Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A5124C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N426DZ · AIRBUS A-330-900 · operated by DELTA AIR LINES INC

Hex
A5124C
Octal
51211114
Decimal
10,818,124
Country
US
Tail
N426DZ
Type
A339
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
277
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S A5124C.

Country allocation

The ICAO 24-bit address A5124C 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
DAL157 - 15 2026-07-07
DAL215 Delta Air Lines 14 2026-06-09
DAL214 Delta Air Lines 12 2026-06-08
DAL273 - 11 2026-07-02
DAL156 - 10 2026-07-06
DAL272 - 8 2026-07-02
DAL124 Delta Air Lines 8 2026-07-23
DAL227 - 7 2026-06-29
DAL213 - 7 2026-07-09
DAL125 Delta Air Lines 7 2026-07-23
DAL62 Delta Air Lines 6 2026-07-23
DAL58 Delta Air Lines 6 2026-07-21
DAL226 - 6 2026-06-29
DAL212 - 6 2026-07-09
DAL184 - 6 2026-07-10
DAL145 - 6 2026-07-15
DAL59 Delta Air Lines 5 2026-07-22
DAL241 Delta Air Lines 5 2026-06-01
DAL222 Delta Air Lines 5 2026-05-31
DAL185 - 5 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL4 LHR → JFK Jul 26, 17:25 UTCJul 26, 23:00 UTC5h 35m
2026-07-26 DAL10 MSP → LHR Jul 26, 05:35 UTCJul 26, 12:25 UTC6h 51m
2026-07-26 DAL9965 ATL → DTW Jul 26, 01:35 UTCJul 26, 03:50 UTC2h 15m
2026-07-26 DAL9965 ATL → DTW Jul 26, 00:50 UTCJul 26, 03:43 UTC2h 53m
2026-07-25 DAL67 FCO → ATL Jul 25, 11:50 UTCJul 25, 14:40 UTC2h 50m
2026-07-25 DAL67 FCO → ATL Jul 25, 11:49 UTCJul 25, 21:52 UTC10h 3m
2026-07-24 DAL66 ATL → FCO Jul 24, 23:30 UTCJul 25, 08:35 UTC9h 5m
2026-07-24 DAL66 ATL → FCO Jul 24, 23:28 UTCJul 25, 08:30 UTC9h 2m
2026-07-24 DAL109 MAD → ATL Jul 24, 08:05 UTCJul 24, 16:35 UTC8h 30m
2026-07-24 DAL109 MAD → ATL Jul 24, 08:03 UTCJul 24, 16:30 UTC8h 27m
2026-07-23 DAL62 ATL → FCO Jul 23, 22:20 UTCJul 24, 05:00 UTC6h 40m
2026-07-23 DAL125 LIS → BOS Jul 23, 12:19 UTCJul 23, 18:44 UTC6h 25m
2026-07-23 DAL125 LIS → BOS Jul 23, 12:20 UTCJul 23, 13:10 UTC50m
2026-07-23 DAL124 BOS → LIS Jul 23, 03:40 UTCJul 23, 05:00 UTC1h 20m
2026-07-23 DAL124 BOS → LIS Jul 23, 03:40 UTCJul 23, 09:50 UTC6h 10m
2026-07-22 DAL59 LHR → BOS Jul 22, 15:00 UTCJul 22, 16:00 UTC1h 0m
2026-07-22 DAL59 LHR → BOS Jul 22, 10:20 UTCJul 22, 14:55 UTC4h 35m
2026-07-21 DAL58 BOS → LHR Jul 21, 23:25 UTCJul 22, 00:45 UTC1h 20m
2026-07-21 DAL58 BOS → LHR Jul 21, 23:20 UTCJul 22, 05:31 UTC6h 11m
2026-07-21 DAL257 AMS → BOS Jul 21, 13:10 UTCJul 21, 20:10 UTC7h 0m
2026-07-21 DAL236 TPA → AMS Jul 21, 01:25 UTCJul 21, 09:00 UTC7h 35m
2026-07-21 DAL236 TPA → AMS Jul 21, 01:22 UTCJul 21, 10:16 UTC8h 54m
2026-07-20 DAL237 KEF → DTW Jul 20, 13:10 UTCJul 20, 14:50 UTC1h 40m
2026-07-20 DAL237 KEF → DTW Jul 20, 13:09 UTCJul 20, 22:20 UTC9h 11m
2026-07-20 DAL236 TPA → AMS Jul 20, 01:15 UTCJul 20, 10:20 UTC9h 5m
2026-07-19 DAL237 KEF → DTW Jul 19, 13:20 UTCJul 19, 15:00 UTC1h 40m
2026-07-19 DAL237 KEF → DTW Jul 19, 13:19 UTCJul 19, 22:31 UTC9h 12m
2026-07-19 DAL144 SEA → AMS Jul 19, 00:55 UTCJul 19, 09:50 UTC8h 55m
2026-07-18 DAL43 - Jul 18, 10:50 UTCJul 18, 22:10 UTC11h 20m
2026-07-17 DAL42 SEA → FCO Jul 17, 21:39 UTCJul 18, 08:05 UTC10h 26m
2026-07-16 DAL81 - Jul 16, 14:50 UTCJul 16, 17:45 UTC2h 55m
2026-07-16 DAL81 CDG → SEA Jul 16, 14:49 UTCJul 17, 00:45 UTC9h 56m
2026-07-16 DAL80 SEA → CDG Jul 16, 02:30 UTCJul 16, 11:50 UTC9h 20m
2026-07-15 DAL145 - Jul 15, 14:40 UTCJul 15, 16:05 UTC1h 25m
2026-07-15 DAL145 AMS → SEA Jul 15, 14:35 UTCJul 16, 00:03 UTC9h 28m
2026-07-15 DAL145 AMS → SEA Jul 15, 14:35 UTCJul 16, 00:09 UTC9h 34m
2026-07-15 DAL164 MSP → AMS Jul 15, 04:35 UTCJul 15, 12:30 UTC7h 55m
2026-07-14 DAL299 - Jul 14, 13:05 UTCJul 14, 22:50 UTC9h 44m
2026-07-14 DAL299 FCO → MSP Jul 14, 13:03 UTCJul 14, 22:45 UTC9h 42m
2026-07-14 DAL298 MSP → FCO Jul 14, 01:36 UTCJul 14, 10:47 UTC9h 11m
2026-07-14 DAL298 - Jul 14, 01:35 UTCJul 14, 02:25 UTC50m
2026-07-13 DAL117 CPH → MSP Jul 13, 12:20 UTCJul 13, 20:45 UTC8h 25m
2026-07-13 DAL116 MSP → CPH Jul 13, 01:52 UTCJul 13, 09:53 UTC8h 1m
2026-07-13 DAL116 - Jul 13, 01:55 UTCJul 13, 02:45 UTC50m
2026-07-12 DAL9 LHR → MSP Jul 12, 12:05 UTCJul 12, 20:05 UTC8h 0m
2026-07-12 DAL3 JFK → LHR Jul 12, 03:24 UTCJul 12, 09:33 UTC6h 9m
2026-07-12 DAL3 - Jul 12, 03:25 UTCJul 12, 04:55 UTC1h 30m
2026-07-11 DAL939 LAX → JFK Jul 11, 19:15 UTCJul 12, 00:01 UTC4h 45m
2026-07-11 DAL713 - Jul 11, 11:25 UTCJul 11, 16:45 UTC5h 20m
2026-07-10 DAL185 MXP → JFK Jul 10, 13:21 UTCJul 10, 21:44 UTC8h 23m

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 N426DZ page for operator, model, and routing details .

Mode-S A5124C frequently asked

What is Mode-S code A5124C?
A5124C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N426DZ.
Where is Mode-S A5124C registered?
Mode-S code A5124C 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 A5124C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5124C, octal 51211114, decimal 10,818,124.
What flights does A5124C operate?
Mode-S A5124C has broadcast 20 distinct callsigns, including DAL157, DAL215, DAL214, DAL273, DAL156.