Apparatus

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sensors Mode-S transponder

A4CABA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N408DX · AIRBUS A-330-900 · operated by BANK OF UTAH TRUSTEE

Hex
A4CABA
Octal
51145272
Decimal
10,799,802
Country
US
Tail
N408DX
Type
A339
Broadcasting now · callsign DAL132 · 40,000 ft
Flights observed
271
Distinct callsigns
20
Country
US
Last broadcast
17m ago

Current position

A4CABA is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A4CABA 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
DAL57 Delta Air Lines 11 2026-05-22
DAL225 Delta Air Lines 11 2026-06-04
DAL133 Delta Air Lines 10 2026-06-08
DAL132 - 9 2026-07-14
DAL58 - 8 2026-07-13
DAL256 Delta Air Lines 8 2026-06-07
DAL220 Delta Air Lines 8 2026-05-22
DAL59 - 7 2026-07-09
DAL21 - 7 2026-07-03
DAL17 - 7 2026-07-14
DAL240 - 6 2026-07-09
DAL20 Delta Air Lines 6 2026-07-03
DAL164 - 6 2026-06-29
DAL16 - 6 2026-07-08
DAL145 - 6 2026-06-29
DAL9 - 5 2026-06-19
DAL81 Delta Air Lines 5 2026-06-30
DAL80 - 5 2026-06-30
DAL67 Delta Air Lines 5 2026-07-06
DAL257 Delta Air Lines 5 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL132 - Jul 14, 20:50 UTCJul 14, 22:30 UTC1h 40m
2026-07-14 DAL132 DTW → AMS Jul 14, 20:45 UTCJul 15, 04:09 UTC7h 24m
2026-07-14 DAL17 - Jul 14, 10:05 UTCJul 14, 17:35 UTC7h 30m
2026-07-14 DAL17 LHR → DTW Jul 14, 10:04 UTCJul 14, 17:33 UTC7h 29m
2026-07-13 DAL58 BOS → LHR Jul 13, 23:22 UTCJul 14, 05:30 UTC6h 8m
2026-07-13 DAL58 - Jul 13, 23:25 UTCJul 14, 04:30 UTC5h 5m
2026-07-13 DAL241 ATH → BOS Jul 13, 10:29 UTCJul 13, 20:09 UTC9h 40m
2026-07-13 DAL241 - Jul 13, 10:30 UTCJul 13, 14:30 UTC4h 0m
2026-07-12 DAL222 ATL → ATH Jul 12, 21:35 UTCJul 13, 07:55 UTC10h 20m
2026-07-12 DAL222 ATL → ATH Jul 12, 21:33 UTCJul 13, 07:51 UTC10h 18m
2026-07-12 DAL15 FRA → ATL Jul 12, 09:13 UTCJul 12, 18:18 UTC9h 5m
2026-07-12 DAL15 FRA → ATL Jul 12, 09:15 UTCJul 12, 18:20 UTC9h 5m
2026-07-11 DAL14 ATL → FRA Jul 11, 22:40 UTCJul 12, 06:55 UTC8h 15m
2026-07-11 DAL177 DUB → ATL Jul 11, 10:56 UTCJul 11, 20:02 UTC9h 6m
2026-07-11 DAL177 DUB → ATL Jul 11, 11:00 UTCJul 11, 20:05 UTC9h 5m
2026-07-11 DAL176 - Jul 11, 01:20 UTCJul 11, 08:20 UTC7h 0m
2026-07-10 DAL223 ATH → ATL Jul 10, 07:05 UTCJul 10, 18:45 UTC11h 40m
2026-07-09 DAL240 - Jul 9, 19:40 UTCJul 9, 20:30 UTC50m
2026-07-09 DAL240 BOS → ATH Jul 9, 19:40 UTCJul 10, 04:09 UTC8h 29m
2026-07-09 DAL59 LHR → BOS Jul 9, 09:00 UTCJul 9, 15:40 UTC6h 40m
2026-07-09 DAL59 LHR → BOS Jul 9, 08:55 UTCJul 9, 15:43 UTC6h 48m
2026-07-08 DAL16 - Jul 8, 23:25 UTCJul 9, 06:25 UTC7h 0m
2026-07-08 DAL17 LHR → DTW Jul 8, 10:25 UTCJul 8, 18:00 UTC7h 35m
2026-07-08 DAL17 LHR → DTW Jul 8, 10:23 UTCJul 8, 17:56 UTC7h 33m
2026-07-07 DAL58 - Jul 7, 23:55 UTCJul 8, 06:15 UTC6h 20m
2026-07-07 DAL63 - Jul 7, 13:40 UTCJul 7, 20:55 UTC7h 15m
2026-07-07 DAL108 ATL → MAD Jul 7, 02:40 UTCJul 7, 10:50 UTC8h 10m
2026-07-06 DAL67 FCO → ATL Jul 6, 13:40 UTCJul 6, 16:35 UTC2h 55m
2026-07-06 DAL67 FCO → ATL Jul 6, 13:38 UTCJul 6, 23:52 UTC10h 14m
2026-07-06 DAL42 - Jul 6, 01:00 UTCJul 6, 11:30 UTC10h 30m
2026-07-05 DAL249 TLV → ATL Jul 5, 11:50 UTCJul 5, 22:55 UTC11h 5m
2026-07-04 DAL248 ATL → TLV Jul 4, 22:37 UTCJul 5, 08:36 UTC9h 59m
2026-07-04 DAL248 ATL → TLV Jul 4, 22:40 UTCJul 5, 08:40 UTC10h 0m
2026-07-03 DAL21 - Jul 3, 17:05 UTCJul 4, 02:35 UTC9h 30m
2026-07-03 DAL20 SEA → LHR Jul 3, 05:15 UTCJul 3, 14:15 UTC9h 0m
2026-07-03 DAL20 SEA → LHR Jul 3, 05:12 UTCJul 3, 14:04 UTC8h 52m
2026-07-02 DAL21 - Jul 2, 17:00 UTCJul 2, 23:35 UTC6h 35m
2026-07-02 DAL21 LHR → SEA Jul 2, 16:57 UTCJul 3, 02:19 UTC9h 22m
2026-07-02 DAL20 SEA → LHR Jul 2, 05:05 UTCJul 2, 14:00 UTC8h 55m
2026-07-01 DAL21 - Jul 1, 16:55 UTCJul 1, 18:05 UTC1h 10m
2026-07-01 DAL21 LHR → SEA Jul 1, 16:54 UTCJul 2, 02:08 UTC9h 14m
2026-07-01 DAL21 LHR → SEA Jul 1, 16:54 UTCJul 2, 02:13 UTC9h 19m
2026-07-01 DAL20 SEA → LHR Jul 1, 05:20 UTCJul 1, 14:30 UTC9h 10m
2026-07-01 DAL20 SEA → LHR Jul 1, 05:19 UTCJul 1, 14:21 UTC9h 2m
2026-06-30 DAL81 CDG → SEA Jun 30, 15:55 UTCJul 1, 01:25 UTC9h 30m
2026-06-30 DAL81 CDG → SEA Jun 30, 15:51 UTCJul 1, 01:25 UTC9h 34m
2026-06-30 DAL80 - Jun 30, 02:10 UTCJun 30, 02:30 UTC20m
2026-06-30 DAL80 SEA → CDG Jun 30, 02:07 UTCJun 30, 11:19 UTC9h 12m
2026-06-29 DAL145 AMS → SEA Jun 29, 13:34 UTCJun 29, 22:39 UTC9h 5m
2026-06-29 DAL145 AMS → SEA Jun 29, 13:33 UTCJun 29, 22:32 UTC8h 59m

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 N408DX page for operator, model, and routing details .

Mode-S A4CABA frequently asked

What is Mode-S code A4CABA?
A4CABA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N408DX.
Where is Mode-S A4CABA registered?
Mode-S code A4CABA 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 A4CABA broadcasting right now?
Yes. Mode-S A4CABA is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4CABA, octal 51145272, decimal 10,799,802.
What flights does A4CABA operate?
Mode-S A4CABA has broadcast 20 distinct callsigns, including DAL57, DAL225, DAL133, DAL132, DAL58.