Keeping Sweden in sync with Netnod’s Time and Frequency services
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Time and Frequency 

Netnod’s Time and Frequency services include a free Network Time Protocol (NTP) service available to anyone, anywhere, and a Precision Time Protocol (PTP) service that offers traceable time and frequency to the degree of accuracy needed in industries ranging from banking and financial services to telecommunications and the energy sector.

With more than 20 years of experience at the core of the Internet, Netnod has the established expertise for providing critical infrastructure support, ranging from DNS services and root server operations to Internet exchange points and Time and Frequency services.

PTP
Precision Time Protocol (PTP)
Netnod’s PTP service is delivered over a dedicated fibre and offers a robust, reliable and highly accurate source for time and frequency. For mission-critical services, it makes good business sense to have multiple sources of time and frequency to ensure redundancy. If you are working in a sector where every millisecond counts, you can trust Netnod to keep you on time.
Documents & Presentations
Materials about NTP
Redundant Distributed Timescale Traceable to UTC(SP) paper
Redundant Distributed Timescale Traceable to UTC(SP) Poster
PTP brochure
NTP, time how and why presentation by Patrik Fältström - Netnod autumn meeting 2015
Elektroniska rättshandlingar och avtalsrättsliga tidsfrister - Patrik Fältström - 2013-05-19
Network Time Protocol from a distributed timescale traceable to UTC - Paf & Sundblad - Netnod Spring Meeting 2016
Artikel om Netnod NTP - Nu behöver inte Sverige importera tid. Särtryck från DN (Swedish article)
All NTP materials