Apparatus

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sensors Mode-S transponder

AB15C2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N813NW · AIRBUS A-330-300 · operated by DELTA AIR LINES INC

Hex
AB15C2
Octal
52612702
Decimal
11,212,226
Country
US
Tail
N813NW
Type
A333
No current signal · last broadcast 1h ago
Flights observed
228
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AB15C2.

Country allocation

The ICAO 24-bit address AB15C2 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
DAL313 - 23 2026-07-18
DAL312 - 22 2026-07-12
DAL837 - 20 2026-07-17
DAL309 - 19 2026-07-17
DAL85 - 9 2026-06-27
DAL84 - 8 2026-06-27
DAL75 - 7 2026-07-04
DAL175 - 7 2026-07-03
DAL127 Delta Air Lines 6 2026-05-27
DAL126 Delta Air Lines 6 2026-05-27
DAL105 - 6 2026-07-14
DAL9936 Delta Air Lines 5 2026-04-16
DAL174 - 5 2026-07-02
DAL777 Delta Air Lines 4 2026-05-14
DAL74 - 4 2026-07-04
DAL215 - 4 2026-06-20
DAL193 - 4 2026-06-14
DAL177 - 4 2026-07-05
DAL176 - 4 2026-07-05
DAL162 - 4 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 DAL313 BOS → LAX Jul 18, 06:40 UTCJul 18, 10:05 UTC3h 25m
2026-07-18 DAL313 - Jul 18, 02:55 UTCJul 18, 03:15 UTC20m
2026-07-17 DAL837 - Jul 17, 23:30 UTCJul 17, 23:45 UTC15m
2026-07-17 DAL837 - Jul 17, 14:39 UTCJul 17, 19:15 UTC4h 35m
2026-07-17 DAL309 - Jul 17, 05:15 UTCJul 17, 10:00 UTC4h 45m
2026-07-17 DAL309 - Jul 17, 01:29 UTCJul 17, 01:45 UTC15m
2026-07-16 DAL837 - Jul 16, 22:55 UTCJul 16, 23:10 UTC15m
2026-07-16 DAL837 - Jul 16, 14:15 UTCJul 16, 18:44 UTC4h 30m
2026-07-16 DAL104 - Jul 16, 02:20 UTCJul 16, 11:30 UTC9h 10m
2026-07-14 DAL105 - Jul 14, 23:10 UTCJul 15, 08:15 UTC9h 5m
2026-07-14 DAL105 ATL → GRU Jul 14, 23:07 UTCJul 15, 07:59 UTC8h 52m
2026-07-14 DAL150 - Jul 14, 06:10 UTCJul 14, 12:15 UTC6h 5m
2026-07-13 DAL151 - Jul 13, 21:20 UTCJul 14, 03:20 UTC6h 0m
2026-07-13 DAL309 - Jul 13, 05:40 UTCJul 13, 09:45 UTC4h 5m
2026-07-13 DAL309 - Jul 13, 01:25 UTCJul 13, 01:45 UTC20m
2026-07-12 DAL312 - Jul 12, 22:55 UTCJul 12, 23:15 UTC20m
2026-07-12 DAL312 - Jul 12, 15:25 UTCJul 12, 19:01 UTC3h 35m
2026-07-12 DAL313 - Jul 12, 06:45 UTCJul 12, 09:55 UTC3h 10m
2026-07-12 DAL313 - Jul 12, 02:35 UTCJul 12, 02:55 UTC20m
2026-07-11 DAL312 - Jul 11, 23:10 UTCJul 11, 23:25 UTC15m
2026-07-11 DAL312 - Jul 11, 15:20 UTCJul 11, 19:05 UTC3h 45m
2026-07-11 DAL313 - Jul 11, 04:50 UTCJul 11, 11:55 UTC7h 5m
2026-07-11 DAL312 - Jul 11, 02:55 UTCJul 11, 03:05 UTC10m
2026-07-10 DAL312 - Jul 10, 19:05 UTCJul 10, 22:40 UTC3h 35m
2026-07-10 DAL313 - Jul 10, 06:40 UTCJul 10, 10:00 UTC3h 20m
2026-07-10 DAL313 - Jul 10, 02:35 UTCJul 10, 02:45 UTC10m
2026-07-10 DAL313 HNL → MSP Jul 10, 02:34 UTCJul 10, 09:49 UTC7h 15m
2026-07-09 DAL837 - Jul 9, 14:15 UTCJul 9, 23:15 UTC9h 0m
2026-07-09 DAL837 ATL → HNL Jul 9, 14:10 UTCJul 9, 23:04 UTC8h 54m
2026-07-09 DAL309 - Jul 9, 05:55 UTCJul 9, 10:15 UTC4h 20m
2026-07-09 DAL309 - Jul 9, 02:00 UTCJul 9, 02:20 UTC20m
2026-07-08 DAL312 - Jul 8, 23:20 UTCJul 8, 23:35 UTC15m
2026-07-08 DAL312 - Jul 8, 15:45 UTCJul 8, 19:20 UTC3h 35m
2026-07-08 DAL313 - Jul 8, 06:40 UTCJul 8, 09:55 UTC3h 15m
2026-07-08 DAL313 - Jul 8, 02:35 UTCJul 8, 02:55 UTC20m
2026-07-07 DAL837 ATL → HNL Jul 7, 14:07 UTCJul 7, 22:48 UTC8h 41m
2026-07-07 DAL837 - Jul 7, 14:10 UTCJul 7, 18:50 UTC4h 40m
2026-07-07 DAL9976 - Jul 7, 03:15 UTCJul 7, 04:45 UTC1h 30m
2026-07-06 DAL9887 DUB → DTW Jul 6, 16:35 UTCJul 6, 23:45 UTC7h 10m
2026-07-06 DAL292 KIX → GUM Jul 6, 02:45 UTCJul 6, 09:00 UTC6h 15m
2026-07-05 DAL9970 ATL → DTW Jul 5, 22:02 UTCJul 5, 23:22 UTC1h 20m
2026-07-05 DAL9970 ATL → DTW Jul 5, 22:05 UTCJul 5, 23:25 UTC1h 20m
2026-07-05 DAL177 DUB → ATL Jul 5, 11:10 UTCJul 5, 19:15 UTC8h 5m
2026-07-05 DAL176 ATL → DUB Jul 5, 00:50 UTCJul 5, 08:00 UTC7h 10m
2026-07-04 DAL75 AMS → ATL Jul 4, 11:40 UTCJul 4, 21:05 UTC9h 25m
2026-07-04 DAL74 - Jul 4, 00:10 UTCJul 4, 08:00 UTC7h 50m
2026-07-03 DAL175 MXP → ATL Jul 3, 10:05 UTCJul 3, 20:00 UTC9h 55m
2026-07-02 DAL174 ATL → MXP Jul 2, 23:20 UTCJul 3, 08:00 UTC8h 40m
2026-07-02 DAL177 DUB → ATL Jul 2, 10:10 UTCJul 2, 18:30 UTC8h 20m
2026-07-02 DAL176 ATL → DUB Jul 2, 00:15 UTCJul 2, 07:25 UTC7h 10m

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 N813NW page for operator, model, and routing details .

Mode-S AB15C2 frequently asked

What is Mode-S code AB15C2?
AB15C2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N813NW.
Where is Mode-S AB15C2 registered?
Mode-S code AB15C2 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 AB15C2 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB15C2, octal 52612702, decimal 11,212,226.
What flights does AB15C2 operate?
Mode-S AB15C2 has broadcast 20 distinct callsigns, including DAL313, DAL312, DAL837, DAL309, DAL85.