Celerity Internet

Celerity Internet Celerity Internet provides High-Speed Broadband Service to Western South Dakota and NE Wyoming

Celerity Networks was formally started in September of 2011 but unofficially began with an idea and passion for network engineering and design in early 2009. The principles of Celerity Networks have a combined 40 years of network design and engineering experience.
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Celerity Networks began offering consulting services to ISP's and WISP's in network design and best practices in 2011. In early 2012

we began the deployment of WISP services in the Spearfish, SD area. With our first tower deployed by the end of April 2012 Celerity Networks was able to begin servicing hundreds of rural residents with high speed internet connectivity with performance equal to and some cases better than dsl/cable service.

06/09/2026

RESOLVED - 6/9/26 4:15 PM
All work has been completed and network is fully restored.

UPDATE - 6/9/26 2:00 PM
The outages have been restored and network performance should be back to normal. Our upstream provider is still working on full restoration, but our services have been restored temporarily in the mean time. We will update again when they are hands-off on their work.

NETWORK SLOWDOWN AND OUTAGE - 6/9/26 10:45AM MDT
Hello. At about 10:45 AM MDT, we lost five of our fiber circuits due to (presumably) a fiber optics line cut.
Services in these areas are currently down as a result:
Lead/Deadwood
Boulder Canyon
Maitland Rd/Christensen Rd (Spearfish)
Other areas remain up, but are experiencing network slowdowns to varying degrees.
We will update when we know more, but a tickets have been opened with our upstream fiber provider.

06/09/2026

RESOLVED - 6/9/26 4:15 PM
All work has been completed and network is fully restored.

UPDATE - 6/9/26 2:00 PM
The outages have been restored and services should be back online now. Our upstream provider is still working on full restoration, but our services have been restored temporarily in the mean time. We will update again when they are hands-off on their work.

OUTAGE - 6/9/2026 10:35AM
Terry Peak, Boulder Canyon and Maitland (fiber) Areas

An upstream provider has had a fiber cut, and it is impacting the listed towers and fiber network. Once their repair is complete, our services should restore automatically.

Our Whitewood office will be closed on Monday, May 25th in honor of Memorial Day. We will reopen on Tuesday at 8 am MST....
05/23/2026

Our Whitewood office will be closed on Monday, May 25th in honor of Memorial Day. We will reopen on Tuesday at 8 am MST. If you need any tech support please call in and speak with our 24/7 tech support staff. Have a great weekend!

Celerity Internet will be closed Monday, February 16th in observation of Presidents day. We will resume regular office h...
02/13/2026

Celerity Internet will be closed Monday, February 16th in observation of Presidents day. We will resume regular office hours on Tuesday.

Thank you for a wonderful year! We will be closed on January 1st 2026. Happy New Year!!!
12/31/2025

Thank you for a wonderful year! We will be closed on January 1st 2026. Happy New Year!!!

Happy Holidays! We will be closed noon on December 24th and December 25th and 26th. If you are having any service issue...
12/23/2025

Happy Holidays! We will be closed noon on December 24th and December 25th and 26th. If you are having any service issues please feel free to email [email protected] and one of our oncall staff will be in touch.

Happy Thanksgiving! Our office will be closed until Monday. If you need any tech support please leave us a voicemail and...
11/26/2025

Happy Thanksgiving! Our office will be closed until Monday. If you need any tech support please leave us a voicemail and our on call crew will reach back out.

Enjoy the holiday! We'll be closed and back open on Tuesday. If you are having any issues please reach out and our suppo...
08/30/2025

Enjoy the holiday! We'll be closed and back open on Tuesday. If you are having any issues please reach out and our support team will be in touch.

Our office will be closed on July 4th in observance of Independence Day. Have a happy 4th!
07/03/2025

Our office will be closed on July 4th in observance of Independence Day. Have a happy 4th!

06/27/2025

RESTORED - Services have been restored now. Thanks for your patience.

Outage - 6/27/25 2:30 AM MDT
Hello. We are currently upgrading software on some core equipment, which has resulted in an outage. We will post again when services are restored.

Address

909 Thompson Street
Whitewood, SD
57793

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

+16053400641

Website

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