Apparatus

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sensors Mode-S transponder

A8DF4B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N6709 · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
A8DF4B
Octal
52157513
Decimal
11,067,211
Country
US
Tail
N6709
Type
B752
Broadcasting now · callsign DAL2272 · 39,000 ft
Flights observed
485
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Current position

A8DF4B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A8DF4B 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
DAL625 - 13 2026-07-06
DAL624 - 13 2026-07-06
DAL1823 Delta Air Lines 11 2026-07-07
DAL1930 Delta Air Lines 10 2026-07-07
DAL1386 Delta Air Lines 8 2026-06-05
DAL391 - 7 2026-06-25
DAL348 Delta Air Lines 7 2026-07-24
DAL2856 - 7 2026-07-16
DAL1889 - 7 2026-07-11
DAL1757 Delta Air Lines 7 2026-05-03
DAL1089 Delta Air Lines 7 2026-05-29
DAL1902 Delta Air Lines 6 2026-07-04
DAL1831 - 6 2026-06-26
DAL982 - 5 2026-07-22
DAL929 Delta Air Lines 5 2026-06-08
DAL894 Delta Air Lines 5 2026-05-09
DAL857 Delta Air Lines 5 2026-07-24
DAL492 - 5 2026-06-18
DAL1937 Delta Air Lines 5 2026-07-17
DAL1791 Delta Air Lines 5 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1135 DTW → PHX Jul 26, 21:30 UTCJul 26, 22:45 UTC1h 15m
2026-07-26 DAL1031 ATL → CHS Jul 26, 18:35 UTCJul 26, 20:10 UTC1h 35m
2026-07-26 DAL1031 ATL → CHS Jul 26, 18:33 UTCJul 26, 20:10 UTC1h 37m
2026-07-26 DAL755 LAS → ATL Jul 26, 13:25 UTCJul 26, 16:50 UTC3h 25m
2026-07-25 DAL549 ATL → LGA Jul 25, 20:00 UTCJul 25, 23:30 UTC3h 30m
2026-07-24 DAL315 JFK → SLC Jul 24, 22:50 UTCJul 25, 18:00 UTC19h 10m
2026-07-24 DAL315 JFK → SLC Jul 24, 22:40 UTCJul 25, 18:00 UTC19h 20m
2026-07-24 DAL348 PHX → ATL Jul 24, 17:35 UTCJul 24, 21:00 UTC3h 25m
2026-07-24 DAL348 PHX → ATL Jul 24, 12:50 UTCJul 24, 16:05 UTC3h 15m
2026-07-24 DAL857 ATL → CVG Jul 24, 08:05 UTCJul 24, 11:35 UTC3h 30m
2026-07-24 DAL857 ATL → CVG Jul 24, 08:01 UTCJul 24, 11:31 UTC3h 30m
2026-07-24 DAL825 LGA → MSP Jul 24, 02:47 UTCJul 24, 06:19 UTC3h 32m
2026-07-24 DAL825 LGA → MSP Jul 24, 02:50 UTCJul 24, 06:25 UTC3h 35m
2026-07-23 DAL1785 UVF → ATL Jul 23, 20:50 UTCJul 24, 00:10 UTC3h 20m
2026-07-23 DAL2350 IND → ATL Jul 23, 13:50 UTCJul 23, 17:10 UTC3h 20m
2026-07-23 DAL1385 JFK → TPA Jul 23, 09:45 UTCJul 23, 11:05 UTC1h 20m
2026-07-23 DAL1217 ATL → MSY Jul 23, 02:50 UTCJul 23, 04:05 UTC1h 15m
2026-07-22 DAL983 LGA → MSP Jul 22, 20:25 UTCJul 23, 00:50 UTC4h 25m
2026-07-22 DAL982 ATL → BOG Jul 22, 14:20 UTCJul 22, 18:40 UTC4h 20m
2026-07-22 DAL1611 MCO → LGA Jul 22, 11:10 UTCJul 22, 12:05 UTC55m
2026-07-21 DAL778 DFW → LGA Jul 21, 23:00 UTCJul 22, 02:15 UTC3h 15m
2026-07-21 DAL549 ATL → LAS Jul 21, 18:00 UTCJul 21, 21:30 UTC3h 30m
2026-07-21 DAL1213 MCO → ATL Jul 21, 15:25 UTCJul 21, 16:25 UTC1h 0m
2026-07-21 DAL1213 ATL → MCO Jul 21, 12:30 UTCJul 21, 13:30 UTC1h 0m
2026-07-21 DAL1168 FLL → ATL Jul 21, 09:35 UTCJul 21, 10:55 UTC1h 20m
2026-07-21 DAL1168 FLL → ATL Jul 21, 09:32 UTCJul 21, 10:58 UTC1h 26m
2026-07-21 DAL1229 ATL → FLL Jul 21, 05:25 UTCJul 21, 06:45 UTC1h 20m
2026-07-20 DAL983 LGA → MSP Jul 20, 23:10 UTCJul 21, 03:25 UTC4h 15m
2026-07-20 DAL982 ATL → BOG Jul 20, 17:35 UTCJul 20, 21:45 UTC4h 10m
2026-07-20 DAL982 ATL → BOG Jul 20, 17:32 UTCJul 20, 21:46 UTC4h 14m
2026-07-20 DAL1726 TPA → ATL Jul 20, 10:25 UTCJul 20, 11:30 UTC1h 5m
2026-07-20 DAL1720 ATL → TPA Jul 20, 02:15 UTCJul 20, 03:10 UTC55m
2026-07-19 DAL1227 TPA → ATL Jul 19, 16:50 UTCJul 19, 17:55 UTC1h 5m
2026-07-19 DAL1227 TPA → ATL Jul 19, 16:49 UTCJul 19, 17:52 UTC1h 3m
2026-07-19 DAL1227 ATL → TPA Jul 19, 14:25 UTCJul 19, 15:25 UTC1h 0m
2026-07-18 DAL1794 ATL → BDL Jul 18, 20:45 UTCJul 19, 00:40 UTC3h 55m
2026-07-18 DAL1931 ATL → SJO Jul 18, 15:15 UTCJul 18, 19:00 UTC3h 45m
2026-07-18 DAL965 - Jul 18, 11:30 UTCJul 18, 12:45 UTC1h 15m
2026-07-18 DAL965 DTW → ATL Jul 18, 11:30 UTCJul 18, 13:03 UTC1h 33m
2026-07-18 DAL1566 - Jul 18, 06:15 UTCJul 18, 09:35 UTC3h 20m
2026-07-18 DAL757 JFK → SFO Jul 18, 01:10 UTCJul 18, 04:20 UTC3h 11m
2026-07-18 DAL757 JFK → SFO Jul 18, 01:07 UTCJul 18, 04:14 UTC3h 7m
2026-07-17 DAL1756 SJO → ATL Jul 17, 19:30 UTCJul 17, 23:05 UTC3h 35m
2026-07-17 DAL1756 SJO → ATL Jul 17, 19:26 UTCJul 17, 23:00 UTC3h 34m
2026-07-17 DAL1937 BOS → MSP Jul 17, 14:09 UTCJul 17, 17:40 UTC3h 31m
2026-07-17 DAL1937 BOS → MSP Jul 17, 14:10 UTCJul 17, 17:44 UTC3h 35m
2026-07-17 DAL1611 - Jul 17, 10:30 UTCJul 17, 12:00 UTC1h 30m
2026-07-17 DAL1611 DTW → ATL Jul 17, 10:27 UTCJul 17, 11:59 UTC1h 32m
2026-07-16 DAL785 PHX → DTW Jul 16, 22:30 UTCJul 17, 01:55 UTC3h 25m
2026-07-16 DAL785 PHX → DTW Jul 16, 22:28 UTCJul 17, 01:54 UTC3h 26m

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 N6709 page for operator, model, and routing details .

Mode-S A8DF4B frequently asked

What is Mode-S code A8DF4B?
A8DF4B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N6709.
Where is Mode-S A8DF4B registered?
Mode-S code A8DF4B 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 A8DF4B broadcasting right now?
Yes. Mode-S A8DF4B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8DF4B, octal 52157513, decimal 11,067,211.
What flights does A8DF4B operate?
Mode-S A8DF4B has broadcast 20 distinct callsigns, including DAL625, DAL624, DAL1823, DAL1930, DAL1386.