Apparatus

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sensors Mode-S transponder

ABAC50

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N851NW · AIRBUS A-330-200 · operated by DELTA AIR LINES INC

Hex
ABAC50
Octal
52726120
Decimal
11,250,768
Country
US
Tail
N851NW
Type
A332
No current signal · last broadcast Jul 26, 18:10 UTC
Flights observed
254
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 18:10 UTC

Last known position

Most recent position reported by Mode-S ABAC50.

Country allocation

The ICAO 24-bit address ABAC50 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
DAL86 - 17 2026-07-15
DAL258 - 15 2026-07-14
DAL87 Delta Air Lines 14 2026-07-26
DAL293 - 14 2026-07-14
DAL15 - 14 2026-07-07
DAL14 - 14 2026-07-07
DAL1 Delta Air Lines 14 2026-07-23
DAL51 Delta Air Lines 13 2026-07-23
DAL2 Delta Air Lines 13 2026-07-25
DAL106 Delta Air Lines 13 2026-07-25
DAL292 - 12 2026-07-13
DAL259 - 12 2026-07-13
DAL107 - 12 2026-07-15
DAL54 - 11 2026-07-02
DAL50 Delta Air Lines 11 2026-07-25
DAL22 - 9 2026-06-25
DAL55 - 7 2026-07-03
DAL23 - 6 2026-06-26
DAL279 - 4 2026-07-06
DAL278 - 4 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL87 FRA → DTW Jul 26, 09:30 UTCJul 26, 18:10 UTC8h 40m
2026-07-25 DAL106 JFK → FRA Jul 25, 22:46 UTCJul 26, 05:42 UTC6h 56m
2026-07-25 DAL106 JFK → FRA Jul 25, 22:50 UTCJul 26, 05:45 UTC6h 55m
2026-07-25 DAL2 LHR → JFK Jul 25, 12:05 UTCJul 25, 19:00 UTC6h 55m
2026-07-25 DAL50 SLC → LHR Jul 25, 01:25 UTCJul 25, 09:55 UTC8h 30m
2026-07-23 DAL51 LHR → SLC Jul 23, 10:20 UTCJul 23, 20:15 UTC9h 55m
2026-07-23 DAL1 JFK → LHR Jul 23, 00:35 UTCJul 23, 02:00 UTC1h 25m
2026-07-23 DAL1 JFK → LHR Jul 23, 00:32 UTCJul 23, 06:54 UTC6h 22m
2026-07-22 DAL2 LHR → JFK Jul 22, 12:35 UTCJul 22, 19:55 UTC7h 20m
2026-07-22 DAL2 LHR → JFK Jul 22, 12:32 UTCJul 22, 19:49 UTC7h 17m
2026-07-22 DAL50 SLC → LHR Jul 22, 00:45 UTCJul 22, 02:55 UTC2h 10m
2026-07-21 DAL51 LHR → SLC Jul 21, 10:15 UTCJul 21, 11:35 UTC1h 20m
2026-07-21 DAL51 LHR → SLC Jul 21, 10:10 UTCJul 21, 19:49 UTC9h 39m
2026-07-21 DAL51 LHR → SLC Jul 21, 10:10 UTCJul 21, 19:51 UTC9h 41m
2026-07-21 DAL1 JFK → LHR Jul 21, 00:45 UTCJul 21, 07:04 UTC6h 19m
2026-07-21 DAL1 JFK → LHR Jul 21, 00:50 UTCJul 21, 07:10 UTC6h 20m
2026-07-20 DAL2 - Jul 20, 14:00 UTCJul 20, 15:05 UTC1h 5m
2026-07-20 DAL2 LHR → JFK Jul 20, 13:55 UTCJul 20, 21:07 UTC7h 12m
2026-07-20 DAL1 JFK → LHR Jul 20, 05:10 UTCJul 20, 11:45 UTC6h 35m
2026-07-19 DAL2 LHR → JFK Jul 19, 11:15 UTCJul 19, 18:20 UTC7h 5m
2026-07-18 DAL50 SLC → LHR Jul 18, 23:55 UTCJul 19, 08:55 UTC9h 0m
2026-07-18 DAL51 LHR → SLC Jul 18, 11:21 UTCJul 18, 20:43 UTC9h 22m
2026-07-18 DAL51 LHR → SLC Jul 18, 11:25 UTCJul 18, 20:50 UTC9h 25m
2026-07-17 DAL50 SLC → LHR Jul 17, 23:37 UTCJul 18, 08:31 UTC8h 54m
2026-07-17 DAL50 - Jul 17, 23:39 UTCJul 18, 01:54 UTC2h 15m
2026-07-16 DAL51 - Jul 16, 10:10 UTCJul 16, 19:55 UTC9h 45m
2026-07-16 DAL51 LHR → SLC Jul 16, 10:09 UTCJul 16, 19:53 UTC9h 44m
2026-07-16 DAL1 JFK → LHR Jul 16, 01:20 UTCJul 16, 08:00 UTC6h 40m
2026-07-15 DAL107 FRA → JFK Jul 15, 10:15 UTCJul 15, 18:05 UTC7h 50m
2026-07-15 DAL86 - Jul 15, 00:15 UTCJul 15, 07:55 UTC7h 40m
2026-07-14 DAL293 DUB → DTW Jul 14, 09:21 UTCJul 14, 16:22 UTC7h 1m
2026-07-14 DAL293 DUB → DTW Jul 14, 09:25 UTCJul 14, 16:25 UTC7h 0m
2026-07-14 DAL258 - Jul 14, 02:25 UTCJul 14, 07:00 UTC4h 35m
2026-07-13 DAL258 MSP → DUB Jul 13, 23:45 UTCJul 14, 07:04 UTC7h 19m
2026-07-13 DAL258 - Jul 13, 23:45 UTCJul 14, 02:20 UTC2h 35m
2026-07-13 DAL259 DUB → MSP Jul 13, 11:20 UTCJul 13, 18:45 UTC7h 25m
2026-07-13 DAL292 - Jul 13, 02:15 UTCJul 13, 09:05 UTC6h 50m
2026-07-12 DAL87 FRA → DTW Jul 12, 09:30 UTCJul 12, 17:50 UTC8h 20m
2026-07-12 DAL106 JFK → FRA Jul 12, 00:03 UTCJul 12, 07:05 UTC7h 2m
2026-07-12 DAL106 - Jul 12, 00:05 UTCJul 12, 01:35 UTC1h 30m
2026-07-11 DAL107 FRA → JFK Jul 11, 10:21 UTCJul 11, 18:17 UTC7h 56m
2026-07-11 DAL107 FRA → JFK Jul 11, 10:21 UTCJul 11, 18:28 UTC8h 7m
2026-07-11 DAL107 - Jul 11, 10:20 UTCJul 11, 12:00 UTC1h 40m
2026-07-11 DAL86 - Jul 11, 00:05 UTCJul 11, 07:35 UTC7h 30m
2026-07-10 DAL293 DUB → DTW Jul 10, 09:15 UTCJul 10, 16:30 UTC7h 15m
2026-07-10 DAL258 MSP → DUB Jul 10, 00:21 UTCJul 10, 07:08 UTC6h 47m
2026-07-10 DAL258 - Jul 10, 00:25 UTCJul 10, 02:00 UTC1h 35m
2026-07-09 DAL259 DUB → MSP Jul 9, 11:22 UTCJul 9, 18:51 UTC7h 29m
2026-07-09 DAL259 - Jul 9, 11:25 UTCJul 9, 12:05 UTC40m
2026-07-09 DAL292 - Jul 9, 03:55 UTCJul 9, 08:40 UTC4h 45m

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 N851NW page for operator, model, and routing details .

Mode-S ABAC50 frequently asked

What is Mode-S code ABAC50?
ABAC50 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N851NW.
Where is Mode-S ABAC50 registered?
Mode-S code ABAC50 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 ABAC50 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABAC50, octal 52726120, decimal 11,250,768.
What flights does ABAC50 operate?
Mode-S ABAC50 has broadcast 20 distinct callsigns, including DAL86, DAL258, DAL87, DAL293, DAL15.