Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 Jul 26, 21:25 UTC
Flights observed
468
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:25 UTC

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
DAL391 Delta Air Lines 15 2026-07-24
DAL1831 - 14 2026-07-13
DAL1830 - 13 2026-07-13
DAL549 Delta Air Lines 9 2026-06-30
DAL1946 Delta Air Lines 9 2026-04-26
DAL591 Delta Air Lines 7 2026-07-22
DAL555 - 7 2026-07-14
DAL2345 Delta Air Lines 7 2026-06-12
DAL1462 Delta Air Lines 7 2026-05-15
DAL2881 - 6 2026-06-13
DAL2188 Delta Air Lines 6 2026-07-20
DAL1385 - 6 2026-06-26
DAL1298 Delta Air Lines 6 2026-07-22
DAL777 Delta Air Lines 5 2026-06-29
DAL631 Delta Air Lines 5 2026-05-01
DAL421 Delta Air Lines 5 2026-07-22
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DAL348 PHX → ATL Jul 26, 18:05 UTCJul 26, 21:20 UTC3h 15m
2026-07-26 DAL348 PHX → ATL Jul 26, 12:30 UTCJul 26, 15:40 UTC3h 10m
2026-07-25 DAL1794 ATL → BDL Jul 25, 23:20 UTCJul 26, 02:50 UTC3h 30m
2026-07-25 DAL1794 ATL → BDL Jul 25, 23:25 UTCJul 26, 02:50 UTC3h 25m
2026-07-25 DAL1931 ATL → SJO Jul 25, 18:15 UTCJul 25, 21:50 UTC3h 35m
2026-07-25 DAL918 PHX → DTW Jul 25, 13:00 UTCJul 25, 16:25 UTC3h 25m
2026-07-24 DAL836 HNL → ATL Jul 24, 23:20 UTCJul 25, 02:30 UTC3h 10m
2026-07-24 DAL1525 SNA → SEA Jul 24, 20:38 UTCJul 24, 21:42 UTC1h 4m
2026-07-24 DAL1525 SNA → SEA Jul 24, 20:40 UTCJul 24, 21:45 UTC1h 5m
2026-07-24 DAL1525 SNA → SEA Jul 24, 17:20 UTCJul 24, 18:23 UTC1h 3m
2026-07-24 DAL1525 SNA → SEA Jul 24, 17:20 UTCJul 24, 18:00 UTC40m
2026-07-24 DAL1336 DTW → ATL Jul 24, 14:25 UTCJul 24, 15:45 UTC1h 20m
2026-07-24 DAL1336 DTW → ATL Jul 24, 14:24 UTCJul 24, 15:47 UTC1h 23m
2026-07-24 DAL1336 DTW → ATL Jul 24, 11:50 UTCJul 24, 13:00 UTC1h 10m
2026-07-24 DAL391 DFW → BOS Jul 24, 06:40 UTCJul 24, 10:25 UTC3h 45m
2026-07-24 DAL391 DFW → BOS Jul 24, 00:40 UTCJul 24, 04:45 UTC4h 5m
2026-07-23 DAL587 MEX → ATL Jul 23, 19:45 UTCJul 23, 22:35 UTC2h 50m
2026-07-23 DAL588 ATL → MEX Jul 23, 17:40 UTCJul 23, 17:55 UTC15m
2026-07-23 DAL588 ATL → MEX Jul 23, 14:45 UTCJul 23, 17:05 UTC2h 20m
2026-07-23 DAL588 ATL → MEX Jul 23, 14:43 UTCJul 23, 18:00 UTC3h 17m
2026-07-23 DAL2569 JAX → ATL Jul 23, 12:25 UTCJul 23, 13:10 UTC45m
2026-07-23 DAL2276 SLC → SFO Jul 23, 03:15 UTCJul 23, 04:00 UTC45m
2026-07-22 DAL591 STT → JFK Jul 22, 22:25 UTCJul 23, 01:50 UTC3h 25m
2026-07-22 DAL591 STT → JFK Jul 22, 22:23 UTCJul 23, 01:49 UTC3h 26m
2026-07-22 DAL421 DFW → LGA Jul 22, 17:30 UTCJul 22, 21:05 UTC3h 35m
2026-07-22 DAL421 DFW → LGA Jul 22, 17:15 UTCJul 22, 17:25 UTC10m
2026-07-22 DAL421 DFW → LGA Jul 22, 17:13 UTCJul 22, 20:56 UTC3h 43m
2026-07-22 DAL1298 ATL → DTW Jul 22, 14:25 UTCJul 22, 15:45 UTC1h 20m
2026-07-22 DAL1726 - Jul 22, 11:10 UTCJul 22, 11:20 UTC10m
2026-07-22 DAL1726 TPA → ATL Jul 22, 10:15 UTCJul 22, 11:17 UTC1h 2m
2026-07-22 DAL1591 RSW → MSP Jul 22, 02:10 UTCJul 22, 03:10 UTC1h 0m
2026-07-21 DAL1756 SJO → ATL Jul 21, 19:30 UTCJul 21, 23:00 UTC3h 30m
2026-07-21 DAL1756 SJO → ATL Jul 21, 19:29 UTCJul 21, 22:58 UTC3h 29m
2026-07-21 DAL1937 BOS → MSP Jul 21, 14:05 UTCJul 21, 17:30 UTC3h 25m
2026-07-21 DAL1548 STL → DTW Jul 21, 09:35 UTCJul 21, 10:35 UTC1h 0m
2026-07-21 DAL1162 ATL → MCO Jul 21, 03:45 UTCJul 21, 04:45 UTC1h 0m
2026-07-21 DAL1162 ATL → MCO Jul 21, 03:43 UTCJul 21, 04:44 UTC1h 1m
2026-07-21 DAL1425 ATL → TPA Jul 21, 01:10 UTCJul 21, 02:10 UTC1h 0m
2026-07-20 DAL1425 ATL → TPA Jul 20, 21:55 UTCJul 20, 23:00 UTC1h 5m
2026-07-20 DAL2188 DTW → ATL Jul 20, 17:40 UTCJul 20, 19:00 UTC1h 20m
2026-07-20 DAL2188 DTW → ATL Jul 20, 17:38 UTCJul 20, 19:01 UTC1h 23m
2026-07-20 DAL9979 ATL → DTW Jul 20, 14:25 UTCJul 20, 16:00 UTC1h 35m
2026-07-20 DAL9979 ATL → DTW Jul 20, 14:25 UTCJul 20, 15:57 UTC1h 32m
2026-07-19 DAL1521 - Jul 19, 02:00 UTCJul 19, 02:25 UTC25m
2026-07-18 DAL1521 - Jul 18, 19:40 UTCJul 18, 23:45 UTC4h 5m
2026-07-18 DAL2012 - Jul 18, 01:10 UTCJul 18, 05:00 UTC3h 51m
2026-07-18 DAL2012 ATL → SNA Jul 18, 01:08 UTCJul 18, 05:01 UTC3h 53m
2026-07-16 DAL1873 - Jul 16, 21:50 UTCJul 16, 23:25 UTC1h 35m
2026-07-16 DAL1894 - Jul 16, 14:10 UTCJul 16, 15:30 UTC1h 20m
2026-07-16 DAL1894 ATL → SXM Jul 16, 14:08 UTCJul 16, 17:42 UTC3h 34m

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 Jul 26, 21:25 UTC.
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 DAL391, DAL1831, DAL1830, DAL549, DAL1946.