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 DAL836 · 26,625 ft
Flights observed
425
Distinct callsigns
20
Country
US
Last broadcast
12h ago

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
DAL1889 - 7 2026-07-11
DAL1757 Delta Air Lines 7 2026-05-03
DAL1089 Delta Air Lines 7 2026-05-29
DAL2856 Delta Air Lines 6 2026-06-17
DAL1902 Delta Air Lines 6 2026-07-04
DAL1831 - 6 2026-06-26
DAL929 Delta Air Lines 5 2026-06-08
DAL894 Delta Air Lines 5 2026-05-09
DAL492 - 5 2026-06-18
DAL348 - 5 2026-07-01
DAL1791 Delta Air Lines 5 2026-04-28
DAL1336 - 5 2026-07-09
DAL955 - 4 2026-07-10
DAL795 Delta Air Lines 4 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 DAL836 ATL → LAS Jul 13, 22:50 UTCJul 14, 02:45 UTC3h 55m
2026-07-13 DAL1032 MSP → ATL Jul 13, 14:00 UTCJul 13, 16:00 UTC2h 0m
2026-07-12 DAL2274 PHX → MSP Jul 12, 21:50 UTCJul 13, 00:35 UTC2h 45m
2026-07-12 DAL8771 ATL → PHX Jul 12, 14:27 UTCJul 12, 17:43 UTC3h 16m
2026-07-12 DAL8771 ATL → PHX Jul 12, 14:30 UTCJul 12, 17:45 UTC3h 15m
2026-07-12 DAL2286 JFK → ATL Jul 12, 10:20 UTCJul 12, 12:05 UTC1h 45m
2026-07-11 DAL1768 - Jul 11, 20:50 UTCJul 12, 00:15 UTC3h 25m
2026-07-11 DAL1889 ATL → CPX Jul 11, 15:35 UTCJul 11, 19:00 UTC3h 25m
2026-07-11 DAL744 TPA → ATL Jul 11, 12:50 UTCJul 11, 13:55 UTC1h 5m
2026-07-11 DAL744 TPA → ATL Jul 11, 12:51 UTCJul 11, 13:53 UTC1h 2m
2026-07-11 DAL1560 ATL → TPA Jul 11, 03:30 UTCJul 11, 04:30 UTC1h 0m
2026-07-10 DAL1756 - Jul 10, 19:25 UTCJul 10, 23:05 UTC3h 40m
2026-07-10 DAL1756 SJO → ATL Jul 10, 19:23 UTCJul 10, 23:07 UTC3h 44m
2026-07-10 DAL1937 - Jul 10, 14:15 UTCJul 10, 17:20 UTC3h 5m
2026-07-10 DAL1937 ATL → SJO Jul 10, 14:10 UTCJul 10, 17:39 UTC3h 29m
2026-07-10 DAL857 LAS → ATL Jul 10, 08:25 UTCJul 10, 12:00 UTC3h 35m
2026-07-10 DAL955 ATL → LAS Jul 10, 02:40 UTCJul 10, 06:15 UTC3h 35m
2026-07-09 DAL1101 ORF → ATL Jul 9, 21:20 UTCJul 9, 22:35 UTC1h 15m
2026-07-09 DAL1101 ATL → ORF Jul 9, 18:35 UTCJul 9, 19:50 UTC1h 15m
2026-07-09 DAL1336 ORF → ATL Jul 9, 14:40 UTCJul 9, 16:00 UTC1h 20m
2026-07-09 DAL1336 ORF → ATL Jul 9, 14:35 UTCJul 9, 15:55 UTC1h 20m
2026-07-09 DAL1336 ATL → ORF Jul 9, 11:50 UTCJul 9, 13:00 UTC1h 10m
2026-07-09 DAL879 LAS → ATL Jul 9, 05:15 UTCJul 9, 08:50 UTC3h 35m
2026-07-08 DAL549 ATL → LAS Jul 8, 17:30 UTCJul 8, 21:10 UTC3h 40m
2026-07-08 DAL549 ATL → LAS Jul 8, 17:29 UTCJul 8, 21:08 UTC3h 39m
2026-07-08 DAL1336 ORF → ATL Jul 8, 14:35 UTCJul 8, 15:55 UTC1h 20m
2026-07-08 DAL1336 ATL → ORF Jul 8, 11:55 UTCJul 8, 13:05 UTC1h 10m
2026-07-07 DAL1823 ATL → CVG Jul 7, 18:40 UTCJul 7, 21:50 UTC3h 10m
2026-07-07 DAL1823 ATL → CVG Jul 7, 18:32 UTCJul 7, 21:50 UTC3h 18m
2026-07-07 DAL1930 JFK → STT Jul 7, 14:05 UTCJul 7, 17:10 UTC3h 5m
2026-07-07 DAL1930 JFK → STT Jul 7, 14:02 UTCJul 7, 17:21 UTC3h 19m
2026-07-06 DAL624 - Jul 6, 21:35 UTCJul 7, 02:00 UTC4h 25m
2026-07-06 DAL625 JFK → MEX Jul 6, 14:55 UTCJul 6, 19:25 UTC4h 30m
2026-07-06 DAL498 - Jul 6, 07:10 UTCJul 6, 11:35 UTC4h 25m
2026-07-06 DAL955 ATL → LAS Jul 6, 01:55 UTCJul 6, 05:45 UTC3h 50m
2026-07-05 DAL777 BOS → ORD Jul 5, 19:10 UTCJul 5, 22:50 UTC3h 40m
2026-07-05 DAL777 BOS → ORD Jul 5, 14:15 UTCJul 5, 17:45 UTC3h 30m
2026-07-05 DAL1889 ATL → STT Jul 5, 03:10 UTCJul 5, 03:55 UTC45m
2026-07-05 DAL1889 ATL → STT Jul 5, 03:09 UTCJul 5, 03:52 UTC43m
2026-07-04 DAL1889 ATL → STT Jul 4, 20:10 UTCJul 4, 23:20 UTC3h 10m
2026-07-04 DAL1889 ATL → STT Jul 4, 20:00 UTCJul 4, 23:24 UTC3h 24m
2026-07-04 DAL1902 PVR → DTW Jul 4, 14:45 UTCJul 4, 17:55 UTC3h 10m
2026-07-04 DAL2286 JFK → ATL Jul 4, 10:20 UTCJul 4, 12:00 UTC1h 40m
2026-07-04 DAL795 BOS → ORD Jul 4, 01:55 UTCJul 4, 03:50 UTC1h 55m
2026-07-04 DAL795 BOS → ORD Jul 4, 01:52 UTCJul 4, 03:50 UTC1h 58m
2026-07-03 DAL795 BOS → ORD Jul 3, 19:40 UTCJul 3, 23:30 UTC3h 50m
2026-07-03 DAL945 ATL → LAS Jul 3, 14:10 UTCJul 3, 17:45 UTC3h 35m
2026-07-02 DAL1642 - Jul 2, 21:10 UTCJul 2, 22:10 UTC1h 0m
2026-07-02 DAL1642 MCO → ATL Jul 2, 21:06 UTCJul 2, 22:06 UTC1h 0m
2026-07-02 DAL1642 ATL → MCO Jul 2, 18:35 UTCJul 2, 19:35 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 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.