Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACA950

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N915AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
ACA950
Octal
53124520
Decimal
11,315,536
Country
US
Tail
N915AT
Type
B712
No current signal · last broadcast 2h ago
Flights observed
658
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S ACA950.

Country allocation

The ICAO 24-bit address ACA950 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
DAL3193 Delta Air Lines 13 2026-06-12
DAL3127 - 11 2026-07-11
DAL3012 Delta Air Lines 10 2026-06-06
DAL2539 - 8 2026-06-18
DAL1743 Delta Air Lines 8 2026-06-16
DAL3035 Delta Air Lines 7 2026-06-03
DAL3026 - 7 2026-07-04
DAL2793 Delta Air Lines 7 2026-05-21
DAL1182 - 7 2026-06-23
DAL3177 Delta Air Lines 6 2026-05-27
DAL3173 Delta Air Lines 6 2026-06-23
DAL3151 Delta Air Lines 6 2026-06-14
DAL3047 Delta Air Lines 6 2026-05-24
DAL3045 - 6 2026-07-12
DAL3030 Delta Air Lines 6 2026-05-06
DAL2939 - 6 2026-06-13
DAL2868 - 6 2026-06-27
DAL2862 - 6 2026-07-10
DAL2157 Delta Air Lines 6 2026-05-26
DAL1708 - 6 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL1283 - Jul 14, 03:00 UTCJul 14, 04:35 UTC1h 35m
2026-07-14 DAL3042 - Jul 14, 00:35 UTCJul 14, 01:10 UTC35m
2026-07-13 DAL3042 - Jul 13, 22:45 UTCJul 13, 23:15 UTC30m
2026-07-13 DAL2944 - Jul 13, 19:15 UTCJul 13, 19:55 UTC40m
2026-07-13 DAL2944 CAE → ATL Jul 13, 19:10 UTCJul 13, 19:52 UTC42m
2026-07-13 DAL2944 - Jul 13, 16:25 UTCJul 13, 16:55 UTC30m
2026-07-13 DAL3011 SAV → ATL Jul 13, 14:30 UTCJul 13, 15:05 UTC35m
2026-07-13 DAL3011 ATL → SAV Jul 13, 12:35 UTCJul 13, 13:15 UTC40m
2026-07-13 DAL2637 BNA → ATL Jul 13, 10:30 UTCJul 13, 11:15 UTC45m
2026-07-13 DAL3002 ATL → BNA Jul 13, 02:59 UTCJul 13, 03:38 UTC39m
2026-07-13 DAL3002 ATL → BNA Jul 13, 03:01 UTCJul 13, 03:40 UTC40m
2026-07-13 DAL2857 - Jul 13, 00:01 UTCJul 13, 01:30 UTC1h 30m
2026-07-12 DAL2857 - Jul 12, 21:20 UTCJul 12, 22:40 UTC1h 20m
2026-07-12 DAL3045 - Jul 12, 19:30 UTCJul 12, 19:45 UTC15m
2026-07-12 DAL3045 - Jul 12, 18:05 UTCJul 12, 19:45 UTC1h 40m
2026-07-12 DAL3045 ECP → ATL Jul 12, 18:02 UTCJul 12, 19:11 UTC1h 9m
2026-07-12 DAL3045 - Jul 12, 14:55 UTCJul 12, 15:35 UTC40m
2026-07-11 DAL3127 - Jul 11, 22:55 UTCJul 12, 00:15 UTC1h 20m
2026-07-11 DAL3127 - Jul 11, 17:50 UTCJul 11, 19:10 UTC1h 20m
2026-07-11 DAL1708 - Jul 11, 14:55 UTCJul 11, 15:25 UTC30m
2026-07-11 DAL1708 ATL → HSV Jul 11, 13:10 UTCJul 11, 13:40 UTC30m
2026-07-10 DAL2862 OKC → ATL Jul 10, 23:45 UTCJul 11, 01:30 UTC1h 45m
2026-07-10 DAL2862 ATL → OKC Jul 10, 20:40 UTCJul 10, 22:20 UTC1h 40m
2026-07-10 DAL1704 - Jul 10, 16:40 UTCJul 10, 18:20 UTC1h 40m
2026-07-10 DAL1704 ATL → DSM Jul 10, 13:40 UTCJul 10, 15:35 UTC1h 55m
2026-07-10 DAL1618 BHM → ATL Jul 10, 11:25 UTCJul 10, 12:05 UTC40m
2026-07-10 DAL3145 - Jul 10, 00:30 UTCJul 10, 01:50 UTC1h 20m
2026-07-09 DAL1621 ORF → DTW Jul 9, 22:00 UTCJul 9, 23:20 UTC1h 20m
2026-07-09 DAL1621 - Jul 9, 19:20 UTCJul 9, 20:50 UTC1h 30m
2026-07-09 DAL909 SAV → DTW Jul 9, 16:15 UTCJul 9, 17:50 UTC1h 35m
2026-07-09 DAL909 SAV → DTW Jul 9, 16:15 UTCJul 9, 17:46 UTC1h 31m
2026-07-09 DAL1119 - Jul 9, 13:10 UTCJul 9, 14:50 UTC1h 40m
2026-07-09 DAL1079 - Jul 9, 10:15 UTCJul 9, 11:45 UTC1h 30m
2026-07-09 DAL412 - Jul 9, 01:55 UTCJul 9, 03:10 UTC1h 15m
2026-07-08 DAL2822 STL → DTW Jul 8, 23:05 UTCJul 9, 00:10 UTC1h 5m
2026-07-08 DAL2822 - Jul 8, 21:00 UTCJul 8, 22:05 UTC1h 5m
2026-07-08 DAL844 - Jul 8, 18:35 UTCJul 8, 19:25 UTC50m
2026-07-08 DAL844 - Jul 8, 16:40 UTCJul 8, 17:30 UTC50m
2026-07-08 DAL2968 PHL → DTW Jul 8, 14:05 UTCJul 8, 15:15 UTC1h 10m
2026-07-08 DAL2968 DTW → PHL Jul 8, 11:20 UTCJul 8, 12:25 UTC1h 5m
2026-07-07 DAL1639 - Jul 7, 15:30 UTCJul 7, 16:40 UTC1h 10m
2026-07-07 DAL3144 - Jul 7, 12:30 UTCJul 7, 13:20 UTC50m
2026-07-07 DAL3144 ATL → CLT Jul 7, 12:30 UTCJul 7, 13:16 UTC46m
2026-07-07 DAL2712 - Jul 7, 10:50 UTCJul 7, 11:25 UTC35m
2026-07-07 DAL2712 AVL → ATL Jul 7, 10:47 UTCJul 7, 11:18 UTC31m
2026-07-07 DAL3071 - Jul 7, 00:00 UTCJul 7, 00:30 UTC30m
2026-07-06 DAL3071 ATL → AVL Jul 6, 23:56 UTCJul 7, 00:29 UTC33m
2026-07-06 DAL3027 - Jul 6, 21:25 UTCJul 6, 22:25 UTC1h 0m
2026-07-06 DAL3027 - Jul 6, 19:00 UTCJul 6, 20:05 UTC1h 5m
2026-07-06 DAL2632 ATL → OMA Jul 6, 15:45 UTCJul 6, 17:40 UTC1h 55m

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 N915AT page for operator, model, and routing details .

Mode-S ACA950 frequently asked

What is Mode-S code ACA950?
ACA950 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N915AT.
Where is Mode-S ACA950 registered?
Mode-S code ACA950 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 ACA950 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACA950, octal 53124520, decimal 11,315,536.
What flights does ACA950 operate?
Mode-S ACA950 has broadcast 20 distinct callsigns, including DAL3193, DAL3127, DAL3012, DAL2539, DAL1743.