ARDC

Amateur Radio Digital Communications (ARDC) manages the 44.*.*.* IP address space and awards grants to cool #hamradio and tech projects.

[ARDC @ARDC_73]

Reminder: Our next grant application deadline is Feb. 1. We welcome projects across amateur radio and digital communications, with our priority areas being R&D, space-based communications, and open source education. Apply at https://t.co/Jm2jeHWEC0. #ardc

[ARDC @ARDC_73]

Congrats to our grantees at Case Amateur Radio Club W8EDU for becoming the first collegiate club to earn the ARRL DXCC Trident Award: https://t.co/HdmDnNKUGj. #ardc #ardcgrantees #amateurradio #hamradio #science #technology

[ARDC @ARDC_73]

Our latest YouTube video features Schuyler Erle's N0GIS talk from the Zero Retries Digital Conference (ZRDC) 2025: https://t.co/tllQRRmAJ6. Video courtesy of Zero Retries: https://t.co/s4A9S19cAK. #ardc #44net #amateurradio #digitalcommunications

[ARDC @ARDC_73]

Our grantees at @TeachersInSpace are hosting an Introduction to CubeSat Flight Experiments on January 24-25, 2026 in Albuquerque, NM. The event is open to NM K-12 & informal educators, librarians, teaching assistants, and aides. Visit https://t.co/nQY6m2WxZa to learn more.

[ARDC @ARDC_73]

In the mid-1980’s, Phil Karn KA9Q implemented TCP/IP for amateur packet radio on IBM PC’s, helping unlock IP over RF for hams long before the Internet was widely available. #44Net #44yearsof44net #hamradio #amateurradio #digitalinnovation

[ARDC @ARDC_73]

Over the Holidays, ARDC Board Member Harald Welte gave a talk at the 39th Chaos Communication Congress. You can watch the talk here: https://t.co/w95jb7Goj7 #ardc #chaoscommunity #opensource #digitalcommunications

[ARISS - Amateur Radio on the ISS @ARISS_Intl]

The first SPARKI workshop of 2026 is later this month, in the shadow of the Artemis rocket at KSC.

Learn more about the SPARKI program at https://t.co/orSdwjmqHC and thanks to @ARDC_73 for the support!

[ARDC @ARDC_73]

In September 1981, Hank Magnuski KA6M contacted Jon Postel and acquired the 44.0.0.0/8 block of ~16M IPv4 addresses for #amateurradio experimentation. #44net #44yearsof44net #digitalcommunications

[ARDC @ARDC_73]

44Net has remained active for more than four decades, continuing to support amateur radio experimentation with IP networking. #44net #44yearsof44net #amateurradio #digitalinnovation

[ARDC @ARDC_73]

ARDC will be closed for the holidays starting tomorrow, 12/20/2025, and we'll return to the office on Monday, 1/5/2026. Have a great holiday season, and we'll see you in 2026! #ardc #amateurradio 📸 Heather Katsoulis, licensed under CC BY-SA 2.0.

[ARDC @ARDC_73]

On December 10, 2025, 45 years after Hank KA6M put up the first digipeater in the U.S., ARDC debuted 44Net Connect, an easy-to-use service helping hams get started with 44Net. #ardc #44net #44yearsof44net #44netconnect

[ARDC @ARDC_73]

@supersat BGP docs are in progress pending further testing. If you haven't already, I encourage you to check out our new subgroup to connect with others using 44Net Connect: https://t.co/R1NQf1j9CA.

[ARDC @ARDC_73]

Big news for hams and experimenters: 44Net Connect is live! 🎉
A simple, modern way to start using 44Net IP’s, with no complex setup required.
Works with a wide range of devices that support WireGuard.
Check out the related blog post to learn more: https://t.co/IZpfKx5pHS

[ARDC @ARDC_73]

Our November/December 2025 Newsletter is live! Check it out for the latest news & updates: https://t.co/derczuE9lx. Like getting updates from ARDC? Subscribe to our Newsletter: https://t.co/oe5PFcmbD8. 📸"Happy Holidays" by Muffet is licensed under CC BY 2.0.

[ARISS - Amateur Radio on the ISS @ARISS_Intl]

It's always a good time to be thankful, and we would like to thank our ARISS-USA sponsors including:
@NASA SCaN
@ISS_CASIS
@ARDC_73
@AMSAT
& @arrl

[ARDC @ARDC_73]

HAMNET is one of the longest-running and largest amateur radio community networks– spanning Germany and neighboring countries. Entirely volunteer built and self-organized, it’s a standout example of a self-governing, community-driven network: https://t.co/DUNlOzNa0I. #hamnet

[ARDC @ARDC_73]

🎉 Today, we celebrate 45 years since Hank Magnuski KA6M put up the first digipeater in the U.S.: a significant milestone for packet radio! 🎉 #packetradio #digitalinnovation #digitalcommunications #amateurradio

[ARDC @ARDC_73]

On Dec. 10, 1980, Hank Magnuski KA6M put up the 1st digipeater in the U.S., motivating the growth of #packetradio in the Bay Area: https://t.co/9w9MwDuF44 #hamradio #amateurradio #digitalcommunications #digitalinnovation

[ARDC @ARDC_73]

Happy International Volunteer Day! 🎉
We'd like to give a huge thank you to all of our wonderful volunteers. Your commitment strengthens the AR and DC communities and helps ARDC make a global impact. We couldn't do this work without you! #internationalvolunteerday #ardcvolunteers

[ARDC @ARDC_73]

Hank Magnuski KA6M was among the first hams to send a packet through a satellite, experimenting with AO-10 after its 1983 launch. #hamradio #packetradio #44net #44yearsof44net

[ARDC @ARDC_73]

44Net was one of the earliest large-scale IP networks outside of ARPANET, connecting hams with TCP/IP over radio before the Internet was mainstream. #44Net #Networking #amateurradio #digitalcommunications #digitalinnovation