Apparatus

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sensors Mode-S transponder

AD474C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N955AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
AD474C
Octal
53243514
Decimal
11,355,980
Country
US
Tail
N955AT
Type
B712
No current signal · last broadcast 25m ago
Flights observed
609
Distinct callsigns
20
Country
US
Last broadcast
25m ago

Last known position

Most recent position reported by Mode-S AD474C.

Country allocation

The ICAO 24-bit address AD474C 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
DAL3030 - 13 2026-07-08
DAL3143 - 11 2026-07-12
DAL2793 - 10 2026-07-07
DAL1248 - 9 2026-06-25
DAL3195 Delta Air Lines 8 2026-05-27
DAL3158 Delta Air Lines 7 2026-05-31
DAL3136 - 7 2026-06-27
DAL3108 Delta Air Lines 7 2026-06-05
DAL3012 Delta Air Lines 7 2026-06-07
DAL2620 Delta Air Lines 7 2026-04-19
DAL1063 Delta Air Lines 7 2026-05-23
DAL3078 - 6 2026-06-15
DAL3064 - 6 2026-06-24
DAL3026 - 6 2026-06-30
DAL1155 Delta Air Lines 6 2026-06-02
DAL731 Delta Air Lines 5 2026-05-15
DAL426 Delta Air Lines 5 2026-06-10
DAL3096 - 5 2026-07-02
DAL3084 Delta Air Lines 5 2026-06-05
DAL3083 - 5 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL2370 - Jul 14, 11:40 UTCJul 14, 13:00 UTC1h 20m
2026-07-14 DAL2501 - Jul 14, 04:15 UTCJul 14, 05:10 UTC55m
2026-07-14 DAL2501 ATL → MEM Jul 14, 04:12 UTCJul 14, 05:02 UTC50m
2026-07-14 DAL2758 - Jul 14, 01:30 UTCJul 14, 02:50 UTC1h 20m
2026-07-13 DAL2758 - Jul 13, 23:10 UTCJul 14, 00:25 UTC1h 15m
2026-07-13 DAL3099 - Jul 13, 20:50 UTCJul 13, 21:45 UTC55m
2026-07-13 DAL3099 AVL → ATL Jul 13, 20:46 UTCJul 13, 21:43 UTC57m
2026-07-13 DAL3099 - Jul 13, 17:50 UTCJul 13, 18:25 UTC35m
2026-07-13 DAL1743 - Jul 13, 16:10 UTCJul 13, 16:45 UTC35m
2026-07-13 DAL1743 - Jul 13, 14:30 UTCJul 13, 15:00 UTC30m
2026-07-13 DAL2216 ICT → ATL Jul 13, 10:50 UTCJul 13, 12:40 UTC1h 50m
2026-07-13 DAL2959 - Jul 13, 01:45 UTCJul 13, 03:30 UTC1h 45m
2026-07-12 DAL3143 - Jul 12, 22:05 UTCJul 12, 23:05 UTC1h 0m
2026-07-12 DAL3143 ATL → LEX Jul 12, 20:10 UTCJul 12, 20:55 UTC45m
2026-07-12 DAL1725 - Jul 12, 18:01 UTCJul 12, 18:30 UTC30m
2026-07-12 DAL1725 GSP → ATL Jul 12, 17:56 UTCJul 12, 18:27 UTC31m
2026-07-12 DAL1725 - Jul 12, 16:10 UTCJul 12, 16:40 UTC30m
2026-07-12 DAL1010 - Jul 12, 14:20 UTCJul 12, 14:55 UTC35m
2026-07-12 DAL1010 - Jul 12, 12:30 UTCJul 12, 13:10 UTC40m
2026-07-12 DAL2637 - Jul 12, 10:40 UTCJul 12, 11:20 UTC40m
2026-07-12 DAL1490 ATL → BNA Jul 12, 01:25 UTCJul 12, 02:20 UTC55m
2026-07-11 DAL1262 - Jul 11, 23:00 UTCJul 11, 23:50 UTC50m
2026-07-11 DAL1262 - Jul 11, 18:15 UTCJul 11, 18:55 UTC40m
2026-07-11 DAL573 - Jul 11, 16:10 UTCJul 11, 16:45 UTC35m
2026-07-11 DAL573 - Jul 11, 14:20 UTCJul 11, 14:55 UTC35m
2026-07-11 DAL516 DAL → ATL Jul 11, 11:20 UTCJul 11, 13:00 UTC1h 40m
2026-07-11 DAL1104 ATL → DAL Jul 11, 03:01 UTCJul 11, 04:40 UTC1h 40m
2026-07-11 DAL1104 ATL → DAL Jul 11, 02:58 UTCJul 11, 04:37 UTC1h 39m
2026-07-10 DAL2599 - Jul 10, 23:35 UTCJul 11, 01:25 UTC1h 50m
2026-07-10 DAL2599 MSN → ATL Jul 10, 23:32 UTCJul 11, 01:09 UTC1h 37m
2026-07-10 DAL2599 ATL → MSN Jul 10, 20:20 UTCJul 10, 22:00 UTC1h 40m
2026-07-10 DAL2754 - Jul 10, 15:05 UTCJul 10, 16:40 UTC1h 35m
2026-07-10 DAL2754 ATL → TUL Jul 10, 12:40 UTCJul 10, 14:10 UTC1h 30m
2026-07-10 DAL3053 ECP → ATL Jul 10, 06:35 UTCJul 10, 07:20 UTC45m
2026-07-10 DAL3053 - Jul 10, 03:00 UTCJul 10, 03:45 UTC45m
2026-07-10 DAL3063 - Jul 10, 00:35 UTCJul 10, 01:30 UTC55m
2026-07-10 DAL3063 GPT → ATL Jul 10, 00:33 UTCJul 10, 01:32 UTC59m
2026-07-09 DAL3063 - Jul 9, 22:45 UTCJul 9, 23:30 UTC45m
2026-07-09 DAL3127 - Jul 9, 19:15 UTCJul 9, 20:45 UTC1h 30m
2026-07-09 DAL3127 ATL → MLB Jul 9, 16:55 UTCJul 9, 18:00 UTC1h 5m
2026-07-09 DAL1708 - Jul 9, 15:05 UTCJul 9, 15:40 UTC35m
2026-07-09 DAL1708 HSV → ATL Jul 9, 15:02 UTCJul 9, 15:34 UTC32m
2026-07-09 DAL1708 - Jul 9, 13:15 UTCJul 9, 13:50 UTC35m
2026-07-09 DAL3004 - Jul 9, 10:45 UTCJul 9, 11:35 UTC50m
2026-07-09 DAL1617 - Jul 9, 01:25 UTCJul 9, 02:10 UTC45m
2026-07-08 DAL3083 - Jul 8, 22:30 UTCJul 8, 23:10 UTC40m
2026-07-08 DAL3083 - Jul 8, 20:55 UTCJul 8, 21:30 UTC35m
2026-07-08 DAL3030 - Jul 8, 17:15 UTCJul 8, 18:05 UTC50m
2026-07-08 DAL3030 - Jul 8, 15:20 UTCJul 8, 16:05 UTC45m
2026-07-08 DAL2853 - Jul 8, 12:05 UTCJul 8, 12:40 UTC35m

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 N955AT page for operator, model, and routing details .

Mode-S AD474C frequently asked

What is Mode-S code AD474C?
AD474C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N955AT.
Where is Mode-S AD474C registered?
Mode-S code AD474C 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 AD474C broadcasting right now?
No active broadcast right now. Last signal was 25m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD474C, octal 53243514, decimal 11,355,980.
What flights does AD474C operate?
Mode-S AD474C has broadcast 20 distinct callsigns, including DAL3030, DAL3143, DAL2793, DAL1248, DAL3195.