Apparatus

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sensors Mode-S transponder

A0817F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N13113 · BOEING 757-200 · operated by UNITED AIRLINES INC

Hex
A0817F
Octal
50100577
Decimal
10,518,911
Country
US
Tail
N13113
Type
B752
Broadcasting now · callsign UAL2759 · 14,200 ft
Flights observed
101
Distinct callsigns
20
Country
US
Last broadcast
8d ago

Current position

A0817F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A0817F 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
UAL912 United Airlines 6 2026-07-25
UAL712 - 5 2026-07-14
UAL661 United Airlines 5 2026-07-24
UAL282 - 4 2026-07-13
UAL2115 - 4 2026-07-12
UAL118 - 4 2026-07-16
UAL3928 United Airlines 3 2026-07-17
UAL3891 United Airlines 3 2026-06-07
UAL350 - 3 2026-06-27
UAL316 United Airlines 3 2026-07-26
UAL2743 - 3 2026-07-09
UAL139 United Airlines 3 2026-07-20
UAL913 - 2 2026-07-01
UAL663 - 2 2026-07-04
UAL648 United Airlines 2 2026-07-22
UAL399 United Airlines 2 2026-07-25
UAL398 - 2 2026-07-20
UAL37 United Airlines 2 2026-07-22
UAL351 - 2 2026-06-28
UAL2812 United Airlines 2 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL316 DUB → EWR Jul 26, 13:05 UTCJul 26, 20:05 UTC7h 0m
2026-07-26 UAL228 IAD → DUB Jul 26, 03:35 UTCJul 26, 10:05 UTC6h 31m
2026-07-25 UAL399 CLE → EWR Jul 25, 11:59 UTCJul 25, 17:33 UTC5h 34m
2026-07-25 UAL399 CLE → EWR Jul 25, 11:40 UTCJul 25, 17:40 UTC6h 0m
2026-07-25 UAL912 KEF → ORD Jul 25, 08:10 UTCJul 25, 08:35 UTC25m
2026-07-25 UAL912 KEF → ORD Jul 25, 03:00 UTCJul 25, 04:10 UTC1h 10m
2026-07-24 UAL661 ORD → EWR Jul 24, 21:35 UTCJul 24, 23:25 UTC1h 50m
2026-07-23 UAL2248 BOS → EWR Jul 23, 03:15 UTCJul 23, 07:55 UTC4h 40m
2026-07-22 UAL648 EWR → SFO Jul 22, 19:10 UTCJul 23, 00:45 UTC5h 35m
2026-07-22 UAL648 EWR → SFO Jul 22, 19:03 UTCJul 23, 00:37 UTC5h 34m
2026-07-22 UAL37 EDI → EWR Jul 22, 09:44 UTCJul 22, 16:34 UTC6h 50m
2026-07-22 UAL37 EDI → EWR Jul 22, 00:55 UTCJul 22, 15:45 UTC14h 50m
2026-07-20 UAL2788 DEN → EWR Jul 20, 22:35 UTCJul 21, 00:30 UTC1h 54m
2026-07-20 UAL139 EWR → KEF Jul 20, 12:45 UTCJul 20, 13:05 UTC20m
2026-07-20 UAL139 EWR → KEF Jul 20, 12:54 UTCJul 20, 18:10 UTC5h 16m
2026-07-20 UAL139 EWR → KEF Jul 20, 12:54 UTCJul 20, 18:20 UTC5h 26m
2026-07-20 UAL398 - Jul 20, 10:05 UTCJul 20, 10:25 UTC20m
2026-07-20 UAL398 - Jul 20, 05:00 UTCJul 20, 07:10 UTC2h 10m
2026-07-17 UAL3928 FRA → EWR Jul 17, 12:40 UTCJul 17, 14:44 UTC2h 5m
2026-07-17 UAL3928 FRA → EWR Jul 17, 07:25 UTCJul 17, 12:35 UTC5h 10m
2026-07-17 UAL3928 FRA → EWR Jul 17, 07:13 UTCJul 17, 14:34 UTC7h 21m
2026-07-16 UAL118 ORD → EDI Jul 16, 05:02 UTCJul 16, 11:43 UTC6h 41m
2026-07-16 UAL118 - Jul 16, 04:30 UTCJul 16, 11:45 UTC7h 15m
2026-07-15 UAL661 EWR → ORD Jul 15, 20:50 UTCJul 16, 00:20 UTC3h 30m
2026-07-15 UAL271 - Jul 15, 11:35 UTCJul 15, 18:25 UTC6h 50m
2026-07-15 UAL270 - Jul 15, 02:45 UTCJul 15, 08:45 UTC6h 0m
2026-07-14 UAL2227 - Jul 14, 19:45 UTCJul 15, 01:00 UTC5h 14m
2026-07-14 UAL712 EWR → LAX Jul 14, 00:53 UTCJul 14, 05:27 UTC4h 34m
2026-07-14 UAL712 - Jul 14, 00:45 UTCJul 14, 05:30 UTC4h 45m
2026-07-13 UAL282 FAO → EWR Jul 13, 13:26 UTCJul 13, 20:56 UTC7h 30m
2026-07-13 UAL282 FAO → EWR Jul 13, 13:15 UTCJul 13, 20:50 UTC7h 35m
2026-07-13 UAL281 EWR → FAO Jul 13, 04:05 UTCJul 13, 10:55 UTC6h 50m
2026-07-12 UAL274 SFO → EWR Jul 12, 18:25 UTCJul 12, 23:45 UTC5h 20m
2026-07-12 UAL2115 - Jul 12, 09:55 UTCJul 12, 15:40 UTC5h 45m
2026-07-11 UAL274 - Jul 11, 18:35 UTCJul 12, 00:15 UTC5h 40m
2026-07-11 UAL2115 - Jul 11, 10:10 UTCJul 11, 15:40 UTC5h 30m
2026-07-10 UAL8197 - Jul 10, 21:10 UTCJul 11, 02:50 UTC5h 40m
2026-07-10 UAL1777 - Jul 10, 12:15 UTCJul 10, 18:35 UTC6h 20m
2026-07-10 UAL327 SAN → EWR Jul 10, 05:00 UTCJul 10, 10:15 UTC5h 15m
2026-07-09 UAL210 EWR → SAN Jul 9, 22:30 UTCJul 10, 03:40 UTC5h 10m
2026-07-09 UAL2743 - Jul 9, 14:15 UTCJul 9, 18:50 UTC4h 35m
2026-07-09 UAL712 - Jul 9, 01:05 UTCJul 9, 05:50 UTC4h 45m
2026-07-09 UAL712 - Jul 9, 00:45 UTCJul 9, 01:00 UTC15m
2026-07-08 UAL2127 - Jul 8, 17:40 UTCJul 8, 22:30 UTC4h 50m
2026-07-06 UAL712 - Jul 6, 06:30 UTCJul 6, 11:40 UTC5h 10m
2026-07-05 UAL1283 EWR → ATL Jul 5, 20:00 UTCJul 5, 23:25 UTC3h 25m
2026-07-05 UAL1759 - Jul 5, 10:10 UTCJul 5, 12:20 UTC2h 10m
2026-07-05 UAL1759 - Jul 5, 05:55 UTCJul 5, 06:20 UTC25m
2026-07-04 UAL1758 DEN → KOA Jul 4, 20:23 UTCJul 5, 02:59 UTC6h 36m
2026-07-04 UAL1758 - Jul 4, 20:10 UTCJul 4, 22:35 UTC2h 25m

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 N13113 page for operator, model, and routing details .

Mode-S A0817F frequently asked

What is Mode-S code A0817F?
A0817F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N13113.
Where is Mode-S A0817F registered?
Mode-S code A0817F 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 A0817F broadcasting right now?
Yes. Mode-S A0817F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0817F, octal 50100577, decimal 10,518,911.
What flights does A0817F operate?
Mode-S A0817F has broadcast 20 distinct callsigns, including UAL912, UAL712, UAL661, UAL282, UAL2115.