Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACC1F3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N921AT · BOEING 717-200 · operated by DELTA AIR LINES INC

Hex
ACC1F3
Octal
53140763
Decimal
11,321,843
Country
US
Tail
N921AT
Type
B712
Broadcasting now · callsign DAL3131 · 17,525 ft
Flights observed
622
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

ACC1F3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ACC1F3 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
DAL3143 Delta Air Lines 16 2026-06-07
DAL3051 - 9 2026-07-12
DAL3151 - 8 2026-06-19
DAL3116 - 8 2026-07-09
DAL2718 - 8 2026-07-05
DAL1290 - 8 2026-06-21
DAL3089 Delta Air Lines 7 2026-06-12
DAL2763 - 7 2026-06-28
DAL2220 - 7 2026-07-10
DAL1716 Delta Air Lines 7 2026-06-08
DAL940 Delta Air Lines 6 2026-05-28
DAL3133 - 6 2026-07-12
DAL3127 - 6 2026-07-13
DAL2837 Delta Air Lines 6 2026-06-10
DAL2741 Delta Air Lines 6 2026-06-22
DAL2725 Delta Air Lines 6 2026-05-29
DAL2417 - 6 2026-07-07
DAL2182 - 6 2026-07-11
DAL2128 - 6 2026-07-08
DAL2006 Delta Air Lines 6 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL1516 AIK → ATL Jul 14, 02:05 UTCJul 14, 02:40 UTC35m
2026-07-14 DAL1516 - Jul 14, 00:35 UTCJul 14, 01:05 UTC30m
2026-07-13 DAL3127 - Jul 13, 21:35 UTCJul 13, 22:50 UTC1h 15m
2026-07-13 DAL3127 - Jul 13, 17:00 UTCJul 13, 18:05 UTC1h 5m
2026-07-13 DAL1708 HSV → ATL Jul 13, 15:05 UTCJul 13, 15:40 UTC35m
2026-07-13 DAL1708 - Jul 13, 13:20 UTCJul 13, 13:55 UTC35m
2026-07-13 DAL3043 MLB → ATL Jul 13, 01:10 UTCJul 13, 02:20 UTC1h 10m
2026-07-12 DAL3043 ATL → MLB Jul 12, 23:10 UTCJul 13, 00:20 UTC1h 10m
2026-07-12 DAL2157 - Jul 12, 20:20 UTCJul 12, 21:05 UTC45m
2026-07-12 DAL2157 - Jul 12, 16:45 UTCJul 12, 17:30 UTC45m
2026-07-12 DAL3051 - Jul 12, 14:35 UTCJul 12, 15:15 UTC40m
2026-07-12 DAL3051 VPS → ATL Jul 12, 14:30 UTCJul 12, 15:20 UTC50m
2026-07-12 DAL3051 - Jul 12, 12:25 UTCJul 12, 13:05 UTC40m
2026-07-12 DAL1666 - Jul 12, 10:25 UTCJul 12, 11:15 UTC50m
2026-07-12 DAL1666 MEM → ATL Jul 12, 10:20 UTCJul 12, 11:12 UTC52m
2026-07-12 DAL2001 - Jul 12, 05:10 UTCJul 12, 06:05 UTC55m
2026-07-12 DAL2001 ATL → MEM Jul 12, 05:10 UTCJul 12, 06:02 UTC52m
2026-07-12 DAL3133 - Jul 12, 01:15 UTCJul 12, 02:01 UTC45m
2026-07-11 DAL3133 - Jul 11, 19:40 UTCJul 11, 21:25 UTC1h 45m
2026-07-11 DAL1637 - Jul 11, 16:25 UTCJul 11, 18:05 UTC1h 40m
2026-07-11 DAL1637 ATL → ICT Jul 11, 13:30 UTCJul 11, 15:10 UTC1h 40m
2026-07-11 DAL1721 - Jul 11, 11:10 UTCJul 11, 12:00 UTC50m
2026-07-11 DAL1721 MOB → ATL Jul 11, 11:10 UTCJul 11, 11:58 UTC48m
2026-07-11 DAL2029 - Jul 11, 05:40 UTCJul 11, 06:20 UTC40m
2026-07-11 DAL2182 - Jul 11, 03:30 UTCJul 11, 04:05 UTC35m
2026-07-11 DAL2182 HSV → ATL Jul 11, 03:29 UTCJul 11, 03:58 UTC29m
2026-07-11 DAL2182 - Jul 11, 01:15 UTCJul 11, 01:45 UTC30m
2026-07-11 DAL2182 ATL → HSV Jul 11, 01:15 UTCJul 11, 01:47 UTC32m
2026-07-10 DAL1125 - Jul 10, 23:05 UTCJul 10, 23:35 UTC30m
2026-07-10 DAL1125 CHA → ATL Jul 10, 23:05 UTCJul 10, 23:32 UTC27m
2026-07-10 DAL1125 - Jul 10, 18:40 UTCJul 10, 21:20 UTC2h 40m
2026-07-10 DAL1125 ATL → OMA Jul 10, 15:40 UTCJul 10, 17:30 UTC1h 50m
2026-07-10 DAL3036 - Jul 10, 13:55 UTCJul 10, 14:25 UTC30m
2026-07-10 DAL3036 ATL → HSV Jul 10, 12:10 UTCJul 10, 12:40 UTC30m
2026-07-10 DAL1537 - Jul 10, 10:15 UTCJul 10, 10:50 UTC35m
2026-07-10 DAL1596 - Jul 10, 02:25 UTCJul 10, 03:05 UTC40m
2026-07-10 DAL1596 ATL → TRI Jul 10, 02:25 UTCJul 10, 03:05 UTC40m
2026-07-10 DAL2220 - Jul 10, 00:20 UTCJul 10, 01:15 UTC55m
2026-07-09 DAL2220 - Jul 9, 22:30 UTCJul 9, 23:25 UTC55m
2026-07-09 DAL1640 LAX → JFK Jul 9, 19:00 UTCJul 9, 19:55 UTC55m
2026-07-09 DAL1640 LAX → JFK Jul 9, 16:55 UTCJul 9, 17:45 UTC50m
2026-07-09 DAL376 - Jul 9, 14:45 UTCJul 9, 15:40 UTC55m
2026-07-09 DAL376 - Jul 9, 12:15 UTCJul 9, 13:05 UTC50m
2026-07-09 DAL2712 - Jul 9, 09:45 UTCJul 9, 10:15 UTC30m
2026-07-09 DAL3116 - Jul 9, 02:55 UTCJul 9, 03:25 UTC30m
2026-07-08 DAL2128 - Jul 8, 23:40 UTCJul 9, 01:30 UTC1h 50m
2026-07-08 DAL2128 ICT → ATL Jul 8, 23:37 UTCJul 9, 01:24 UTC1h 47m
2026-07-08 DAL2128 ATL → ICT Jul 8, 20:40 UTCJul 8, 22:30 UTC1h 50m
2026-07-08 DAL304 ABE → ATL Jul 8, 17:20 UTCJul 8, 18:55 UTC1h 35m
2026-07-08 DAL304 ABE → ATL Jul 8, 17:19 UTCJul 8, 18:55 UTC1h 36m

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 N921AT page for operator, model, and routing details .

Mode-S ACC1F3 frequently asked

What is Mode-S code ACC1F3?
ACC1F3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N921AT.
Where is Mode-S ACC1F3 registered?
Mode-S code ACC1F3 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 ACC1F3 broadcasting right now?
Yes. Mode-S ACC1F3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACC1F3, octal 53140763, decimal 11,321,843.
What flights does ACC1F3 operate?
Mode-S ACC1F3 has broadcast 20 distinct callsigns, including DAL3143, DAL3051, DAL3151, DAL3116, DAL2718.