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Domain zone rules for .nu

On this page you will find detailed information about the general domain name zone rules and contact requirements. A listed set of contact fields is expected at the time of domain name registration or transfer.

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Not supported: CU, IR, KP, SY, SD, RU, BY


RegExp: ^[^,\.;]+$

RegExp: ^[^,\.;]+$
House number

RegExp: ^[^,\.;]+$


Required for countries: US, GB



RegExp: .*

Personal Social number requirements:

  • A personal number is required for registrants from Sweden. For registrants from other countries, a social security number is required.
  • If the registrant provides a Swedish address but wishes to use an ID number issued by another county, the ID number MUST include the two-letter code of the issuing country in square brackets.
    For example, a passport from the Netherlands with the number 12345678 would be recorded as [NL]12345678. For residents of Sweden, do not include the country code; the acceptable format is 123456-7890 (6 digits, dash, 4 digits).
  • If the registrant provides a non-Swedish address, the SSN should be without dashes, example: NL12345678 or 111122222333333

Online tools for check SSN: Swedish SSN or Other Country SSN


Must be empty or not present
Namestore is a virtual bucket for a contact; some domain zones accept any Namestore, while others impose specific value to be provided.

Registry:The IUSN Foundation
Registry admin:[email protected]
Registry tech:[email protected]
Registry WHOIS:whois.iis.nu
Years of registration:1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Renewal years:1, 2, 3, 4, 5, 6, 7, 8, 9
Grace period days:0
Redemption period days:59
Lock supported:No
Nameservers check:No
Maximum hosts:25
IPs per host:1 IPv4 & 1 IPv6
IDN supported:Yes
IDN Tags:
DNSSEC algorithms:6, 8, 10, 12, 13