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 37m ago
Flights observed
213
Distinct callsigns
20
Country
US
Last broadcast
37m 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
DAL1930 Delta Air Lines 7 2026-06-26
DAL1591 - 7 2026-06-19
DAL836 Delta Air Lines 5 2026-05-27
DAL2204 - 5 2026-06-25
DAL1823 Delta Air Lines 5 2026-06-26
DAL945 - 4 2026-06-15
DAL901 Delta Air Lines 4 2026-06-14
DAL744 - 4 2026-06-19
DAL2966 Delta Air Lines 4 2026-05-23
DAL1830 - 4 2026-06-18
DAL1372 Delta Air Lines 4 2026-06-02
DAL982 Delta Air Lines 3 2026-06-16
DAL796 Delta Air Lines 3 2026-05-26
DAL722 - 3 2026-06-26
DAL2881 Delta Air Lines 3 2026-05-30
DAL2263 - 3 2026-06-23
DAL2262 Delta Air Lines 3 2026-06-05
DAL1912 Delta Air Lines 3 2026-06-01
DAL1831 - 3 2026-06-18
DAL1703 Delta Air Lines 3 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-26 DAL722 ATL → LAS Jun 26, 22:55 UTCJun 27, 02:45 UTC3h 50m
2026-06-26 DAL1823 ATL → CVG Jun 26, 17:25 UTCJun 26, 20:40 UTC3h 15m
2026-06-26 DAL1930 JFK → STT Jun 26, 12:19 UTCJun 26, 15:49 UTC3h 30m
2026-06-25 DAL689 LAS → JFK Jun 25, 22:50 UTCJun 26, 02:51 UTC4h 1m
2026-06-25 DAL689 LAS → JFK Jun 25, 22:54 UTCJun 26, 03:00 UTC4h 5m
2026-06-25 DAL549 ATL → LGA Jun 25, 17:25 UTCJun 25, 21:15 UTC3h 50m
2026-06-25 DAL2204 MCO → ATL Jun 25, 14:20 UTCJun 25, 15:20 UTC1h 0m
2026-06-25 DAL2204 ATL → MCO Jun 25, 11:35 UTCJun 25, 12:30 UTC55m
2026-06-24 DAL748 MSP → LAX Jun 24, 21:09 UTCJun 25, 00:29 UTC3h 20m
2026-06-24 DAL2238 JFK → MIA Jun 24, 16:34 UTCJun 24, 19:39 UTC3h 5m
2026-06-24 DAL1308 BOS → MSP Jun 24, 12:40 UTCJun 24, 15:24 UTC2h 45m
2026-06-24 DAL2614 MSP → BOS Jun 24, 01:49 UTCJun 24, 04:00 UTC2h 10m
2026-06-23 DAL2274 PHX → MSP Jun 23, 20:54 UTCJun 23, 23:55 UTC3h 0m
2026-06-23 DAL2274 MSP → PHX Jun 23, 16:29 UTCJun 23, 19:24 UTC2h 55m
2026-06-23 DAL2263 - Jun 23, 11:45 UTCJun 23, 14:44 UTC3h 0m
2026-06-23 DAL2263 TPA → MSP Jun 23, 11:43 UTCJun 23, 14:49 UTC3h 6m
2026-06-22 DAL2385 MSP → TPA Jun 22, 23:29 UTCJun 23, 02:15 UTC2h 45m
2026-06-22 DAL2272 LAS → MSP Jun 22, 18:54 UTCJun 22, 21:30 UTC2h 35m
2026-06-22 DAL497 JFK → LAX Jun 22, 12:00 UTCJun 22, 17:25 UTC5h 25m
2026-06-22 DAL497 JFK → LAX Jun 22, 11:59 UTCJun 22, 17:22 UTC5h 23m
2026-06-21 DAL430 LAS → BOS Jun 21, 18:10 UTCJun 21, 22:24 UTC4h 15m
2026-06-21 DAL607 BOS → LAX Jun 21, 11:20 UTCJun 21, 16:25 UTC5h 5m
2026-06-21 DAL607 BOS → LAX Jun 21, 11:19 UTCJun 21, 16:16 UTC4h 57m
2026-06-20 DAL1886 SXM → JFK Jun 20, 20:20 UTCJun 20, 23:39 UTC3h 20m
2026-06-20 DAL1887 JFK → SXM Jun 20, 14:35 UTCJun 20, 18:12 UTC3h 37m
2026-06-20 DAL1887 JFK → SXM Jun 20, 14:35 UTCJun 20, 17:44 UTC3h 10m
2026-06-20 DAL498 - Jun 20, 12:45 UTCJun 20, 13:09 UTC25m
2026-06-20 DAL498 LAS → JFK Jun 20, 08:34 UTCJun 20, 12:39 UTC4h 5m
2026-06-20 DAL955 ATL → LAS Jun 20, 03:09 UTCJun 20, 07:00 UTC3h 50m
2026-06-19 DAL1525 TPA → ATL Jun 19, 21:34 UTCJun 19, 22:39 UTC1h 5m
2026-06-19 DAL1525 ATL → TPA Jun 19, 18:25 UTCJun 19, 19:49 UTC1h 25m
2026-06-19 DAL744 TPA → ATL Jun 19, 12:54 UTCJun 19, 14:04 UTC1h 10m
2026-06-19 DAL1591 ATL → TPA Jun 19, 01:45 UTCJun 19, 02:45 UTC1h 0m
2026-06-19 DAL1591 ATL → TPA Jun 19, 01:44 UTCJun 19, 02:41 UTC57m
2026-06-18 DAL1831 - Jun 18, 21:55 UTCJun 18, 23:25 UTC1h 30m
2026-06-18 DAL1831 - Jun 18, 20:10 UTCJun 18, 20:25 UTC15m
2026-06-18 DAL1830 - Jun 18, 15:30 UTCJun 18, 16:50 UTC1h 20m
2026-06-18 DAL1830 ATL → GUA Jun 18, 15:30 UTCJun 18, 18:28 UTC2h 58m
2026-06-18 DAL1486 JFK → MSY Jun 18, 11:45 UTCJun 18, 12:50 UTC1h 5m
2026-06-18 DAL1591 ATL → TPA Jun 18, 01:20 UTCJun 18, 02:20 UTC1h 0m
2026-06-17 DAL1467 - Jun 17, 22:00 UTCJun 17, 23:20 UTC1h 20m
2026-06-17 DAL1031 ATL → CHS Jun 17, 18:20 UTCJun 17, 19:40 UTC1h 20m
2026-06-17 DAL3128 MSY → ATL Jun 17, 14:35 UTCJun 17, 15:40 UTC1h 5m
2026-06-17 DAL3128 ATL → MSY Jun 17, 12:00 UTCJun 17, 13:05 UTC1h 5m
2026-06-16 DAL983 - Jun 16, 22:50 UTCJun 17, 00:35 UTC1h 45m
2026-06-16 DAL982 ATL → BOG Jun 16, 14:15 UTCJun 16, 15:50 UTC1h 35m
2026-06-16 DAL982 ATL → BOG Jun 16, 14:15 UTCJun 16, 18:33 UTC4h 18m
2026-06-16 DAL2286 JFK → ATL Jun 16, 10:20 UTCJun 16, 12:10 UTC1h 50m
2026-06-15 DAL795 BOS → ORD Jun 15, 19:39 UTCJun 15, 23:50 UTC4h 10m
2026-06-15 DAL945 ATL → LAS Jun 15, 14:10 UTCJun 15, 18:10 UTC4h 0m

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 37m 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 DAL1930, DAL1591, DAL836, DAL2204, DAL1823.