Apparatus

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sensors Mode-S transponder

A716F6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N556NW · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
A716F6
Octal
51613366
Decimal
10,950,390
Country
US
Tail
N556NW
Type
B752
Transponder active on ground
Flights observed
466
Distinct callsigns
20
Country
US
Last broadcast
Jul 23, 16:20 UTC

Last known position

Most recent position reported by Mode-S A716F6.

Country allocation

The ICAO 24-bit address A716F6 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 13 2026-07-19
DAL391 Delta Air Lines 11 2026-06-07
DAL348 Delta Air Lines 11 2026-06-16
DAL549 - 8 2026-07-11
DAL2262 Delta Air Lines 8 2026-07-03
DAL1463 - 8 2026-07-09
DAL1462 Delta Air Lines 8 2026-06-01
DAL2881 - 7 2026-07-04
DAL1902 Delta Air Lines 7 2026-07-01
DAL1214 Delta Air Lines 7 2026-05-24
DAL929 - 6 2026-07-19
DAL796 - 6 2026-06-18
DAL607 Delta Air Lines 6 2026-07-23
DAL466 - 6 2026-07-08
DAL1298 Delta Air Lines 6 2026-07-07
DAL1031 - 6 2026-07-18
DAL857 Delta Air Lines 5 2026-06-24
DAL795 Delta Air Lines 5 2026-07-22
DAL2326 Delta Air Lines 5 2026-04-28
DAL2274 - 5 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 DAL607 BOS → LAX Jul 23, 11:25 UTCJul 23, 16:20 UTC4h 55m
2026-07-22 DAL795 BOS → ORD Jul 22, 19:30 UTCJul 22, 23:55 UTC4h 25m
2026-07-22 DAL945 MIA → LGA Jul 22, 14:20 UTCJul 22, 17:50 UTC3h 30m
2026-07-21 DAL748 MSP → LAX Jul 21, 19:40 UTCJul 21, 23:10 UTC3h 30m
2026-07-21 DAL497 JFK → LAX Jul 21, 12:30 UTCJul 21, 17:40 UTC5h 10m
2026-07-20 DAL430 LAS → BOS Jul 20, 18:35 UTCJul 20, 23:10 UTC4h 35m
2026-07-20 DAL430 LAS → BOS Jul 20, 18:34 UTCJul 20, 23:05 UTC4h 31m
2026-07-20 DAL607 JFK → LAS Jul 20, 11:21 UTCJul 20, 15:55 UTC4h 34m
2026-07-20 DAL607 - Jul 20, 11:25 UTCJul 20, 15:30 UTC4h 5m
2026-07-19 DAL795 LAS → JFK Jul 19, 19:41 UTCJul 20, 00:05 UTC4h 24m
2026-07-19 DAL795 LAS → JFK Jul 19, 19:45 UTCJul 20, 00:15 UTC4h 30m
2026-07-19 DAL777 BOS → ORD Jul 19, 14:05 UTCJul 19, 17:35 UTC3h 30m
2026-07-19 DAL929 PHX → ATL Jul 19, 07:00 UTCJul 19, 10:15 UTC3h 15m
2026-07-19 DAL929 PHX → ATL Jul 19, 06:59 UTCJul 19, 10:12 UTC3h 13m
2026-07-18 DAL1135 - Jul 18, 21:55 UTCJul 19, 01:20 UTC3h 25m
2026-07-18 DAL1135 DTW → PHX Jul 18, 21:50 UTCJul 19, 01:14 UTC3h 24m
2026-07-18 DAL1031 ATL → DTW Jul 18, 18:35 UTCJul 18, 20:15 UTC1h 40m
2026-07-18 DAL1031 ATL → DTW Jul 18, 18:35 UTCJul 18, 20:12 UTC1h 37m
2026-07-18 DAL755 LAS → ATL Jul 18, 13:20 UTCJul 18, 17:05 UTC3h 45m
2026-07-18 DAL781 JFK → LAS Jul 18, 02:24 UTCJul 18, 07:12 UTC4h 48m
2026-07-18 DAL781 JFK → LAS Jul 18, 02:25 UTCJul 18, 07:15 UTC4h 51m
2026-07-17 DAL795 LAS → JFK Jul 17, 19:49 UTCJul 18, 00:25 UTC4h 35m
2026-07-17 DAL945 ATL → LAS Jul 17, 14:15 UTCJul 17, 17:40 UTC3h 25m
2026-07-17 DAL1726 TPA → ATL Jul 17, 10:25 UTCJul 17, 11:30 UTC1h 5m
2026-07-17 DAL1726 TPA → ATL Jul 17, 10:24 UTCJul 17, 11:27 UTC1h 3m
2026-07-17 DAL1560 ATL → TPA Jul 17, 03:32 UTCJul 17, 04:36 UTC1h 4m
2026-07-17 DAL1560 ATL → TPA Jul 17, 03:34 UTCJul 17, 04:39 UTC1h 5m
2026-07-16 DAL386 PHX → ATL Jul 16, 22:05 UTCJul 17, 01:29 UTC3h 25m
2026-07-16 DAL813 - Jul 16, 17:25 UTCJul 16, 20:45 UTC3h 20m
2026-07-16 DAL1433 - Jul 16, 14:40 UTCJul 16, 15:49 UTC1h 10m
2026-07-16 DAL1885 MCO → MSP Jul 16, 02:45 UTCJul 16, 05:35 UTC2h 50m
2026-07-15 DAL1885 MSP → MCO Jul 15, 21:50 UTCJul 16, 00:35 UTC2h 45m
2026-07-15 DAL447 - Jul 15, 14:40 UTCJul 15, 19:30 UTC4h 50m
2026-07-15 DAL411 MSP → ANC Jul 15, 03:35 UTCJul 15, 09:00 UTC5h 25m
2026-07-15 DAL411 MSP → ANC Jul 15, 03:30 UTCJul 15, 09:08 UTC5h 38m
2026-07-14 DAL2274 PHX → MSP Jul 14, 21:55 UTCJul 15, 00:35 UTC2h 39m
2026-07-14 DAL2274 PHX → MSP Jul 14, 21:52 UTCJul 15, 00:29 UTC2h 37m
2026-07-14 DAL2274 MSP → PHX Jul 14, 17:55 UTCJul 14, 20:30 UTC2h 35m
2026-07-14 DAL9964 ATL → MSP Jul 14, 14:30 UTCJul 14, 16:30 UTC2h 0m
2026-07-14 DAL2569 - Jul 14, 12:25 UTCJul 14, 13:15 UTC50m
2026-07-14 DAL1001 - Jul 14, 02:10 UTCJul 14, 03:00 UTC50m
2026-07-14 DAL1001 ATL → JAX Jul 14, 02:10 UTCJul 14, 03:03 UTC53m
2026-07-13 DAL1785 - Jul 13, 22:10 UTCJul 13, 23:40 UTC1h 30m
2026-07-13 DAL1785 - Jul 13, 19:35 UTCJul 13, 19:45 UTC10m
2026-07-13 DAL2350 - Jul 13, 13:50 UTCJul 13, 17:05 UTC3h 15m
2026-07-13 DAL929 - Jul 13, 07:50 UTCJul 13, 10:55 UTC3h 5m
2026-07-12 DAL1135 - Jul 12, 21:45 UTCJul 13, 01:10 UTC3h 25m
2026-07-12 DAL1031 ATL → DTW Jul 12, 18:32 UTCJul 12, 20:03 UTC1h 31m
2026-07-12 DAL1031 - Jul 12, 18:35 UTCJul 12, 20:05 UTC1h 30m
2026-07-12 DAL755 LAS → ATL Jul 12, 13:25 UTCJul 12, 16:50 UTC3h 25m

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 N556NW page for operator, model, and routing details .

Mode-S A716F6 frequently asked

What is Mode-S code A716F6?
A716F6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N556NW.
Where is Mode-S A716F6 registered?
Mode-S code A716F6 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 A716F6 broadcasting right now?
Mode-S A716F6 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A716F6, octal 51613366, decimal 10,950,390.
What flights does A716F6 operate?
Mode-S A716F6 has broadcast 20 distinct callsigns, including DAL777, DAL391, DAL348, DAL549, DAL2262.