Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A173A8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N193DN · BOEING 767-300 · operated by DELTA AIR LINES INC

Hex
A173A8
Octal
50271650
Decimal
10,580,904
Country
US
Tail
N193DN
Type
B763
No current signal · last broadcast 1d ago
Flights observed
280
Distinct callsigns
20
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A173A8.

Country allocation

The ICAO 24-bit address A173A8 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
DAL713 - 10 2026-07-05
DAL960 - 9 2026-07-07
DAL679 Delta Air Lines 9 2026-05-25
DAL636 Delta Air Lines 9 2026-06-27
DAL668 Delta Air Lines 8 2026-07-07
DAL633 - 8 2026-07-11
DAL35 Delta Air Lines 7 2026-06-15
DAL1556 Delta Air Lines 7 2026-05-04
DAL938 - 6 2026-07-06
DAL783 Delta Air Lines 6 2026-05-05
DAL773 - 6 2026-07-06
DAL632 - 6 2026-07-12
DAL1634 Delta Air Lines 6 2026-05-05
DAL670 Delta Air Lines 5 2026-04-25
DAL658 Delta Air Lines 5 2026-05-04
DAL650 Delta Air Lines 5 2026-06-28
DAL405 Delta Air Lines 5 2026-05-26
DAL289 Delta Air Lines 5 2026-06-04
DAL288 Delta Air Lines 5 2026-06-05
DAL991 - 4 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 DAL632 - Jul 12, 08:05 UTCJul 12, 11:15 UTC3h 10m
2026-07-11 DAL633 ATL → UIO Jul 11, 19:01 UTCJul 11, 23:38 UTC4h 37m
2026-07-11 DAL633 - Jul 11, 19:00 UTCJul 11, 20:00 UTC1h 0m
2026-07-10 DAL632 ATL → ATL Jul 10, 19:00 UTCJul 11, 11:55 UTC16h 56m
2026-07-10 DAL632 UIO → ATL Jul 10, 06:02 UTCJul 10, 10:43 UTC4h 41m
2026-07-09 DAL633 ATL → ATL Jul 9, 21:45 UTCJul 10, 10:45 UTC13h 0m
2026-07-07 DAL531 SFO → ATL Jul 7, 21:50 UTCJul 8, 01:55 UTC4h 5m
2026-07-07 DAL668 JFK → LAS Jul 7, 11:30 UTCJul 7, 17:00 UTC5h 30m
2026-07-07 DAL960 LAX → JFK Jul 7, 04:30 UTCJul 7, 09:20 UTC4h 50m
2026-07-06 DAL773 JFK → LAX Jul 6, 13:50 UTCJul 6, 19:05 UTC5h 15m
2026-07-06 DAL938 - Jul 6, 06:50 UTCJul 6, 08:15 UTC1h 25m
2026-07-05 DAL938 - Jul 5, 22:50 UTCJul 6, 05:15 UTC6h 25m
2026-07-05 DAL713 - Jul 5, 13:05 UTCJul 5, 18:10 UTC5h 5m
2026-07-05 DAL960 - Jul 5, 04:20 UTCJul 5, 09:10 UTC4h 50m
2026-07-04 DAL767 - Jul 4, 16:30 UTCJul 4, 21:55 UTC5h 25m
2026-07-04 DAL915 - Jul 4, 08:00 UTCJul 4, 12:55 UTC4h 55m
2026-07-04 DAL707 JFK → LAX Jul 4, 01:20 UTCJul 4, 06:30 UTC5h 10m
2026-07-03 DAL951 LAX → JFK Jul 3, 16:40 UTCJul 3, 21:45 UTC5h 5m
2026-07-03 DAL752 JFK → LAX Jul 3, 02:35 UTCJul 3, 07:50 UTC5h 15m
2026-07-02 DAL209 EDI → JFK Jul 2, 13:20 UTCJul 2, 20:20 UTC7h 0m
2026-07-02 DAL34 ATL → EDI Jul 2, 03:15 UTCJul 2, 10:35 UTC7h 20m
2026-07-01 DAL395 LAX → ATL Jul 1, 20:40 UTCJul 2, 00:25 UTC3h 45m
2026-07-01 DAL395 LAX → ATL Jul 1, 20:37 UTCJul 2, 00:25 UTC3h 48m
2026-07-01 DAL713 JFK → LAX Jul 1, 12:40 UTCJul 1, 18:00 UTC5h 20m
2026-07-01 DAL713 JFK → LAX Jul 1, 12:38 UTCJul 1, 17:46 UTC5h 8m
2026-07-01 DAL960 - Jul 1, 04:25 UTCJul 1, 09:10 UTC4h 45m
2026-06-30 DAL773 - Jun 30, 13:20 UTCJun 30, 18:35 UTC5h 15m
2026-06-29 DAL938 LAX → JFK Jun 29, 22:55 UTCJun 30, 03:40 UTC4h 46m
2026-06-29 DAL767 JFK → LAX Jun 29, 15:49 UTCJun 29, 21:19 UTC5h 30m
2026-06-29 DAL915 - Jun 29, 07:30 UTCJun 29, 12:05 UTC4h 35m
2026-06-28 DAL773 JFK → LAX Jun 28, 13:52 UTCJun 28, 19:07 UTC5h 15m
2026-06-28 DAL773 JFK → LAX Jun 28, 13:55 UTCJun 28, 19:20 UTC5h 25m
2026-06-28 DAL650 JFK → ATL Jun 28, 02:44 UTCJun 28, 11:55 UTC9h 10m
2026-06-28 DAL650 JFK → ATL Jun 28, 02:41 UTCJun 28, 11:47 UTC9h 6m
2026-06-27 DAL636 SEA → ANC Jun 27, 14:45 UTCJun 28, 00:55 UTC10h 10m
2026-06-27 DAL636 SEA → ANC Jun 27, 14:41 UTCJun 28, 00:50 UTC10h 9m
2026-06-27 DAL650 JFK → ATL Jun 27, 06:19 UTCJun 27, 11:14 UTC4h 55m
2026-06-27 DAL650 JFK → ATL Jun 27, 02:14 UTCJun 27, 02:25 UTC10m
2026-06-27 DAL650 JFK → ATL Jun 27, 02:13 UTCJun 27, 11:11 UTC8h 58m
2026-06-26 DAL307 - Jun 26, 14:50 UTCJun 26, 19:39 UTC4h 50m
2026-06-26 DAL307 DTW → HNL Jun 26, 14:45 UTCJun 26, 23:51 UTC9h 6m
2026-06-26 DAL310 - Jun 26, 02:44 UTCJun 26, 10:55 UTC8h 10m
2026-06-26 DAL310 HNL → DTW Jun 26, 02:43 UTCJun 26, 10:56 UTC8h 13m
2026-06-25 DAL480 - Jun 25, 19:54 UTCJun 26, 00:59 UTC5h 5m
2026-06-25 DAL480 LAX → HNL Jun 25, 19:53 UTCJun 26, 00:58 UTC5h 5m
2026-06-25 DAL713 - Jun 25, 12:15 UTCJun 25, 18:00 UTC5h 45m
2026-06-24 DAL691 SFO → JFK Jun 24, 21:04 UTCJun 25, 01:50 UTC4h 45m
2026-06-24 DAL691 SFO → JFK Jun 24, 21:04 UTCJun 25, 01:46 UTC4h 42m
2026-06-24 DAL669 JFK → SFO Jun 24, 13:14 UTCJun 24, 19:15 UTC6h 0m
2026-06-24 DAL365 - Jun 24, 06:04 UTCJun 24, 10:45 UTC4h 40m

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 N193DN page for operator, model, and routing details .

Mode-S A173A8 frequently asked

What is Mode-S code A173A8?
A173A8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N193DN.
Where is Mode-S A173A8 registered?
Mode-S code A173A8 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 A173A8 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A173A8, octal 50271650, decimal 10,580,904.
What flights does A173A8 operate?
Mode-S A173A8 has broadcast 20 distinct callsigns, including DAL713, DAL960, DAL679, DAL636, DAL668.