There are exactly 122,941,842,996,096 possible 9-character domain names — one hundred twenty-two trillion nine hundred forty-one billion eight hundred forty-two million nine hundred ninety-six thousand ninety-six. More possible domains than the total number of emails sent worldwide in an entire year. The nine-character namespace is so large that it could absorb centuries of domain registrations without a dent.
Using letters only (a–z), there are 5,429,503,678,976 possible domains. Over five trillion possibilities — more than the number of web pages indexed by major search engines. At this length, scarcity is essentially nonexistent.
Allowing both letters and digits (a–z, 0–9) creates 101,559,956,668,416 combinations. More combinations than the total number of Google searches performed in an entire year. Finding a specific nine-character domain is like searching for one particular query among a year of global searches.
Here's how saturated each TLD is at this length.
trillion valid combinations
all valid 9-character domain labels (a–z, 0–9, hyphens)
| # | TLD | Registered | % Full (Alpha) |
|---|---|---|---|
| 1 | .com | 6,305,653 | <0.01% |
At 9 characters, the domain namespace becomes vast — 5,429,503,678,976 possible alphabetic combinations. Even the most popular TLDs have significant availability at this length. The challenge shifts from scarcity to finding memorable, meaningful names.
Longer domains are often full words or multi-word combinations. While they lack the premium cachet of short domains, they offer excellent opportunities for keyword-rich, descriptive domain names.
Domain name labels (the part before the dot) follow strict character rules defined in RFC 5891 and RFC 1035. DNSChkr calculates three tiers of possible combinations for each domain length:
Alphabetic (a–z)
269 = 5,429,503,678,976
Only the 26 lowercase letters. The simplest calculation — each position has 26 choices, so 9 positions gives 269.
Alphanumeric (a–z, 0–9)
369 = 101,559,956,668,416
Letters plus digits. Each position has 36 choices. Domain names are case-insensitive, so uppercase and lowercase are equivalent.
All Valid Labels
122,941,842,996,096 total
Includes hyphens, but with restrictions. The total is not simply 379 because hyphens have placement rules.
| Character Set | Characters | Formula | 9-Char Combinations |
|---|---|---|---|
| Alphabetic | a–z (26) | 269 | 5,429,503,678,976 |
| Alphanumeric | a–z, 0–9 (36) | 369 | 101,559,956,668,416 |
| All Valid Labels |
trillion alphabetic
269 using a–z
trillion alphanumeric
369 with digits 0–9
saturation
across 50 TLDs
.com registered
<0.01% of total
| 2 | .net | 1,018,603 | <0.01% |
| 3 | .org | 818,057 | <0.01% |
| 4 | .xyz | 636,362 | <0.01% |
| 5 | .shop | 336,509 | <0.01% |
| 6 | .info | 323,897 | <0.01% |
| 7 | .online | 293,384 | <0.01% |
| 8 | .top | 229,196 | <0.01% |
| 9 | .ch | 201,837 | <0.01% |
| 10 | .store | 201,552 | <0.01% |
| 11 | .site | 153,008 | <0.01% |
| 12 | .se | 123,727 | <0.01% |
| 13 | .vip | 112,654 | <0.01% |
| 14 | .app | 108,497 | <0.01% |
| 15 | .pro | 103,479 | <0.01% |
| 16 | .biz | 88,617 | <0.01% |
| 17 | .sbs | 56,763 | <0.01% |
| 18 | .space | 48,046 | <0.01% |
| 19 | .dev | 47,458 | <0.01% |
| 20 | .tech | 46,900 | <0.01% |
| 21 | .cloud | 44,807 | <0.01% |
| 22 | .club | 43,134 | <0.01% |
| 23 | .live | 41,839 | <0.01% |
| 24 | .cfd | 40,316 | <0.01% |
| 25 | .click | 36,878 | <0.01% |
| 26 | .world | 29,996 | <0.01% |
| 27 | .life | 27,973 | <0.01% |
| 28 | .art | 23,645 | <0.01% |
| 29 | .bond | 21,417 | <0.01% |
| 30 | .cyou | 20,440 | <0.01% |
| 31 | .blog | 18,418 | <0.01% |
| 32 | .nu | 17,630 | <0.01% |
| 33 | .icu | 17,475 | <0.01% |
| 34 | .asia | 17,301 | <0.01% |
| 35 | .website | 17,180 | <0.01% |
| 36 | .fun | 16,938 | <0.01% |
| 37 | .work | 16,840 | <0.01% |
| 38 | .digital | 15,301 | <0.01% |
| 39 | .skin | 14,565 | <0.01% |
| 40 | .mobi | 13,875 | <0.01% |
| 41 | .studio | 13,642 | <0.01% |
| 42 | .one | 12,313 | <0.01% |
| 43 | .lol | 11,918 | <0.01% |
| 44 | .link | 10,266 | <0.01% |
| 45 | .run | 9,167 | <0.01% |
| 46 | .bet | 8,745 | <0.01% |
| 47 | .buzz | 7,967 | <0.01% |
| 48 | .solutions | 7,426 | <0.01% |
| 49 | .autos | 7,272 | <0.01% |
| 50 | .today | 7,154 | <0.01% |
| a–z, 0–9, hyphen (37) |
| With placement rules |
| 122,941,842,996,096 |
Hyphen Placement Rules
xn--example are reserved for internationalized domain names (IDN) under RFC 5891 §4.2.3.1. A hyphen in position 3 and position 4 simultaneously is not permitted in standard registrations.These constraints mean the "all valid" count is less than a simple 36 × 37^7 × 36 calculation — the double-hyphen exclusion at positions 3–4 removes a subset of otherwise valid combinations. All three counts are mathematical constants that never change — only the number of registered domains (shown in the table above) changes daily.