJul 26, 15:35 UTC1h 25m
2026-07-26 DAL1256 BOS → LGA Jul 26, 11:30 UTCJul 26, 13:00 UTC1h 30m
2026-07-26 DAL1321 DTW → RSW Jul 26, 01:45 UTCJul 26, 03:05 UTC1h 20m
2026-07-25 DAL1430 TPA → BOS Jul 25, 23:15 UTCJul 26, 00:30 UTC1h 15m
2026-07-25 DAL1430 TPA → BOS Jul 25, 23:13 UTCJul 26, 00:30 UTC1h 17m
2026-07-25 DAL3031 CLT → ATL Jul 25, 21:40 UTCJul 25, 22:20 UTC40m
2026-07-25 DAL516 LAX → JFK Jul 25, 11:15 UTCJul 25, 12:55 UTC1h 40m
2026-07-25 DAL1104 JFK → LAS Jul 25, 02:55 UTCJul 25, 04:35 UTC1h 40m
2026-07-24 DAL3088 ATL → DAY Jul 24, 23:50 UTCJul 25, 01:00 UTC1h 10m
2026-07-24 DAL3088 ATL → DAY Jul 24, 23:49 UTCJul 25, 01:04 UTC1h 15m
2026-07-24 DAL3088 ATL → DAY Jul 24, 20:45 UTCJul 24, 21:00 UTC15m
2026-07-24 DAL3088 ATL → DAY Jul 24, 20:40 UTCJul 24, 21:42 UTC1h 2m
2026-07-24 DAL304 SNA → DTW Jul 24, 17:30 UTCJul 24, 19:35 UTC2h 5m
2026-07-24 DAL304 SNA → DTW Jul 24, 14:40 UTCJul 24, 16:20 UTC1h 40m
2026-07-24 DAL1160 MSN → ATL Jul 24, 10:50 UTCJul 24, 12:35 UTC1h 45m
2026-07-24 DAL2144 SLC → SJC Jul 24, 01:55 UTCJul 24, 03:35 UTC1h 40m
2026-07-23 DAL1868 SEA → CUN Jul 23, 22:15 UTCJul 23, 22:55 UTC40m
2026-07-23 DAL1868 SEA → CUN Jul 23, 20:15 UTCJul 23, 20:50 UTC35m
2026-07-23 DAL3151 - Jul 23, 18:15 UTCJul 23, 18:55 UTC40m
2026-07-23 DAL3151 JAN → ATL Jul 23, 18:00 UTCJul 23, 18:52 UTC52m
2026-07-23 DAL3151 - Jul 23, 16:00 UTCJul 23, 16:45 UTC45m
2026-07-23 DAL3077 ATL → AVL Jul 23, 14:05 UTCJul 23, 14:40 UTC35m
2026-07-23 DAL3077 ATL → AVL Jul 23, 12:25 UTCJul 23, 12:55 UTC30m
2026-07-23 DAL3187 - Jul 23, 10:10 UTCJul 23, 11:05 UTC55m
2026-07-23 DAL3187 ILM → ATL Jul 23, 10:02 UTCJul 23, 11:02 UTC1h 0m
2026-07-23 DAL3070 ATL → ILM Jul 23, 01:35 UTCJul 23, 02:30 UTC55m
2026-07-22 DAL3050 ATL → GSO Jul 22, 22:45 UTCJul 22, 23:30 UTC45m
2026-07-22 DAL3050 ATL → GSO Jul 22, 20:40 UTCJul 22, 21:35 UTC55m
2026-07-22 DAL2179 SFO → SLC Jul 22, 18:40 UTCJul 22, 19:30 UTC50m
2026-07-22 DAL2179 SFO → SLC Jul 22, 18:38 UTCJul 22, 19:23 UTC45m
2026-07-22 DAL2179 SFO → SLC Jul 22, 16:40 UTCJul 22, 17:20 UTC40m
2026-07-22 DAL1149 - Jul 22, 14:30 UTCJul 22, 15:20 UTC50m
2026-07-22 DAL1149 MEM → ATL Jul 22, 14:25 UTCJul 22, 15:19 UTC54m
2026-07-21 DAL2939 MEM → ATL Jul 21, 22:25 UTCJul 21, 23:15 UTC50m
2026-07-21 DAL2832 DTW → JFK Jul 21, 20:20 UTCJul 21, 21:05 UTC45m
2026-07-21 DAL2832 DTW → JFK Jul 21, 18:05 UTCJul 21, 18:40 UTC35m
2026-07-21 DAL1743 - Jul 21, 16:00 UTCJul 21, 16:35 UTC35m
2026-07-21 DAL1743 - Jul 21, 14:25 UTCJul 21, 15:00 UTC35m
2026-07-21 DAL3155 AUS → DTW Jul 21, 11:40 UTCJul 21, 12:35 UTC55m
2026-07-21 DAL3155 AUS → DTW Jul 21, 11:36 UTCJul 21, 12:31 UTC55m
2026-07-21 DAL3178 ATL → GPT Jul 21, 02:45 UTCJul 21, 03:35 UTC50m
2026-07-21 DAL3050 - Jul 21, 00:40 UTCJul 21, 01:30 UTC50m
2026-07-20 DAL3050 - Jul 20, 22:20 UTCJul 20, 23:10 UTC50m
2026-07-20 DAL3193 - Jul 20, 20:05 UTCJul 20, 20:50 UTC45m
2026-07-20 DAL3193 - Jul 20, 18:25 UTCJul 20, 19:00 UTC35m
2026-07-20 DAL2939 MEM → ATL Jul 20, 03:35 UTCJul 20, 04:25 UTC50m
2026-07-20 DAL2939 MEM → ATL Jul 20, 01:15 UTCJul 20, 02:35 UTC1h 20m

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 N892AT page for operator, model, and routing details .

Mode-S AC4CD4 frequently asked

What is Mode-S code AC4CD4?
AC4CD4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N892AT.
Where is Mode-S AC4CD4 registered?
Mode-S code AC4CD4 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 AC4CD4 broadcasting right now?
Yes. Mode-S AC4CD4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC4CD4, octal 53046324, decimal 11,291,860.
What flights does AC4CD4 operate?
Mode-S AC4CD4 has broadcast 20 distinct callsigns, including DAL2048, DAL2741, DAL1704, DAL2814, DAL2179.