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 1,936 TLDs and 266.1M domains, updated daily from zone file data.
Total Domains Tracked
266.1M
Across all monitored TLDs
TLDs Analyzed
—
Top TLDs by domain count
Lengths Analyzed
1–12 chars
Letters, numbers, hyphens
Each character length has a different scarcity profile. Short domains (1-4 characters) are extremely scarce, while longer names offer vastly more combinations.
There are 17,576 possible 3-letter alphabetic combinations. Here are the most saturated TLDs.
| # | TLD | Registered | % Full (Alpha) |
|---|---|---|---|
| 1 | .net | 42,326 | >99.9% |
| 2 |
There are 456,976 possible 4-letter alphabetic combinations. Here are the most saturated TLDs.
| # | TLD | Registered | % Full (Alpha) |
|---|---|---|---|
| 1 | .com | 542,651 | >99.9% |
| 2 |
There are 11,881,376 possible 5-letter alphabetic combinations. Here are the most saturated TLDs.
| # | TLD | Registered | % Full (Alpha) |
|---|---|---|---|
| 1 | .com | 2,233,774 | 18.8% |
| 2 |
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%.
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.
DNSChkr 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.
This data comes from daily analysis of TLD zone files — the authoritative list of every registered domain under each extension. DNSChkr 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.
| .org |
| 33,450 |
>99.9% |
| 3 | .xyz | 28,726 | >99.9% |
| 4 | .info | 24,309 | >99.9% |
| 5 | .com | 23,163 | >99.9% |
| 6 | .ch | 22,270 | >99.9% |
| 7 | .top | 21,579 | >99.9% |
| 8 | .se | 18,081 | >99.9% |
| 9 | .app | 17,746 | >99.9% |
| 10 | .mobi | 17,410 | 99.1% |
| .xyz |
| 377,927 |
82.7% |
| 3 | .net | 294,114 | 64.4% |
| 4 | .top | 276,745 | 60.6% |
| 5 | .org | 243,916 | 53.4% |
| 6 | .info | 97,590 | 21.4% |
| 7 | .shop | 86,095 | 18.8% |
| 8 | .vip | 75,483 | 16.5% |
| 9 | .ch | 62,881 | 13.8% |
| 10 | .online | 55,236 | 12.1% |
| .top |
| 1,680,911 |
14.2% |
| 3 | .net | 562,655 | 4.7% |
| 4 | .org | 502,626 | 4.2% |
| 5 | .vip | 293,693 | 2.5% |
| 6 | .info | 293,074 | 2.5% |
| 7 | .xyz | 276,137 | 2.3% |
| 8 | .shop | 254,339 | 2.1% |
| 9 | .app | 114,685 | 0.97% |
| 10 | .online | 107,051 | 0.90% |