Apparatus

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sensors Mode-S transponder

AB2855

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N818NW · AIRBUS A-330-300 · operated by DELTA AIR LINES INC

Hex
AB2855
Octal
52624125
Decimal
11,216,981
Country
US
Tail
N818NW
Type
A333
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
290
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S AB2855.

Country allocation

The ICAO 24-bit address AB2855 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
DAL185 Delta Air Lines 11 2026-06-17
DAL72 Delta Air Lines 10 2026-07-26
DAL184 - 10 2026-06-17
DAL104 Delta Air Lines 9 2026-07-26
DAL128 Delta Air Lines 8 2026-06-07
DAL74 - 7 2026-07-01
DAL113 - 7 2026-07-17
DAL105 Delta Air Lines 7 2026-07-24
DAL231 Delta Air Lines 6 2026-06-07
DAL177 - 6 2026-07-03
DAL176 - 6 2026-07-03
DAL75 - 5 2026-07-02
DAL47 - 5 2026-07-21
DAL46 Delta Air Lines 5 2026-07-21
DAL259 Delta Air Lines 5 2026-04-14
DAL258 Delta Air Lines 5 2026-04-14
DAL230 Delta Air Lines 5 2026-06-07
DAL229 - 5 2026-07-15
DAL207 - 5 2026-07-12
DAL206 - 5 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL72 ATL → AMS Jul 26, 21:10 UTCJul 26, 21:15 UTC5m
2026-07-26 DAL104 GRU → ATL Jul 26, 02:20 UTCJul 26, 03:00 UTC40m
2026-07-26 DAL104 GRU → ATL Jul 26, 02:16 UTCJul 26, 11:16 UTC9h 0m
2026-07-24 DAL105 ATL → GRU Jul 24, 23:40 UTCJul 25, 08:55 UTC9h 15m
2026-07-24 DAL105 ATL → GRU Jul 24, 23:37 UTCJul 25, 08:36 UTC8h 59m
2026-07-24 DAL175 MXP → ATL Jul 24, 10:10 UTCJul 24, 19:45 UTC9h 35m
2026-07-23 DAL174 ATL → MXP Jul 23, 22:40 UTCJul 24, 07:15 UTC8h 35m
2026-07-23 DAL150 LIM → ATL Jul 23, 06:15 UTCJul 23, 12:15 UTC6h 0m
2026-07-23 DAL150 LIM → ATL Jul 23, 05:56 UTCJul 23, 12:19 UTC6h 23m
2026-07-22 DAL151 ATL → LIM Jul 22, 21:08 UTCJul 23, 03:21 UTC6h 13m
2026-07-22 DAL151 ATL → LIM Jul 22, 21:10 UTCJul 22, 22:40 UTC1h 30m
2026-07-22 DAL73 AMS → ATL Jul 22, 11:10 UTCJul 22, 11:30 UTC20m
2026-07-22 DAL73 AMS → ATL Jul 22, 08:58 UTCJul 22, 17:52 UTC8h 54m
2026-07-21 DAL46 JFK → AMS Jul 21, 22:40 UTCJul 22, 05:22 UTC6h 42m
2026-07-21 DAL46 JFK → AMS Jul 21, 22:35 UTCJul 22, 00:10 UTC1h 35m
2026-07-21 DAL47 AMS → JFK Jul 21, 08:30 UTCJul 21, 16:15 UTC7h 45m
2026-07-20 DAL72 ATL → AMS Jul 20, 21:15 UTCJul 21, 05:20 UTC8h 5m
2026-07-20 DAL104 GRU → ATL Jul 20, 02:15 UTCJul 20, 02:55 UTC40m
2026-07-20 DAL104 GRU → ATL Jul 20, 02:11 UTCJul 20, 11:00 UTC8h 49m
2026-07-18 DAL105 ATL → GRU Jul 18, 23:15 UTCJul 19, 08:20 UTC9h 5m
2026-07-18 DAL195 BCN → ATL Jul 18, 10:00 UTCJul 18, 19:15 UTC9h 15m
2026-07-18 DAL250 BOS → BCN Jul 18, 00:39 UTCJul 18, 07:25 UTC6h 46m
2026-07-17 DAL113 - Jul 17, 11:50 UTCJul 17, 13:15 UTC1h 25m
2026-07-17 DAL113 FCO → BOS Jul 17, 11:48 UTCJul 17, 20:09 UTC8h 21m
2026-07-17 DAL206 - Jul 17, 00:30 UTCJul 17, 08:59 UTC8h 30m
2026-07-16 DAL23 - Jul 16, 07:10 UTCJul 16, 09:30 UTC2h 20m
2026-07-16 DAL23 MUC → DTW Jul 16, 07:09 UTCJul 16, 15:47 UTC8h 38m
2026-07-15 DAL22 - Jul 15, 20:50 UTCJul 16, 04:55 UTC8h 5m
2026-07-15 DAL22 DTW → MUC Jul 15, 20:48 UTCJul 16, 04:55 UTC8h 7m
2026-07-15 DAL229 - Jul 15, 09:05 UTCJul 15, 10:45 UTC1h 40m
2026-07-15 DAL229 CDG → DTW Jul 15, 09:02 UTCJul 15, 17:04 UTC8h 2m
2026-07-14 DAL152 MSP → CDG Jul 14, 21:40 UTCJul 15, 05:35 UTC7h 54m
2026-07-14 DAL153 - Jul 14, 09:30 UTCJul 14, 17:45 UTC8h 15m
2026-07-13 DAL228 - Jul 13, 22:55 UTCJul 14, 01:15 UTC2h 20m
2026-07-13 DAL228 DTW → CDG Jul 13, 22:50 UTCJul 14, 06:29 UTC7h 39m
2026-07-13 DAL23 MUC → DTW Jul 13, 07:10 UTCJul 13, 15:45 UTC8h 35m
2026-07-12 DAL22 - Jul 12, 20:45 UTCJul 13, 04:55 UTC8h 10m
2026-07-12 DAL22 DTW → MUC Jul 12, 20:43 UTCJul 13, 04:58 UTC8h 15m
2026-07-12 DAL207 - Jul 12, 07:10 UTCJul 12, 09:15 UTC2h 5m
2026-07-12 DAL207 FCO → DTW Jul 12, 07:09 UTCJul 12, 16:30 UTC9h 21m
2026-07-11 DAL112 BOS → FCO Jul 11, 21:15 UTCJul 12, 04:40 UTC7h 25m
2026-07-11 DAL277 MXP → BOS Jul 11, 10:11 UTCJul 11, 18:22 UTC8h 11m
2026-07-11 DAL277 MXP → BOS Jul 11, 10:10 UTCJul 11, 18:20 UTC8h 10m
2026-07-11 DAL276 - Jul 11, 00:10 UTCJul 11, 07:10 UTC7h 0m
2026-07-10 DAL251 - Jul 10, 13:40 UTCJul 10, 15:15 UTC1h 35m
2026-07-10 DAL251 BCN → BOS Jul 10, 13:40 UTCJul 10, 21:17 UTC7h 37m
2026-07-10 DAL251 BCN → BOS Jul 10, 13:40 UTCJul 10, 21:09 UTC7h 29m
2026-07-10 DAL194 - Jul 10, 02:25 UTCJul 10, 04:25 UTC2h 0m
2026-07-10 DAL194 ATL → BCN Jul 10, 02:20 UTCJul 10, 10:52 UTC8h 32m
2026-07-09 DAL67 - Jul 9, 12:05 UTCJul 9, 22:25 UTC10h 20m

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 N818NW page for operator, model, and routing details .

Mode-S AB2855 frequently asked

What is Mode-S code AB2855?
AB2855 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N818NW.
Where is Mode-S AB2855 registered?
Mode-S code AB2855 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 AB2855 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB2855, octal 52624125, decimal 11,216,981.
What flights does AB2855 operate?
Mode-S AB2855 has broadcast 20 distinct callsigns, including DAL185, DAL72, DAL184, DAL104, DAL128.