Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A91616

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N685DA · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
A91616
Octal
52213026
Decimal
11,081,238
Country
US
Tail
N685DA
Type
B752
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
491
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S A91616.

Country allocation

The ICAO 24-bit address A91616 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
DAL1889 Delta Air Lines 16 2026-07-23
DAL1768 Delta Air Lines 14 2026-07-23
DAL982 - 12 2026-06-28
DAL1902 Delta Air Lines 10 2026-04-16
DAL777 Delta Air Lines 9 2026-07-26
DAL1930 Delta Air Lines 9 2026-07-24
DAL1823 Delta Air Lines 9 2026-07-24
DAL1611 - 8 2026-07-15
DAL391 - 7 2026-07-14
DAL1525 - 7 2026-07-10
DAL1153 Delta Air Lines 7 2026-04-29
DAL980 Delta Air Lines 6 2026-06-09
DAL8960 Delta Air Lines 6 2026-04-27
DAL334 Delta Air Lines 6 2026-06-27
DAL2881 Delta Air Lines 6 2026-05-23
DAL2588 Delta Air Lines 6 2026-05-20
DAL2569 - 6 2026-07-07
DAL983 - 5 2026-06-28
DAL981 Delta Air Lines 5 2026-06-08
DAL913 - 5 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL777 BOS → ORD Jul 26, 17:55 UTCJul 26, 21:25 UTC3h 30m
2026-07-26 DAL777 BOS → ORD Jul 26, 12:40 UTCJul 26, 16:10 UTC3h 30m
2026-07-25 DAL724 ATL → BTV Jul 25, 23:40 UTCJul 26, 03:50 UTC4h 10m
2026-07-25 DAL750 ATL → DAY Jul 25, 17:50 UTCJul 25, 22:05 UTC4h 15m
2026-07-25 DAL750 ATL → DAY Jul 25, 17:45 UTCJul 25, 22:02 UTC4h 17m
2026-07-25 DAL879 LGA → ATL Jul 25, 05:45 UTCJul 25, 09:15 UTC3h 30m
2026-07-25 DAL879 LGA → ATL Jul 25, 05:41 UTCJul 25, 09:08 UTC3h 27m
2026-07-25 DAL722 BOS → DTW Jul 25, 00:10 UTCJul 25, 03:45 UTC3h 35m
2026-07-24 DAL1823 ATL → CVG Jul 24, 18:45 UTCJul 24, 22:05 UTC3h 20m
2026-07-24 DAL1823 ATL → CVG Jul 24, 18:40 UTCJul 24, 22:04 UTC3h 24m
2026-07-24 DAL1930 JFK → STT Jul 24, 12:25 UTCJul 24, 15:40 UTC3h 15m
2026-07-23 DAL1768 BOS → LIR Jul 23, 20:45 UTCJul 24, 00:10 UTC3h 25m
2026-07-23 DAL1768 BOS → LIR Jul 23, 20:40 UTCJul 24, 00:02 UTC3h 22m
2026-07-23 DAL1889 ATL → STT Jul 23, 15:45 UTCJul 23, 18:55 UTC3h 10m
2026-07-23 DAL1486 JFK → MSY Jul 23, 11:45 UTCJul 23, 12:50 UTC1h 5m
2026-07-23 DAL2385 MKE → ATL Jul 23, 02:20 UTCJul 23, 04:50 UTC2h 30m
2026-07-22 DAL2274 DTW → SFO Jul 22, 21:55 UTCJul 23, 00:40 UTC2h 45m
2026-07-22 DAL2274 DTW → SFO Jul 22, 21:36 UTCJul 23, 00:35 UTC2h 59m
2026-07-22 DAL2274 DTW → SFO Jul 22, 17:30 UTCJul 22, 20:10 UTC2h 40m
2026-07-22 DAL1308 SFO → MSP Jul 22, 13:07 UTCJul 22, 16:00 UTC2h 53m
2026-07-22 DAL1308 SFO → MSP Jul 22, 13:25 UTCJul 22, 16:05 UTC2h 40m
2026-07-21 DAL430 - Jul 21, 19:55 UTCJul 22, 00:25 UTC4h 30m
2026-07-21 DAL607 JFK → LAS Jul 21, 11:30 UTCJul 21, 16:10 UTC4h 40m
2026-07-20 DAL795 LAS → JFK Jul 20, 19:50 UTCJul 21, 00:20 UTC4h 30m
2026-07-20 DAL945 ATL → LAS Jul 20, 14:35 UTCJul 20, 17:55 UTC3h 20m
2026-07-20 DAL2722 SFO → ATL Jul 20, 09:45 UTCJul 20, 10:25 UTC40m
2026-07-20 DAL2276 SLC → SFO Jul 20, 05:20 UTCJul 20, 06:05 UTC45m
2026-07-20 DAL2276 SLC → SFO Jul 20, 05:20 UTCJul 20, 06:03 UTC43m
2026-07-20 DAL3132 MSY → ATL Jul 20, 02:15 UTCJul 20, 03:25 UTC1h 10m
2026-07-20 DAL3132 MSY → ATL Jul 20, 02:12 UTCJul 20, 03:17 UTC1h 5m
2026-07-20 DAL3132 MSY → ATL Jul 20, 00:05 UTCJul 20, 01:10 UTC1h 5m
2026-07-19 DAL317 BNA → ATL Jul 19, 20:30 UTCJul 19, 21:15 UTC45m
2026-07-18 DAL317 - Jul 18, 23:35 UTCJul 19, 18:35 UTC19h 0m
2026-07-18 DAL315 ATL → BNA Jul 18, 22:35 UTCJul 19, 18:35 UTC20h 0m
2026-07-18 DAL927 LAS → ATL Jul 18, 15:40 UTCJul 18, 19:20 UTC3h 40m
2026-07-18 DAL916 DTW → LAS Jul 18, 03:50 UTCJul 18, 07:20 UTC3h 30m
2026-07-17 DAL778 LAS → DTW Jul 17, 22:26 UTCJul 18, 01:57 UTC3h 31m
2026-07-17 DAL778 LAS → DTW Jul 17, 22:29 UTCJul 18, 02:00 UTC3h 30m
2026-07-17 DAL807 JFK → LAS Jul 17, 15:55 UTCJul 17, 20:35 UTC4h 40m
2026-07-17 DAL2420 ATL → JFK Jul 17, 11:55 UTCJul 17, 13:50 UTC1h 55m
2026-07-17 DAL8771 JFK → ATL Jul 17, 03:05 UTCJul 17, 04:39 UTC1h 35m
2026-07-17 DAL8771 JFK → ATL Jul 17, 03:00 UTCJul 17, 04:39 UTC1h 39m
2026-07-16 DAL1768 BOS → LIR Jul 16, 23:59 UTCJul 17, 00:55 UTC55m
2026-07-16 DAL1889 - Jul 16, 16:15 UTCJul 16, 17:35 UTC1h 20m
2026-07-16 DAL1889 ATL → STT Jul 16, 16:15 UTCJul 16, 19:32 UTC3h 17m
2026-07-16 DAL1486 TPA → ATL Jul 16, 11:45 UTCJul 16, 12:49 UTC1h 5m
2026-07-16 DAL1591 ATL → TPA Jul 16, 01:10 UTCJul 16, 02:15 UTC1h 5m
2026-07-15 DAL1873 - Jul 15, 19:45 UTCJul 15, 23:10 UTC3h 25m
2026-07-15 DAL1894 ATL → SXM Jul 15, 14:21 UTCJul 15, 17:57 UTC3h 36m
2026-07-15 DAL1894 - Jul 15, 14:25 UTCJul 15, 17:35 UTC3h 10m

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 N685DA page for operator, model, and routing details .

Mode-S A91616 frequently asked

What is Mode-S code A91616?
A91616 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N685DA.
Where is Mode-S A91616 registered?
Mode-S code A91616 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 A91616 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A91616, octal 52213026, decimal 11,081,238.
What flights does A91616 operate?
Mode-S A91616 has broadcast 20 distinct callsigns, including DAL1889, DAL1768, DAL982, DAL1902, DAL777.