Useful Information

.io Domain Zone: Comprehensive Data & Trends for 2026

The .io domain zone, originally assigned to the British Indian Ocean Territory, has evolved into a premier choice for tech startups, SaaS companies, and developers worldwide. With 374.4K+ registered domains, .io remains a highly sought-after extension. Understanding its structural metrics—such as average domain length (7.71 characters), character composition, and naming patterns—is crucial for domain investors and SEO professionals. This data-driven analysis provides actionable insights into the .io landscape, helping you identify valuable opportunities and optimize your digital strategy for 2026.

Domain Length Distribution in .io

The most common domain length is 6 characters, with 47 583 domains at that length. The average length is 7.71 characters, while the maximum allowed is 63. A representative domain like 0-0.io (3 chars) illustrates typical naming patterns.

Infographics for .io

374,352
Total Domains
+0
New Today
−14,170
Dropped Today

Domain length distribution by number of characters

Character Composition: Letters, Digits, and Hyphens

Pure letter domains dominate at 94.47% (353 669 domains). Domains mixing digits and letters account for 2.92%, while purely numeric domains are rare at 0.44%. Hyphen usage is minimal, with 2.16% of domains containing a hyphen.


Average domain name length

7.71 characters
Representative domain: 0-0.io
Representative name length: 3

Most Frequent Symbols and Words in .io Domains

The most common character overall is 'e' (appearing 294 362 times), and the most frequent first character is 's' (37 101 domains). The top embedded word is 'go', found in 5 759 domains (1.54% share).

Popular Domain Zones

.fun .clinic .forum .ltd .law .menu .inc .io .info .music .team .bar .me .chat .pet .game .solar .app .fr .vacations

Character frequency in domain names

# Symbol Occurrences
1 e 294362
2 a 251336
3 o 208110
4 i 203435
5 t 201933
6 r 193520
7 s 176194
8 n 167154
9 l 144496
10 c 132514
11 d 100854
12 p 94851
13 m 90289
14 u 85461
15 h 74132
16 b 72354
17 g 67194
18 y 57418
19 k 53970
20 f 46298
21 v 40671
22 w 36167
23 x 24261
24 z 15994
25 j 12201
26 q 8873
27 1 3315
28 2 3308
29 3 3163
30 0 2840
31 4 2235
32 8 1928
33 6 1639
34 5 1399
35 9 1319
36 7 1263

Vowel vs. Consonant Balance in .io

Domains in .io contain 1 100 122 vowels (38.13%) and 1 753 920 consonants (60.79%), with digits making up 0.78% and hyphens 0.30%. This balance affects memorability and brandability.


Most common first character in domain names

# First char Domains count
1 - 0
2 0 402
3 1 1064
4 2 586
5 3 700
6 4 526
7 5 333
8 6 236
9 7 288
10 8 352
11 9 309
12 a 24555
13 b 22706
14 c 30967
15 d 19404
16 e 14098
17 f 14251
18 g 14596
19 h 12050
20 i 13079
21 j 6129
22 k 8817
23 l 13131
24 m 23384
25 n 11161
26 o 9785
27 p 20589
28 q 3260
29 r 14564
30 s 37101
31 t 22052
32 u 5057
33 v 8619
34 w 10620
35 x 2743
36 y 2945
37 z 3893

Numeric Tokens and Their Role in .io

The most frequent numeric token is '2', appearing in 1 658 domains. Numeric elements can enhance domain uniqueness but are less common than alphabetic patterns.


Character distribution in domain names

Vowels (1100122 · 38.13%)
Consonants (1753920 · 60.79%)
Digits (22409 · 0.78%)
Hyphen (8717 · 0.3%)
Other (0 · 0%)

Historical Context of .io and Why Statistics Matter

Originally a ccTLD for the British Indian Ocean Territory, .io gained popularity as a generic TLD for tech and innovation. Tracking metrics like total domains (374 352), average length, and character composition helps investors spot trends and assess domain value.


Domain names with numbers and letters

Only numbers (1657 · 0.44%)
Only letters (353669 · 94.47%)
Numbers and letters (10939 · 2.92%)
Other (8087 · 2.16%)

Actionable Insights for Domain Investors and SEOs

With 374.4K+ domains and a strong preference for short, letter-only names, .io offers opportunities in premium short domains. The low hyphen usage (2.16%) suggests clean, brandable names are highly valued.


Most frequent word fragments inside domain names

# Word Domains count %
1 go 5759 1.54
2 pro 5029 1.34
3 lab 4831 1.29
4 app 4746 1.27
5 tech 4115 1.10
6 one 3770 1.01
7 my 3635 0.97
8 cloud 3261 0.87
9 car 3027 0.81
10 net 3013 0.80
11 data 2941 0.79
12 dev 2512 0.67
13 get 2223 0.59
14 web 2018 0.54
15 pay 1923 0.51
16 smart 1775 0.47
17 hub 1700 0.45
18 box 1642 0.44
19 star 1481 0.40
20 game 1315 0.35

Trends & Insights 2026

The .io zone continues to grow, with 374.4K+ domains registered, reflecting sustained demand from tech and startup sectors.
Short domains (6 characters) are the most popular, with 47 583 domains, indicating a premium on brevity and memorability.
Pure letter domains dominate at 94.47%, while mixed digit-letter domains are niche (2.92%), suggesting investors should focus on alphabetic names.
The top word 'go' appears in 5 759 domains (1.54%), highlighting a trend toward action-oriented or common verbs in domain names.
Hyphen usage remains low (2.16%), reinforcing that clean, hyphen-free domains are preferred for branding and SEO.
Character composition shows a vowel-consonant ratio of 38.13% vowels to 60.79% consonants, which can influence domain pronounceability and recall.

Hyphen usage in domain names

With hyphen (8087 · 2.16%)
Without hyphen (366265 · 97.84%)

Popular numeric tokens in domain names

# Token Domains count
1 2 1658
2 3 1480
3 1 1058
4 4 1056
5 8 743
6 0 571
7 7 433
8 5 430
9 360 425
10 9 372
11 6 252
12 10 203
13 24 167
14 365 144
15 42 137
16 11 99
17 21 94
18 12 76
19 20 76
20 88 74