Apparatus

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sensors Mode-S transponder

A67F81

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N518DQ · AIRBUS A-321neo · operated by DELTA AIR LINES INC

Hex
A67F81
Octal
51477601
Decimal
10,911,617
Country
US
Tail
N518DQ
Type
A21N
Broadcasting now · callsign DAL568 · 28,725 ft
Flights observed
473
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:50 UTC

Current position

A67F81 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A67F81 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
DAL658 - 11 2026-07-22
DAL422 - 10 2026-07-16
DAL1209 Delta Air Lines 10 2026-07-23
DAL419 Delta Air Lines 9 2026-07-22
DAL1210 - 9 2026-07-09
DAL328 - 8 2026-07-10
DAL311 - 8 2026-06-25
DAL1780 - 8 2026-06-22
DAL829 - 7 2026-07-09
DAL1961 Delta Air Lines 7 2026-06-12
DAL1318 - 7 2026-07-17
DAL785 Delta Air Lines 6 2026-04-17
DAL482 Delta Air Lines 6 2026-07-22
DAL324 Delta Air Lines 6 2026-07-18
DAL1854 Delta Air Lines 6 2026-06-12
DAL1719 - 6 2026-07-14
DAL899 Delta Air Lines 5 2026-07-23
DAL875 - 5 2026-06-18
DAL613 - 5 2026-07-13
DAL612 - 5 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2921 SLC → SEA Jul 26, 19:55 UTCJul 26, 21:40 UTC1h 45m
2026-07-26 DAL387 ATL → SLC Jul 26, 14:35 UTCJul 26, 18:10 UTC3h 35m
2026-07-26 DAL652 DEN → BOS Jul 26, 07:10 UTCJul 26, 11:20 UTC4h 10m
2026-07-25 DAL506 LGA → ATL Jul 25, 22:50 UTCJul 26, 04:25 UTC5h 35m
2026-07-25 DAL506 LGA → ATL Jul 25, 15:30 UTCJul 25, 20:45 UTC5h 15m
2026-07-25 DAL375 ATL → BOS Jul 25, 12:40 UTCJul 25, 13:30 UTC50m
2026-07-25 DAL375 ATL → BOS Jul 25, 08:15 UTCJul 25, 08:25 UTC10m
2026-07-24 DAL428 SJC → ATL Jul 24, 22:35 UTCJul 25, 03:45 UTC5h 10m
2026-07-24 DAL2119 MSY → LGA Jul 24, 16:45 UTCJul 24, 20:00 UTC3h 15m
2026-07-24 DAL2119 MSY → LGA Jul 24, 16:42 UTCJul 24, 19:54 UTC3h 12m
2026-07-24 DAL1138 BOS → RDU Jul 24, 11:35 UTCJul 24, 14:20 UTC2h 45m
2026-07-23 DAL702 SLC → BOS Jul 23, 23:45 UTCJul 24, 03:40 UTC3h 55m
2026-07-23 DAL1209 IAH → LGA Jul 23, 20:40 UTCJul 23, 22:10 UTC1h 30m
2026-07-23 DAL1209 IAH → LGA Jul 23, 17:45 UTCJul 23, 19:05 UTC1h 20m
2026-07-23 DAL830 ATL → SLC Jul 23, 12:25 UTCJul 23, 15:50 UTC3h 25m
2026-07-23 DAL830 ATL → SLC Jul 23, 12:24 UTCJul 23, 15:47 UTC3h 23m
2026-07-23 DAL899 LAX → ATL Jul 23, 06:35 UTCJul 23, 10:20 UTC3h 45m
2026-07-23 DAL1142 SLC → JFK Jul 23, 03:30 UTCJul 23, 04:55 UTC1h 25m
2026-07-22 DAL2036 BOS → NAS Jul 22, 21:55 UTCJul 23, 02:00 UTC4h 5m
2026-07-22 DAL482 JFK → ATL Jul 22, 16:00 UTCJul 22, 20:30 UTC4h 30m
2026-07-22 DAL658 HNL → LAX Jul 22, 07:52 UTCJul 22, 12:25 UTC4h 33m
2026-07-22 DAL419 LAX → SFO Jul 22, 00:45 UTCJul 22, 12:30 UTC11h 45m
2026-07-21 DAL384 JFK → SLC Jul 21, 17:15 UTCJul 21, 23:00 UTC5h 45m
2026-07-21 DAL571 ATL → LGA Jul 21, 05:25 UTCJul 21, 10:20 UTC4h 55m
2026-07-20 DAL571 ATL → LGA Jul 20, 21:55 UTCJul 21, 03:10 UTC5h 15m
2026-07-20 DAL459 JFK → SAN Jul 20, 15:00 UTCJul 20, 19:30 UTC4h 30m
2026-07-20 DAL394 SJC → ATL Jul 20, 11:45 UTCJul 20, 12:30 UTC45m
2026-07-19 DAL344 SEA → LIH Jul 19, 22:10 UTCJul 19, 23:00 UTC50m
2026-07-19 DAL344 SEA → LIH Jul 19, 22:07 UTCJul 20, 03:36 UTC5h 29m
2026-07-19 DAL648 MSP → CUN Jul 19, 15:30 UTCJul 19, 20:10 UTC4h 40m
2026-07-19 DAL652 DEN → BOS Jul 19, 07:15 UTCJul 19, 11:25 UTC4h 10m
2026-07-19 DAL652 DEN → BOS Jul 19, 07:12 UTCJul 19, 11:19 UTC4h 7m
2026-07-18 DAL324 LAX → JFK Jul 18, 23:40 UTCJul 19, 05:25 UTC5h 45m
2026-07-18 DAL499 DEN → BNH Jul 18, 18:45 UTCJul 18, 22:10 UTC3h 25m
2026-07-18 DAL499 BOS → DEN Jul 18, 12:00 UTCJul 18, 15:50 UTC3h 50m
2026-07-17 DAL702 SLC → BOS Jul 17, 23:50 UTCJul 18, 03:50 UTC4h 1m
2026-07-17 DAL1209 PDX → SLC Jul 17, 20:40 UTCJul 17, 22:20 UTC1h 40m
2026-07-17 DAL1209 SLC → PDX Jul 17, 17:35 UTCJul 17, 19:00 UTC1h 25m
2026-07-17 DAL1209 SLC → PDX Jul 17, 17:30 UTCJul 17, 18:54 UTC1h 24m
2026-07-17 DAL1318 - Jul 17, 14:30 UTCJul 17, 15:55 UTC1h 25m
2026-07-16 DAL422 - Jul 16, 21:40 UTCJul 16, 22:15 UTC35m
2026-07-16 DAL422 - Jul 16, 17:20 UTCJul 16, 17:40 UTC20m
2026-07-16 DAL422 HNL → LAX Jul 16, 17:18 UTCJul 16, 22:13 UTC4h 55m
2026-07-16 DAL443 - Jul 16, 02:15 UTCJul 16, 07:35 UTC5h 20m
2026-07-16 DAL443 LAX → HNL Jul 16, 02:12 UTCJul 16, 07:23 UTC5h 11m
2026-07-15 DAL883 - Jul 15, 20:35 UTCJul 16, 00:35 UTC4h 0m
2026-07-15 DAL733 - Jul 15, 14:25 UTCJul 15, 18:25 UTC4h 0m
2026-07-15 DAL733 LAX → DTW Jul 15, 14:21 UTCJul 15, 18:24 UTC4h 3m
2026-07-15 DAL658 - Jul 15, 11:55 UTCJul 15, 12:35 UTC40m
2026-07-15 DAL658 - Jul 15, 07:45 UTCJul 15, 08:05 UTC20m

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 N518DQ page for operator, model, and routing details .

Mode-S A67F81 frequently asked

What is Mode-S code A67F81?
A67F81 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N518DQ.
Where is Mode-S A67F81 registered?
Mode-S code A67F81 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 A67F81 broadcasting right now?
Yes. Mode-S A67F81 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A67F81, octal 51477601, decimal 10,911,617.
What flights does A67F81 operate?
Mode-S A67F81 has broadcast 20 distinct callsigns, including DAL658, DAL422, DAL1209, DAL419, DAL1210.