1. DNS/共用ゾーンサービス/ui-dns

1and1 domainと呼ばれることもある。

Default DNS Settings for 1&1 IONOS Domains

https://www.ionos.com/help/domains/general-information-about-dns-settings/default-dns-settings-for-11-ionos-domains/ 

Name Servers

Every domain that you register for the first time with 1&1 IONOS uses the 1&1 IONOS name servers. For security reasons, 1&1 IONOS spreads the name server assignments across multiple name servers. 1&1 IONOS name servers therefore take the following form:
{{{
Nameserver 1    ns1ZZZ.ui-dns.de
Nameserver 2    ns1ZZZ.ui-dns.biz
Nameserver 3    ns1ZZZ.ui-dns.org
Nameserver 4    ns1ZZZ.ui-dns.com

ZZZ represents a number between 016 and 126.

Domains

See how to use your domains at 1&1 IONOS and manage DNS settings.

https://www.ionos.com/help/domains/

CNAME record

https://www.ionos.com/help/domains/configuring-cname-records-for-subdomains/configuring-a-cname-record-for-a-subdomain/?utm_source=search&utm_medium=global&utm_term=cname%20record&utm_campaign=HELP_CENTER&utm_content=/help/

zoneなしで、CNAMEレコードだけが存在する設定が目立つ。

-- ToshinoriMaeno 2019-10-17 13:42:18