Apparatus

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sensors Mode-S transponder

A1863B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N198DN · BOEING 767-300 · operated by DELTA AIR LINES INC

Hex
A1863B
Octal
50303073
Decimal
10,585,659
Country
US
Tail
N198DN
Type
B763
Broadcasting now · callsign DAL208 · 33,000 ft
Flights observed
332
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:35 UTC

Current position

A1863B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A1863B 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
DAL219 Delta Air Lines 14 2026-07-26
DAL636 Delta Air Lines 13 2026-07-26
DAL316 - 12 2026-07-16
DAL218 Delta Air Lines 12 2026-07-25
DAL623 - 11 2026-06-18
DAL534 - 11 2026-07-15
DAL397 Delta Air Lines 10 2026-06-19
DAL181 - 10 2026-07-18
DAL650 Delta Air Lines 9 2026-07-25
DAL307 Delta Air Lines 9 2026-07-24
DAL180 - 9 2026-07-18
DAL92 - 8 2026-07-10
DAL480 Delta Air Lines 8 2026-07-22
DAL204 - 8 2026-07-07
DAL122 Delta Air Lines 8 2026-06-29
DAL93 - 7 2026-07-10
DAL767 - 7 2026-06-21
DAL405 - 7 2026-07-07
DAL310 Delta Air Lines 7 2026-07-24
DAL155 - 7 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL636 SEA → ANC Jul 26, 17:20 UTCJul 26, 22:35 UTC5h 15m
2026-07-26 DAL219 CDG → MSP Jul 26, 07:05 UTCJul 26, 08:25 UTC1h 20m
2026-07-26 DAL219 CDG → MSP Jul 26, 07:02 UTCJul 26, 15:10 UTC8h 8m
2026-07-25 DAL218 JFK → CPH Jul 25, 21:10 UTCJul 26, 04:15 UTC7h 5m
2026-07-25 DAL650 JFK → ATL Jul 25, 02:10 UTCJul 25, 11:10 UTC9h 0m
2026-07-24 DAL307 HNL → MSP Jul 24, 14:45 UTCJul 25, 00:00 UTC9h 15m
2026-07-24 DAL307 HNL → MSP Jul 24, 14:41 UTCJul 24, 23:58 UTC9h 17m
2026-07-24 DAL310 LGA → ATL Jul 24, 01:30 UTCJul 24, 09:20 UTC7h 50m
2026-07-23 DAL307 HNL → MSP Jul 23, 23:30 UTCJul 23, 23:45 UTC15m
2026-07-23 DAL307 HNL → MSP Jul 23, 14:40 UTCJul 23, 19:15 UTC4h 35m
2026-07-23 DAL310 LGA → ATL Jul 23, 01:00 UTCJul 23, 09:05 UTC8h 5m
2026-07-22 DAL480 LAX → HNL Jul 22, 15:40 UTCJul 22, 21:10 UTC5h 30m
2026-07-22 DAL463 LGA → DEN Jul 22, 04:10 UTCJul 22, 05:10 UTC1h 0m
2026-07-21 DAL425 - Jul 21, 17:25 UTCJul 21, 18:30 UTC1h 5m
2026-07-20 DAL773 DTW → PHX Jul 20, 15:20 UTCJul 20, 20:20 UTC5h 0m
2026-07-20 DAL676 - Jul 20, 06:10 UTCJul 20, 10:55 UTC4h 45m
2026-07-19 DAL463 LGA → DEN Jul 19, 15:40 UTCJul 20, 03:55 UTC12h 15m
2026-07-18 DAL427 - Jul 18, 22:50 UTCJul 19, 03:35 UTC4h 45m
2026-07-18 DAL180 HND → HNL Jul 18, 13:10 UTCJul 18, 20:23 UTC7h 13m
2026-07-18 DAL181 - Jul 18, 02:55 UTCJul 18, 03:20 UTC25m
2026-07-18 DAL181 HNL → HND Jul 18, 02:54 UTCJul 18, 11:02 UTC8h 8m
2026-07-17 DAL307 - Jul 17, 14:39 UTCJul 17, 23:39 UTC9h 0m
2026-07-17 DAL310 - Jul 17, 04:35 UTCJul 17, 09:25 UTC4h 50m
2026-07-17 DAL310 - Jul 17, 01:00 UTCJul 17, 01:09 UTC10m
2026-07-16 DAL180 HND → HNL Jul 16, 13:02 UTCJul 16, 20:12 UTC7h 10m
2026-07-16 DAL180 - Jul 16, 13:05 UTCJul 16, 20:09 UTC7h 5m
2026-07-16 DAL181 - Jul 16, 02:50 UTCJul 16, 03:15 UTC25m
2026-07-16 DAL181 HNL → HND Jul 16, 02:49 UTCJul 16, 11:01 UTC8h 12m
2026-07-16 DAL316 - Jul 16, 00:00 UTCJul 16, 00:20 UTC20m
2026-07-15 DAL316 - Jul 15, 18:15 UTCJul 15, 20:10 UTC1h 55m
2026-07-15 DAL534 - Jul 15, 05:55 UTCJul 15, 11:25 UTC5h 30m
2026-07-15 DAL636 - Jul 15, 00:00 UTCJul 15, 00:20 UTC20m
2026-07-14 DAL636 - Jul 14, 14:45 UTCJul 14, 20:05 UTC5h 20m
2026-07-14 DAL676 LAX → JFK Jul 14, 06:05 UTCJul 14, 11:15 UTC5h 10m
2026-07-14 DAL463 - Jul 14, 03:25 UTCJul 14, 04:05 UTC40m
2026-07-13 DAL425 - Jul 13, 15:55 UTCJul 13, 16:20 UTC25m
2026-07-12 DAL738 - Jul 12, 19:25 UTCJul 13, 00:25 UTC5h 0m
2026-07-12 DAL219 - Jul 12, 15:05 UTCJul 12, 16:15 UTC1h 10m
2026-07-12 DAL219 - Jul 12, 08:35 UTCJul 12, 15:01 UTC6h 25m
2026-07-12 DAL219 CPH → JFK Jul 12, 08:34 UTCJul 12, 16:16 UTC7h 42m
2026-07-11 DAL218 JFK → CPH Jul 11, 23:13 UTCJul 12, 06:19 UTC7h 6m
2026-07-11 DAL218 JFK → CPH Jul 11, 23:15 UTCJul 12, 06:15 UTC7h 0m
2026-07-11 DAL219 - Jul 11, 07:20 UTCJul 11, 09:30 UTC2h 10m
2026-07-11 DAL219 CPH → JFK Jul 11, 07:17 UTCJul 11, 15:31 UTC8h 14m
2026-07-10 DAL218 JFK → CPH Jul 10, 21:38 UTCJul 11, 04:51 UTC7h 13m
2026-07-10 DAL218 JFK → CPH Jul 10, 21:40 UTCJul 11, 04:35 UTC6h 55m
2026-07-10 DAL93 BER → JFK Jul 10, 09:40 UTCJul 10, 18:15 UTC8h 35m
2026-07-10 DAL93 BER → JFK Jul 10, 09:36 UTCJul 10, 18:06 UTC8h 30m
2026-07-10 DAL92 JFK → BER Jul 10, 00:10 UTCJul 10, 07:30 UTC7h 20m
2026-07-09 DAL219 CPH → JFK Jul 9, 07:15 UTCJul 9, 15:15 UTC8h 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 N198DN page for operator, model, and routing details .

Mode-S A1863B frequently asked

What is Mode-S code A1863B?
A1863B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N198DN.
Where is Mode-S A1863B registered?
Mode-S code A1863B 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 A1863B broadcasting right now?
Yes. Mode-S A1863B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1863B, octal 50303073, decimal 10,585,659.
What flights does A1863B operate?
Mode-S A1863B has broadcast 20 distinct callsigns, including DAL219, DAL636, DAL316, DAL218, DAL623.