Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD077B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N939DZ · operated by DELTA AIR LINES INC

Hex
AD077B
Octal
53203573
Decimal
11,339,643
Country
US
Tail
N939DZ
Type
B739
No current signal · last broadcast Jul 26, 21:05 UTC
Flights observed
702
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:05 UTC

Last known position

Most recent position reported by Mode-S AD077B.

Country allocation

The ICAO 24-bit address AD077B 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
DAL2867 Delta Air Lines 20 2026-07-23
DAL2026 Delta Air Lines 18 2026-07-24
DAL2052 Delta Air Lines 17 2026-07-01
DAL1552 Delta Air Lines 17 2026-07-24
DAL2542 - 15 2026-06-21
DAL880 Delta Air Lines 14 2026-05-31
DAL3126 Delta Air Lines 13 2026-07-26
DAL3069 Delta Air Lines 13 2026-07-24
DAL3054 Delta Air Lines 13 2026-05-31
DAL1481 Delta Air Lines 13 2026-07-26
DAL552 - 12 2026-07-11
DAL2600 Delta Air Lines 12 2026-05-23
DAL1530 Delta Air Lines 12 2026-06-03
DAL3059 Delta Air Lines 11 2026-07-22
DAL1273 - 11 2026-07-15
DAL3089 Delta Air Lines 10 2026-05-25
DAL3067 - 10 2026-07-23
DAL2978 Delta Air Lines 10 2026-07-25
DAL2952 - 10 2026-07-03
DAL3152 Delta Air Lines 9 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL3126 IND → ATL Jul 26, 19:55 UTCJul 26, 21:05 UTC1h 10m
2026-07-26 DAL1481 SAN → SEA Jul 26, 17:15 UTCJul 26, 18:10 UTC55m
2026-07-26 DAL1481 SAN → SEA Jul 26, 17:12 UTCJul 26, 18:04 UTC52m
2026-07-26 DAL1481 SAN → SEA Jul 26, 14:45 UTCJul 26, 15:35 UTC50m
2026-07-26 DAL3129 PNS → ATL Jul 26, 12:05 UTCJul 26, 12:55 UTC50m
2026-07-26 DAL2807 LGA → BOS Jul 26, 02:45 UTCJul 26, 03:20 UTC35m
2026-07-25 DAL3056 ATL → DAB Jul 25, 23:15 UTCJul 26, 00:25 UTC1h 10m
2026-07-25 DAL3056 ATL → DAB Jul 25, 20:35 UTCJul 25, 21:35 UTC1h 0m
2026-07-25 DAL2978 MSP → YYC Jul 25, 16:05 UTCJul 25, 17:20 UTC1h 15m
2026-07-25 DAL2978 MSP → YYC Jul 25, 16:02 UTCJul 25, 17:20 UTC1h 18m
2026-07-25 DAL2978 MSP → YYC Jul 25, 13:10 UTCJul 25, 14:25 UTC1h 15m
2026-07-25 DAL1490 ATL → BNA Jul 25, 02:30 UTCJul 25, 03:15 UTC45m
2026-07-25 DAL1490 ATL → BNA Jul 25, 00:40 UTCJul 25, 01:15 UTC35m
2026-07-24 DAL2026 ATL → PVD Jul 24, 20:45 UTCJul 24, 21:40 UTC55m
2026-07-24 DAL2026 ATL → PVD Jul 24, 17:25 UTCJul 24, 18:20 UTC55m
2026-07-24 DAL3069 BNA → ATL Jul 24, 15:05 UTCJul 24, 15:50 UTC45m
2026-07-24 DAL3069 BNA → ATL Jul 24, 12:45 UTCJul 24, 13:25 UTC40m
2026-07-24 DAL1552 IAH → DTW Jul 24, 09:20 UTCJul 24, 10:15 UTC55m
2026-07-24 DAL1552 IAH → DTW Jul 24, 09:17 UTCJul 24, 10:13 UTC56m
2026-07-24 DAL1154 SLC → SEA Jul 24, 02:25 UTCJul 24, 03:25 UTC1h 0m
2026-07-23 DAL3152 SDF → ATL Jul 23, 23:10 UTCJul 24, 00:20 UTC1h 10m
2026-07-23 DAL3152 SDF → ATL Jul 23, 20:15 UTCJul 23, 21:25 UTC1h 10m
2026-07-23 DAL2867 ATL → EWR Jul 23, 18:00 UTCJul 23, 18:40 UTC40m
2026-07-23 DAL2867 ATL → EWR Jul 23, 17:56 UTCJul 23, 18:37 UTC41m
2026-07-23 DAL2867 ATL → EWR Jul 23, 15:50 UTCJul 23, 16:30 UTC40m
2026-07-23 DAL3067 - Jul 23, 13:05 UTCJul 23, 13:55 UTC50m
2026-07-22 DAL3059 PNS → ATL Jul 22, 23:00 UTCJul 22, 23:50 UTC50m
2026-07-22 DAL2026 ATL → PVD Jul 22, 19:50 UTCJul 22, 20:50 UTC1h 0m
2026-07-22 DAL2026 ATL → PVD Jul 22, 17:15 UTCJul 22, 18:20 UTC1h 5m
2026-07-22 DAL3069 BNA → ATL Jul 22, 15:05 UTCJul 22, 15:50 UTC45m
2026-07-22 DAL3069 BNA → ATL Jul 22, 12:40 UTCJul 22, 13:20 UTC40m
2026-07-21 DAL1568 - Jul 21, 22:30 UTCJul 22, 00:20 UTC1h 50m
2026-07-21 DAL1568 - Jul 21, 19:35 UTCJul 21, 21:10 UTC1h 35m
2026-07-21 DAL851 YYC → MSP Jul 21, 16:55 UTCJul 21, 17:40 UTC45m
2026-07-21 DAL2937 - Jul 21, 14:45 UTCJul 21, 15:45 UTC1h 0m
2026-07-21 DAL2478 - Jul 21, 11:50 UTCJul 21, 12:45 UTC55m
2026-07-20 DAL1518 ATL → RDU Jul 20, 23:55 UTCJul 21, 01:40 UTC1h 45m
2026-07-20 DAL3095 - Jul 20, 21:30 UTCJul 20, 22:00 UTC30m
2026-07-20 DAL3095 GSP → ATL Jul 20, 21:25 UTCJul 20, 22:00 UTC35m
2026-07-20 DAL3095 - Jul 20, 19:30 UTCJul 20, 20:05 UTC35m
2026-07-20 DAL851 YYC → MSP Jul 20, 17:00 UTCJul 20, 17:50 UTC50m
2026-07-20 DAL2937 - Jul 20, 14:50 UTCJul 20, 15:40 UTC50m
2026-07-20 DAL2937 ATL → MEM Jul 20, 14:50 UTCJul 20, 15:41 UTC51m
2026-07-20 DAL3129 - Jul 20, 12:45 UTCJul 20, 13:30 UTC45m
2026-07-20 DAL2807 ATL → PNS Jul 20, 06:55 UTCJul 20, 07:45 UTC50m
2026-07-20 DAL3059 - Jul 20, 01:45 UTCJul 20, 02:30 UTC45m
2026-07-19 DAL3059 ATL → PNS Jul 19, 23:50 UTCJul 20, 00:40 UTC50m
2026-07-19 DAL2026 ATL → PVD Jul 19, 20:25 UTCJul 19, 21:20 UTC55m
2026-07-19 DAL2026 ATL → PVD Jul 19, 17:50 UTCJul 19, 19:00 UTC1h 10m
2026-07-19 DAL3067 - Jul 19, 13:35 UTCJul 19, 14:20 UTC45m

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 N939DZ page for operator, model, and routing details .

Mode-S AD077B frequently asked

What is Mode-S code AD077B?
AD077B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N939DZ.
Where is Mode-S AD077B registered?
Mode-S code AD077B 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 AD077B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD077B, octal 53203573, decimal 11,339,643.
What flights does AD077B operate?
Mode-S AD077B has broadcast 20 distinct callsigns, including DAL2867, DAL2026, DAL2052, DAL1552, DAL2542.