Apparatus

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sensors Mode-S transponder

A6709B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N514DE · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A6709B
Octal
51470233
Decimal
10,907,803
Country
US
Tail
N514DE
Type
A21N
No current signal · last broadcast Jul 26, 17:40 UTC
Flights observed
449
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 17:40 UTC

Last known position

Most recent position reported by Mode-S A6709B.

Country allocation

The ICAO 24-bit address A6709B 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
DAL1961 Delta Air Lines 16 2026-07-26
DAL1966 - 13 2026-07-14
DAL340 Delta Air Lines 10 2026-06-01
DAL1994 Delta Air Lines 10 2026-06-18
DAL683 Delta Air Lines 9 2026-04-24
DAL613 - 9 2026-07-18
DAL328 - 9 2026-06-26
DAL1854 Delta Air Lines 9 2026-07-25
DAL612 - 8 2026-07-18
DAL486 - 8 2026-07-02
DAL1859 Delta Air Lines 8 2026-07-25
DAL1855 Delta Air Lines 8 2026-07-23
DAL785 Delta Air Lines 7 2026-05-06
DAL705 - 7 2026-07-14
DAL485 Delta Air Lines 7 2026-05-31
DAL440 Delta Air Lines 7 2026-06-26
DAL798 - 6 2026-07-14
DAL685 Delta Air Lines 6 2026-05-02
DAL671 - 6 2026-06-17
DAL506 - 5 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL699 JFK → SEA Jul 26, 11:55 UTCJul 26, 17:30 UTC5h 35m
2026-07-26 DAL1961 JFK → SJU Jul 26, 00:00 UTCJul 26, 01:50 UTC1h 50m
2026-07-25 DAL1961 JFK → SJU Jul 25, 22:05 UTCJul 25, 22:15 UTC10m
2026-07-25 DAL1961 JFK → SJU Jul 25, 19:45 UTCJul 25, 20:10 UTC25m
2026-07-25 DAL1961 JFK → SJU Jul 25, 16:55 UTCJul 25, 17:35 UTC40m
2026-07-25 DAL1854 SJU → JFK Jul 25, 14:10 UTCJul 25, 15:20 UTC1h 10m
2026-07-25 DAL1854 SJU → JFK Jul 25, 11:40 UTCJul 25, 11:50 UTC10m
2026-07-25 DAL1859 JFK → SJU Jul 25, 03:20 UTCJul 25, 03:40 UTC20m
2026-07-25 DAL1859 JFK → SJU Jul 25, 00:22 UTCJul 25, 03:47 UTC3h 25m
2026-07-25 DAL1859 JFK → SJU Jul 25, 00:25 UTCJul 25, 01:15 UTC50m
2026-07-24 DAL1955 JFK → MBJ Jul 24, 13:00 UTCJul 24, 21:40 UTC8h 40m
2026-07-23 DAL1855 JFK → STI Jul 23, 20:35 UTCJul 24, 05:05 UTC8h 30m
2026-07-23 DAL9887 EWR → DTW Jul 23, 14:20 UTCJul 23, 17:35 UTC3h 15m
2026-07-22 DAL9887 EWR → DTW Jul 22, 18:50 UTCJul 23, 17:35 UTC22h 45m
2026-07-22 DAL1917 - Jul 22, 16:50 UTCJul 23, 16:45 UTC23h 55m
2026-07-22 DAL1917 - Jul 22, 16:20 UTCJul 23, 14:25 UTC22h 5m
2026-07-22 DAL1961 JFK → SJU Jul 22, 00:50 UTCJul 22, 01:55 UTC1h 5m
2026-07-21 DAL1961 JFK → SJU Jul 21, 22:10 UTCJul 21, 22:30 UTC20m
2026-07-21 DAL1961 JFK → SJU Jul 21, 22:08 UTCJul 22, 01:49 UTC3h 41m
2026-07-21 DAL1961 JFK → SJU Jul 21, 17:30 UTCJul 21, 20:45 UTC3h 15m
2026-07-21 DAL1961 JFK → SJU Jul 21, 17:30 UTCJul 21, 18:10 UTC40m
2026-07-21 DAL1854 SJU → JFK Jul 21, 14:30 UTCJul 21, 15:20 UTC50m
2026-07-21 DAL1854 SJU → JFK Jul 21, 11:50 UTCJul 21, 12:05 UTC15m
2026-07-21 DAL1859 JFK → SJU Jul 21, 01:10 UTCJul 21, 04:20 UTC3h 10m
2026-07-20 DAL1957 MBJ → JFK Jul 20, 12:45 UTCJul 20, 21:55 UTC9h 10m
2026-07-19 DAL1955 JFK → JFK Jul 19, 17:45 UTCJul 20, 02:15 UTC8h 30m
2026-07-18 DAL612 - Jul 18, 19:00 UTCJul 18, 22:45 UTC3h 45m
2026-07-18 DAL612 - Jul 18, 18:10 UTCJul 18, 18:20 UTC10m
2026-07-18 DAL612 AUA → JFK Jul 18, 18:06 UTCJul 18, 22:41 UTC4h 35m
2026-07-18 DAL613 - Jul 18, 15:45 UTCJul 18, 15:55 UTC10m
2026-07-18 DAL613 - Jul 18, 11:55 UTCJul 18, 15:00 UTC3h 5m
2026-07-18 DAL1961 - Jul 18, 00:39 UTCJul 18, 01:30 UTC50m
2026-07-17 DAL1961 - Jul 17, 22:00 UTCJul 17, 22:15 UTC15m
2026-07-17 DAL1961 - Jul 17, 19:49 UTCJul 17, 20:10 UTC20m
2026-07-17 DAL1961 - Jul 17, 16:59 UTCJul 17, 17:40 UTC40m
2026-07-17 DAL1854 - Jul 17, 14:24 UTCJul 17, 14:44 UTC20m
2026-07-17 DAL1854 - Jul 17, 11:50 UTCJul 17, 12:04 UTC15m
2026-07-17 DAL1854 SJU → JFK Jul 17, 11:47 UTCJul 17, 15:12 UTC3h 25m
2026-07-17 DAL1859 - Jul 17, 03:20 UTCJul 17, 03:45 UTC25m
2026-07-17 DAL1859 - Jul 17, 00:30 UTCJul 17, 01:05 UTC35m
2026-07-16 DAL612 - Jul 16, 18:10 UTCJul 16, 22:30 UTC4h 20m
2026-07-16 DAL613 - Jul 16, 15:49 UTCJul 16, 16:09 UTC20m
2026-07-16 DAL613 - Jul 16, 12:05 UTCJul 16, 12:55 UTC50m
2026-07-16 DAL613 JFK → AUA Jul 16, 12:05 UTCJul 16, 16:04 UTC3h 59m
2026-07-15 DAL1969 JFK → JFK Jul 15, 20:05 UTCJul 16, 04:30 UTC8h 25m
2026-07-15 DAL546 - Jul 15, 13:15 UTCJul 15, 17:50 UTC4h 35m
2026-07-14 DAL798 - Jul 14, 23:15 UTCJul 15, 03:30 UTC4h 15m
2026-07-14 DAL1966 SJU → JFK Jul 14, 17:21 UTCJul 14, 20:46 UTC3h 25m
2026-07-14 DAL1966 JFK → JFK Jul 14, 12:20 UTCJul 14, 20:50 UTC8h 30m
2026-07-14 DAL705 SLC → JFK Jul 14, 06:10 UTCJul 14, 10:25 UTC4h 15m

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 N514DE page for operator, model, and routing details .

Mode-S A6709B frequently asked

What is Mode-S code A6709B?
A6709B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N514DE.
Where is Mode-S A6709B registered?
Mode-S code A6709B 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 A6709B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6709B, octal 51470233, decimal 10,907,803.
What flights does A6709B operate?
Mode-S A6709B has broadcast 20 distinct callsigns, including DAL1961, DAL1966, DAL340, DAL1994, DAL683.