Apparatus

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sensors Mode-S transponder

A6A33F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N527DE · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A6A33F
Octal
51521477
Decimal
10,920,767
Country
US
Tail
N527DE
Type
A21N
Broadcasting now · callsign DAL648 · 32,000 ft
Flights observed
429
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:50 UTC

Current position

A6A33F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A6A33F 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
DAL1780 Delta Air Lines 12 2026-05-11
DAL1966 Delta Air Lines 11 2026-07-25
DAL612 - 9 2026-07-15
DAL1855 Delta Air Lines 9 2026-07-26
DAL1975 - 8 2026-07-02
DAL1961 - 8 2026-07-14
DAL1854 - 8 2026-07-13
DAL613 - 7 2026-07-15
DAL328 - 7 2026-06-20
DAL1943 - 7 2026-07-16
DAL1045 - 7 2026-07-05
DAL568 Delta Air Lines 6 2026-05-06
DAL546 Delta Air Lines 6 2026-07-26
DAL473 Delta Air Lines 6 2026-05-11
DAL340 Delta Air Lines 6 2026-06-01
DAL1969 Delta Air Lines 6 2026-07-25
DAL1917 Delta Air Lines 6 2026-06-18
DAL1859 - 6 2026-07-13
DAL1698 - 6 2026-06-25
DAL643 Delta Air Lines 5 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL1855 JFK → STI Jul 26, 20:10 UTCJul 26, 20:50 UTC40m
2026-07-26 DAL546 SFO → JFK Jul 26, 13:15 UTCJul 26, 17:40 UTC4h 25m
2026-07-26 DAL546 SFO → JFK Jul 26, 13:13 UTCJul 26, 17:35 UTC4h 22m
2026-07-25 DAL798 CVG → SLC Jul 25, 23:10 UTCJul 26, 03:55 UTC4h 45m
2026-07-25 DAL1966 SAL → LAX Jul 25, 17:50 UTCJul 25, 21:10 UTC3h 20m
2026-07-25 DAL1966 SAL → LAX Jul 25, 17:41 UTCJul 25, 21:04 UTC3h 23m
2026-07-25 DAL1966 SAL → LAX Jul 25, 15:55 UTCJul 25, 16:25 UTC30m
2026-07-25 DAL1966 SAL → LAX Jul 25, 12:25 UTCJul 25, 14:10 UTC1h 45m
2026-07-25 DAL1969 STI → JFK Jul 25, 03:45 UTCJul 25, 04:45 UTC1h 0m
2026-07-25 DAL1969 STI → JFK Jul 25, 01:23 UTCJul 25, 04:36 UTC3h 13m
2026-07-24 DAL1855 JFK → STI Jul 24, 19:50 UTCJul 24, 20:45 UTC55m
2026-07-24 DAL1855 JFK → STI Jul 24, 19:50 UTCJul 24, 23:00 UTC3h 10m
2026-07-24 DAL546 SFO → JFK Jul 24, 13:15 UTCJul 24, 17:35 UTC4h 20m
2026-07-24 DAL546 SFO → JFK Jul 24, 13:13 UTCJul 24, 17:35 UTC4h 22m
2026-07-24 DAL784 LGA → ORD Jul 24, 01:50 UTCJul 24, 06:30 UTC4h 40m
2026-07-23 DAL1966 SAL → LAX Jul 23, 20:25 UTCJul 23, 21:20 UTC55m
2026-07-23 DAL1966 SAL → LAX Jul 23, 17:55 UTCJul 23, 18:10 UTC15m
2026-07-23 DAL1966 SAL → LAX Jul 23, 16:10 UTCJul 23, 16:30 UTC20m
2026-07-23 DAL1966 - Jul 23, 12:45 UTCJul 23, 14:05 UTC1h 20m
2026-07-23 DAL452 JFK → SEA Jul 23, 06:05 UTCJul 23, 10:30 UTC4h 25m
2026-07-22 DAL786 ATL → LEX Jul 22, 22:30 UTCJul 23, 04:10 UTC5h 40m
2026-07-22 DAL786 ATL → LEX Jul 22, 14:30 UTCJul 22, 18:50 UTC4h 20m
2026-07-22 DAL394 SJC → ATL Jul 22, 07:17 UTCJul 22, 12:25 UTC5h 8m
2026-07-21 DAL344 SEA → LIH Jul 21, 22:45 UTCJul 21, 23:35 UTC50m
2026-07-21 DAL347 HNL → SLC Jul 21, 13:55 UTCJul 21, 18:35 UTC4h 40m
2026-07-21 DAL347 HNL → SLC Jul 21, 13:20 UTCJul 21, 13:50 UTC30m
2026-07-21 DAL2056 IAH → LAX Jul 21, 00:40 UTCJul 21, 04:35 UTC3h 55m
2026-07-20 DAL1647 LAX → SLC Jul 20, 20:20 UTCJul 20, 21:45 UTC1h 25m
2026-07-20 DAL504 - Jul 20, 13:55 UTCJul 20, 18:20 UTC4h 25m
2026-07-20 DAL1513 BOS → MCO Jul 20, 00:40 UTCJul 20, 03:15 UTC2h 35m
2026-07-19 DAL2591 DTW → IND Jul 19, 20:30 UTCJul 19, 22:50 UTC2h 20m
2026-07-19 DAL799 - Jul 19, 15:25 UTCJul 19, 18:35 UTC3h 10m
2026-07-19 DAL799 LAX → MSP Jul 19, 15:21 UTCJul 19, 18:27 UTC3h 6m
2026-07-19 DAL658 - Jul 19, 12:05 UTCJul 19, 12:40 UTC35m
2026-07-19 DAL658 - Jul 19, 07:45 UTCJul 19, 08:05 UTC20m
2026-07-18 DAL419 LAX → SFO Jul 18, 23:40 UTCJul 19, 05:05 UTC5h 25m
2026-07-18 DAL332 LAX → JFK Jul 18, 16:00 UTCJul 18, 21:40 UTC5h 40m
2026-07-18 DAL2436 MCO → BOS Jul 18, 11:05 UTCJul 18, 13:45 UTC2h 40m
2026-07-18 DAL2436 MCO → BOS Jul 18, 11:05 UTCJul 18, 13:40 UTC2h 35m
2026-07-18 DAL1513 BOS → MCO Jul 18, 01:00 UTCJul 18, 03:30 UTC2h 31m
2026-07-17 DAL2591 MSP → BOS Jul 17, 20:44 UTCJul 17, 23:00 UTC2h 15m
2026-07-17 DAL799 - Jul 17, 15:35 UTCJul 17, 18:44 UTC3h 10m
2026-07-17 DAL435 - Jul 17, 06:50 UTCJul 17, 11:45 UTC4h 55m
2026-07-16 DAL345 SEA → LIH Jul 16, 23:27 UTCJul 17, 05:09 UTC5h 42m
2026-07-16 DAL345 - Jul 16, 23:29 UTCJul 17, 04:59 UTC5h 30m
2026-07-16 DAL1719 JFK → SEA Jul 16, 15:49 UTCJul 16, 21:35 UTC5h 45m
2026-07-16 DAL1942 - Jul 16, 12:55 UTCJul 16, 13:40 UTC45m
2026-07-16 DAL1943 - Jul 16, 01:45 UTCJul 16, 02:45 UTC1h 0m
2026-07-16 DAL1943 JFK → SDQ Jul 16, 01:44 UTCJul 16, 04:55 UTC3h 11m
2026-07-15 DAL612 - Jul 15, 21:20 UTCJul 15, 22:10 UTC50m

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 N527DE page for operator, model, and routing details .

Mode-S A6A33F frequently asked

What is Mode-S code A6A33F?
A6A33F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N527DE.
Where is Mode-S A6A33F registered?
Mode-S code A6A33F 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 A6A33F broadcasting right now?
Yes. Mode-S A6A33F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6A33F, octal 51521477, decimal 10,920,767.
What flights does A6A33F operate?
Mode-S A6A33F has broadcast 20 distinct callsigns, including DAL1780, DAL1966, DAL612, DAL1855, DAL1975.