Skip to main content
DNS Checker(beta)

Domain Name Availability by Length

Domain registration density is the percentage of all possible domain name combinations at a given character length that are already registered. This page analyzes density for 1 to 12 character domain names across 1,436 TLDs and 270.0M domains, updated daily from zone file data.

“258 million domains registered across 1,900+ TLDs. This tool shows where the space is and where it isn't.”

Total Domains Tracked

270.0M

Across all monitored TLDs

TLDs Analyzed

—

Top TLDs by domain count

Lengths Analyzed

1–12 chars

Letters, numbers, hyphens

How Does Domain Scarcity Change by Length?

Each character length has a different scarcity profile. Short domains (1-4 characters) are extremely scarce, while longer names offer vastly more combinations.

1
character
26 combos
(alpha only)
2
characters
676 combos
(alpha only)
3
characters
17.5K combos
(alpha only)
4
characters
456.9K combos
(alpha only)
5
characters
11.8M combos
(alpha only)
6
characters
308.9M combos
(alpha only)
7
characters
8.0B combos
(alpha only)
8
characters
208.8B combos
(alpha only)
9
characters
5429.5B combos
(alpha only)
10
characters
141167.0B combos
(alpha only)
11
characters
3670344.4B combos
(alpha only)
12
characters
95428956.6B combos
(alpha only)

How Saturated Are Three-Letter Domains?

Full analysis

There are 17,576 possible 3-letter alphabetic combinations. Here are the most saturated TLDs.

#TLDRegistered% Full (Alpha)
1.com47,815
>99.9%
2.net43,563
>99.9%
3.xyz39,180
>99.9%
4.org36,309
>99.9%
5.mobi27,661
>99.9%
6.info27,173
>99.9%
7.app22,833
>99.9%
8.ch22,500
>99.9%
9.top22,500
>99.9%
10.se18,216
>99.9%

How Saturated Are Four-Letter Domains?

Full analysis

There are 456,976 possible 4-letter alphabetic combinations. Here are the most saturated TLDs.

#TLDRegistered% Full (Alpha)
1.com1,088,099
>99.9%
2.xyz508,845
>99.9%
3.net307,876
67.4%
4.top304,990
66.7%
5.org260,223
56.9%
6.info108,120
23.7%
7.shop91,732
20.1%
8.vip81,133
17.8%
9.app67,448
14.8%
10.online64,758
14.2%

How Saturated Are Five-Letter Domains?

Full analysis

There are 11,881,376 possible 5-letter alphabetic combinations. Here are the most saturated TLDs.

#TLDRegistered% Full (Alpha)
1.com4,413,547
37.1%
2.top1,949,312
16.4%
3.net593,464
5.0%
4.org539,423
4.5%
5.xyz375,572
3.2%
6.vip331,278
2.8%
7.info322,518
2.7%
8.shop277,407
2.3%
9.app152,521
1.3%
10.bond125,622
1.1%

What Is Domain Registration Density?

Domain registration density measures how many of the possible domain name combinations at a given character length are already registered. For example, there are exactly 17,576 possible three-letter combinations using only the letters a-z. If a TLD has 15,000 three-letter domains registered, its density at that length is 85.3%.

Why Does Length Matter?

The number of possible combinations grows exponentially with each additional character. There are only 26 possible one-letter domains, 676 two-letter domains, but over 308 million possible seven-letter domains. This means short domains are inherently scarce — a TLD can be nearly 100% full at 3 letters while having less than 1% density at 7 letters.

Alpha vs. Alphanumeric Density

DNS Checker calculates density against two baselines: alphabetic-only (26 characters: a-z) and alphanumeric (36 characters: a-z plus 0-9). The alphanumeric space is always larger, so the density percentage is lower. For practical domain investing and availability analysis, alphabetic density is more meaningful since letter-only domains are generally more valuable.

How Is This Data Collected?

This data comes from daily analysis of TLD zone files — the authoritative list of every registered domain under each extension. DNS Checker computes density, character composition (letters only, numbers only, contains hyphens), and DNSSEC adoption rates for every TLD at every character length from 1 to 12.

Frequently Asked Questions

Where Can I Find More Domain Data?

Domain Rankings

See the largest TLDs, top DNS providers, and DNSSEC leaders.

TLD Directory

Browse all 1,900+ TLDs with registration data and pricing.

DNS Security

Security analysis including DNSSEC gaps, typosquatting, and more.

Data updated daily