Apparatus

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sensors Mode-S transponder

A04A4D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N118DY · AIRBUS A-321 · operated by DELTA AIR LINES INC

Hex
A04A4D
Octal
50045115
Decimal
10,504,781
Country
US
Tail
N118DY
Type
A321
Transponder active on ground
Flights observed
544
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A04A4D.

Country allocation

The ICAO 24-bit address A04A4D 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
DAL706 Delta Air Lines 9 2026-07-24
DAL341 - 8 2026-07-23
DAL581 - 7 2026-07-10
DAL2155 - 7 2026-07-20
DAL2121 Delta Air Lines 7 2026-07-21
DAL1181 - 7 2026-06-22
DAL999 Delta Air Lines 6 2026-06-01
DAL990 - 6 2026-07-05
DAL989 Delta Air Lines 6 2026-07-25
DAL700 Delta Air Lines 6 2026-06-02
DAL513 - 6 2026-07-05
DAL2191 Delta Air Lines 6 2026-07-20
DAL1538 Delta Air Lines 6 2026-04-23
DAL995 - 5 2026-07-07
DAL957 Delta Air Lines 5 2026-06-08
DAL582 - 5 2026-07-10
DAL530 - 5 2026-06-27
DAL433 - 5 2026-07-05
DAL2602 Delta Air Lines 5 2026-06-01
DAL2035 - 5 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL2349 ATL → CMH Jul 26, 19:10 UTCJul 26, 21:15 UTC2h 5m
2026-07-26 DAL467 JFK → LAS Jul 26, 16:00 UTCJul 26, 17:45 UTC1h 45m
2026-07-26 DAL1530 SEA → LAX Jul 26, 13:15 UTCJul 26, 14:10 UTC55m
2026-07-26 DAL1530 SEA → LAX Jul 26, 13:12 UTCJul 26, 14:07 UTC55m
2026-07-26 DAL3244 RSW → BOS Jul 26, 01:35 UTCJul 26, 02:30 UTC55m
2026-07-25 DAL1642 IAH → LGA Jul 25, 21:10 UTCJul 25, 22:15 UTC1h 5m
2026-07-25 DAL1642 IAH → LGA Jul 25, 21:05 UTCJul 25, 22:08 UTC1h 3m
2026-07-25 DAL1642 IAH → LGA Jul 25, 18:20 UTCJul 25, 19:25 UTC1h 5m
2026-07-25 DAL989 ATL → ONT Jul 25, 14:42 UTCJul 25, 16:26 UTC1h 44m
2026-07-25 DAL989 ATL → ONT Jul 25, 14:45 UTCJul 25, 16:30 UTC1h 45m
2026-07-25 DAL1487 TPA → BOS Jul 25, 11:15 UTCJul 25, 12:25 UTC1h 10m
2026-07-25 DAL1232 DEN → DTW Jul 25, 02:15 UTCJul 25, 03:45 UTC1h 30m
2026-07-24 DAL706 SAN → DTW Jul 24, 22:05 UTCJul 25, 00:40 UTC2h 35m
2026-07-24 DAL706 SAN → DTW Jul 24, 16:05 UTCJul 24, 19:00 UTC2h 55m
2026-07-24 DAL1505 SLC → SAT Jul 24, 13:20 UTCJul 24, 14:25 UTC1h 5m
2026-07-24 DAL1505 SLC → SAT Jul 24, 13:19 UTCJul 24, 14:24 UTC1h 5m
2026-07-24 DAL1562 ATL → CLT Jul 24, 03:50 UTCJul 24, 04:50 UTC1h 0m
2026-07-24 DAL1562 ATL → CLT Jul 24, 03:48 UTCJul 24, 04:46 UTC58m
2026-07-23 DAL715 ATL → SFO Jul 23, 21:50 UTCJul 24, 01:55 UTC4h 5m
2026-07-23 DAL326 ORD → ATL Jul 23, 16:05 UTCJul 23, 20:10 UTC4h 5m
2026-07-23 DAL341 - Jul 23, 12:00 UTCJul 23, 13:15 UTC1h 15m
2026-07-23 DAL341 DEN → ATL Jul 23, 12:00 UTCJul 23, 14:26 UTC2h 26m
2026-07-23 DAL1705 PHX → JFK Jul 23, 03:25 UTCJul 23, 05:20 UTC1h 55m
2026-07-22 DAL1098 BOS → MSP Jul 22, 22:30 UTCJul 23, 01:20 UTC2h 50m
2026-07-22 DAL1098 BOS → MSP Jul 22, 22:27 UTCJul 23, 01:15 UTC2h 48m
2026-07-22 DAL2558 SAN → SEA Jul 22, 20:35 UTCJul 22, 20:55 UTC20m
2026-07-22 DAL2558 SAN → SEA Jul 22, 18:05 UTCJul 22, 20:55 UTC2h 50m
2026-07-22 DAL2558 SAN → SEA Jul 22, 18:01 UTCJul 22, 20:18 UTC2h 17m
2026-07-22 DAL2178 ATL → EWR Jul 22, 13:20 UTCJul 22, 16:25 UTC3h 5m
2026-07-22 DAL2809 RSW → DTW Jul 22, 00:05 UTCJul 22, 03:45 UTC3h 40m
2026-07-21 DAL2121 OMA → MSP Jul 21, 19:15 UTCJul 21, 22:30 UTC3h 15m
2026-07-21 DAL2121 OMA → MSP Jul 21, 14:00 UTCJul 21, 17:20 UTC3h 20m
2026-07-20 DAL2191 JFK → SLC Jul 20, 22:40 UTCJul 21, 02:05 UTC3h 24m
2026-07-20 DAL2155 - Jul 20, 17:10 UTCJul 20, 21:15 UTC4h 5m
2026-07-20 DAL2155 DTW → SAN Jul 20, 17:08 UTCJul 20, 21:13 UTC4h 5m
2026-07-20 DAL1078 LGA → DTW Jul 20, 14:15 UTCJul 20, 15:35 UTC1h 20m
2026-07-20 DAL404 ATL → LGA Jul 20, 10:20 UTCJul 20, 12:00 UTC1h 40m
2026-07-20 DAL1206 - Jul 20, 03:15 UTCJul 20, 04:45 UTC1h 30m
2026-07-20 DAL1206 MKE → ATL Jul 20, 03:14 UTCJul 20, 04:38 UTC1h 24m
2026-07-20 DAL1206 ATL → MKE Jul 20, 00:10 UTCJul 20, 01:50 UTC1h 40m
2026-07-19 DAL2235 SJC → SLC Jul 19, 22:00 UTCJul 19, 22:35 UTC35m
2026-07-19 DAL2235 SJC → SLC Jul 19, 16:00 UTCJul 19, 19:45 UTC3h 45m
2026-07-19 DAL2235 SJC → SLC Jul 19, 11:50 UTCJul 19, 14:20 UTC2h 30m
2026-07-19 DAL819 ATL → LGA Jul 19, 05:55 UTCJul 19, 09:45 UTC3h 50m
2026-07-18 DAL2125 MSP → SAN Jul 18, 19:55 UTCJul 18, 23:05 UTC3h 10m
2026-07-18 DAL2178 ATL → EWR Jul 18, 13:20 UTCJul 18, 16:25 UTC3h 5m
2026-07-18 DAL2809 MSP → SFO Jul 18, 01:05 UTCJul 18, 04:40 UTC3h 36m
2026-07-17 DAL2121 OMA → MSP Jul 17, 19:17 UTCJul 17, 22:36 UTC3h 19m
2026-07-17 DAL2121 OMA → MSP Jul 17, 19:20 UTCJul 17, 22:29 UTC3h 10m
2026-07-17 DAL2121 OMA → MSP Jul 17, 14:00 UTCJul 17, 17:05 UTC3h 5m

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 N118DY page for operator, model, and routing details .

Mode-S A04A4D frequently asked

What is Mode-S code A04A4D?
A04A4D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N118DY.
Where is Mode-S A04A4D registered?
Mode-S code A04A4D 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 A04A4D broadcasting right now?
Mode-S A04A4D 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 A04A4D, octal 50045115, decimal 10,504,781.
What flights does A04A4D operate?
Mode-S A04A4D has broadcast 20 distinct callsigns, including DAL706, DAL341, DAL581, DAL2155, DAL2121.