Apparatus

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sensors Mode-S transponder

A13AF4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N179DN · BOEING 767-300 · operated by DELTA AIR LINES INC

Hex
A13AF4
Octal
50235364
Decimal
10,566,388
Country
US
Tail
N179DN
Type
B763
Broadcasting now · callsign DAL365 · 37,000 ft
Flights observed
313
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 08:05 UTC

Current position

A13AF4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A13AF4 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
DAL669 Delta Air Lines 39 2026-07-21
DAL78 Delta Air Lines 32 2026-07-26
DAL365 Delta Air Lines 31 2026-07-21
DAL531 Delta Air Lines 27 2026-07-21
DAL79 - 25 2026-07-20
DAL285 Delta Air Lines 23 2026-07-25
DAL691 Delta Air Lines 21 2026-07-24
DAL284 Delta Air Lines 19 2026-07-25
DAL672 Delta Air Lines 10 2026-07-24
DAL715 Delta Air Lines 9 2026-05-04
DAL488 Delta Air Lines 8 2026-06-05
DAL823 Delta Air Lines 6 2026-06-05
DAL668 Delta Air Lines 5 2026-06-24
DAL670 - 4 2026-07-04
DAL9909 Delta Air Lines 3 2026-06-09
DAL363 - 3 2026-07-15
DAL209 Delta Air Lines 3 2026-05-08
DAL996 Delta Air Lines 2 2026-05-01
DAL981 - 2 2026-07-23
DAL980 Delta Air Lines 2 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL78 JFK → PRG Jul 26, 00:50 UTCJul 26, 02:25 UTC1h 35m
2026-07-26 DAL78 JFK → PRG Jul 26, 00:47 UTCJul 26, 07:58 UTC7h 11m
2026-07-25 DAL285 SFO → JFK Jul 25, 13:25 UTCJul 25, 19:45 UTC6h 20m
2026-07-25 DAL284 ICN → DTW Jul 25, 06:10 UTCJul 25, 11:30 UTC5h 20m
2026-07-24 DAL691 DFW → LGA Jul 24, 23:15 UTCJul 25, 04:00 UTC4h 45m
2026-07-24 DAL672 SAN → JFK Jul 24, 17:20 UTCJul 24, 21:40 UTC4h 20m
2026-07-24 DAL633 ATL → UIO Jul 24, 03:00 UTCJul 24, 14:50 UTC11h 50m
2026-07-23 DAL980 BOG → ATL Jul 23, 18:55 UTCJul 23, 23:10 UTC4h 15m
2026-07-23 DAL980 BOG → ATL Jul 23, 18:53 UTCJul 23, 23:09 UTC4h 16m
2026-07-23 DAL981 ATL → BOG Jul 23, 02:10 UTCJul 23, 06:30 UTC4h 20m
2026-07-23 DAL981 ATL → BOG Jul 23, 02:09 UTCJul 23, 06:29 UTC4h 20m
2026-07-21 DAL531 LAX → SFO Jul 21, 21:25 UTCJul 22, 01:50 UTC4h 25m
2026-07-21 DAL669 MSP → SEA Jul 21, 13:45 UTCJul 21, 19:10 UTC5h 25m
2026-07-21 DAL365 ATL → MEX Jul 21, 05:55 UTCJul 21, 10:55 UTC5h 0m
2026-07-20 DAL365 ATL → MEX Jul 20, 22:25 UTCJul 21, 03:45 UTC5h 19m
2026-07-20 DAL79 PRG → JFK Jul 20, 11:20 UTCJul 20, 19:50 UTC8h 30m
2026-07-20 DAL79 PRG → JFK Jul 20, 11:20 UTCJul 20, 19:39 UTC8h 19m
2026-07-20 DAL78 - Jul 20, 01:40 UTCJul 20, 03:10 UTC1h 30m
2026-07-20 DAL78 JFK → PRG Jul 20, 01:40 UTCJul 20, 09:13 UTC7h 33m
2026-07-18 DAL285 - Jul 18, 12:15 UTCJul 18, 19:30 UTC7h 15m
2026-07-18 DAL284 - Jul 18, 04:25 UTCJul 18, 05:00 UTC35m
2026-07-18 DAL284 JFK → SNN Jul 18, 04:22 UTCJul 18, 10:19 UTC5h 57m
2026-07-17 DAL691 SFO → JFK Jul 17, 20:20 UTCJul 18, 01:30 UTC5h 10m
2026-07-17 DAL672 ATL → SFO Jul 17, 14:00 UTCJul 17, 18:15 UTC4h 15m
2026-07-17 DAL672 ATL → SFO Jul 17, 13:58 UTCJul 17, 18:15 UTC4h 17m
2026-07-16 DAL531 - Jul 16, 21:55 UTCJul 17, 02:15 UTC4h 20m
2026-07-16 DAL669 JFK → SFO Jul 16, 14:25 UTCJul 16, 19:40 UTC5h 15m
2026-07-16 DAL396 - Jul 16, 02:20 UTCJul 16, 07:15 UTC4h 55m
2026-07-15 DAL363 JFK → SFO Jul 15, 19:35 UTCJul 16, 00:50 UTC5h 15m
2026-07-15 DAL79 PRG → JFK Jul 15, 09:15 UTCJul 15, 17:35 UTC8h 20m
2026-07-15 DAL79 PRG → JFK Jul 15, 09:13 UTCJul 15, 17:33 UTC8h 20m
2026-07-14 DAL78 JFK → PRG Jul 14, 23:10 UTCJul 15, 06:55 UTC7h 45m
2026-07-14 DAL285 - Jul 14, 12:35 UTCJul 14, 18:55 UTC6h 20m
2026-07-14 DAL284 - Jul 14, 04:10 UTCJul 14, 09:55 UTC5h 45m
2026-07-14 DAL284 JFK → SNN Jul 14, 04:08 UTCJul 14, 09:58 UTC5h 50m
2026-07-13 DAL691 SFO → JFK Jul 13, 20:35 UTCJul 14, 01:55 UTC5h 20m
2026-07-13 DAL672 ATL → SFO Jul 13, 14:45 UTCJul 13, 19:00 UTC4h 15m
2026-07-12 DAL531 SFO → ATL Jul 12, 21:25 UTCJul 13, 01:40 UTC4h 15m
2026-07-12 DAL669 JFK → SFO Jul 12, 13:34 UTCJul 12, 18:49 UTC5h 15m
2026-07-12 DAL669 JFK → SFO Jul 12, 13:35 UTCJul 12, 18:50 UTC5h 15m
2026-07-10 DAL9978 - Jul 10, 12:05 UTCJul 10, 14:40 UTC2h 35m
2026-07-06 DAL78 JFK → PRG Jul 6, 00:45 UTCJul 6, 07:35 UTC6h 50m
2026-07-05 DAL365 SFO → JFK Jul 5, 05:20 UTCJul 5, 10:15 UTC4h 55m
2026-07-04 DAL670 JFK → SFO Jul 4, 20:10 UTCJul 5, 01:35 UTC5h 25m
2026-07-04 DAL670 JFK → SFO Jul 4, 20:08 UTCJul 5, 01:30 UTC5h 22m
2026-07-04 DAL79 PRG → JFK Jul 4, 09:05 UTCJul 4, 11:00 UTC1h 55m
2026-07-04 DAL79 PRG → JFK Jul 4, 09:05 UTCJul 4, 17:48 UTC8h 43m
2026-07-03 DAL78 JFK → PRG Jul 3, 23:15 UTCJul 4, 06:40 UTC7h 25m
2026-07-03 DAL285 - Jul 3, 12:15 UTCJul 3, 12:50 UTC35m
2026-07-03 DAL285 SNN → JFK Jul 3, 12:10 UTCJul 3, 19:00 UTC6h 50m

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 N179DN page for operator, model, and routing details .

Mode-S A13AF4 frequently asked

What is Mode-S code A13AF4?
A13AF4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N179DN.
Where is Mode-S A13AF4 registered?
Mode-S code A13AF4 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 A13AF4 broadcasting right now?
Yes. Mode-S A13AF4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A13AF4, octal 50235364, decimal 10,566,388.
What flights does A13AF4 operate?
Mode-S A13AF4 has broadcast 20 distinct callsigns, including DAL669, DAL78, DAL365, DAL531, DAL79.