Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ADDA23

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N992AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
ADDA23
Octal
53355043
Decimal
11,393,571
Country
US
Tail
N992AT
Type
B712
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
752
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S ADDA23.

Country allocation

The ICAO 24-bit address ADDA23 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
DAL3011 - 13 2026-07-06
DAL1374 Delta Air Lines 11 2026-07-24
DAL3026 Delta Air Lines 10 2026-07-23
DAL1420 - 9 2026-07-01
DAL1085 Delta Air Lines 9 2026-07-25
DAL3101 Delta Air Lines 8 2026-05-01
DAL3064 - 8 2026-06-29
DAL1618 Delta Air Lines 8 2026-07-24
DAL1126 Delta Air Lines 8 2026-06-02
DAL731 Delta Air Lines 7 2026-07-25
DAL512 - 7 2026-06-23
DAL3177 Delta Air Lines 7 2026-07-20
DAL2862 - 7 2026-07-19
DAL2379 Delta Air Lines 7 2026-07-23
DAL1195 - 7 2026-07-14
DAL3078 Delta Air Lines 6 2026-07-24
DAL3053 - 6 2026-06-29
DAL3047 Delta Air Lines 6 2026-05-31
DAL3030 Delta Air Lines 6 2026-07-26
DAL3017 - 6 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2037 TPA → BOS Jul 26, 21:15 UTCJul 26, 21:45 UTC30m
2026-07-26 DAL2037 TPA → BOS Jul 26, 19:25 UTCJul 26, 19:55 UTC30m
2026-07-26 DAL3030 GNV → ATL Jul 26, 17:30 UTCJul 26, 18:20 UTC50m
2026-07-26 DAL3030 GNV → ATL Jul 26, 15:35 UTCJul 26, 16:20 UTC45m
2026-07-26 DAL1369 ATL → GRR Jul 26, 12:35 UTCJul 26, 13:15 UTC40m
2026-07-26 DAL1369 ATL → GRR Jul 26, 12:31 UTCJul 26, 13:11 UTC40m
2026-07-26 DAL3202 ATL → BNA Jul 26, 01:25 UTCJul 26, 01:50 UTC25m
2026-07-25 DAL731 BOS → FLL Jul 25, 21:20 UTCJul 25, 22:25 UTC1h 5m
2026-07-25 DAL731 BOS → FLL Jul 25, 19:15 UTCJul 25, 20:05 UTC50m
2026-07-25 DAL2048 BDL → ATL Jul 25, 17:10 UTCJul 25, 17:50 UTC40m
2026-07-25 DAL2048 BDL → ATL Jul 25, 14:55 UTCJul 25, 15:45 UTC50m
2026-07-25 DAL1085 JFK → LAX Jul 25, 12:30 UTCJul 25, 13:20 UTC50m
2026-07-25 DAL1085 JFK → LAX Jul 25, 12:27 UTCJul 25, 13:17 UTC50m
2026-07-24 DAL1473 BOS → MCO Jul 24, 23:55 UTCJul 25, 00:40 UTC45m
2026-07-24 DAL1473 BOS → MCO Jul 24, 23:52 UTCJul 25, 00:40 UTC48m
2026-07-24 DAL3078 ATL → LEX Jul 24, 20:35 UTCJul 24, 21:40 UTC1h 5m
2026-07-24 DAL3078 ATL → LEX Jul 24, 20:30 UTCJul 24, 21:42 UTC1h 12m
2026-07-24 DAL3078 ATL → LEX Jul 24, 17:55 UTCJul 24, 18:55 UTC1h 0m
2026-07-24 DAL1374 PBI → MSP Jul 24, 15:20 UTCJul 24, 16:20 UTC1h 0m
2026-07-24 DAL1374 PBI → MSP Jul 24, 13:25 UTCJul 24, 14:15 UTC50m
2026-07-24 DAL1618 LGA → MSY Jul 24, 11:25 UTCJul 24, 12:00 UTC35m
2026-07-24 DAL2034 SLC → SJC Jul 24, 03:35 UTCJul 24, 04:00 UTC25m
2026-07-24 DAL3150 ATL → SAV Jul 24, 01:50 UTCJul 24, 02:20 UTC30m
2026-07-24 DAL3150 ATL → SAV Jul 24, 00:35 UTCJul 24, 01:05 UTC30m
2026-07-23 DAL3026 ATL → HSV Jul 23, 21:30 UTCJul 23, 22:05 UTC35m
2026-07-23 DAL3026 ATL → HSV Jul 23, 20:00 UTCJul 23, 20:30 UTC30m
2026-07-23 DAL1704 DTW → FLL Jul 23, 17:10 UTCJul 23, 18:50 UTC1h 40m
2026-07-23 DAL1704 DTW → FLL Jul 23, 14:30 UTCJul 23, 16:20 UTC1h 50m
2026-07-23 DAL2379 ATL → HPN Jul 23, 10:40 UTCJul 23, 12:30 UTC1h 50m
2026-07-23 DAL1616 ORD → MSP Jul 23, 00:15 UTCJul 23, 02:15 UTC2h 0m
2026-07-22 DAL2094 PHL → MSP Jul 22, 19:20 UTCJul 22, 21:00 UTC1h 40m
2026-07-22 DAL2094 PHL → MSP Jul 22, 16:35 UTCJul 22, 18:20 UTC1h 45m
2026-07-22 DAL376 BOS → ATL Jul 22, 14:40 UTCJul 22, 15:35 UTC55m
2026-07-22 DAL376 BOS → ATL Jul 22, 14:33 UTCJul 22, 15:33 UTC1h 0m
2026-07-22 DAL376 BOS → ATL Jul 22, 12:20 UTCJul 22, 13:10 UTC50m
2026-07-22 DAL1044 TPA → ATL Jul 22, 09:53 UTCJul 22, 10:16 UTC23m
2026-07-21 DAL3150 ATL → SAV Jul 21, 22:50 UTCJul 21, 23:15 UTC25m
2026-07-21 DAL3159 ATL → BNA Jul 21, 20:05 UTCJul 21, 20:45 UTC40m
2026-07-21 DAL3159 ATL → BNA Jul 21, 18:05 UTCJul 21, 18:45 UTC40m
2026-07-21 DAL1687 SEA → ONT Jul 21, 15:30 UTCJul 21, 16:40 UTC1h 10m
2026-07-21 DAL1687 SEA → ONT Jul 21, 13:15 UTCJul 21, 14:20 UTC1h 5m
2026-07-21 DAL2516 PHL → MSP Jul 21, 10:25 UTCJul 21, 11:30 UTC1h 5m
2026-07-21 DAL1289 - Jul 21, 02:05 UTCJul 21, 03:10 UTC1h 5m
2026-07-21 DAL1021 GMU → ATL Jul 21, 00:05 UTCJul 21, 00:35 UTC30m
2026-07-20 DAL1021 - Jul 20, 22:35 UTCJul 20, 23:05 UTC30m
2026-07-20 DAL3159 ATL → BNA Jul 20, 20:30 UTCJul 20, 21:10 UTC40m
2026-07-20 DAL3159 ATL → BNA Jul 20, 20:27 UTCJul 20, 21:05 UTC38m
2026-07-20 DAL3159 ATL → BNA Jul 20, 18:00 UTCJul 20, 18:45 UTC45m
2026-07-20 DAL3108 ATL → DAY Jul 20, 15:25 UTCJul 20, 16:35 UTC1h 10m
2026-07-20 DAL3108 ATL → DAY Jul 20, 13:05 UTCJul 20, 14:15 UTC1h 10m

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 N992AT page for operator, model, and routing details .

Mode-S ADDA23 frequently asked

What is Mode-S code ADDA23?
ADDA23 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N992AT.
Where is Mode-S ADDA23 registered?
Mode-S code ADDA23 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 ADDA23 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADDA23, octal 53355043, decimal 11,393,571.
What flights does ADDA23 operate?
Mode-S ADDA23 has broadcast 20 distinct callsigns, including DAL3011, DAL1374, DAL3026, DAL1420, DAL1085.