Apparatus

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sensors Mode-S transponder

A16C3A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N191DN · BOEING 767-300 · operated by DELTA AIR LINES INC

Hex
A16C3A
Octal
50266072
Decimal
10,579,002
Country
US
Tail
N191DN
Type
B763
Broadcasting now · callsign DAL310 · 37,000 ft
Flights observed
304
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:45 UTC

Current position

A16C3A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A16C3A 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
DAL1882 Delta Air Lines 17 2026-05-03
DAL650 Delta Air Lines 15 2026-07-22
DAL316 - 11 2026-07-20
DAL416 - 10 2026-06-28
DAL623 Delta Air Lines 9 2026-07-26
DAL632 - 8 2026-07-02
DAL209 Delta Air Lines 8 2026-06-01
DAL181 Delta Air Lines 8 2026-07-21
DAL92 - 7 2026-07-14
DAL830 Delta Air Lines 7 2026-04-27
DAL427 Delta Air Lines 7 2026-06-09
DAL180 - 7 2026-07-21
DAL140 - 7 2026-06-30
DAL915 Delta Air Lines 6 2026-07-23
DAL636 Delta Air Lines 6 2026-07-25
DAL534 Delta Air Lines 6 2026-07-26
DAL425 - 6 2026-07-16
DAL397 - 6 2026-07-20
DAL34 Delta Air Lines 6 2026-06-01
DAL219 Delta Air Lines 6 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL623 ATL → SFO Jul 26, 18:00 UTCJul 26, 19:45 UTC1h 45m
2026-07-26 DAL534 ATL → DCA Jul 26, 06:00 UTCJul 26, 11:05 UTC5h 6m
2026-07-26 DAL534 ATL → DCA Jul 26, 05:57 UTCJul 26, 11:03 UTC5h 6m
2026-07-25 DAL636 SEA → ANC Jul 25, 14:55 UTCJul 26, 01:05 UTC10h 10m
2026-07-24 DAL668 JFK → LAS Jul 24, 18:55 UTCJul 24, 23:40 UTC4h 45m
2026-07-24 DAL668 JFK → LAS Jul 24, 11:15 UTCJul 24, 17:00 UTC5h 45m
2026-07-23 DAL938 LAX → JFK Jul 23, 23:20 UTCJul 24, 04:05 UTC4h 45m
2026-07-23 DAL767 LAX → AUS Jul 23, 15:50 UTCJul 23, 21:20 UTC5h 30m
2026-07-23 DAL915 BOS → MCO Jul 23, 08:05 UTCJul 23, 12:45 UTC4h 40m
2026-07-22 DAL767 LAX → AUS Jul 22, 16:45 UTCJul 22, 22:00 UTC5h 15m
2026-07-22 DAL650 JFK → ATL Jul 22, 11:20 UTCJul 22, 11:35 UTC15m
2026-07-22 DAL650 JFK → ATL Jul 22, 02:15 UTCJul 22, 11:35 UTC9h 20m
2026-07-22 DAL650 JFK → ATL Jul 22, 02:10 UTCJul 22, 11:05 UTC8h 55m
2026-07-21 DAL180 - Jul 21, 14:35 UTCJul 21, 21:40 UTC7h 5m
2026-07-21 DAL181 HNL → HND Jul 21, 04:45 UTCJul 21, 05:10 UTC25m
2026-07-21 DAL181 HNL → HND Jul 21, 04:43 UTCJul 21, 12:37 UTC7h 54m
2026-07-20 DAL316 SLC → HNL Jul 20, 17:53 UTCJul 21, 00:02 UTC6h 9m
2026-07-20 DAL316 - Jul 20, 17:55 UTCJul 21, 00:10 UTC6h 14m
2026-07-20 DAL397 - Jul 20, 10:05 UTCJul 20, 12:00 UTC1h 55m
2026-07-20 DAL397 OGG → SLC Jul 20, 06:29 UTCJul 20, 11:56 UTC5h 27m
2026-07-19 DAL623 - Jul 19, 23:50 UTCJul 20, 00:00 UTC10m
2026-07-19 DAL623 - Jul 19, 17:50 UTCJul 19, 19:35 UTC1h 45m
2026-07-19 DAL534 ATL → DCA Jul 19, 06:05 UTCJul 19, 11:30 UTC5h 25m
2026-07-18 DAL316 - Jul 18, 18:00 UTCJul 19, 00:10 UTC6h 10m
2026-07-18 DAL397 - Jul 18, 10:45 UTCJul 18, 12:35 UTC1h 50m
2026-07-17 DAL623 - Jul 17, 23:35 UTCJul 18, 01:20 UTC1h 45m
2026-07-17 DAL623 SLC → OGG Jul 17, 23:30 UTCJul 18, 05:38 UTC6h 8m
2026-07-17 DAL9965 LAX → SLC Jul 17, 20:15 UTCJul 17, 21:30 UTC1h 15m
2026-07-17 DAL773 DTW → PHX Jul 17, 13:20 UTCJul 17, 18:25 UTC5h 5m
2026-07-17 DAL676 LAX → JFK Jul 17, 06:10 UTCJul 17, 10:55 UTC4h 45m
2026-07-17 DAL463 - Jul 17, 02:54 UTCJul 17, 04:20 UTC1h 25m
2026-07-16 DAL425 - Jul 16, 15:55 UTCJul 16, 16:25 UTC30m
2026-07-16 DAL425 LAX → OGG Jul 16, 15:51 UTCJul 16, 21:01 UTC5h 10m
2026-07-15 DAL738 JFK → LAX Jul 15, 19:25 UTCJul 16, 00:25 UTC5h 0m
2026-07-15 DAL93 - Jul 15, 08:05 UTCJul 15, 08:30 UTC25m
2026-07-15 DAL93 BER → JFK Jul 15, 08:00 UTCJul 15, 16:11 UTC8h 11m
2026-07-15 DAL93 BER → JFK Jul 15, 08:00 UTCJul 15, 16:10 UTC8h 10m
2026-07-14 DAL92 - Jul 14, 22:05 UTCJul 15, 05:40 UTC7h 34m
2026-07-14 DAL92 JFK → BER Jul 14, 22:04 UTCJul 15, 05:40 UTC7h 36m
2026-07-14 DAL115 OPO → JFK Jul 14, 12:10 UTCJul 14, 18:50 UTC6h 40m
2026-07-14 DAL114 JFK → OPO Jul 14, 02:55 UTCJul 14, 09:10 UTC6h 15m
2026-07-13 DAL668 SFO → JFK Jul 13, 19:00 UTCJul 14, 00:10 UTC5h 10m
2026-07-13 DAL668 JFK → SFO Jul 13, 11:25 UTCJul 13, 16:35 UTC5h 10m
2026-07-12 DAL938 LAX → JFK Jul 12, 22:20 UTCJul 13, 03:20 UTC5h 0m
2026-07-12 DAL767 JFK → LAX Jul 12, 15:35 UTCJul 12, 20:45 UTC5h 10m
2026-07-12 DAL365 - Jul 12, 06:05 UTCJul 12, 11:05 UTC5h 0m
2026-07-11 DAL363 JFK → SFO Jul 11, 21:45 UTCJul 12, 03:20 UTC5h 35m
2026-07-11 DAL915 LAX → JFK Jul 11, 08:01 UTCJul 11, 12:40 UTC4h 40m
2026-07-11 DAL707 JFK → LAX Jul 11, 00:10 UTCJul 11, 05:31 UTC5h 20m
2026-07-10 DAL9967 ATL → JFK Jul 10, 03:30 UTCJul 10, 05:15 UTC1h 45m

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 N191DN page for operator, model, and routing details .

Mode-S A16C3A frequently asked

What is Mode-S code A16C3A?
A16C3A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N191DN.
Where is Mode-S A16C3A registered?
Mode-S code A16C3A 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 A16C3A broadcasting right now?
Yes. Mode-S A16C3A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A16C3A, octal 50266072, decimal 10,579,002.
What flights does A16C3A operate?
Mode-S A16C3A has broadcast 20 distinct callsigns, including DAL1882, DAL650, DAL316, DAL416, DAL623.