Apparatus

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sensors Mode-S transponder

A919CD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N686DA · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
A919CD
Octal
52214715
Decimal
11,082,189
Country
US
Tail
N686DA
Type
B752
No current signal · last broadcast 18d ago
Flights observed
332
Distinct callsigns
20
Country
US
Last broadcast
18d ago

Last known position

Most recent position reported by Mode-S A919CD.

Country allocation

The ICAO 24-bit address A919CD 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
DAL2204 Delta Air Lines 11 2026-07-22
DAL1591 - 8 2026-07-17
DAL1930 Delta Air Lines 7 2026-06-26
DAL836 - 6 2026-07-22
DAL2420 Delta Air Lines 6 2026-07-23
DAL2263 - 6 2026-07-17
DAL929 Delta Air Lines 5 2026-07-23
DAL807 Delta Air Lines 5 2026-07-23
DAL796 - 5 2026-07-10
DAL744 - 5 2026-07-16
DAL2262 Delta Air Lines 5 2026-07-20
DAL1823 Delta Air Lines 5 2026-06-26
DAL945 - 4 2026-06-15
DAL901 Delta Air Lines 4 2026-06-14
DAL879 - 4 2026-06-30
DAL777 - 4 2026-07-14
DAL722 - 4 2026-07-04
DAL689 - 4 2026-06-28
DAL625 - 4 2026-07-05
DAL497 Delta Air Lines 4 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL334 BOS → ATL Jul 26, 19:10 UTCJul 26, 21:15 UTC2h 5m
2026-07-26 DAL334 BOS → ATL Jul 26, 13:20 UTCJul 26, 17:00 UTC3h 40m
2026-07-25 DAL334 BOS → ATL Jul 25, 19:00 UTCJul 25, 22:30 UTC3h 30m
2026-07-25 DAL334 BOS → ATL Jul 25, 13:20 UTCJul 25, 17:05 UTC3h 45m
2026-07-25 DAL502 ATL → SAN Jul 25, 07:40 UTCJul 25, 11:05 UTC3h 25m
2026-07-25 DAL502 ATL → SAN Jul 25, 07:39 UTCJul 25, 11:05 UTC3h 26m
2026-07-25 DAL544 ATL → LGA Jul 25, 02:10 UTCJul 25, 05:50 UTC3h 40m
2026-07-23 DAL778 DFW → LGA Jul 23, 23:20 UTCJul 24, 02:45 UTC3h 25m
2026-07-23 DAL807 JFK → AUS Jul 23, 16:35 UTCJul 23, 21:35 UTC5h 0m
2026-07-23 DAL807 JFK → AUS Jul 23, 16:30 UTCJul 23, 21:15 UTC4h 45m
2026-07-23 DAL2420 JFK → BOS Jul 23, 12:05 UTCJul 23, 14:10 UTC2h 5m
2026-07-23 DAL929 ATL → LGA Jul 23, 07:05 UTCJul 23, 10:15 UTC3h 10m
2026-07-22 DAL836 - Jul 22, 22:20 UTCJul 23, 01:40 UTC3h 20m
2026-07-22 DAL1525 SNA → SEA Jul 22, 19:30 UTCJul 22, 20:35 UTC1h 5m
2026-07-22 DAL1525 SNA → SEA Jul 22, 17:05 UTCJul 22, 18:05 UTC1h 0m
2026-07-22 DAL2204 YYZ → ATL Jul 22, 14:25 UTCJul 22, 15:20 UTC55m
2026-07-22 DAL2204 YYZ → ATL Jul 22, 11:40 UTCJul 22, 12:40 UTC1h 0m
2026-07-21 DAL807 JFK → AUS Jul 21, 22:45 UTCJul 22, 02:20 UTC3h 35m
2026-07-21 DAL807 JFK → AUS Jul 21, 17:25 UTCJul 21, 20:15 UTC2h 50m
2026-07-21 DAL2420 ATL → JFK Jul 21, 12:05 UTCJul 21, 13:50 UTC1h 45m
2026-07-21 DAL2420 ATL → JFK Jul 21, 12:00 UTCJul 21, 13:53 UTC1h 53m
2026-07-21 DAL391 DFW → BOS Jul 21, 06:05 UTCJul 21, 10:05 UTC4h 0m
2026-07-21 DAL391 DFW → BOS Jul 21, 00:20 UTCJul 21, 04:10 UTC3h 50m
2026-07-20 DAL748 LAS → ATL Jul 20, 19:05 UTCJul 20, 22:55 UTC3h 50m
2026-07-20 DAL2262 ORD → LGA Jul 20, 14:25 UTCJul 20, 17:05 UTC2h 40m
2026-07-20 DAL2262 ORD → LGA Jul 20, 14:25 UTCJul 20, 17:12 UTC2h 47m
2026-07-20 DAL1746 - Jul 20, 11:20 UTCJul 20, 13:00 UTC1h 40m
2026-07-20 DAL1746 DTW → MSP Jul 20, 11:15 UTCJul 20, 12:54 UTC1h 39m
2026-07-19 DAL785 MSP → LAX Jul 19, 22:40 UTCJul 20, 02:00 UTC3h 20m
2026-07-19 DAL366 ATL → LGA Jul 19, 17:50 UTCJul 19, 21:05 UTC3h 15m
2026-07-19 DAL918 PHX → ATL Jul 19, 13:00 UTCJul 19, 16:25 UTC3h 25m
2026-07-18 DAL366 ATL → PHX Jul 18, 17:55 UTCJul 18, 21:20 UTC3h 25m
2026-07-18 DAL2204 MCO → ATL Jul 18, 15:05 UTCJul 18, 16:10 UTC1h 5m
2026-07-18 DAL2204 ATL → MCO Jul 18, 12:20 UTCJul 18, 13:20 UTC1h 0m
2026-07-18 DAL1168 - Jul 18, 09:35 UTCJul 18, 10:50 UTC1h 15m
2026-07-18 DAL1107 ATL → FLL Jul 18, 05:40 UTCJul 18, 07:05 UTC1h 25m
2026-07-18 DAL1107 ATL → FLL Jul 18, 05:40 UTCJul 18, 07:05 UTC1h 25m
2026-07-18 DAL1032 MCO → MSP Jul 18, 01:20 UTCJul 18, 03:20 UTC2h 1m
2026-07-17 DAL2415 SLC → SFO Jul 17, 20:44 UTCJul 17, 23:35 UTC2h 50m
2026-07-17 DAL2415 SLC → SFO Jul 17, 16:15 UTCJul 17, 19:20 UTC3h 5m
2026-07-17 DAL2263 TPA → MSP Jul 17, 12:10 UTCJul 17, 14:55 UTC2h 45m
2026-07-17 DAL1591 ATL → TPA Jul 17, 02:34 UTCJul 17, 03:39 UTC1h 5m
2026-07-16 DAL406 BZN → ATL Jul 16, 20:46 UTCJul 17, 00:14 UTC3h 28m
2026-07-16 DAL406 ATL → ATL Jul 16, 16:05 UTCJul 17, 00:30 UTC8h 25m
2026-07-16 DAL744 - Jul 16, 13:34 UTCJul 16, 14:35 UTC1h 0m
2026-07-16 DAL1720 ATL → TPA Jul 16, 00:30 UTCJul 16, 01:30 UTC1h 0m
2026-07-15 DAL587 - Jul 15, 19:45 UTCJul 15, 22:30 UTC2h 45m
2026-07-15 DAL588 ATL → MEX Jul 15, 14:55 UTCJul 15, 17:40 UTC2h 45m
2026-07-15 DAL857 LAS → ATL Jul 15, 07:40 UTCJul 15, 11:20 UTC3h 40m
2026-07-15 DAL955 ATL → LAS Jul 15, 00:15 UTCJul 15, 03:50 UTC3h 35m

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 N686DA page for operator, model, and routing details .

Mode-S A919CD frequently asked

What is Mode-S code A919CD?
A919CD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N686DA.
Where is Mode-S A919CD registered?
Mode-S code A919CD 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 A919CD broadcasting right now?
No active broadcast right now. Last signal was 18d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A919CD, octal 52214715, decimal 11,082,189.
What flights does A919CD operate?
Mode-S A919CD has broadcast 20 distinct callsigns, including DAL2204, DAL1591, DAL1930, DAL836, DAL2420.