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 378K+ 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 47 995 domains at that length. The average length is 7.71 characters, while the maximum allowed is 63. A representative domain like 000webhost.io (10 chars) illustrates typical naming patterns.

Infographics for .io

377,951
Total Domains
+0
New Today
−0
Dropped Today

Domain length distribution by number of characters

Character Composition: Letters, Digits, and Hyphens

Pure letter domains dominate at 94.46% (357 031 domains). Domains mixing digits and letters account for 2.92%, while purely numeric domains are rare at 0.45%. Hyphen usage is minimal, with 2.17% of domains containing a hyphen.


Average domain name length

7.71 characters
Representative domain: 000webhost.io
Representative name length: 10

Most Frequent Symbols and Words in .io Domains

The most common character overall is 'e' (appearing 297 386 times), and the most frequent first character is 's' (37 492 domains). The top embedded word is 'go', found in 5 828 domains (1.54% share).

Popular Domain Zones

.us .services .kr .green .network .radio .education .energy .tech .art .company .blog .com .social .farm .solar .house .beauty .co .org

Character frequency in domain names

# Symbol Occurrences
1 e 297386
2 a 253817
3 o 210239
4 i 205511
5 t 204081
6 r 195419
7 s 178026
8 n 168925
9 l 145981
10 c 133871
11 d 101803
12 p 95828
13 m 91186
14 u 86314
15 h 74889
16 b 73138
17 g 67851
18 y 58067
19 k 54483
20 f 46786
21 v 41074
22 w 36568
23 x 24489
24 z 16158
25 j 12313
26 q 8955
27 1 3349
28 2 3345
29 3 3184
30 0 2878
31 4 2258
32 8 1947
33 6 1656
34 5 1419
35 9 1332
36 7 1283

Vowel vs. Consonant Balance in .io

Domains in .io contain 1 111 334 vowels (38.13%) and 1 771 824 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 0 405
3 1 1075
4 2 592
5 3 703
6 4 530
7 5 341
8 6 241
9 7 291
10 8 356
11 9 312
12 a 24751
13 b 22972
14 c 31274
15 d 19577
16 e 14222
17 f 14401
18 g 14744
19 h 12158
20 i 13186
21 j 6178
22 k 8900
23 l 13255
24 m 23599
25 n 11264
26 o 9870
27 p 20785
28 q 3287
29 r 14690
30 s 37492
31 t 22279
32 u 5113
33 v 8690
34 w 10734
35 x 2768
36 y 2989
37 z 3927

Numeric Tokens and Their Role in .io

The most frequent numeric token is '2', appearing in 1 678 domains. Numeric elements can enhance domain uniqueness but are less common than alphabetic patterns.


Character distribution in domain names

Vowels (1111334 · 38.13%)
Consonants (1771824 · 60.79%)
Digits (22651 · 0.78%)
Hyphen (8832 · 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 (377 951), average length, and character composition helps investors spot trends and assess domain value.


Domain names with numbers and letters

Only numbers (1683 · 0.45%)
Only letters (357031 · 94.46%)
Numbers and letters (11041 · 2.92%)
Other (8196 · 2.17%)

Actionable Insights for Domain Investors and SEOs

With 378K+ domains and a strong preference for short, letter-only names, .io offers opportunities in premium short domains. The low hyphen usage (2.17%) suggests clean, brandable names are highly valued.


Most frequent word fragments inside domain names

# Word Domains count %
1 go 5828 1.54
2 pro 5089 1.35
3 lab 4870 1.29
4 app 4789 1.27
5 tech 4146 1.10
6 one 3816 1.01
7 my 3680 0.97
8 cloud 3284 0.87
9 car 3050 0.81
10 net 3045 0.81
11 data 2968 0.79
12 dev 2525 0.67
13 get 2252 0.60
14 web 2038 0.54
15 pay 1946 0.51
16 smart 1794 0.47
17 hub 1719 0.45
18 box 1658 0.44
19 star 1503 0.40
20 game 1327 0.35

Trends & Insights 2026

The .io zone continues to grow, with 378K+ domains registered, reflecting sustained demand from tech and startup sectors.
Short domains (6 characters) are the most popular, with 47 995 domains, indicating a premium on brevity and memorability.
Pure letter domains dominate at 94.46%, while mixed digit-letter domains are niche (2.92%), suggesting investors should focus on alphabetic names.
The top word 'go' appears in 5 828 domains (1.54%), highlighting a trend toward action-oriented or common verbs in domain names.
Hyphen usage remains low (2.17%), 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 (8196 · 2.17%)
Without hyphen (369755 · 97.83%)

Popular numeric tokens in domain names

# Token Domains count
1 2 1678
2 3 1494
3 1 1069
4 4 1065
5 8 748
6 0 575
7 5 435
8 7 435
9 360 428
10 9 376
11 6 254
12 10 206
13 24 169
14 365 144
15 42 138
16 11 100
17 21 94
18 12 77
19 20 77
20 88 76