TLD 百科 · ドメイン戦略
ドメインブログと TLD 百科
登録前に拡張子を調べます。レジストリ、WHOIS/RDAP、ネームサーバーは公開の IANA ルートゾーンに基づき、購入者とローカル SEO 向けのメモも付けています。
1596
TLD 紹介
1252
gTLD
316
ccTLD
2026-07-22
カタログ日付
About domain extensions
Who runs the registry, WHOIS/RDAP servers, and registration norms.
.aaa
gTLD
American Automobile Association, Inc.
.aarp
gTLD
AARP
.abarth
gTLD
.abb
gTLD
ABB Ltd
.abbott
gTLD
Abbott Laboratories, Inc.
.abbvie
gTLD
AbbVie Inc.
.abc
gTLD
Disney Enterprises, Inc.
.able
gTLD
Able Inc.
.abogado
gTLD
Registry Services, LLC
.abudhabi
gTLD
Abu Dhabi Systems and Information Centre
.ac
ccTLD
Internet Computer Bureau Limited
.academy
gTLD
Binky Moon, LLC
.accenture
gTLD
Accenture plc
.accountant
gTLD
dot Accountant Limited
.accountants
gTLD
Binky Moon, LLC
.aco
gTLD
ACO Severin Ahlmann GmbH & Co. KG
.active
gTLD
.actor
gTLD
Dog Beach, LLC
.ad
ccTLD
Andorra Telecom
.adac
gTLD
.ads
gTLD
Charleston Road Registry Inc.
.adult
gTLD
ICM Registry AD LLC
.ae
ccTLD
Telecommunications and Digital Government Regulatory Authority (TDRA)
.aeg
gTLD
Aktiebolaget Electrolux
Strategy notes
Product updates, naming frameworks, and registrar comparisons. Editorial posts expand alongside the TLD encyclopedia.
Choosing a domain
Practical guide to brandable names, TLDs, and availability.
Domain extensions explained
How gTLDs, ccTLDs, and new extensions differ for founders.
Price comparison
Regular registration, renewal, and transfer prices across registrars.
WHOIS lookup
Live RDAP data plus free status-change email watches.