Apparatus

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sensors Mode-S transponder

A690BF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N522DZ · AIRBUS A-350-900 · operated by DELTA AIR LINES INC

Hex
A690BF
Octal
51510277
Decimal
10,916,031
Country
US
Tail
N522DZ
Type
A359
Broadcasting now · callsign DAL172 · 35,000 ft
Flights observed
181
Distinct callsigns
20
Country
US
Last broadcast
5h ago

Current position

A690BF is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A690BF 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
DAL201 - 13 2026-07-08
DAL88 Delta Air Lines 12 2026-07-07
DAL41 Delta Air Lines 12 2026-05-31
DAL327 - 10 2026-07-07
DAL200 - 10 2026-07-08
DAL89 Delta Air Lines 9 2026-07-06
DAL40 Delta Air Lines 9 2026-05-31
DAL189 Delta Air Lines 8 2026-06-07
DAL188 Delta Air Lines 8 2026-06-08
DAL763 - 7 2026-07-06
DAL500 Delta Air Lines 6 2026-05-03
DAL26 - 6 2026-06-17
DAL211 Delta Air Lines 6 2026-06-02
DAL210 Delta Air Lines 6 2026-06-02
DAL159 - 6 2026-07-11
DAL39 Delta Air Lines 5 2026-06-10
DAL38 Delta Air Lines 5 2026-06-11
DAL11 Delta Air Lines 5 2026-07-02
DAL27 - 4 2026-07-10
DAL12 - 4 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 DAL173 SLC → ICN Jul 13, 18:10 UTCJul 14, 06:10 UTC12h 0m
2026-07-12 DAL172 ICN → SLC Jul 12, 10:35 UTCJul 12, 21:40 UTC11h 5m
2026-07-11 DAL159 - Jul 11, 17:00 UTCJul 12, 06:25 UTC13h 25m
2026-07-11 DAL159 DTW → ICN Jul 11, 16:57 UTCJul 12, 06:28 UTC13h 31m
2026-07-11 DAL158 - Jul 11, 01:30 UTCJul 11, 14:15 UTC12h 45m
2026-07-10 DAL27 ATL → ICN Jul 10, 04:10 UTCJul 10, 20:15 UTC16h 5m
2026-07-08 DAL201 - Jul 8, 20:05 UTCJul 8, 20:35 UTC30m
2026-07-08 DAL201 JNB → ATL Jul 8, 20:04 UTCJul 9, 11:40 UTC15h 36m
2026-07-08 DAL200 - Jul 8, 02:25 UTCJul 8, 17:10 UTC14h 45m
2026-07-07 DAL327 LAX → ATL Jul 7, 18:40 UTCJul 7, 22:35 UTC3h 55m
2026-07-07 DAL88 ATL → CDG Jul 7, 03:20 UTCJul 7, 16:05 UTC12h 45m
2026-07-06 DAL89 CDG → ATL Jul 6, 07:30 UTCJul 6, 09:00 UTC1h 30m
2026-07-06 DAL89 CDG → ATL Jul 6, 07:26 UTCJul 6, 21:50 UTC14h 24m
2026-07-06 DAL763 - Jul 6, 01:00 UTCJul 6, 05:05 UTC4h 5m
2026-07-05 DAL327 LAX → ATL Jul 5, 16:50 UTCJul 5, 20:35 UTC3h 45m
2026-07-05 DAL327 LAX → ATL Jul 5, 16:49 UTCJul 5, 20:33 UTC3h 44m
2026-07-05 DAL88 ATL → CDG Jul 5, 02:45 UTCJul 5, 14:40 UTC11h 55m
2026-07-05 DAL88 ATL → CDG Jul 5, 01:47 UTCJul 5, 14:28 UTC12h 41m
2026-07-05 DAL88 ATL → CDG Jul 5, 01:50 UTCJul 5, 02:10 UTC20m
2026-07-04 DAL89 CDG → ATL Jul 4, 06:50 UTCJul 4, 20:50 UTC14h 0m
2026-07-04 DAL763 - Jul 4, 00:00 UTCJul 4, 04:20 UTC4h 20m
2026-07-03 DAL327 - Jul 3, 17:30 UTCJul 3, 21:20 UTC3h 50m
2026-07-03 DAL12 - Jul 3, 01:20 UTCJul 3, 14:55 UTC13h 35m
2026-07-03 DAL12 MEL → LAX Jul 3, 01:19 UTCJul 3, 14:59 UTC13h 40m
2026-07-02 DAL11 LHR → MSP Jul 2, 07:20 UTCJul 2, 07:45 UTC25m
2026-07-02 DAL11 LHR → MSP Jul 2, 07:17 UTCJul 2, 22:46 UTC15h 29m
2026-07-01 DAL88 ATL → CDG Jul 1, 02:25 UTCJul 1, 13:45 UTC11h 20m
2026-07-01 DAL88 ATL → CDG Jul 1, 01:35 UTCJul 1, 01:50 UTC15m
2026-07-01 DAL88 ATL → CDG Jul 1, 01:34 UTCJul 1, 14:00 UTC12h 26m
2026-06-30 DAL89 CDG → ATL Jun 30, 06:15 UTCJun 30, 19:35 UTC13h 20m
2026-06-30 DAL89 CDG → ATL Jun 30, 06:13 UTCJun 30, 20:03 UTC13h 50m
2026-06-29 DAL291 - Jun 29, 14:50 UTCJun 30, 01:19 UTC10h 30m
2026-06-29 DAL290 - Jun 29, 01:14 UTCJun 29, 11:04 UTC9h 50m
2026-06-28 DAL88 ATL → CDG Jun 28, 04:29 UTCJun 28, 15:49 UTC11h 20m
2026-06-28 DAL88 ATL → CDG Jun 28, 03:40 UTCJun 28, 03:55 UTC15m
2026-06-27 DAL89 CDG → ATL Jun 27, 06:50 UTCJun 27, 20:55 UTC14h 5m
2026-06-27 DAL89 CDG → ATL Jun 27, 06:47 UTCJun 27, 20:51 UTC14h 4m
2026-06-26 DAL763 - Jun 26, 23:25 UTCJun 27, 03:25 UTC4h 0m
2026-06-25 DAL201 - Jun 25, 20:14 UTCJun 26, 12:10 UTC15h 55m
2026-06-25 DAL201 JNB → ATL Jun 25, 20:12 UTCJun 26, 12:14 UTC16h 2m
2026-06-25 DAL200 - Jun 25, 02:39 UTCJun 25, 17:09 UTC14h 30m
2026-06-23 DAL201 - Jun 23, 19:59 UTCJun 24, 11:29 UTC15h 30m
2026-06-23 DAL200 - Jun 23, 02:45 UTCJun 23, 17:15 UTC14h 30m
2026-06-22 DAL299 - Jun 22, 13:19 UTCJun 22, 23:24 UTC10h 5m
2026-06-22 DAL299 FCO → ATL Jun 22, 13:18 UTCJun 22, 23:24 UTC10h 6m
2026-06-22 DAL298 - Jun 22, 01:25 UTCJun 22, 03:24 UTC2h 0m
2026-06-22 DAL298 ATL → FCO Jun 22, 01:23 UTCJun 22, 10:12 UTC8h 49m
2026-06-20 DAL201 - Jun 20, 20:20 UTCJun 21, 12:04 UTC15h 45m
2026-06-20 DAL200 - Jun 20, 02:35 UTCJun 20, 17:29 UTC14h 55m
2026-06-18 DAL201 - Jun 18, 20:15 UTCJun 18, 20:35 UTC20m

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 N522DZ page for operator, model, and routing details .

Mode-S A690BF frequently asked

What is Mode-S code A690BF?
A690BF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N522DZ.
Where is Mode-S A690BF registered?
Mode-S code A690BF 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 A690BF broadcasting right now?
Yes. Mode-S A690BF is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A690BF, octal 51510277, decimal 10,916,031.
What flights does A690BF operate?
Mode-S A690BF has broadcast 20 distinct callsigns, including DAL201, DAL88, DAL41, DAL327, DAL200.