Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ADDDDA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N993AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
ADDDDA
Octal
53356732
Decimal
11,394,522
Country
US
Tail
N993AT
Type
B712
No current signal · last broadcast Jul 26, 21:25 UTC
Flights observed
543
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:25 UTC

Last known position

Most recent position reported by Mode-S ADDDDA.

Country allocation

The ICAO 24-bit address ADDDDA 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
DAL2577 Delta Air Lines 10 2026-07-20
DAL1391 - 9 2026-07-15
DAL2676 Delta Air Lines 7 2026-07-16
DAL1665 Delta Air Lines 7 2026-07-20
DAL3078 Delta Air Lines 6 2026-07-23
DAL3063 Delta Air Lines 6 2026-06-05
DAL2157 Delta Air Lines 6 2026-04-18
DAL2039 Delta Air Lines 6 2026-07-20
DAL1604 Delta Air Lines 6 2026-07-25
DAL1546 - 6 2026-07-15
DAL876 - 5 2026-06-25
DAL426 - 5 2026-06-25
DAL3151 Delta Air Lines 5 2026-06-10
DAL3108 - 5 2026-07-01
DAL3042 Delta Air Lines 5 2026-07-24
DAL3011 - 5 2026-07-03
DAL2826 Delta Air Lines 5 2026-07-21
DAL2778 - 5 2026-06-27
DAL2681 - 5 2026-07-09
DAL2211 Delta Air Lines 5 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2020 RSW → BOS Jul 26, 19:40 UTCJul 26, 21:20 UTC1h 40m
2026-07-26 DAL2020 RSW → BOS Jul 26, 17:00 UTCJul 26, 18:40 UTC1h 40m
2026-07-26 DAL376 BOS → ATL Jul 26, 14:45 UTCJul 26, 15:40 UTC55m
2026-07-26 DAL376 BOS → ATL Jul 26, 12:25 UTCJul 26, 13:20 UTC55m
2026-07-26 DAL3186 MEM → ATL Jul 26, 09:50 UTCJul 26, 10:25 UTC35m
2026-07-26 DAL3177 GPT → ATL Jul 26, 02:55 UTCJul 26, 03:35 UTC40m
2026-07-25 DAL3143 ATL → LEX Jul 25, 22:45 UTCJul 25, 23:40 UTC55m
2026-07-25 DAL3143 ATL → LEX Jul 25, 20:40 UTCJul 25, 21:30 UTC50m
2026-07-25 DAL1125 SEA → ORD Jul 25, 17:10 UTCJul 25, 19:30 UTC2h 20m
2026-07-25 DAL1125 SEA → ORD Jul 25, 13:35 UTCJul 25, 15:35 UTC2h 0m
2026-07-25 DAL2953 DCA → MCO Jul 25, 10:50 UTCJul 25, 11:50 UTC1h 0m
2026-07-25 DAL2435 ATL → MLB Jul 25, 03:20 UTCJul 25, 04:25 UTC1h 5m
2026-07-25 DAL1604 JFK → SAN Jul 25, 00:50 UTCJul 25, 01:40 UTC50m
2026-07-25 DAL1604 JFK → SAN Jul 25, 00:48 UTCJul 25, 01:35 UTC47m
2026-07-24 DAL1604 JFK → SAN Jul 24, 22:55 UTCJul 24, 23:40 UTC45m
2026-07-24 DAL3193 ATL → BNA Jul 24, 20:30 UTCJul 24, 21:10 UTC40m
2026-07-24 DAL3193 ATL → BNA Jul 24, 20:28 UTCJul 24, 21:10 UTC42m
2026-07-24 DAL3193 ATL → BNA Jul 24, 18:20 UTCJul 24, 18:55 UTC35m
2026-07-24 DAL2754 HSV → ATL Jul 24, 15:00 UTCJul 24, 16:45 UTC1h 45m
2026-07-24 DAL2754 HSV → ATL Jul 24, 12:25 UTCJul 24, 14:00 UTC1h 35m
2026-07-24 DAL1979 MSP → PUJ Jul 24, 10:25 UTCJul 24, 11:00 UTC35m
2026-07-24 DAL2257 PHX → JFK Jul 24, 02:15 UTCJul 24, 02:40 UTC25m
2026-07-24 DAL2257 PHX → JFK Jul 24, 02:15 UTCJul 24, 02:39 UTC24m
2026-07-24 DAL3042 ATL → TYS Jul 24, 00:15 UTCJul 24, 00:45 UTC30m
2026-07-23 DAL3042 ATL → TYS Jul 23, 22:00 UTCJul 23, 22:35 UTC35m
2026-07-23 DAL3078 ATL → LEX Jul 23, 19:30 UTCJul 23, 20:35 UTC1h 5m
2026-07-23 DAL3078 ATL → LEX Jul 23, 17:35 UTCJul 23, 18:25 UTC50m
2026-07-23 DAL2158 OAK → SLC Jul 23, 15:50 UTCJul 23, 16:25 UTC35m
2026-07-23 DAL2158 OAK → SLC Jul 23, 14:05 UTCJul 23, 14:40 UTC35m
2026-07-23 DAL1624 SAN → MSP Jul 23, 11:35 UTCJul 23, 12:30 UTC55m
2026-07-23 DAL1230 BOS → MCI Jul 23, 00:10 UTCJul 23, 01:35 UTC1h 25m
2026-07-23 DAL1230 BOS → MCI Jul 23, 00:07 UTCJul 23, 01:32 UTC1h 25m
2026-07-22 DAL2480 BWI → DTW Jul 22, 21:30 UTCJul 22, 22:40 UTC1h 10m
2026-07-22 DAL2480 BWI → DTW Jul 22, 19:25 UTCJul 22, 20:30 UTC1h 5m
2026-07-22 DAL2331 ATL → JAX Jul 22, 16:55 UTCJul 22, 18:14 UTC1h 19m
2026-07-22 DAL2331 ATL → JAX Jul 22, 17:00 UTCJul 22, 18:10 UTC1h 10m
2026-07-22 DAL2331 ATL → JAX Jul 22, 14:20 UTCJul 22, 15:25 UTC1h 5m
2026-07-22 DAL1626 MSP → MSY Jul 22, 11:40 UTCJul 22, 12:45 UTC1h 5m
2026-07-22 DAL1541 FLL → LGA Jul 22, 01:25 UTCJul 22, 02:35 UTC1h 10m
2026-07-21 DAL2814 - Jul 21, 22:50 UTCJul 22, 00:20 UTC1h 30m
2026-07-21 DAL2814 - Jul 21, 18:45 UTCJul 21, 20:15 UTC1h 30m
2026-07-21 DAL2826 SLC → CVG Jul 21, 15:40 UTCJul 21, 17:00 UTC1h 20m
2026-07-21 DAL2826 SLC → CVG Jul 21, 15:35 UTCJul 21, 17:05 UTC1h 30m
2026-07-21 DAL2826 SLC → CVG Jul 21, 13:00 UTCJul 21, 14:35 UTC1h 35m
2026-07-21 DAL1540 - Jul 21, 10:25 UTCJul 21, 11:45 UTC1h 20m
2026-07-21 DAL2402 DTW → PHL Jul 21, 01:55 UTCJul 21, 03:10 UTC1h 15m
2026-07-20 DAL2761 - Jul 20, 22:50 UTCJul 21, 00:20 UTC1h 30m
2026-07-20 DAL2761 - Jul 20, 20:05 UTCJul 20, 21:35 UTC1h 30m
2026-07-20 DAL2577 TPA → BOS Jul 20, 17:15 UTCJul 20, 18:30 UTC1h 15m
2026-07-20 DAL2577 TPA → BOS Jul 20, 17:15 UTCJul 20, 18:30 UTC1h 15m

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 N993AT page for operator, model, and routing details .

Mode-S ADDDDA frequently asked

What is Mode-S code ADDDDA?
ADDDDA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N993AT.
Where is Mode-S ADDDDA registered?
Mode-S code ADDDDA 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 ADDDDA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADDDDA, octal 53356732, decimal 11,394,522.
What flights does ADDDDA operate?
Mode-S ADDDDA has broadcast 20 distinct callsigns, including DAL2577, DAL1391, DAL2676, DAL1665, DAL3078.