DDNS – Free Dynamic DNS Providers

DDNS – Free Dynamic DNS Providers

We maintain the #1 list of Dynamic DNS (DDNS) providers online. Dynamic DNS is a method that allows you to notify a Domain Name Server (DNS) to change in your active DNS configuration on a device such as a router or computer of its configured hostname and address. It is most useful when your computer or network obtains a new IP address lease and you would like to dynamically associate a hostname with that address, without having to manually enter the change every time. Since there are situations where an IP address can change, it helps to have a way of automatically updating hostnames that point to the new address every time. Enter DDNS to the rescue.

We are proud to be considered the top resource online for information on dynamic dns providers. This is a gentle, not-too-technical introduction on it, how it works, and a comprehensive list of mostly free providers. We have also provided some dynamic dns reviews on various hosting companies to help you better decide who to choose!

If you like this list, please link to it will help others find this free list more easily!

Name URL and domain selection Subdomains? Domains?
(June 2011)
http://www.dnsdynamic.org/Domains: *.user32.com, *.tftpd.net, *.wow64, etc (12+)
Free VPN Also Available
Free Free
(June 2011)
http://www.changeip.com/Domains: *.dumb1.com, *.wikababa.com, *.dynamic-dns.net, etc (100+) Free $3/mo
(June 2011)
http://www.no-ip.com/Domains: *.no-ip.com, *.servequake.com, *.sytes.net, etc. (21 domains) Free (5 domain limit) $15/yr
(June 2011)
http://freedns.afraid.org/Domains: *.afraid.org, many many others (they list about 300. no, really.) Free (donations encouraged) Free (donations encouraged)
(December 2011)
http://www.dyndns.com/18 Subdomains Available No Longer Free Free
(Pro: $15/yr)
(June 2011)
http://www.zonomi.com/ Free $10/yr
(June 2011)
http://www.zoneedit.com/ Free Free
(June 2011)
http://www.cjb.net/Domains: *.cjb.net Free N/A
(June 2011)
http://www.zerigo.com/managed-dns Free (Pro: $19/yr) Free
(June 2011)
http://www.3322.org/Chinese Domains: *.3322.org, *.8866.net, etc (quite a few, but seem to have trouble accessing their sites from US) Free N/A
(June 2011)
http://www.oray.com/Chinese Domains: *.xicp.net, etc (in Chinese) Free N/A
(June 2011)
http://www.darsite.com/engDomains: *.darweb.com $100/year $100/year
(5 Dec 2001)
http://www.ddns.nu/Domains: *.cable.nu, *.optus.nu, *.evangelion.nu, several others Reg Disabled Reg Disabled
(2 Nov 2002)
http://dns2go.deerfield.com/Domains: *.dns2go.com, *.idleplay.net, *.dynamic-site.net, others $9.95/year $19.95/year
(June 2011)
http://www.dhis.org/Domains: *.net.dhis.org Free N/A
(9 Dec 2001)
http://www.dhs.org/Domains: *.dhs.org $5 (one-time charge?) N/A
(2 Nov 2002)
http://www.dns4biz.de/Domains: Unknown Free (also for-pay options available) $4.99/month
DNS Exit
(2 Dec 2002)
http://www.dnsexit.com/ N/A Free
DNS Made Easy
(2 Nov 2002)
http://www.dnsmadeeasy.com/Domains: *.dnsmadeeasy.com, others Free $4.95/year (up to 5 domains)
DNS Park
(8 Dec 2005)
http://www.dnspark.com/services/dynamicDNS.php N/A $8.95/year
(5 Dec 2001)
http://www.dnsd.be/Domains: *.dnsd.be 5 Euro per year for the first
hostname; 4 Euro for additional
hostnames mapped to the same IP.
(9 Dec 2001)
http://www.dtdns.com/Domains: *.darktech.org, *.dtdns.net, *.etowns.com, others Free $20/year
(9 Dec 2001)
http://www.dyn.ee/Domains: *.dyn.ee, *.dynserv.[com/net/org] Free N/A
(5 Dec 2001)
http://www.dynaccess.deDomains: *.dyn-access.(com/net/org/de/info/biz),
several others
5 Euro/year (or more, depending on
name selected)
(5 Dec 2001)
http://www.dynamip.com/h N/A $3/month
(5 Dec 2001)
http://www.dyn.ro/Domains: *.dynam.ac, *.dyn.ro, *.my-ho.st, *.irc-chat.org Free N/A
(9 Dec 2001)
http://dyndns.dk/Domains: *.dyndns.dk, *.kyed.com, *.lir.dk, *.yaboo.dk Free $10/year
(5 Dec 2001)
http://www.dyndsl.com/Domains: *.dyndsl.com, *.45z.com, *.au2000.com Free N/A
(9 Dec 2001)
http://www.dynip.com/Domains: *.dynip.com, others $35.95/year and up (based on domain name chosen) $159.95/year
(5 Dec 2001)
http://dyns.cx/Domains: *.dyns.cx, *.dyns.net, *metadns.cx, others Free 15 Euro/year
(5 Dec 2001)
http://www.dynup.net/Domains: *.dynup.net Free N/A (“coming soon”)
Easy DNS
(5 Dec 2001)
https://web.easydns.com/ N/A $19.95/year
Home PC
(5 Dec 2001)
http://www.homepc.org/Domains: *.homepc.org Reg Disabled N/A
Hotline DNS
(5 Dec 2001)
http://www.hldns.com/Domains: *.hldns.com Free N/A
Microtech Ltd.
(5 Dec 2001)
http://www.microtech.co.gg/dns/Domains: *.freelancedeveloper.com, *.ohflip.com, *.microtech.co.gg, *.easydns4u.com Free 20 UKP/year
(5 Dec 2001)
http://www.minidns.net/Domains: *.minidns.net Free (“with quota”) Free (“with quota”)
(9 Dec 2001)
http://www.myserver.org/Domains: *.myserver.org, *.USArmyReserve.com, *.WidescreenHD.tv, several others Free $24.95/year
(2 Nov 2002)
http://www.nettica.com/ N/A $25/year, $45 for 2 years
Open Domain Server
(5 Dec 2001)
http://www.ods.org/Domains: *.ods.org Free $20/year for up to 5 domains
Planet DNS
(9 Dec 2001)
http://www.planetdns.net/Domains: *.planetdns.[net/org/biz/ca] $19.95/year $49.95/year
(5 Dec 2001)
http://www.powerdns.com/ N/A Free for up to five domains, per email from site admin.
(2 Nov 2002)
http://www.prout.be/dns/Domains: *.prout.be, *.dyn.prout.be Free N/A
(2 Nov 2002)
http://www.sitelutions.com/info/sldns N/A Free
Static Cling
(5 Dec 2001)
http://www.staticcling.org/Domains: *.staticcling.org Free N/A
That IP
(2 Nov 2002)
http://www.thatip.com/Domains: *.thatip.com $10 for up to 5 names $10 for up to 5 names
Turnkey Hub
(June 2011)
https://hub.turnkeylinux.org/Domains *. TKLAPP.com
Cloud Services with Turnkey Hub, but pricing based on Amazon EC3
Free Free
TZO Internet
(5 Dec 2001)
http://www.tzo.com/Domains: *.tzo.com, *.tzo.net, *.tzo.org, *.tzo.cc $24.95/year $59.95/year
$99.95/2 years
(9 Dec 2001)
http://www.whyi.org/Domains: *.yi.org,*.whyi.org,*.weedns.com,*.b0b.org Free N/A
(June 2011)
http://www.xname.org/Domains: *.xname.org Free N/A
Widge DNS
(3 Dec 2002)
http://dns.widge.net/ N/A Free
World Wide DNS
(5 Dec 2001)
http://www.worldwidedns.net/ N/A $39/year

Can there be only one such feed?

Of course not. Here are a few other lists of Dynamic DNS Providers and review sites:

DNS? What’s that?

DNS, the Domain Name Service, is responsible for helping the Internet to function as it does today. The Internet is divided into literally
millions of domains; each one has its own name.  DNS helps to translate that name into an actual location (IP address).

To a human, names like that (or ibm.com, or yahoo.com, or any of the
other four million domain names registered) make perfect sense.

Dotted Quads?

IP addresses consist of four numbers, each between 0
and 255. More or less. (Some blocks of numbers are reserved for a
variety of special purposes.)

But not to the computer.

The computer doesn’t have a clue. Computers work with numbers.
Computers use IP addresses (“dotted quad” numbers like to talk with each other on the Internet.

DNS is the middleman, translating domain names into numbers (and,
occasionally, the other way around).

Great. But why “dynamic DNS?”

Glad you asked. Let’s review!

Got Numbers?

In theory, there are 232 (about 4.29e9, 4
billion or so) possible
numeric addresses for the Internet in IPv4. In practice, though, many of them were
allocated in an inefficient manner a long time ago, in a way that can’t
easily be undone today. Some groups, like MIT, were given literally millions of
addresses, more than they can ever use, but it’s not really practical for
them to give them back now. (IP routing is an ugly thing indeed. Ask
anyone who has to deal with CIDR; earplugs to muffle the blood-curdling
screams of terror are optional.)

Over the next few years, IPv6 will be phased in, increasing
the number of addresses to 2128 (3.40e38, give or take), enough
for everyone and all their major appliances to have an address. But until

There’s only so many numbers out there, at least as far as the computer
is concerned. (Basically, each of the four parts in the “dotted quad”
address can only be between 0 and 255.) Silly technical limitations eat up
a lot of those addresses; historical design decisions eat up some more;
and of course a LOT of them are already in use.

This means that Internet IP addresses are a finite, scarce resource,
and have to be treated somewhat carefully.

Suppose you have a normal, $20 per month, Internet dialup account from
“Some Local ISP, Inc.” They have three thousand customers, but
it’s rare that all of them are online at the same time. (In fact, if they
follow industry practice, they probably only have 500 or so phone lines
anyway.) So that ISP may only have 600 or 700 IP addresses — enough to
provide one for each phone line, a few for internal use, a few for future
growth, but nowhere near one for each of those 3000 customers.

Or maybe you have a cable modem, though “Big CableCo Inc.”
Whenever your cable modem goes online (when you first plug it in and turn
it on), it broadcasts a request for an open address, and some computer in
their office eventually answers. Cable modem addresses are usually
assigned with “leases,” which work just like the lease on an apartment –
you’re guaranteed to have that address for a certain time, but after that
all bets are off. Your landlord (the cable company) might evict you,
forcing you to move (get a new IP address) at the end of the lease. (These
‘leases’ usually only last for a few days, and sometimes only a few
hours.) At the end of the lease, you may be able to negotiate a new lease,
but you can’t be sure of it.

So not everyone can have their own IP address. Your ISP, cable company,
or whoever, might let you have a dedicated IP, but they’ll probably charge
you extra for it. It’s more likely, though, that they can’t or won’t help

Imagine if the phone company changed your number twice a day — people
would have a hard time calling you.

Fortunately, most home users don’t need to worry about all this
“dynamic DNS” stuff. If you just want to get online, check your email,
look at a few Web sites, your specific address doesn’t matter. You’ll get a fresh address every
time you dial in, that’s all yours for as long as you stay connected, and
since other people aren’t trying to connect to your computer, you’re all

If you want to run a BBS, or Web server, or any number of other
services, on your home computer, though, having your IP address change all the time is a real problem.

Enter DDNS, otherwise known as Dynamic DNS services or Free DNS. They act like old-style phone operators:
other users call the operator, and ask to speak to you, and magic happens.
Every time your computer comes online, you tell the DDNS server what your
current address is. Other users, through the magic of DNS, will be sent to
the right place.

Sounds neat. Tell me more about how DNS works.

It gets a bit more technical here. If you just want to run a
part-time Web server, or Shoutcast server, or something like that, you
probably don’t need to know most of this. But it may come in handy, and
it’s (I hope) interesting anyway. If you want to run a BBS, you’ll almost
certainly need to read on.

Sidebar: When aren’t DNS mappings one-to-one?

Really big Internet services, like Yahoo!, can’t possibly
be run on one computer. Many different numbers point to “www.yahoo.com.” Behind the scenes,
most of Yahoo’s services are handled by big databases anyway.

It goes the other way too. It’s possible for one computer
(thus, one number) to host many Web sites.

The most interesting, and useful, types of DNS records are A
records, MX records, and CNAME records.

“A” records specify Addresses. An A record usually matches a
single name to a single number. For instance, as I write this, it matches
the domain name “technopagan.org” to the number
“″. (Don’t use that number for anything; I have a
dynamically-assigned address too.) This mapping isn’t always one-to-one,
but for this discussion let’s pretend they are.

“MX” stands for Mail eXchanger. MX records specify other
computers that handle mail for a given domain. To continue the phone
analogy: My primary MX is my home phone. If you can’t reach me there,
though, you might try my pager (a secondary MX) or my cell phone (another
secondary). If a domain doesn’t have an MX listed, the address from the A
record will be used.

CNAME stands for Canonical Name. It specifies aliases – other names
that a computer answers to. Suppose you want to look like a big company,
running a Web server, FTP server, news, IRC, and other services too. But
you can’t afford to buy a dozen computers to run them all. So you set up a
number of CNAMEs for your one computer: www.yourdomain.net,
ftp.yourdomain.net, irc.yourdomain.net, bbs.yourdomain.net, and others.
That one computer could run all those servers at once.

Sidebar: TTL

“TTL” stands for “Time To Live.” It’s
one of the parts of a DNS record, and it basically says how long a given
record is valid before your computer should double-check to make sure the
computer hasn’t “moved.” Most computers don’t move often, so their DNS
entries “live” for hours or days. The secret to Dynamic DNS is
that its entries usually live for five minutes or less.

There are other DNS records, from the never used WKS, to PTR and HINFO,
to the dreaded “in-addr.arpa” record. But they are beyond the
scope of this document. For a good primer to DNS in general, see the Linux
DNS HOW TO at http://www.ibiblio.org/pub/Linux/docs/howto/DNS-HOWTO.

Or go through the guide published by Quotefully.com at their blog for Google DNS Servers

If you’re interested in running a DDNS service of your own (you brave
soul, you), there are a couple things to do: Either write the software
yourself (as the people at Dynup.net
have done), or get a ready-made package from someplace (like CheapNet).

I don’t want this to become a list of “dynamic DNS software providers,”
but here’s a (partial, incomplete) list of pre-made packages:

  • GNUdip
  • GNUdip2 (no, I don’t
    know what the distinctions are)
  • A DDNS server for Windows

Okay, I’m sold. From whom can I get Dynamic DNS service?

Above you will find a list of providers that we are doing our best to keep up to date. (The date at the top of this document shows you when I last
checked all these sites; then, at least, they all appeared to be in
business and taking new customers. If things have changed since then and you would like to leave a dynamic dns review, let
me know by leaving a comment below.

Sidebar: TOS

“TOS” stands for “Terms Of Service.”
When you signed up with your ISP, or DSL or cable modem provider, you
probably had to sign (or click “I Agree”) to one of these. Usually, they
say you cannot run a Web server, or any other kind of server, off
your home computer. Be sure you check this before you start publicizing
your new Web site, or else you might not have any Internet access at all.

But first, let me explain the table.

quot;Subdomains” means you get a sub-domain of a name the company
already owns. If your computer is named fred, and you buy this kind of
service from “Some Big ISP,” at somebigisp.net, your domain name
will be fred.somebigisp.net.

“Domains” means you’ve purchased your own Internet domain
name. This will be something like “yourdomain.com”. There are
literally hundreds of places that can sell dotcom names and others as
well. I’ve gotten good prices and good results, both personally and
professionally, from GoDaddy. The
name is lame and cheesy, but for domain names starting at about seven
bucks a year, the price is hard to beat.

The inevitable “?” means that the Web site in
question doesn’t list the information, or that it’s sufficiently confusing
that I gave up looking for it. (Usually, it means that you can only get
the information if you sign up. I don’t want to pollute all these
different databases by creating accounts I’ll never use, and I don’t even
know what I’d do with 100 extra domain names.