Apparatus

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sensors Mode-S transponder

AD1C16

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N944AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
AD1C16
Octal
53216026
Decimal
11,344,918
Country
US
Tail
N944AT
Type
B712
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
748
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S AD1C16.

Country allocation

The ICAO 24-bit address AD1C16 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
DAL3151 - 13 2026-07-12
DAL2182 - 10 2026-07-18
DAL2968 - 9 2026-07-15
DAL2331 - 9 2026-06-28
DAL3137 Delta Air Lines 8 2026-07-22
DAL3012 - 8 2026-07-07
DAL2086 - 8 2026-07-01
DAL3048 Delta Air Lines 7 2026-06-06
DAL2868 - 7 2026-07-16
DAL2763 - 7 2026-06-27
DAL2718 Delta Air Lines 7 2026-05-21
DAL2620 - 7 2026-07-13
DAL2158 Delta Air Lines 7 2026-07-26
DAL1787 Delta Air Lines 7 2026-07-23
DAL1704 Delta Air Lines 7 2026-06-11
DAL1686 - 7 2026-06-24
DAL3158 Delta Air Lines 6 2026-07-25
DAL3096 - 6 2026-07-08
DAL3077 Delta Air Lines 6 2026-07-19
DAL3025 Delta Air Lines 6 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2517 LGA → SRQ Jul 26, 20:50 UTCJul 26, 21:30 UTC40m
2026-07-26 DAL2517 LGA → SRQ Jul 26, 18:20 UTCJul 26, 19:50 UTC1h 30m
2026-07-26 DAL2158 OAK → SLC Jul 26, 16:00 UTCJul 26, 16:30 UTC30m
2026-07-26 DAL2158 OAK → SLC Jul 26, 15:56 UTCJul 26, 16:26 UTC30m
2026-07-26 DAL2158 OAK → SLC Jul 26, 14:15 UTCJul 26, 14:45 UTC30m
2026-07-26 DAL3156 ATL → STL Jul 26, 12:20 UTCJul 26, 13:05 UTC45m
2026-07-25 DAL3158 RIC → ATL Jul 25, 21:30 UTCJul 25, 22:10 UTC40m
2026-07-25 DAL3158 RIC → ATL Jul 25, 21:29 UTCJul 25, 22:08 UTC39m
2026-07-25 DAL9964 CVG → BOS Jul 25, 16:50 UTCJul 25, 17:35 UTC45m
2026-07-25 DAL3002 ATL → BNA Jul 25, 03:40 UTCJul 25, 04:15 UTC35m
2026-07-25 DAL3053 - Jul 25, 01:15 UTCJul 25, 01:55 UTC40m
2026-07-25 DAL3053 - Jul 25, 01:08 UTCJul 25, 01:51 UTC43m
2026-07-24 DAL3053 - Jul 24, 23:25 UTCJul 25, 00:00 UTC35m
2026-07-24 DAL3127 MLB → ATL Jul 24, 20:50 UTCJul 24, 21:55 UTC1h 5m
2026-07-24 DAL3127 MLB → ATL Jul 24, 17:00 UTCJul 24, 18:00 UTC1h 0m
2026-07-24 DAL1708 EWR → MSP Jul 24, 15:05 UTCJul 24, 15:40 UTC35m
2026-07-24 DAL1708 EWR → MSP Jul 24, 13:30 UTCJul 24, 14:00 UTC30m
2026-07-24 DAL2275 ATL → AVL Jul 24, 11:45 UTCJul 24, 12:25 UTC40m
2026-07-24 DAL2275 ATL → AVL Jul 24, 11:40 UTCJul 24, 12:22 UTC42m
2026-07-24 DAL2352 DTW → CLT Jul 24, 00:35 UTCJul 24, 02:00 UTC1h 25m
2026-07-23 DAL1787 MIA → HAV Jul 23, 21:40 UTCJul 23, 22:50 UTC1h 10m
2026-07-23 DAL1787 MIA → HAV Jul 23, 19:20 UTCJul 23, 20:20 UTC1h 0m
2026-07-23 DAL3166 ATL → STL Jul 23, 16:40 UTCJul 23, 18:00 UTC1h 20m
2026-07-23 DAL3166 ATL → STL Jul 23, 14:15 UTCJul 23, 15:25 UTC1h 10m
2026-07-23 DAL1256 BOS → LGA Jul 23, 11:35 UTCJul 23, 12:55 UTC1h 20m
2026-07-23 DAL1321 DTW → RSW Jul 23, 00:05 UTCJul 23, 01:35 UTC1h 30m
2026-07-22 DAL1430 TPA → BOS Jul 22, 21:10 UTCJul 22, 22:40 UTC1h 30m
2026-07-22 DAL1429 BOS → RSW Jul 22, 18:25 UTCJul 22, 19:40 UTC1h 15m
2026-07-22 DAL1429 BOS → RSW Jul 22, 18:20 UTCJul 22, 19:28 UTC1h 8m
2026-07-22 DAL3137 ATL → CLT Jul 22, 15:40 UTCJul 22, 17:05 UTC1h 25m
2026-07-22 DAL3137 ATL → CLT Jul 22, 13:10 UTCJul 22, 14:30 UTC1h 20m
2026-07-21 DAL909 MSP → BOS Jul 21, 16:05 UTCJul 21, 17:55 UTC1h 50m
2026-07-21 DAL1119 MCO → CVG Jul 21, 13:25 UTCJul 21, 14:55 UTC1h 30m
2026-07-20 DAL1621 ORF → DTW Jul 20, 21:25 UTCJul 20, 22:55 UTC1h 30m
2026-07-20 DAL1621 ORF → DTW Jul 20, 21:23 UTCJul 20, 22:50 UTC1h 27m
2026-07-20 DAL1621 - Jul 20, 18:50 UTCJul 20, 20:15 UTC1h 25m
2026-07-20 DAL1639 SJC → ATL Jul 20, 14:00 UTCJul 20, 15:15 UTC1h 15m
2026-07-20 DAL3144 ATL → CLT Jul 20, 11:50 UTCJul 20, 12:30 UTC40m
2026-07-20 DAL3144 ATL → CLT Jul 20, 11:46 UTCJul 20, 12:30 UTC44m
2026-07-20 DAL1132 - Jul 20, 04:20 UTCJul 20, 04:50 UTC30m
2026-07-20 DAL1132 BHM → ATL Jul 20, 04:16 UTCJul 20, 04:49 UTC33m
2026-07-20 DAL1132 - Jul 20, 03:00 UTCJul 20, 03:25 UTC25m
2026-07-19 DAL2094 - Jul 19, 19:30 UTCJul 19, 21:20 UTC1h 50m
2026-07-19 DAL2094 DSM → ATL Jul 19, 19:30 UTCJul 19, 21:09 UTC1h 39m
2026-07-19 DAL2094 ATL → DSM Jul 19, 16:40 UTCJul 19, 18:20 UTC1h 40m
2026-07-19 DAL3077 ATL → AVL Jul 19, 14:15 UTCJul 19, 14:50 UTC35m
2026-07-19 DAL3077 ATL → AVL Jul 19, 12:25 UTCJul 19, 12:55 UTC30m
2026-07-19 DAL2712 - Jul 19, 09:45 UTCJul 19, 10:15 UTC30m
2026-07-19 DAL3116 - Jul 19, 03:10 UTCJul 19, 03:40 UTC30m
2026-07-19 DAL2467 - Jul 19, 00:50 UTCJul 19, 01:35 UTC45m

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 N944AT page for operator, model, and routing details .

Mode-S AD1C16 frequently asked

What is Mode-S code AD1C16?
AD1C16 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N944AT.
Where is Mode-S AD1C16 registered?
Mode-S code AD1C16 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 AD1C16 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD1C16, octal 53216026, decimal 11,344,918.
What flights does AD1C16 operate?
Mode-S AD1C16 has broadcast 20 distinct callsigns, including DAL3151, DAL2182, DAL2968, DAL2331, DAL3137.