Apparatus

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sensors Mode-S transponder

A7133F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N555NW · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
A7133F
Octal
51611477
Decimal
10,949,439
Country
US
Tail
N555NW
Type
B752
No current signal · last broadcast 8h ago
Flights observed
440
Distinct callsigns
20
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A7133F.

Country allocation

The ICAO 24-bit address A7133F 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
DAL777 Delta Air Lines 16 2026-06-27
DAL1089 Delta Air Lines 12 2026-05-17
DAL391 Delta Air Lines 10 2026-05-05
DAL602 - 9 2026-06-13
DAL492 Delta Air Lines 8 2026-06-09
DAL466 - 8 2026-06-28
DAL796 - 7 2026-06-23
DAL2881 - 7 2026-06-30
DAL2326 Delta Air Lines 7 2026-06-20
DAL1830 - 7 2026-06-22
DAL1167 Delta Air Lines 7 2026-05-01
DAL913 Delta Air Lines 6 2026-06-09
DAL757 - 6 2026-07-07
DAL748 Delta Air Lines 6 2026-07-06
DAL630 Delta Air Lines 6 2026-05-22
DAL348 - 6 2026-07-03
DAL2836 Delta Air Lines 6 2026-05-19
DAL2605 Delta Air Lines 6 2026-04-29
DAL1831 - 6 2026-06-22
DAL1153 Delta Air Lines 6 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 DAL430 LAS → BOS Jul 13, 18:00 UTCJul 13, 22:55 UTC4h 55m
2026-07-13 DAL607 JFK → LAS Jul 13, 11:15 UTCJul 13, 15:40 UTC4h 25m
2026-07-12 DAL624 - Jul 12, 20:50 UTCJul 13, 02:05 UTC5h 15m
2026-07-12 DAL625 JFK → MEX Jul 12, 14:05 UTCJul 12, 18:44 UTC4h 39m
2026-07-12 DAL625 - Jul 12, 14:05 UTCJul 12, 17:45 UTC3h 40m
2026-07-12 DAL498 LAS → JFK Jul 12, 07:20 UTCJul 12, 11:50 UTC4h 30m
2026-07-11 DAL807 JFK → LAS Jul 11, 15:45 UTCJul 11, 20:40 UTC4h 55m
2026-07-11 DAL2420 ATL → JFK Jul 11, 11:55 UTCJul 11, 13:35 UTC1h 40m
2026-07-11 DAL879 LAS → ATL Jul 11, 05:10 UTCJul 11, 08:45 UTC3h 35m
2026-07-10 DAL722 ATL → LAS Jul 10, 22:50 UTCJul 11, 02:25 UTC3h 35m
2026-07-10 DAL901 - Jul 10, 14:35 UTCJul 10, 17:50 UTC3h 15m
2026-07-09 DAL1135 - Jul 9, 21:20 UTCJul 10, 01:00 UTC3h 40m
2026-07-09 DAL1135 DTW → PHX Jul 9, 21:18 UTCJul 10, 00:57 UTC3h 39m
2026-07-09 DAL1031 ATL → DTW Jul 9, 18:05 UTCJul 9, 19:45 UTC1h 40m
2026-07-09 DAL918 - Jul 9, 13:00 UTCJul 9, 16:10 UTC3h 10m
2026-07-08 DAL836 ATL → PHX Jul 8, 22:15 UTCJul 9, 01:40 UTC3h 25m
2026-07-08 DAL1525 TPA → ATL Jul 8, 19:40 UTCJul 8, 20:45 UTC1h 5m
2026-07-08 DAL1525 ATL → TPA Jul 8, 17:15 UTCJul 8, 18:15 UTC1h 0m
2026-07-08 DAL2204 MCO → ATL Jul 8, 14:25 UTCJul 8, 15:35 UTC1h 10m
2026-07-08 DAL2204 MCO → ATL Jul 8, 14:24 UTCJul 8, 15:29 UTC1h 5m
2026-07-08 DAL2204 ATL → MCO Jul 8, 11:40 UTCJul 8, 12:45 UTC1h 5m
2026-07-07 DAL1101 ORF → ATL Jul 7, 21:20 UTCJul 7, 22:35 UTC1h 15m
2026-07-07 DAL1101 ATL → ORF Jul 7, 18:30 UTCJul 7, 19:40 UTC1h 10m
2026-07-07 DAL918 PHX → DTW Jul 7, 13:15 UTCJul 7, 16:30 UTC3h 15m
2026-07-07 DAL918 PHX → DTW Jul 7, 13:15 UTCJul 7, 16:32 UTC3h 17m
2026-07-07 DAL757 ATL → PHX Jul 7, 00:35 UTCJul 7, 03:55 UTC3h 20m
2026-07-06 DAL748 MSP → LAX Jul 6, 18:55 UTCJul 6, 22:25 UTC3h 30m
2026-07-06 DAL748 MSP → LAX Jul 6, 18:53 UTCJul 6, 22:21 UTC3h 28m
2026-07-06 DAL2262 ORD → LGA Jul 6, 14:30 UTCJul 6, 17:20 UTC2h 50m
2026-07-05 DAL2274 PHX → MSP Jul 5, 21:20 UTCJul 6, 00:00 UTC2h 40m
2026-07-05 DAL2274 MSP → PHX Jul 5, 17:05 UTCJul 5, 19:45 UTC2h 40m
2026-07-05 DAL1308 BOS → MSP Jul 5, 12:55 UTCJul 5, 15:35 UTC2h 40m
2026-07-05 DAL2614 MSP → BOS Jul 5, 02:30 UTCJul 5, 04:50 UTC2h 20m
2026-07-04 DAL2274 PHX → MSP Jul 4, 21:10 UTCJul 4, 23:40 UTC2h 30m
2026-07-04 DAL2274 MSP → PHX Jul 4, 16:40 UTCJul 4, 19:30 UTC2h 50m
2026-07-04 DAL1280 ATL → MSP Jul 4, 02:35 UTCJul 4, 04:45 UTC2h 10m
2026-07-03 DAL348 - Jul 3, 17:40 UTCJul 3, 21:00 UTC3h 20m
2026-07-03 DAL348 ATL → PHX Jul 3, 12:30 UTCJul 3, 15:55 UTC3h 25m
2026-07-02 DAL1894 ATL → ATL Jul 2, 14:15 UTCJul 2, 23:15 UTC9h 0m
2026-07-02 DAL1726 TPA → ATL Jul 2, 10:20 UTCJul 2, 11:20 UTC1h 0m
2026-07-02 DAL1560 ATL → TPA Jul 2, 03:15 UTCJul 2, 04:15 UTC1h 0m
2026-07-01 DAL406 ATL → ATL Jul 1, 15:10 UTCJul 2, 00:00 UTC8h 50m
2026-07-01 DAL1548 MCO → ATL Jul 1, 09:40 UTCJul 1, 10:40 UTC1h 0m
2026-06-30 DAL2881 ATL → MCO Jun 30, 23:55 UTCJul 1, 01:00 UTC1h 5m
2026-06-30 DAL348 PHX → ATL Jun 30, 17:35 UTCJun 30, 20:55 UTC3h 20m
2026-06-30 DAL348 ATL → PHX Jun 30, 12:15 UTCJun 30, 15:45 UTC3h 30m
2026-06-30 DAL929 PHX → ATL Jun 30, 07:15 UTCJun 30, 10:25 UTC3h 10m
2026-06-29 DAL757 ATL → PHX Jun 29, 23:39 UTCJun 30, 03:10 UTC3h 31m
2026-06-29 DAL757 ATL → PHX Jun 29, 23:39 UTCJun 30, 03:06 UTC3h 27m
2026-06-29 DAL793 JFK → ATL Jun 29, 13:30 UTCJun 29, 21:50 UTC8h 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 N555NW page for operator, model, and routing details .

Mode-S A7133F frequently asked

What is Mode-S code A7133F?
A7133F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N555NW.
Where is Mode-S A7133F registered?
Mode-S code A7133F 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 A7133F broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7133F, octal 51611477, decimal 10,949,439.
What flights does A7133F operate?
Mode-S A7133F has broadcast 20 distinct callsigns, including DAL777, DAL1089, DAL391, DAL602, DAL492.