Apparatus

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sensors Mode-S transponder

AD1FCD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N945AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
AD1FCD
Octal
53217715
Decimal
11,345,869
Country
US
Tail
N945AT
Type
B712
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
710
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S AD1FCD.

Country allocation

The ICAO 24-bit address AD1FCD 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
DAL1546 Delta Air Lines 10 2026-06-06
DAL3151 - 9 2026-07-10
DAL2128 Delta Air Lines 9 2026-07-20
DAL1391 Delta Air Lines 9 2026-06-06
DAL512 Delta Air Lines 8 2026-07-24
DAL3199 - 8 2026-06-18
DAL3182 - 8 2026-07-20
DAL3012 - 8 2026-06-25
DAL1725 - 8 2026-07-11
DAL1637 - 8 2026-07-15
DAL2973 Delta Air Lines 7 2026-05-28
DAL2730 - 7 2026-07-03
DAL2684 Delta Air Lines 7 2026-06-05
DAL1787 Delta Air Lines 7 2026-06-04
DAL1259 - 7 2026-07-04
DAL1063 - 7 2026-07-03
DAL3088 - 6 2026-06-17
DAL3071 - 6 2026-06-29
DAL3032 Delta Air Lines 6 2026-06-02
DAL3011 - 6 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL3078 ATL → LEX Jul 26, 20:25 UTCJul 26, 21:15 UTC50m
2026-07-26 DAL3078 ATL → LEX Jul 26, 18:35 UTCJul 26, 19:25 UTC50m
2026-07-26 DAL3155 AUS → DTW Jul 26, 16:25 UTCJul 26, 17:20 UTC55m
2026-07-26 DAL3178 ATL → GPT Jul 26, 14:20 UTCJul 26, 15:05 UTC45m
2026-07-26 DAL1444 PHL → ATL Jul 26, 10:50 UTCJul 26, 12:10 UTC1h 20m
2026-07-26 DAL1444 PHL → ATL Jul 26, 10:50 UTCJul 26, 12:05 UTC1h 15m
2026-07-25 DAL1444 PHL → ATL Jul 25, 16:10 UTCJul 25, 17:30 UTC1h 20m
2026-07-25 DAL1444 PHL → ATL Jul 25, 16:08 UTCJul 25, 17:23 UTC1h 15m
2026-07-25 DAL3156 ATL → STL Jul 25, 12:20 UTCJul 25, 13:00 UTC40m
2026-07-25 DAL3156 ATL → STL Jul 25, 12:17 UTCJul 25, 12:58 UTC41m
2026-07-25 DAL3139 ATL → CLT Jul 25, 01:05 UTCJul 25, 01:45 UTC40m
2026-07-24 DAL512 DAL → ATL Jul 24, 22:15 UTCJul 24, 23:55 UTC1h 40m
2026-07-24 DAL0512 JFK → LAS Jul 24, 19:10 UTCJul 24, 21:05 UTC1h 55m
2026-07-24 DAL441 RDU → MSP Jul 24, 15:50 UTCJul 24, 17:35 UTC1h 45m
2026-07-24 441 ATL → DAL Jul 24, 12:55 UTCJul 24, 14:35 UTC1h 40m
2026-07-24 DAL2953 DCA → MCO Jul 24, 10:00 UTCJul 24, 11:05 UTC1h 5m
2026-07-24 DAL2435 ATL → MLB Jul 24, 02:45 UTCJul 24, 03:47 UTC1h 2m
2026-07-24 DAL2435 ATL → MLB Jul 24, 02:45 UTCJul 24, 03:50 UTC1h 5m
2026-07-24 DAL1093 SFO → SLC Jul 24, 00:20 UTCJul 24, 01:10 UTC50m
2026-07-24 DAL1093 SFO → SLC Jul 24, 00:13 UTCJul 24, 01:08 UTC55m
2026-07-23 DAL1093 SFO → SLC Jul 23, 22:40 UTCJul 23, 23:20 UTC40m
2026-07-23 DAL2094 PHL → MSP Jul 23, 19:40 UTCJul 23, 21:15 UTC1h 35m
2026-07-23 DAL2094 PHL → MSP Jul 23, 19:39 UTCJul 23, 21:16 UTC1h 37m
2026-07-23 DAL2094 PHL → MSP Jul 23, 16:40 UTCJul 23, 18:25 UTC1h 45m
2026-07-23 DAL2793 SLC → MKE Jul 23, 14:15 UTCJul 23, 15:10 UTC55m
2026-07-23 DAL2793 SLC → MKE Jul 23, 12:25 UTCJul 23, 13:10 UTC45m
2026-07-23 DAL1044 TPA → ATL Jul 23, 09:40 UTCJul 23, 10:05 UTC25m
2026-07-23 DAL1044 TPA → ATL Jul 23, 09:38 UTCJul 23, 10:03 UTC25m
2026-07-22 DAL3150 ATL → SAV Jul 22, 22:50 UTCJul 22, 23:15 UTC25m
2026-07-22 DAL1347 TPA → LGA Jul 22, 18:40 UTCJul 22, 19:45 UTC1h 5m
2026-07-22 DAL1347 TPA → LGA Jul 22, 18:36 UTCJul 22, 19:44 UTC1h 8m
2026-07-22 DAL1347 TPA → LGA Jul 22, 16:35 UTCJul 22, 17:30 UTC55m
2026-07-22 DAL2793 SLC → MKE Jul 22, 14:15 UTCJul 22, 15:05 UTC50m
2026-07-22 DAL2793 SLC → MKE Jul 22, 12:25 UTCJul 22, 13:10 UTC45m
2026-07-22 DAL3121 ATL → BNA Jul 22, 04:15 UTCJul 22, 05:00 UTC45m
2026-07-21 DAL2758 MSP → PHX Jul 21, 23:55 UTCJul 22, 01:05 UTC1h 10m
2026-07-21 DAL2758 MSP → PHX Jul 21, 21:25 UTCJul 21, 22:45 UTC1h 20m
2026-07-20 DAL2153 - Jul 20, 22:15 UTCJul 20, 22:45 UTC30m
2026-07-20 DAL2153 CAE → ATL Jul 20, 22:09 UTCJul 20, 22:47 UTC38m
2026-07-20 DAL2153 - Jul 20, 20:25 UTCJul 20, 21:00 UTC35m
2026-07-20 DAL3182 - Jul 20, 18:10 UTCJul 20, 18:50 UTC40m
2026-07-20 DAL3182 - Jul 20, 16:05 UTCJul 20, 16:45 UTC40m
2026-07-20 DAL3114 - Jul 20, 14:15 UTCJul 20, 14:55 UTC40m
2026-07-20 DAL3131 - Jul 20, 03:40 UTCJul 20, 04:20 UTC40m
2026-07-20 DAL2128 ATL → ICT Jul 20, 00:40 UTCJul 20, 02:25 UTC1h 45m
2026-07-20 DAL2128 ATL → ICT Jul 20, 00:38 UTCJul 20, 02:21 UTC1h 43m
2026-07-19 DAL2128 ATL → ICT Jul 19, 21:45 UTCJul 19, 23:35 UTC1h 50m
2026-07-19 DAL3011 SAV → ATL Jul 19, 14:30 UTCJul 19, 15:05 UTC35m
2026-07-19 DAL3011 ATL → SAV Jul 19, 12:40 UTCJul 19, 13:25 UTC45m
2026-07-19 DAL3187 - Jul 19, 10:05 UTCJul 19, 10:55 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 N945AT page for operator, model, and routing details .

Mode-S AD1FCD frequently asked

What is Mode-S code AD1FCD?
AD1FCD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N945AT.
Where is Mode-S AD1FCD registered?
Mode-S code AD1FCD 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 AD1FCD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD1FCD, octal 53217715, decimal 11,345,869.
What flights does AD1FCD operate?
Mode-S AD1FCD has broadcast 20 distinct callsigns, including DAL1546, DAL3151, DAL2128, DAL1391, DAL512.