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 275.3M 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
275.3M
Across all monitored TLDs
TLDs Analyzed
10
Top TLDs by domain count
Most Saturated
.com (2-letter)
>99.9% of alpha names taken
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.
Which TLDs Are Most Saturated at Each Length?
How full is each TLD at each domain length? Colors indicate the percentage of possible alphabetic combinations that are already registered.
| TLD | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| .com | 11.5% | >99.9% | >99.9% | >99.9% | 38.9% | 2.9% | 0.13% | 0.01% | <0.01% | <0.01% | <0.01% | <0.01% |
| .net | 7.7% | >99.9% | >99.9% | 70.7% | 5.3% | 0.29% | 0.01% | <0.01% | <0.01% | <0.01% | <0.01% | <0.01% |
| .top | 84.6% | 38.6% | >99.9% | 76.8% | 20.1% | 0.68% | 0.01% | <0.01% | <0.01% | <0.01% | <0.01% | <0.01% |
| .xyz | >99.9% | >99.9% | >99.9% | >99.9% | 4.3% | 0.24% | 0.01% | <0.01% | <0.01% | <0.01% | <0.01% | <0.01% |
| .org | >99.9% | >99.9% | >99.9% | 59.5% | 4.8% | 0.22% | 0.01% | <0.01% | <0.01% | <0.01% | <0.01% | <0.01% |
| .info | 73.1% | 9.2% | >99.9% | 24.8% | 2.8% | 0.22% | 0.01% | <0.01% | <0.01% | <0.01% | <0.01% | <0.01% |
| .shop | — | 6.7% | 57.1% | 23.9% | 2.7% | 0.16% | 0.01% | <0.01% | <0.01% | <0.01% | <0.01% | <0.01% |
| .online | 3.9% | 7.3% | 51.4% | 15.9% | 1.2% | 0.08% | <0.01% | <0.01% | <0.01% | <0.01% | <0.01% | <0.01% |
| .vip | >99.9% | >99.9% | 74.2% | 19.8% | 3.2% | 0.20% | <0.01% | <0.01% | <0.01% | <0.01% | <0.01% | <0.01% |
| .store | 11.5% | 5.9% | 29.1% | 10.1% | 0.84% | 0.05% | <0.01% | <0.01% | <0.01% | <0.01% | <0.01% | <0.01% |
How Saturated Are Three-Letter Domains?
Full analysisThere are 17,576 possible 3-letter alphabetic combinations. Here are the most saturated TLDs.
How Saturated Are Four-Letter Domains?
Full analysisThere are 456,976 possible 4-letter alphabetic combinations. Here are the most saturated TLDs.
How Saturated Are Five-Letter Domains?
Full analysisThere are 11,881,376 possible 5-letter alphabetic combinations. Here are the most saturated TLDs.
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.