Apparatus

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sensors Mode-S transponder

A1775F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N194DN · BOEING 767-300 · operated by DELTA AIR LINES INC

Hex
A1775F
Octal
50273537
Decimal
10,581,855
Country
US
Tail
N194DN
Type
B763
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
306
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S A1775F.

Country allocation

The ICAO 24-bit address A1775F 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
DAL668 - 16 2026-07-20
DAL246 - 11 2026-07-10
DAL650 Delta Air Lines 10 2026-06-01
DAL218 - 10 2026-07-13
DAL636 - 9 2026-07-15
DAL247 Delta Air Lines 9 2026-07-10
DAL219 - 9 2026-07-14
DAL938 Delta Air Lines 7 2026-07-19
DAL534 - 7 2026-07-16
DAL93 Delta Air Lines 6 2026-06-10
DAL52 Delta Air Lines 6 2026-05-29
DAL149 Delta Air Lines 6 2026-07-06
DAL960 - 5 2026-06-30
DAL767 - 5 2026-07-19
DAL623 - 5 2026-07-16
DAL416 - 5 2026-06-22
DAL395 Delta Air Lines 5 2026-07-23
DAL365 Delta Air Lines 5 2026-07-23
DAL208 Delta Air Lines 5 2026-06-16
DAL205 - 5 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL140 JFK → BRU Jul 26, 21:35 UTCJul 26, 21:45 UTC10m
2026-07-26 DAL980 BOG → ATL Jul 26, 14:20 UTCJul 26, 18:40 UTC4h 20m
2026-07-25 DAL981 ATL → BOG Jul 25, 20:00 UTCJul 26, 00:11 UTC4h 11m
2026-07-25 DAL981 ATL → BOG Jul 25, 20:00 UTCJul 25, 23:45 UTC3h 45m
2026-07-23 DAL395 LAX → ATL Jul 23, 21:10 UTCJul 23, 23:45 UTC2h 35m
2026-07-23 DAL395 LAX → ATL Jul 23, 21:05 UTCJul 24, 01:02 UTC3h 57m
2026-07-23 DAL773 DTW → PHX Jul 23, 14:10 UTCJul 23, 19:35 UTC5h 25m
2026-07-23 DAL365 ATL → MEX Jul 23, 07:10 UTCJul 23, 11:55 UTC4h 45m
2026-07-22 DAL365 ATL → MEX Jul 22, 22:10 UTCJul 23, 04:15 UTC6h 5m
2026-07-22 DAL9887 EWR → DTW Jul 22, 11:15 UTCJul 22, 19:40 UTC8h 25m
2026-07-21 DAL216 JFK → OLB Jul 21, 02:09 UTCJul 21, 10:05 UTC7h 56m
2026-07-21 DAL216 JFK → OLB Jul 21, 02:10 UTCJul 21, 10:00 UTC7h 50m
2026-07-20 DAL668 - Jul 20, 19:20 UTCJul 20, 23:55 UTC4h 34m
2026-07-20 DAL668 - Jul 20, 11:10 UTCJul 20, 16:30 UTC5h 20m
2026-07-19 DAL938 LAX → JFK Jul 19, 23:15 UTCJul 20, 04:05 UTC4h 50m
2026-07-19 DAL767 JFK → LAX Jul 19, 15:25 UTCJul 19, 20:25 UTC5h 0m
2026-07-19 DAL915 BOS → MCO Jul 19, 07:45 UTCJul 19, 12:35 UTC4h 50m
2026-07-19 DAL463 - Jul 19, 03:10 UTCJul 19, 04:05 UTC55m
2026-07-18 DAL425 - Jul 18, 16:15 UTCJul 18, 16:45 UTC30m
2026-07-18 DAL425 LAX → OGG Jul 18, 16:15 UTCJul 18, 21:22 UTC5h 7m
2026-07-18 DAL9966 - Jul 18, 05:15 UTCJul 18, 06:40 UTC1h 25m
2026-07-17 DAL397 - Jul 17, 09:50 UTCJul 17, 11:39 UTC1h 50m
2026-07-16 DAL623 - Jul 16, 22:59 UTCJul 17, 00:40 UTC1h 40m
2026-07-16 DAL623 SLC → OGG Jul 16, 22:56 UTCJul 17, 04:56 UTC6h 0m
2026-07-16 DAL534 - Jul 16, 05:50 UTCJul 16, 11:20 UTC5h 30m
2026-07-16 DAL534 HNL → SLC Jul 16, 05:49 UTCJul 16, 11:18 UTC5h 29m
2026-07-15 DAL636 - Jul 15, 15:10 UTCJul 16, 01:00 UTC9h 50m
2026-07-14 DAL219 CPH → JFK Jul 14, 07:00 UTCJul 14, 14:45 UTC7h 45m
2026-07-13 DAL218 JFK → CPH Jul 13, 21:25 UTCJul 14, 05:01 UTC7h 36m
2026-07-13 DAL218 - Jul 13, 21:25 UTCJul 13, 21:45 UTC20m
2026-07-13 DAL219 CPH → JFK Jul 13, 07:35 UTCJul 13, 15:25 UTC7h 50m
2026-07-13 DAL219 CPH → JFK Jul 13, 07:33 UTCJul 13, 15:22 UTC7h 49m
2026-07-12 DAL218 JFK → CPH Jul 12, 22:10 UTCJul 13, 05:35 UTC7h 25m
2026-07-12 DAL405 SFO → JFK Jul 12, 14:20 UTCJul 12, 19:25 UTC5h 5m
2026-07-12 DAL405 SFO → JFK Jul 12, 14:20 UTCJul 12, 19:20 UTC5h 0m
2026-07-11 DAL670 JFK → SFO Jul 11, 19:20 UTCJul 12, 01:15 UTC5h 55m
2026-07-11 DAL205 ARN → JFK Jul 11, 08:36 UTCJul 11, 16:54 UTC8h 18m
2026-07-11 DAL205 ARN → JFK Jul 11, 08:35 UTCJul 11, 16:50 UTC8h 15m
2026-07-10 DAL204 JFK → ARN Jul 10, 23:05 UTCJul 11, 06:10 UTC7h 5m
2026-07-10 DAL247 KEF → JFK Jul 10, 14:00 UTCJul 10, 14:25 UTC25m
2026-07-10 DAL247 KEF → JFK Jul 10, 14:00 UTCJul 10, 19:39 UTC5h 39m
2026-07-10 DAL246 - Jul 10, 07:40 UTCJul 10, 09:05 UTC1h 25m
2026-07-10 DAL246 JFK → KEF Jul 10, 07:38 UTCJul 10, 12:29 UTC4h 51m
2026-07-09 DAL939 LAX → JFK Jul 9, 21:00 UTCJul 10, 02:00 UTC5h 0m
2026-07-09 DAL773 JFK → LAX Jul 9, 13:40 UTCJul 9, 19:05 UTC5h 25m
2026-07-09 DAL365 - Jul 9, 06:00 UTCJul 9, 10:40 UTC4h 40m
2026-07-08 DAL365 - Jul 8, 21:10 UTCJul 9, 02:45 UTC5h 35m
2026-07-08 DAL287 MXP → JFK Jul 8, 09:06 UTCJul 8, 17:09 UTC8h 3m
2026-07-08 DAL287 MXP → JFK Jul 8, 09:05 UTCJul 8, 17:15 UTC8h 10m
2026-07-07 DAL286 JFK → MXP Jul 7, 23:10 UTCJul 8, 06:47 UTC7h 37m

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 N194DN page for operator, model, and routing details .

Mode-S A1775F frequently asked

What is Mode-S code A1775F?
A1775F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N194DN.
Where is Mode-S A1775F registered?
Mode-S code A1775F 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 A1775F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1775F, octal 50273537, decimal 10,581,855.
What flights does A1775F operate?
Mode-S A1775F has broadcast 20 distinct callsigns, including DAL668, DAL246, DAL650, DAL218, DAL636.