Apparatus

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sensors Mode-S transponder

A997CC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N717TW · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
A997CC
Octal
52313714
Decimal
11,114,444
Country
US
Tail
N717TW
Type
B752
No current signal · last broadcast 2d ago
Flights observed
316
Distinct callsigns
20
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A997CC.

Country allocation

The ICAO 24-bit address A997CC 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
DAL318 - 27 2026-07-12
DAL639 - 22 2026-07-11
DAL987 - 21 2026-07-09
DAL392 - 21 2026-07-07
DAL2004 - 17 2026-07-09
DAL507 - 16 2026-07-08
DAL479 - 16 2026-07-10
DAL321 - 16 2026-07-11
DAL695 - 13 2026-07-08
DAL437 - 13 2026-07-10
DAL329 - 10 2026-07-08
DAL2166 - 10 2026-07-09
DAL1732 Delta Air Lines 9 2026-05-09
DAL2286 Delta Air Lines 7 2026-04-30
DAL1488 Delta Air Lines 7 2026-05-04
DAL363 Delta Air Lines 5 2026-06-18
DAL2378 Delta Air Lines 5 2026-05-04
DAL575 Delta Air Lines 4 2026-04-14
DAL551 Delta Air Lines 4 2026-04-15
DAL382 Delta Air Lines 4 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 DAL318 - Jul 12, 03:25 UTCJul 12, 06:35 UTC3h 10m
2026-07-12 DAL318 - Jul 12, 01:40 UTCJul 12, 02:30 UTC50m
2026-07-11 DAL318 - Jul 11, 23:30 UTCJul 12, 01:00 UTC1h 30m
2026-07-11 DAL639 - Jul 11, 14:10 UTCJul 11, 19:20 UTC5h 10m
2026-07-11 DAL321 BOS → LAX Jul 11, 01:00 UTCJul 11, 06:50 UTC5h 50m
2026-07-10 DAL437 - Jul 10, 18:05 UTCJul 10, 22:50 UTC4h 46m
2026-07-10 DAL479 BOS → LAX Jul 10, 10:50 UTCJul 10, 16:35 UTC5h 45m
2026-07-09 DAL2166 LAX → BOS Jul 9, 23:00 UTCJul 10, 04:05 UTC5h 5m
2026-07-09 DAL2004 - Jul 9, 16:40 UTCJul 9, 21:00 UTC4h 20m
2026-07-09 DAL2004 - Jul 9, 15:10 UTCJul 9, 16:35 UTC1h 25m
2026-07-09 DAL987 ATL → BOS Jul 9, 11:20 UTCJul 9, 13:30 UTC2h 10m
2026-07-08 DAL329 - Jul 8, 21:15 UTCJul 9, 01:05 UTC3h 50m
2026-07-08 DAL329 ATL → SNA Jul 8, 15:20 UTCJul 8, 19:15 UTC3h 55m
2026-07-08 DAL695 BOS → ATL Jul 8, 11:00 UTCJul 8, 13:10 UTC2h 10m
2026-07-08 DAL695 BOS → ATL Jul 8, 10:57 UTCJul 8, 13:04 UTC2h 7m
2026-07-08 DAL507 - Jul 8, 04:10 UTCJul 8, 09:30 UTC5h 20m
2026-07-07 DAL392 DCA → LAX Jul 7, 21:15 UTCJul 8, 02:05 UTC4h 50m
2026-07-07 DAL392 - Jul 7, 14:55 UTCJul 7, 19:25 UTC4h 30m
2026-07-07 DAL318 - Jul 7, 00:00 UTCJul 7, 05:20 UTC5h 20m
2026-07-06 DAL639 CVG → DEN Jul 6, 13:45 UTCJul 6, 18:50 UTC5h 5m
2026-07-06 DAL321 - Jul 6, 03:40 UTCJul 6, 09:10 UTC5h 30m
2026-07-05 DAL437 - Jul 5, 18:15 UTCJul 5, 23:35 UTC5h 20m
2026-07-05 DAL479 BOS → LAX Jul 5, 10:35 UTCJul 5, 16:15 UTC5h 40m
2026-07-04 DAL437 - Jul 4, 19:25 UTCJul 5, 00:30 UTC5h 5m
2026-07-03 DAL318 BOS → LAX Jul 3, 20:50 UTCJul 4, 02:20 UTC5h 30m
2026-07-03 DAL639 CVG → DEN Jul 3, 13:50 UTCJul 3, 19:00 UTC5h 10m
2026-07-03 DAL639 CVG → DEN Jul 3, 13:48 UTCJul 3, 18:46 UTC4h 58m
2026-07-02 DAL318 - Jul 2, 20:45 UTCJul 3, 02:30 UTC5h 45m
2026-07-02 DAL639 CVG → DEN Jul 2, 13:50 UTCJul 2, 18:50 UTC5h 0m
2026-07-01 DAL392 - Jul 1, 21:00 UTCJul 2, 02:10 UTC5h 10m
2026-07-01 DAL392 - Jul 1, 14:55 UTCJul 1, 19:20 UTC4h 25m
2026-06-30 DAL392 - Jun 30, 22:35 UTCJul 1, 03:25 UTC4h 50m
2026-06-30 DAL392 - Jun 30, 16:40 UTCJun 30, 21:15 UTC4h 35m
2026-06-29 DAL392 DCA → LAX Jun 29, 21:09 UTCJun 30, 02:15 UTC5h 6m
2026-06-29 DAL392 - Jun 29, 14:44 UTCJun 29, 19:20 UTC4h 35m
2026-06-28 DAL2004 TPA → BOS Jun 28, 16:00 UTCJun 28, 21:30 UTC5h 30m
2026-06-28 DAL2004 TPA → BOS Jun 28, 15:55 UTCJun 28, 21:26 UTC5h 31m
2026-06-28 DAL987 - Jun 28, 14:04 UTCJun 28, 14:14 UTC10m
2026-06-28 DAL987 ATL → BOS Jun 28, 11:39 UTCJun 28, 13:49 UTC2h 10m
2026-06-28 DAL987 ATL → BOS Jun 28, 11:39 UTCJun 28, 14:14 UTC2h 35m
2026-06-28 DAL724 SFO → ATL Jun 28, 00:45 UTCJun 28, 04:44 UTC4h 0m
2026-06-27 DAL750 ATL → SFO Jun 27, 18:24 UTCJun 27, 23:00 UTC4h 35m
2026-06-27 DAL695 BOS → ATL Jun 27, 11:04 UTCJun 27, 13:20 UTC2h 15m
2026-06-27 DAL507 - Jun 27, 04:09 UTCJun 27, 09:00 UTC4h 50m
2026-06-27 DAL507 LAX → BOS Jun 27, 04:06 UTCJun 27, 08:54 UTC4h 48m
2026-06-26 DAL392 - Jun 26, 21:15 UTCJun 27, 02:39 UTC5h 25m
2026-06-26 DAL392 - Jun 26, 14:50 UTCJun 26, 19:09 UTC4h 20m
2026-06-25 DAL318 - Jun 25, 20:39 UTCJun 26, 02:44 UTC6h 5m
2026-06-25 DAL639 CVG → DEN Jun 25, 13:55 UTCJun 25, 18:34 UTC4h 40m
2026-06-24 DAL318 - Jun 24, 21:00 UTCJun 25, 02:49 UTC5h 50m

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 N717TW page for operator, model, and routing details .

Mode-S A997CC frequently asked

What is Mode-S code A997CC?
A997CC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N717TW.
Where is Mode-S A997CC registered?
Mode-S code A997CC 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 A997CC broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A997CC, octal 52313714, decimal 11,114,444.
What flights does A997CC operate?
Mode-S A997CC has broadcast 20 distinct callsigns, including DAL318, DAL639, DAL987, DAL392, DAL2004.