Five-Character Domain Availability

Name: Five-Character Domain Registration Density
Creator: Ishan Karunaratne

There are exactly 65,598,336 possible 5-character domain names, sixty-five million five hundred ninety-eight thousand three hundred thirty-six. About as many possible domains as there are books that have ever been published in all of human history. A vast-sounding number, but one that popular TLDs are steadily filling.

Using letters only (a–z), there are 11,881,376 possible domains. Roughly the number of distinct articles on English Wikipedia. A large collection, but entirely countable, and heavily claimed in top TLDs.

Allowing both letters and digits (a–z, 0–9) creates 60,466,176 combinations. If each combination were a page, you could fill a library with over 120,000 five-hundred-page books. This is the last length where popular TLDs face real saturation pressure.

Here's how saturated each TLD is at this length.

Analysis by Ishan Karunaratne

Data updated daily. Last snapshot: July 10, 2026

million valid combinations

all valid 5-character domain labels (a–z, 0–9, hyphens)

million alphabetic

26⁵ using a–z

million alphanumeric

36⁵ with digits 0–9

saturation

across 50 TLDs

.com registered

38.9% of total

Which TLDs Are Most Saturated at 5 Characters?

How Full Is Each TLD at 5 Characters?

#	TLD	Registered	% Full (Alpha)	% Full (Alphanum)	Hyphenated	Numeric Only	DNSSEC %	Status
1	.com	4,620,725	38.9%	7.6%	—	95,937	2.4%	Widely Available
2	.top	2,390,033	20.1%	4.0%	—	39,235	0.6%	Widely Available
3	.net	626,635	5.3%	1.0%	—	28,548	4.7%	Largely Open
4	.org	569,094	4.8%	0.94%	—	26,452	5.8%	Largely Open
5	.xyz	516,632	4.3%	0.85%	—	31,733	1.9%	Largely Open
6	.vip	383,729	3.2%	0.63%	—	92,792	1.3%	Largely Open
7	.info	332,505	2.8%	0.55%	32,591	1,571	3.1%	Largely Open
8	.shop	315,513	2.7%	0.52%	—	5,762	21.8%	Largely Open
9	.app	187,690	1.6%	0.31%	1,738	17,020	5.1%	Largely Open
10	.online	142,382	1.2%	0.24%	—	725	4.0%	Largely Open
11	.bond	128,683	1.1%	0.21%	—	694	2.9%	Largely Open
12	.sbs	123,007	1.0%	0.20%	—	14,915	3.2%	Largely Open
13	.pro	102,173	0.86%	0.17%	—	7,192	8.2%	Largely Open
14	.biz	102,118	0.86%	0.17%	—	7,030	3.3%	Largely Open
15	.site	100,605	0.85%	0.17%	—	844	2.6%	Largely Open
16	.store	100,109	0.84%	0.17%	—	453	3.3%	Largely Open
17	.ch	96,256	0.81%	0.16%	—	216	51.6%	Largely Open
18	.icu	86,318	0.73%	0.14%	—	—	1.1%	Largely Open
19	.cyou	84,934	0.71%	0.14%	—	—	8.3%	Largely Open
20	.lol	84,767	0.71%	0.14%	—	535	1.9%	Largely Open
21	.dev	74,026	0.62%	0.12%	921	157	15.2%	Largely Open
22	.mobi	67,635	0.57%	0.11%	—	—	7.7%	Largely Open
23	.link	67,324	0.57%	0.11%	—	—	3.0%	Largely Open
24	.se	66,541	0.56%	0.11%	—	356	58.1%	Largely Open
25	.asia	65,010	0.55%	0.11%	—	—	3.6%	Largely Open
26	.club	62,623	0.53%	0.10%	—	—	3.5%	Largely Open
27	.tech	57,354	0.48%	0.09%	—	—	5.9%	Largely Open
28	.one	55,638	0.47%	0.09%	—	—	8.1%	Largely Open
29	.click	50,778	0.43%	0.08%	—	—	2.1%	Largely Open
30	.cloud	50,670	0.43%	0.08%	—	—	7.9%	Largely Open
31	.qpon	49,665	0.42%	0.08%	—	—	0.0%	Largely Open
32	.blog	48,664	0.41%	0.08%	—	—	2.5%	Largely Open
33	.loan	45,327	0.38%	0.07%	—	—	0.7%	Largely Open
34	.fun	42,007	0.35%	0.07%	—	—	3.0%	Largely Open
35	.live	41,173	0.35%	0.07%	—	—	3.8%	Largely Open
36	.cfd	39,483	0.33%	0.07%	—	—	6.9%	Largely Open
37	.space	38,067	0.32%	0.06%	—	—	4.5%	Largely Open
38	.life	36,734	0.31%	0.06%	—	—	2.6%	Largely Open
39	.bid	32,809	0.28%	0.05%	—	—	0.2%	Largely Open
40	.work	31,922	0.27%	0.05%	—	—	2.4%	Largely Open
41	.win	27,797	0.23%	0.05%	—	—	5.5%	Largely Open
42	.bet	26,013	0.22%	0.04%	—	—	1.2%	Largely Open
43	.town	25,447	0.21%	0.04%	—	—	0.8%	Largely Open
44	.world	24,841	0.21%	0.04%	—	—	4.2%	Largely Open
45	.buzz	22,710	0.19%	0.04%	—	—	5.2%	Largely Open
46	.art	22,137	0.19%	0.04%	—	—	7.6%	Largely Open
47	.studio	21,875	0.18%	0.04%	—	—	9.9%	Largely Open
48	.digital	18,276	0.15%	0.03%	—	—	5.5%	Largely Open
49	.website	16,679	0.14%	0.03%	—	—	3.2%	Largely Open
50	.wiki	16,606	0.14%	0.03%	—	—	3.7%	Largely Open

What Are Five-Character Domain Names Worth?

At five characters the namespace passes eleven million combinations and real words begin to appear in volume. This is the practical sweet spot for a startup that still wants a sayable, brandable name, with names like Slack and Vimeo sitting in this band.

Dictionary words and clean five-letter patterns hold their value; random strings do not. Many TLDs still have meaningful availability here, which makes it the first length where patience beats budget.

Explore Five-Character Availability by TLD

How Are These Combination Counts Calculated?

Domain name labels (the part before the dot) follow strict character rules defined in RFC 5891 and RFC 1035. DNS Checker calculates three tiers of possible combinations for each domain length:

Alphabetic (a–z)

26⁵ = 11,881,376

Only the 26 lowercase letters. The simplest calculation, each position has 26 choices, so 5 positions gives 26⁵.

Alphanumeric (a–z, 0–9)

36⁵ = 60,466,176

Letters plus digits. Each position has 36 choices. Domain names are case-insensitive, so uppercase and lowercase are equivalent.

All Valid Labels

65,598,336 total

Includes hyphens, but with restrictions. The total is not simply 37⁵ because hyphens have placement rules.

Character Set	Characters	Formula	5-Char Combinations
Alphabetic	a–z (26)	26⁵	11,881,376
Alphanumeric	a–z, 0–9 (36)	36⁵	60,466,176
All Valid Labels	a–z, 0–9, hyphen (37)	With placement rules	65,598,336

Hyphen Placement Rules

No leading hyphen, the first character must be a letter or digit (36 choices, not 37)
No trailing hyphen, the last character must also be a letter or digit (36 choices)
No double-hyphen at positions 3–4, labels like 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 × 37^3 × 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.

Frequently Asked Questions

Data updated daily. Last snapshot: July 10, 2026

Five-Character Domain Availability

Which TLDs Are Most Saturated at 5 Characters?

How Full Is Each TLD at 5 Characters?

What Are Five-Character Domain Names Worth?

Explore Five-Character Availability by TLD

How Are These Combination Counts Calculated?

Frequently Asked Questions

How many possible 5-character domain names exist?

Are 5-character domains valuable?

Which TLDs still have 5-character domains available?

What does the DNSSEC percentage mean for 5-character domains?

How many 5-character domains are registered across all TLDs?

What is the difference between alphabetic and alphanumeric domain combinations?

Where can I find available 5-character domain names?