Station info - map view · info · telemetry · weather · raw · status · beacons · messages · bulletins · browse · moving · my account
Callsign, ship name or locator: Clear       
It is possible to search using wildcards (*?) after a prefix. Example: OH*
APRS station KC1TLF-10 - show graphs
Comment: Winlink
Location: 42°38.50' N 71°27.50' W - locator FN42GP54AA - show map
4.2 km Southeast bearing 152° from Dunstable, Middlesex County, Massachusetts, United States [?]
4.8 km Southwest bearing 215° from Tyngsboro, Middlesex County, Massachusetts, United States
45.4 km Northwest bearing 314° from Boston, Suffolk County, Massachusetts, United States
47.9 km Northwest bearing 316° from South Boston, Suffolk County, Massachusetts, United States
Last position: 2025-11-21 05:33:42 UTC (12d 6h32m ago)
2025-11-21 00:33:42 EST local time at Dunstable, United States [?]
Position ambiguous: Precision reduced at transmitter by 2 digits, position resolution approximately 1.9 km.
Last telemetry: 2024-05-07 16:16:36 UTC (574d 19h49m ago) – show telemetry
Battery: 82 Percent, Charging/AC: 48 Charge/On/Off, GPS+Sat: 2 Sats/On/Off, Current: 0 mA, A5: 0 N/A
 A/C     Charging     GPS     B4     B5     B6     B7     B8 
Device: KJ4ERJ: APRSIS32 (software, Windows)
Last path: KC1TLF-10>APWW11 via TCPIP*,qAC,T2PERTH
Positions stored: 3
Items and objects originated: Dock
Other SSIDs: KC1TLF KC1TLF-12 KC1TLF-5 KC1TLF-3
Bulletins:
BLN0: Billerica ARS In-Person and Online Club Meeting First Wednesdays of the month at 7pm. See W1HH.org for more details. (12d 6h36m ago)
BLN1: Billerica ARS Weekly Net Wednesdays at 8pm on WB1GOF Repeater. See W1HH.org for details. (12d 6h36m ago)
About this site
This page shows real-time information collected from the Automatic Position Reporting System Internet network (APRS-IS). APRS is used by amateur (ham) radio operators to transmit real-time position information, weather data, telemetry and messages over the radio. A vehicle equipped with a GPS receiver, a VHF transmitter or HF transceiver and a small computer device called a tracker transmits it's location, speed and course in a small data packet, which is then received by a nearby iGate receiving site which forwards the packet on the Internet. Systems connected to the Internet can send information on the APRS-IS without a radio transmitter, or collect and display information transmitted anywhere in the world.
User guide · FAQ · Blog · Discussion group · Linking to aprs.fi · AIS sites · Service status · Database statistics · Advertising on aprs.fi · Technical details · API · Change log · Planned changes · Credits and thanks · Terms Of Service · iPhone/iPad APRS