Apparatus

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sensors Mode-S transponder

A3813B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N325DN · AIRBUS A-321 · operated by BANK OF UTAH TRUSTEE

Hex
A3813B
Octal
50700473
Decimal
10,715,451
Country
US
Tail
N325DN
Type
A321
Broadcasting now · callsign DAL2011 · 28,000 ft
Flights observed
536
Distinct callsigns
20
Country
US
Last broadcast
Jul 23, 23:25 UTC

Current position

A3813B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A3813B 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
DAL838 - 10 2026-06-18
DAL1881 Delta Air Lines 10 2026-07-23
DAL1878 Delta Air Lines 10 2026-07-23
DAL2487 Delta Air Lines 9 2026-07-05
DAL2871 - 8 2026-07-05
DAL2720 Delta Air Lines 8 2026-05-06
DAL2489 Delta Air Lines 8 2026-07-05
DAL2397 Delta Air Lines 8 2026-06-05
DAL2279 Delta Air Lines 8 2026-05-31
DAL1330 - 8 2026-07-05
DAL1311 Delta Air Lines 7 2026-05-03
DAL641 Delta Air Lines 6 2026-06-10
DAL2353 - 6 2026-07-09
DAL2131 - 6 2026-07-15
DAL2035 Delta Air Lines 6 2026-06-10
DAL1341 - 6 2026-07-14
DAL1315 Delta Air Lines 6 2026-06-13
DAL1148 Delta Air Lines 6 2026-05-22
DAL852 Delta Air Lines 5 2026-04-29
DAL665 - 5 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 DAL1878 CUN → MSP Jul 23, 19:25 UTCJul 23, 23:20 UTC3h 55m
2026-07-23 DAL1881 MSP → CUN Jul 23, 14:10 UTCJul 23, 17:35 UTC3h 25m
2026-07-22 DAL1878 CUN → MSP Jul 22, 19:35 UTCJul 22, 23:25 UTC3h 50m
2026-07-22 DAL1881 MSP → CUN Jul 22, 14:10 UTCJul 22, 17:50 UTC3h 40m
2026-07-21 DAL1878 CUN → MSP Jul 21, 19:55 UTCJul 21, 23:40 UTC3h 45m
2026-07-21 DAL598 ATL → CUN Jul 21, 16:00 UTCJul 21, 18:20 UTC2h 20m
2026-07-21 DAL2643 YUL → ATL Jul 21, 11:25 UTCJul 21, 13:35 UTC2h 10m
2026-07-21 DAL2416 ATL → YUL Jul 21, 01:35 UTCJul 21, 03:40 UTC2h 5m
2026-07-20 DAL1836 PUJ → ATL Jul 20, 15:20 UTCJul 20, 23:25 UTC8h 5m
2026-07-20 DAL1301 - Jul 20, 12:20 UTCJul 20, 13:35 UTC1h 15m
2026-07-20 DAL1301 - Jul 20, 12:15 UTCJul 20, 13:31 UTC1h 16m
2026-07-20 DAL1606 ATL → PBI Jul 20, 02:25 UTCJul 20, 03:55 UTC1h 30m
2026-07-20 DAL1606 ATL → PBI Jul 20, 02:23 UTCJul 20, 03:47 UTC1h 24m
2026-07-19 DAL665 - Jul 19, 20:40 UTCJul 20, 00:45 UTC4h 5m
2026-07-19 DAL665 ATL → ONT Jul 19, 13:35 UTCJul 19, 17:20 UTC3h 45m
2026-07-19 DAL2450 JAX → ATL Jul 19, 11:15 UTCJul 19, 12:05 UTC50m
2026-07-18 DAL2189 - Jul 18, 23:20 UTCJul 19, 00:05 UTC45m
2026-07-18 DAL1512 - Jul 18, 18:25 UTCJul 18, 19:40 UTC1h 15m
2026-07-18 DAL1512 ATL → FLL Jul 18, 14:50 UTCJul 18, 16:35 UTC1h 45m
2026-07-18 DAL1515 - Jul 18, 10:35 UTCJul 18, 12:45 UTC2h 10m
2026-07-18 DAL2138 - Jul 18, 03:00 UTCJul 18, 05:00 UTC2h 0m
2026-07-17 DAL1579 - Jul 17, 23:39 UTCJul 18, 01:05 UTC1h 25m
2026-07-17 DAL1579 - Jul 17, 21:25 UTCJul 17, 21:44 UTC20m
2026-07-17 DAL1579 ATL → FLL Jul 17, 17:35 UTCJul 17, 19:40 UTC2h 5m
2026-07-17 DAL1462 - Jul 17, 14:44 UTCJul 17, 15:49 UTC1h 5m
2026-07-17 DAL1462 - Jul 17, 12:04 UTCJul 17, 13:15 UTC1h 10m
2026-07-16 DAL973 BOS → ATL Jul 16, 23:59 UTCJul 17, 02:10 UTC2h 10m
2026-07-16 DAL2595 ATL → BNH Jul 16, 20:00 UTCJul 16, 22:10 UTC2h 10m
2026-07-16 DAL2650 - Jul 16, 17:30 UTCJul 16, 18:44 UTC1h 15m
2026-07-16 DAL2650 - Jul 16, 14:45 UTCJul 16, 16:00 UTC1h 15m
2026-07-16 DAL1211 - Jul 16, 11:20 UTCJul 16, 12:44 UTC1h 25m
2026-07-16 DAL1588 ATL → MIA Jul 16, 00:00 UTCJul 16, 01:25 UTC1h 25m
2026-07-15 DAL2131 PHL → ATL Jul 15, 20:50 UTCJul 15, 22:20 UTC1h 30m
2026-07-15 DAL2131 ATL → PHL Jul 15, 17:15 UTCJul 15, 19:05 UTC1h 50m
2026-07-15 DAL644 - Jul 15, 13:25 UTCJul 15, 15:05 UTC1h 40m
2026-07-15 DAL644 IAH → ATL Jul 15, 13:22 UTCJul 15, 15:01 UTC1h 39m
2026-07-14 DAL1131 - Jul 14, 23:20 UTCJul 15, 01:10 UTC1h 50m
2026-07-14 DAL1341 FLL → ATL Jul 14, 19:45 UTCJul 14, 21:50 UTC2h 5m
2026-07-14 DAL1341 FLL → ATL Jul 14, 19:45 UTCJul 14, 21:40 UTC1h 55m
2026-07-14 DAL1341 ATL → FLL Jul 14, 16:35 UTCJul 14, 17:55 UTC1h 20m
2026-07-14 DAL2365 EWR → ATL Jul 14, 13:05 UTCJul 14, 14:40 UTC1h 35m
2026-07-13 DAL2498 ATL → EWR Jul 13, 23:40 UTCJul 14, 01:25 UTC1h 45m
2026-07-13 DAL2312 - Jul 13, 20:05 UTCJul 13, 21:55 UTC1h 50m
2026-07-13 DAL2312 EWR → ATL Jul 13, 20:01 UTCJul 13, 21:51 UTC1h 50m
2026-07-13 DAL2312 ATL → EWR Jul 13, 16:45 UTCJul 13, 18:30 UTC1h 45m
2026-07-13 DAL2899 AUS → ATL Jul 13, 13:25 UTCJul 13, 15:15 UTC1h 50m
2026-07-13 DAL1170 ATL → AUS Jul 13, 01:20 UTCJul 13, 03:20 UTC2h 0m
2026-07-12 DAL1341 - Jul 12, 20:25 UTCJul 12, 22:05 UTC1h 40m
2026-07-12 DAL1341 FLL → ATL Jul 12, 20:24 UTCJul 12, 22:00 UTC1h 36m
2026-07-12 DAL1341 ATL → FLL Jul 12, 17:01 UTCJul 12, 18:35 UTC1h 35m

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 N325DN page for operator, model, and routing details .

Mode-S A3813B frequently asked

What is Mode-S code A3813B?
A3813B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N325DN.
Where is Mode-S A3813B registered?
Mode-S code A3813B 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 A3813B broadcasting right now?
Yes. Mode-S A3813B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3813B, octal 50700473, decimal 10,715,451.
What flights does A3813B operate?
Mode-S A3813B has broadcast 20 distinct callsigns, including DAL838, DAL1881, DAL1878, DAL2487, DAL2871.