On January 1, 1985, the first top-level domains went live. Six of them — .com, .edu, .gov, .mil, .org, and .net — would define the structure of the internet for decades. Each had a specific purpose, though their actual use would eventually diverge dramatically from original intentions.
The Original Six
RFC 920 (“Domain Requirements,” October 1984) and RFC 1032 (“Domain Administrators Guide,” November 1987) laid out the original TLD structure:
.com — Commercial
Purpose: Commercial organizations and businesses.
Reality: Eventually became the default choice for everything. Today, .com is the most valuable and sought-after TLD, with over 150 million registrations.
The first .com registration was symbolics.com on March 15, 1985, by Symbolics, Inc., a computer manufacturer. We’ll explore this milestone in the timeline chapter.
.edu — Educational
Purpose: Educational institutions, primarily US colleges and universities.
Reality: Remains restricted to accredited US post-secondary institutions. Unlike .com, .edu stayed relatively true to its original purpose. EDUCAUSE has administered .edu since 2001.
The limited scope means only about 8,000 .edu domains exist today — exclusivity creates prestige.
.gov — Government
Purpose: US federal government agencies and entities.
Reality: Remained restricted. Only verified US government organizations can register .gov domains. The General Services Administration (GSA) administers it today.
State and local governments were historically excluded from .gov, leading to domains like ca.gov for California (a subdomain) but not california.gov. This policy has relaxed somewhat in recent years.
.mil — Military
Purpose: US military.
Reality: Exclusively for US Department of Defense entities. The Defense Information Systems Agency (DISA) operates it. .mil is the most restricted of the original TLDs.
.org — Organizations
Purpose: Non-commercial organizations (non-profits, associations, etc.).
Reality: Originally intended for non-profits, but never restricted by policy. Anyone could register a .org. Today, .org hosts about 10 million domains including both non-profits and commercial entities.
Public Interest Registry (PIR), a non-profit itself, has operated .org since 2003.
.net — Network
Purpose: Network infrastructure providers (ISPs, network operators).
Reality: Like .org, .net was never restricted. It became the fallback when your .com was taken. Today, .net has about 13 million registrations spanning all types of organizations.
Verisign operates .net (same as .com).
.arpa — The Infrastructure TLD
One more TLD deserves mention: .arpa (Address and Routing Parameter Area).
.arpa was originally the TLD for ARPANET hosts during the DNS transition. It later became reserved for infrastructure purposes:
- in-addr.arpa: Reverse DNS lookups for IPv4
- ip6.arpa: Reverse DNS lookups for IPv6
- e164.arpa: Telephone number mapping (ENUM)
.arpa isn’t available for registration — it’s purely technical infrastructure managed by IANA.
Country Code TLDs
RFC 920 also established country code TLDs (ccTLDs) based on ISO 3166-1 alpha-2 codes:
- .us — United States
- .uk — United Kingdom
- .de — Germany
- .jp — Japan
- .au — Australia
Each country could administer its ccTLD according to local policy. Some (like .uk) restricted registration; others (like some Pacific island nations) eventually sold domains globally for revenue.
By 1985, most major countries had ccTLDs, though adoption varied widely.
The Registration Process (1985-1995)
For the first decade, domain registration was:
- Free — No charge for registration
- Manual — Submit requests to SRI-NIC (later Network Solutions)
- Minimal verification — Basic checks that the request was legitimate
- Slow — Could take days or weeks
There was no commercial market for domains. Organizations registered what they needed; nobody was buying domains speculatively.
This would change dramatically in 1995, as we’ll see in a later section.
Why These Six?
The choice of original TLDs reflected 1984’s internet:
Military funding: The internet was a DARPA project. .mil and .gov recognized government stakeholders.
Academic foundation: Universities ran most of the internet. .edu acknowledged their central role.
Commercial potential: Even in 1984, commercial use was anticipated. .com reserved space for businesses.
Infrastructure needs: .net was for the organizations building the network itself.
Everyone else: .org caught what didn’t fit elsewhere.
The structure assumed a relatively small, organized internet. Nobody anticipated that .com would dominate or that .org would be used commercially.
Original Registration Stats
Growth was slow by modern standards:
| Year | Total .com Registrations |
|---|---|
| 1985 | 6 |
| 1986 | 12 |
| 1987 | 28 |
| 1988 | 82 |
| 1989 | 369 |
| 1990 | 1,133 |
For the first five years, you could count .com domains in the hundreds. The explosion would come later.
Design Decisions That Stuck
Several decisions from 1985 persist today:
Three-Letter Minimum
Generic TLDs were three letters or more. This was to distinguish them from two-letter ccTLDs.
No Registration Restrictions for .com/.net/.org
Unlike .edu/.gov/.mil, the commercial TLDs had no verification requirements. This was intentional — removing friction encouraged adoption.
Hierarchical Naming
Organizations were expected to use subdomains: sales.company.com, mail.company.com. This mimicked organizational structure and followed DNS design principles.
US-Centric Governance
SRI-NIC (and later Network Solutions) was the sole authority. International users had to work through US-based processes. This would become a source of friction as the internet globalized.
What Wasn’t Created
Some TLDs that seem obvious today didn’t exist:
- No .biz, .info, .name — These came in 2001
- No .io, .co, .ai — ccTLDs repurposed for commercial use later
- No geographic TLDs — .nyc, .london came with the 2012 new gTLD program
- No brand TLDs — .google, .amazon are recent additions
The original six plus ccTLDs were considered sufficient. It took decades before new gTLDs were seriously considered.
The .com Prophecy
Jon Postel’s RFC 920 included this prescient paragraph:
“It is expected that .COM will be the TLD of choice for most businesses, though some may prefer to register under their country’s TLD.”
He was right, though even Postel probably couldn’t have predicted that .com would become the most valuable real estate on the internet, with premium domains selling for tens of millions of dollars.
Key Takeaways
- Six original gTLDs launched in 1985: .com, .edu, .gov, .mil, .org, .net
- Each had a specific intended purpose, though only .edu, .gov, and .mil remain restricted
- .com became the dominant TLD, far exceeding original expectations
- Country code TLDs (ccTLDs) were established simultaneously using ISO 3166 codes
- Registration was free and manual until 1995
- The original structure assumed a small, organized internet — assumptions that didn’t survive commercial growth
Next
With TLDs established, someone had to manage registrations. That job fell to Network Solutions, creating a monopoly that would shape — and eventually conflict with — the domain industry’s development.