Apparatus

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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 Jul 26, 21:05 UTC
Flights observed
317
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:05 UTC

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
DAL679 Delta Air Lines 11 2026-07-22
DAL713 - 10 2026-07-05
DAL960 - 9 2026-07-07
DAL636 Delta Air Lines 9 2026-06-27
DAL668 Delta Air Lines 8 2026-07-07
DAL633 - 8 2026-07-11
DAL405 - 8 2026-07-23
DAL35 Delta Air Lines 7 2026-06-15
DAL205 Delta Air Lines 7 2026-07-24
DAL1556 Delta Air Lines 7 2026-05-04
DAL938 - 6 2026-07-06
DAL93 - 6 2026-07-20
DAL783 Delta Air Lines 6 2026-05-05
DAL773 - 6 2026-07-06
DAL632 - 6 2026-07-12
DAL204 Delta Air Lines 6 2026-07-23
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL155 DUB → BOS Jul 26, 14:15 UTCJul 26, 20:55 UTC6h 40m
2026-07-26 DAL154 BOS → DUB Jul 26, 05:05 UTCJul 26, 10:00 UTC4h 56m
2026-07-26 DAL154 BOS → DUB Jul 26, 05:04 UTCJul 26, 10:27 UTC5h 23m
2026-07-25 DAL123 EDI → BOS Jul 25, 12:00 UTCJul 25, 18:45 UTC6h 45m
2026-07-25 DAL208 JFK → EDI Jul 25, 03:55 UTCJul 25, 10:05 UTC6h 10m
2026-07-24 DAL205 ARN → JFK Jul 24, 08:35 UTCJul 24, 17:05 UTC8h 30m
2026-07-24 DAL205 ARN → JFK Jul 24, 08:34 UTCJul 24, 17:03 UTC8h 29m
2026-07-23 DAL204 JFK → ARN Jul 23, 22:55 UTCJul 24, 05:30 UTC6h 35m
2026-07-23 DAL405 OAK → JFK Jul 23, 14:25 UTCJul 23, 19:05 UTC4h 40m
2026-07-22 DAL679 ATL → SEA Jul 22, 19:30 UTCJul 23, 01:35 UTC6h 5m
2026-07-22 DAL287 SPN → NRT Jul 22, 13:35 UTCJul 22, 15:40 UTC2h 5m
2026-07-22 DAL287 SPN → NRT Jul 22, 07:22 UTCJul 22, 15:41 UTC8h 19m
2026-07-21 DAL286 NRT → SPN Jul 21, 21:10 UTCJul 22, 04:35 UTC7h 25m
2026-07-21 DAL286 NRT → SPN Jul 21, 21:07 UTCJul 22, 04:36 UTC7h 29m
2026-07-21 DAL205 ARN → JFK Jul 21, 08:30 UTCJul 21, 10:00 UTC1h 30m
2026-07-21 DAL205 ARN → JFK Jul 21, 08:29 UTCJul 21, 16:41 UTC8h 12m
2026-07-21 DAL205 ARN → JFK Jul 21, 08:29 UTCJul 21, 16:57 UTC8h 28m
2026-07-20 DAL204 JFK → ARN Jul 20, 22:50 UTCJul 21, 06:05 UTC7h 15m
2026-07-20 DAL204 JFK → ARN Jul 20, 22:50 UTCJul 21, 00:00 UTC1h 10m
2026-07-20 DAL93 - Jul 20, 11:30 UTCJul 20, 13:50 UTC2h 20m
2026-07-20 DAL93 BER → JFK Jul 20, 11:28 UTCJul 20, 19:36 UTC8h 8m
2026-07-20 DAL92 JFK → BER Jul 20, 01:55 UTCJul 20, 09:25 UTC7h 30m
2026-07-19 DAL287 MXP → JFK Jul 19, 12:20 UTCJul 19, 20:35 UTC8h 15m
2026-07-19 DAL287 - Jul 19, 12:20 UTCJul 19, 14:00 UTC1h 40m
2026-07-19 DAL286 NRT → SPN Jul 19, 01:35 UTCJul 19, 09:09 UTC7h 34m
2026-07-19 DAL286 NRT → SPN Jul 19, 01:35 UTCJul 19, 09:05 UTC7h 30m
2026-07-18 DAL245 - Jul 18, 09:30 UTCJul 18, 19:40 UTC10h 10m
2026-07-18 DAL245 CTA → JFK Jul 18, 09:23 UTCJul 18, 19:36 UTC10h 13m
2026-07-17 DAL244 - Jul 17, 22:49 UTCJul 18, 07:05 UTC8h 16m
2026-07-17 DAL405 OAK → JFK Jul 17, 14:30 UTCJul 17, 19:49 UTC5h 20m
2026-07-17 DAL405 SFO → JFK Jul 17, 14:26 UTCJul 17, 19:47 UTC5h 21m
2026-07-16 DAL679 JFK → SFO Jul 16, 19:20 UTCJul 17, 00:35 UTC5h 15m
2026-07-16 DAL205 ARN → JFK Jul 16, 09:10 UTCJul 16, 17:05 UTC7h 55m
2026-07-15 DAL204 JFK → ARN Jul 15, 23:23 UTCJul 16, 06:44 UTC7h 21m
2026-07-15 DAL204 JFK → ARN Jul 15, 23:25 UTCJul 16, 06:45 UTC7h 20m
2026-07-15 DAL209 EDI → JFK Jul 15, 13:15 UTCJul 15, 20:10 UTC6h 55m
2026-07-15 DAL34 ATL → EDI Jul 15, 03:15 UTCJul 15, 10:55 UTC7h 40m
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

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 Jul 26, 21:05 UTC.
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 DAL679, DAL713, DAL960, DAL636, DAL668.