Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A8DEF1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N6706Q · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
A8DEF1
Octal
52157361
Decimal
11,067,121
Country
US
Tail
N6706Q
Type
B752
Broadcasting now · callsign DAL982 · 37,000 ft
Flights observed
462
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Current position

A8DEF1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A8DEF1 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
DAL777 Delta Air Lines 12 2026-07-22
DAL983 - 10 2026-07-11
DAL982 - 8 2026-07-11
DAL748 Delta Air Lines 8 2026-07-26
DAL1462 Delta Air Lines 8 2026-05-18
DAL2350 - 7 2026-07-09
DAL1830 - 7 2026-07-15
DAL1823 Delta Air Lines 7 2026-06-19
DAL1611 - 7 2026-07-08
DAL1217 - 7 2026-07-10
DAL625 - 6 2026-06-18
DAL2836 Delta Air Lines 6 2026-06-04
DAL2238 Delta Air Lines 6 2026-07-25
DAL1937 - 6 2026-06-29
DAL1720 Delta Air Lines 6 2026-07-25
DAL1463 - 6 2026-07-19
DAL1101 - 6 2026-06-17
DAL1089 - 6 2026-07-04
DAL2881 - 5 2026-07-18
DAL2345 Delta Air Lines 5 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL748 MSP → LAX Jul 26, 19:00 UTCJul 26, 22:15 UTC3h 15m
2026-07-26 DAL2262 ORD → LGA Jul 26, 14:30 UTCJul 26, 17:15 UTC2h 45m
2026-07-25 DAL2238 JFK → MIA Jul 25, 22:40 UTCJul 26, 01:30 UTC2h 50m
2026-07-25 DAL2238 JFK → MIA Jul 25, 16:20 UTCJul 25, 19:10 UTC2h 50m
2026-07-25 DAL2263 TPA → MSP Jul 25, 11:50 UTCJul 25, 14:55 UTC3h 5m
2026-07-25 DAL2263 TPA → MSP Jul 25, 11:50 UTCJul 25, 14:46 UTC2h 56m
2026-07-25 DAL1720 BOS → PHX Jul 25, 01:20 UTCJul 25, 02:35 UTC1h 15m
2026-07-24 DAL3014 ATL → BHM Jul 24, 22:48 UTCJul 24, 23:28 UTC40m
2026-07-24 DAL3014 ATL → BHM Jul 24, 22:50 UTCJul 24, 23:30 UTC40m
2026-07-24 DAL3014 ATL → BHM Jul 24, 19:24 UTCJul 24, 20:06 UTC42m
2026-07-24 DAL3014 ATL → BHM Jul 24, 19:25 UTCJul 24, 20:10 UTC45m
2026-07-24 DAL901 BOS → ATL Jul 24, 14:25 UTCJul 24, 17:45 UTC3h 20m
2026-07-23 DAL1135 DTW → PHX Jul 23, 21:05 UTCJul 24, 00:40 UTC3h 35m
2026-07-23 DAL1031 ATL → CHS Jul 23, 18:00 UTCJul 23, 19:25 UTC1h 25m
2026-07-23 DAL2856 FLL → CVG Jul 23, 14:40 UTCJul 23, 16:10 UTC1h 30m
2026-07-23 DAL1646 EWR → ATL Jul 23, 11:15 UTCJul 23, 12:40 UTC1h 25m
2026-07-23 DAL879 LGA → ATL Jul 23, 05:20 UTCJul 23, 08:45 UTC3h 25m
2026-07-22 DAL722 BOS → DTW Jul 22, 23:05 UTCJul 23, 02:40 UTC3h 35m
2026-07-22 DAL777 BOS → ORD Jul 22, 18:00 UTCJul 22, 21:25 UTC3h 25m
2026-07-22 DAL777 BOS → ORD Jul 22, 12:45 UTCJul 22, 16:20 UTC3h 35m
2026-07-21 DAL1525 SNA → SEA Jul 21, 20:30 UTCJul 21, 21:30 UTC1h 0m
2026-07-21 DAL1525 SNA → SEA Jul 21, 18:15 UTCJul 21, 19:15 UTC1h 0m
2026-07-21 DAL2856 FLL → CVG Jul 21, 15:05 UTCJul 21, 16:35 UTC1h 30m
2026-07-21 DAL1646 EWR → ATL Jul 21, 11:20 UTCJul 21, 12:15 UTC55m
2026-07-21 DAL1646 EWR → ATL Jul 21, 11:18 UTCJul 21, 12:51 UTC1h 33m
2026-07-21 DAL3132 MSY → ATL Jul 21, 02:40 UTCJul 21, 03:40 UTC1h 0m
2026-07-20 DAL3132 MSY → ATL Jul 20, 22:00 UTCJul 20, 23:00 UTC1h 0m
2026-07-20 DAL721 SFO → ATL Jul 20, 14:30 UTCJul 20, 18:40 UTC4h 10m
2026-07-20 DAL826 BOS → DTW Jul 20, 01:50 UTCJul 20, 05:35 UTC3h 45m
2026-07-20 DAL826 BOS → DTW Jul 20, 01:50 UTCJul 20, 05:29 UTC3h 39m
2026-07-19 DAL406 ATL → ATL Jul 19, 15:25 UTCJul 20, 00:05 UTC8h 40m
2026-07-19 DAL1463 MCO → ATL Jul 19, 12:20 UTCJul 19, 13:20 UTC1h 0m
2026-07-19 DAL1463 MCO → ATL Jul 19, 12:20 UTCJul 19, 13:23 UTC1h 3m
2026-07-18 DAL2881 ATL → MCO Jul 18, 23:30 UTCJul 19, 00:35 UTC1h 5m
2026-07-18 DAL777 BOS → ORD Jul 18, 18:00 UTCJul 18, 21:40 UTC3h 40m
2026-07-18 DAL777 BOS → ORD Jul 18, 12:50 UTCJul 18, 16:20 UTC3h 30m
2026-07-18 DAL929 - Jul 18, 07:20 UTCJul 18, 10:35 UTC3h 15m
2026-07-18 DAL842 ATL → PHX Jul 18, 02:40 UTCJul 18, 05:50 UTC3h 11m
2026-07-17 DAL406 ATL → ATL Jul 17, 15:25 UTCJul 18, 00:25 UTC9h 0m
2026-07-17 DAL2569 - Jul 17, 12:35 UTCJul 17, 13:20 UTC45m
2026-07-17 DAL1001 ATL → JAX Jul 17, 02:20 UTCJul 17, 03:07 UTC47m
2026-07-17 DAL1001 ATL → JAX Jul 17, 02:20 UTCJul 17, 03:10 UTC50m
2026-07-16 DAL1425 TPA → ATL Jul 16, 23:25 UTCJul 17, 00:35 UTC1h 10m
2026-07-16 DAL1425 ATL → TPA Jul 16, 20:45 UTCJul 16, 21:50 UTC1h 5m
2026-07-16 DAL857 LAS → ATL Jul 16, 07:50 UTCJul 16, 11:25 UTC3h 35m
2026-07-16 DAL825 ATL → LAS Jul 16, 01:50 UTCJul 16, 05:25 UTC3h 35m
2026-07-15 DAL1831 GUA → ATL Jul 15, 19:10 UTCJul 15, 22:15 UTC3h 5m
2026-07-15 DAL1830 ATL → GUA Jul 15, 14:20 UTCJul 15, 17:20 UTC3h 0m
2026-07-15 DAL1830 ATL → GUA Jul 15, 14:20 UTCJul 15, 17:14 UTC2h 54m
2026-07-13 DAL2856 - Jul 13, 14:55 UTCJul 13, 16:15 UTC1h 20m

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 N6706Q page for operator, model, and routing details .

Mode-S A8DEF1 frequently asked

What is Mode-S code A8DEF1?
A8DEF1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N6706Q.
Where is Mode-S A8DEF1 registered?
Mode-S code A8DEF1 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 A8DEF1 broadcasting right now?
Yes. Mode-S A8DEF1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8DEF1, octal 52157361, decimal 11,067,121.
What flights does A8DEF1 operate?
Mode-S A8DEF1 has broadcast 20 distinct callsigns, including DAL777, DAL983, DAL982, DAL748, DAL1462.