This is a list of all of PSINet's service machines and, where appropriate, their IP addresses. Depending on your service, you may need to know some, none or all of this. If you need any help, please email or phone us.

DNS Servers

res1.dns.uk.psi.net (154.32.105.18)
res2.dns.uk.psi.net (154.32.107.18)
res3.dns.uk.psi.net (154.32.109.18)
res4.dns.uk.psi.net (154.15.243.2)
res5.dns.uk.psi.net (154.15.244.2)
res6.dns.uk.psi.net (154.15.245.2)

(DNS software will require you to enter the IP address rather than the name)

SMTP Mail Servers

mx1.mail.uk.psi.net
mx2.mail.uk.psi.net

Note: If you have a leased line and you run your own mail server and DNS, you can use mx1 and mx2 as secondary MX records. If you do, please list them with equal priority in the DNS.

POPMail Server

pop1.mail.uk.psi.net

News Server - for reading and posting via an NNRP/NNTP client (eg, Netscape, Agent, MS News)

nnrp.news.uk.psi.net

News Servers - for NNTP news hosts

nntp.news.uk.psi.net
nntp1.news.uk.psi.net
nntp2.news.uk.psi.net
nntp3.news.uk.psi.net
nntp4.news.uk.psi.net
nntp5.news.uk.psi.net

Note: Your NNTP server should be configured to post to nntp.news, and accept inbound connections from ALL the other servers.

The current list of active newsgroups is available at ftp://ftp.uk.psi.net/pub/usenet-config/

Web Cache Server

cache.www.uk.psi.net

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