Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACC961

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N923AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
ACC961
Octal
53144541
Decimal
11,323,745
Country
US
Tail
N923AT
Type
B712
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
635
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S ACC961.

Country allocation

The ICAO 24-bit address ACC961 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
DAL3077 Delta Air Lines 10 2026-07-22
DAL940 - 9 2026-07-09
DAL3143 - 9 2026-07-09
DAL3051 - 9 2026-07-10
DAL1044 - 9 2026-07-11
DAL512 Delta Air Lines 8 2026-07-19
DAL3151 - 8 2026-07-17
DAL441 - 7 2026-07-08
DAL2741 Delta Air Lines 7 2026-05-21
DAL2563 - 7 2026-07-15
DAL2163 Delta Air Lines 7 2026-07-02
DAL1286 - 7 2026-07-19
DAL2862 - 6 2026-07-14
DAL2546 Delta Air Lines 6 2026-06-30
DAL2467 Delta Air Lines 6 2026-06-27
DAL2157 - 6 2026-07-18
DAL1405 - 6 2026-07-04
DAL1186 Delta Air Lines 6 2026-07-22
DAL1149 Delta Air Lines 6 2026-07-23
DAL3150 Delta Air Lines 5 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL3083 VPS → ATL Jul 26, 20:40 UTCJul 26, 21:15 UTC35m
2026-07-26 DAL3068 ATL → HSV Jul 26, 18:55 UTCJul 26, 19:30 UTC35m
2026-07-26 DAL3068 ATL → HSV Jul 26, 18:55 UTCJul 26, 19:33 UTC38m
2026-07-26 DAL3068 ATL → HSV Jul 26, 17:15 UTCJul 26, 17:50 UTC35m
2026-07-26 DAL1010 DFW → DTW Jul 26, 14:20 UTCJul 26, 14:55 UTC35m
2026-07-26 DAL1010 DFW → DTW Jul 26, 12:30 UTCJul 26, 13:05 UTC35m
2026-07-26 DAL2516 PHL → MSP Jul 26, 10:05 UTCJul 26, 11:00 UTC55m
2026-07-26 DAL1289 PHL → ATL Jul 26, 01:25 UTCJul 26, 02:30 UTC1h 5m
2026-07-25 DAL2037 TPA → BOS Jul 25, 22:15 UTCJul 25, 22:50 UTC35m
2026-07-25 DAL2037 TPA → BOS Jul 25, 19:50 UTCJul 25, 20:25 UTC35m
2026-07-25 DAL3060 GSO → ATL Jul 25, 17:55 UTCJul 25, 18:50 UTC55m
2026-07-25 DAL3060 GSO → ATL Jul 25, 17:53 UTCJul 25, 18:43 UTC50m
2026-07-25 DAL3060 GSO → ATL Jul 25, 15:50 UTCJul 25, 16:35 UTC45m
2026-07-25 DAL1610 SLC → OAK Jul 25, 12:15 UTCJul 25, 13:10 UTC55m
2026-07-25 DAL3093 ATL → SDF Jul 25, 01:15 UTCJul 25, 02:05 UTC50m
2026-07-24 DAL1868 SEA → CUN Jul 24, 23:10 UTCJul 25, 00:00 UTC50m
2026-07-24 DAL1868 SEA → CUN Jul 24, 20:10 UTCJul 24, 20:50 UTC40m
2026-07-24 DAL1704 DTW → FLL Jul 24, 16:30 UTCJul 24, 18:25 UTC1h 55m
2026-07-24 DAL1704 DTW → FLL Jul 24, 13:45 UTCJul 24, 15:30 UTC1h 45m
2026-07-24 DAL1259 LAX → MSY Jul 24, 11:00 UTCJul 24, 12:40 UTC1h 40m
2026-07-24 DAL2043 ATL → TUL Jul 24, 02:25 UTCJul 24, 04:00 UTC1h 35m
2026-07-24 DAL3043 ATL → MLB Jul 24, 00:10 UTCJul 24, 01:05 UTC55m
2026-07-23 DAL3043 ATL → MLB Jul 23, 23:55 UTCJul 24, 00:05 UTC10m
2026-07-23 DAL3043 ATL → MLB Jul 23, 21:55 UTCJul 23, 23:00 UTC1h 5m
2026-07-23 DAL2179 SFO → SLC Jul 23, 19:30 UTCJul 23, 20:10 UTC40m
2026-07-23 DAL2179 SFO → SLC Jul 23, 17:40 UTCJul 23, 18:20 UTC40m
2026-07-23 DAL1149 DTW → PBI Jul 23, 14:45 UTCJul 23, 15:35 UTC50m
2026-07-23 DAL1149 DTW → PBI Jul 23, 14:40 UTCJul 23, 15:34 UTC54m
2026-07-23 DAL2501 LGA → MSY Jul 23, 03:10 UTCJul 23, 04:00 UTC50m
2026-07-22 DAL1186 MSP → BOS Jul 22, 21:50 UTCJul 22, 23:20 UTC1h 30m
2026-07-22 DAL1186 MSP → BOS Jul 22, 19:10 UTCJul 22, 20:40 UTC1h 30m
2026-07-22 DAL1737 PHL → MSP Jul 22, 17:30 UTCJul 22, 18:05 UTC35m
2026-07-22 DAL1737 PHL → MSP Jul 22, 15:55 UTCJul 22, 16:20 UTC25m
2026-07-22 DAL3077 ATL → AVL Jul 22, 14:20 UTCJul 22, 14:50 UTC30m
2026-07-22 DAL3077 ATL → AVL Jul 22, 12:25 UTCJul 22, 12:55 UTC30m
2026-07-22 DAL3077 ATL → AVL Jul 22, 12:20 UTCJul 22, 12:53 UTC33m
2026-07-21 DAL3190 - Jul 21, 16:30 UTCJul 21, 17:15 UTC45m
2026-07-21 DAL3190 - Jul 21, 14:35 UTCJul 21, 15:15 UTC40m
2026-07-21 DAL3009 HSV → ATL Jul 21, 12:24 UTCJul 21, 12:51 UTC27m
2026-07-21 DAL3065 ATL → HSV Jul 21, 01:20 UTCJul 21, 01:50 UTC30m
2026-07-20 DAL1186 MSP → BOS Jul 20, 22:00 UTCJul 20, 23:40 UTC1h 40m
2026-07-20 DAL1186 MSP → BOS Jul 20, 19:00 UTCJul 20, 20:30 UTC1h 30m
2026-07-20 DAL3045 ECP → ATL Jul 20, 16:40 UTCJul 20, 17:25 UTC45m
2026-07-20 DAL3045 ATL → ECP Jul 20, 14:50 UTCJul 20, 15:30 UTC40m
2026-07-20 DAL1979 MSP → PUJ Jul 20, 10:30 UTCJul 20, 11:05 UTC35m
2026-07-20 DAL2257 - Jul 20, 02:55 UTCJul 20, 03:15 UTC20m
2026-07-20 DAL2257 ATL → BHM Jul 20, 02:52 UTCJul 20, 03:14 UTC22m
2026-07-19 DAL512 DAL → ATL Jul 19, 22:25 UTCJul 20, 00:15 UTC1h 50m
2026-07-19 DAL512 DAL → ATL Jul 19, 19:30 UTCJul 19, 21:10 UTC1h 40m
2026-07-19 DAL1286 - Jul 19, 16:00 UTCJul 19, 17:00 UTC1h 0m

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 N923AT page for operator, model, and routing details .

Mode-S ACC961 frequently asked

What is Mode-S code ACC961?
ACC961 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N923AT.
Where is Mode-S ACC961 registered?
Mode-S code ACC961 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 ACC961 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 ACC961, octal 53144541, decimal 11,323,745.
What flights does ACC961 operate?
Mode-S ACC961 has broadcast 20 distinct callsigns, including DAL3077, DAL940, DAL3143, DAL3051, DAL1044.