.ntt

What this means

The root zone holds a DS record for .ntt, so the extension is signed and anchored. A domain under .ntt can use DNSSEC with a full chain of trust: it needs to be signed at its DNS host and have its own DS at the registrar. .ntt is a brand extension: only NIPPON TELEGRAPH AND TELEPHONE CORPORATION registers names under it. See popular sites on brand extensions.

IDN names under .ntt

The registry publishes IDN tables at IANA for 1 scripts or languages, so names can use these characters (stored as xn-- in the DNS):

• Japanese (Japan) Language

Length

DNS limits are the same everywhere: each label is 1 to 63 characters, the whole name at most 253, letters, digits and hyphens, not starting or ending with a hyphen. IDN labels count their xn-- form, so fewer native characters fit. A registry can set a higher minimum (often 2 or 3 characters) or reserve short names: that is in its own policy.

WHOIS and RDAP

RDAP (the JSON successor to WHOIS) answers at https://rdap.nic.ntt/rdap/. Classic WHOIS (port 43) answers at whois.nic.ntt. For most gTLD names the owner's contact details are redacted for privacy; the registrar, dates and status are public.

Lifecycle and drop

Names under this extension are held by the brand owner. They are not sold to the public, so there is no public expiry or drop cycle.

Domains we check under .ntt

• global.ntt
• group.ntt

More: Brand

• .obi
• .omega
• .open
• .oracle
• .orange
• .origins
• .otsuka
• .panasonic
• .pccw
• .pfizer
• .philips
• .pictet
• .ping
• .pioneer
• .playstation
• .pnc

All domain extensions →

Learn DNSSEC

• Where DNS came from
• How domain names work
• Domain extensions (TLDs)
• How to enable DNSSEC
• The DS record
• The DNSKEY record
• The RRSIG record
• NSEC and NSEC3
• KSK, ZSK and key rollover
• DNSSEC algorithms
• The AD flag
• DNSSEC troubleshooting