Apparatus

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sensors Mode-S transponder

A70F88

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N554NW · BOEING 757-200 · operated by DELTA AIR LINES INC

Hex
A70F88
Octal
51607610
Decimal
10,948,488
Country
US
Tail
N554NW
Type
B752
No current signal · last broadcast 3h ago
Flights observed
411
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A70F88.

Country allocation

The ICAO 24-bit address A70F88 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
DAL1831 - 14 2026-07-13
DAL391 Delta Air Lines 13 2026-06-10
DAL1830 - 13 2026-07-13
DAL549 Delta Air Lines 9 2026-06-30
DAL1946 Delta Air Lines 9 2026-04-26
DAL2345 Delta Air Lines 7 2026-06-12
DAL1462 Delta Air Lines 7 2026-05-15
DAL2881 - 6 2026-06-13
DAL1385 - 6 2026-06-26
DAL777 Delta Air Lines 5 2026-06-29
DAL631 Delta Air Lines 5 2026-05-01
DAL591 Delta Air Lines 5 2026-06-25
DAL2204 Delta Air Lines 5 2026-04-21
DAL2080 Delta Air Lines 5 2026-06-04
DAL1861 Delta Air Lines 5 2026-04-26
DAL1733 Delta Air Lines 5 2026-06-04
DAL1298 Delta Air Lines 5 2026-06-23
DAL1150 Delta Air Lines 5 2026-05-28
DAL813 - 4 2026-06-22
DAL630 Delta Air Lines 4 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DAL1280 ATL → MSP Jul 14, 00:51 UTCJul 14, 03:04 UTC2h 13m
2026-07-14 DAL1280 ATL → MSP Jul 14, 00:50 UTCJul 14, 03:05 UTC2h 15m
2026-07-13 DAL1831 - Jul 13, 20:00 UTCJul 13, 22:10 UTC2h 10m
2026-07-13 DAL1831 - Jul 13, 19:15 UTCJul 13, 19:20 UTC5m
2026-07-13 DAL1830 ATL → GUA Jul 13, 14:20 UTCJul 13, 17:15 UTC2h 55m
2026-07-13 DAL1830 ATL → GUA Jul 13, 14:19 UTCJul 13, 17:15 UTC2h 56m
2026-07-13 DAL1215 - Jul 13, 10:45 UTCJul 13, 12:05 UTC1h 20m
2026-07-13 DAL1229 ATL → FLL Jul 13, 04:50 UTCJul 13, 06:10 UTC1h 20m
2026-07-13 DAL1229 ATL → FLL Jul 13, 04:46 UTCJul 13, 06:04 UTC1h 18m
2026-07-13 DAL3132 MSY → ATL Jul 13, 02:05 UTCJul 13, 03:10 UTC1h 5m
2026-07-12 DAL3132 ATL → MSY Jul 12, 23:30 UTCJul 13, 00:40 UTC1h 10m
2026-07-12 DAL1048 - Jul 12, 20:15 UTCJul 12, 20:20 UTC5m
2026-07-12 DAL1048 MSP → ATL Jul 12, 18:01 UTCJul 12, 20:20 UTC2h 20m
2026-07-12 DAL1048 MSP → ATL Jul 12, 18:00 UTCJul 12, 19:58 UTC1h 58m
2026-07-11 DAL447 ANC → MSP Jul 11, 14:10 UTCJul 11, 19:10 UTC5h 0m
2026-07-11 DAL411 MSP → ANC Jul 11, 03:35 UTCJul 11, 08:45 UTC5h 10m
2026-07-10 DAL555 ANC → MSP Jul 10, 20:50 UTCJul 11, 01:45 UTC4h 55m
2026-07-10 DAL555 MSP → ANC Jul 10, 14:20 UTCJul 10, 19:30 UTC5h 10m
2026-07-09 DAL914 - Jul 9, 20:35 UTCJul 9, 23:30 UTC2h 55m
2026-07-09 DAL2102 - Jul 9, 15:45 UTCJul 9, 19:00 UTC3h 15m
2026-07-09 DAL2102 MSP → LAX Jul 9, 15:43 UTCJul 9, 18:56 UTC3h 13m
2026-07-06 DAL555 ANC → MSP Jul 6, 20:40 UTCJul 7, 01:35 UTC4h 55m
2026-07-06 DAL555 MSP → ANC Jul 6, 14:00 UTCJul 6, 19:25 UTC5h 25m
2026-07-06 DAL377 - Jul 6, 06:45 UTCJul 6, 11:35 UTC4h 50m
2026-07-05 DAL377 MSP → ANC Jul 5, 23:35 UTCJul 6, 04:45 UTC5h 10m
2026-07-05 DAL2263 TPA → MSP Jul 5, 12:05 UTCJul 5, 15:00 UTC2h 55m
2026-07-05 DAL1560 ATL → TPA Jul 5, 04:30 UTCJul 5, 05:30 UTC1h 0m
2026-07-05 DAL1560 ATL → TPA Jul 5, 04:27 UTCJul 5, 05:24 UTC57m
2026-07-04 DAL1794 ATL → ATL Jul 4, 15:50 UTCJul 5, 00:30 UTC8h 40m
2026-07-04 DAL965 - Jul 4, 11:35 UTCJul 4, 13:05 UTC1h 30m
2026-07-04 DAL965 DTW → ATL Jul 4, 11:34 UTCJul 4, 12:57 UTC1h 23m
2026-07-03 DAL778 LAS → DTW Jul 3, 22:50 UTCJul 4, 02:15 UTC3h 25m
2026-07-03 DAL778 LAS → DTW Jul 3, 22:48 UTCJul 4, 02:25 UTC3h 37m
2026-07-03 DAL807 JFK → LAS Jul 3, 15:45 UTCJul 3, 20:30 UTC4h 45m
2026-07-03 DAL807 JFK → LAS Jul 3, 15:42 UTCJul 3, 20:23 UTC4h 41m
2026-07-03 DAL2420 ATL → JFK Jul 3, 11:55 UTCJul 3, 13:45 UTC1h 50m
2026-07-03 DAL879 LAS → ATL Jul 3, 06:30 UTCJul 3, 09:55 UTC3h 25m
2026-07-03 DAL955 ATL → LAS Jul 3, 00:45 UTCJul 3, 04:25 UTC3h 40m
2026-07-02 DAL1831 - Jul 2, 20:00 UTCJul 2, 22:15 UTC2h 15m
2026-07-02 DAL1831 - Jul 2, 19:15 UTCJul 2, 19:20 UTC5m
2026-07-02 DAL1831 GUA → ATL Jul 2, 19:13 UTCJul 2, 22:13 UTC3h 0m
2026-07-02 DAL1830 ATL → GUA Jul 2, 14:35 UTCJul 2, 17:40 UTC3h 5m
2026-07-02 DAL2286 JFK → ATL Jul 2, 10:20 UTCJul 2, 12:10 UTC1h 50m
2026-07-02 DAL2286 JFK → ATL Jul 2, 10:15 UTCJul 2, 11:58 UTC1h 43m
2026-07-01 DAL624 - Jul 1, 20:45 UTCJul 2, 01:30 UTC4h 45m
2026-07-01 DAL625 JFK → MEX Jul 1, 13:58 UTCJul 1, 18:09 UTC4h 11m
2026-07-01 DAL625 - Jul 1, 14:00 UTCJul 1, 18:10 UTC4h 10m
2026-07-01 DAL498 LAS → JFK Jul 1, 06:45 UTCJul 1, 11:15 UTC4h 30m
2026-06-30 DAL549 ATL → LGA Jun 30, 18:05 UTCJun 30, 21:55 UTC3h 50m
2026-06-30 DAL1089 RSW → ATL Jun 30, 14:35 UTCJun 30, 15:50 UTC1h 15m

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 N554NW page for operator, model, and routing details .

Mode-S A70F88 frequently asked

What is Mode-S code A70F88?
A70F88 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N554NW.
Where is Mode-S A70F88 registered?
Mode-S code A70F88 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 A70F88 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A70F88, octal 51607610, decimal 10,948,488.
What flights does A70F88 operate?
Mode-S A70F88 has broadcast 20 distinct callsigns, including DAL1831, DAL391, DAL1830, DAL549, DAL1946.