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second-level domain

domain that is directly below a top-level domain
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second-level domain

Summary

second-level domain ranks in the top 2% of general entities by monthly Wikipedia readership (507 views/month).[1]

Key Facts

  • second-level domain followed top-level domain[2].
  • second-level domain was followed by third-level domain[3].
  • second-level domain is a type of domain name[4].
  • second-level domain comprises country code second-level domain[5].
  • second-level domain's topic's main category is recorded as Category:Second-level domains[6].
  • second-level domain's described by source is recorded as RFC 920: Domain requirements[7].
  • second-level domain's described by source is recorded as RFC 1386: The US Domain[8].
  • second-level domain's described by source is recorded as RFC 1480: The US Domain[9].
  • second-level domain's described by source is recorded as RFC 2606: Reserved Top Level DNS Names[10].
  • second-level domain's described by source is recorded as RFC 6927: Variants in Second-Level Names Registered in Top-Level Domains[11].
  • second-level domain's next lower rank is recorded as third-level domain[12].
  • second-level domain's next higher rank is recorded as top-level domain[13].

Body

Definition and Type

second-level domain is a type of domain name[4].

Use and Application

second-level domain comprises country code it[5].

Why It Matters

second-level domain ranks in the top 2% of general entities by monthly Wikipedia readership (507 views/month).[1] It has Wikipedia articles in 16 language editions, a strong signal of global cultural recognition.[14] It is known by 16 alternative names across languages and contexts.[15]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . icannwiki.org. icannwiki.org. Provenance: wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . wikidata.org.
  9. [10] ↑ . wikidata.org.
  10. [11] ↑ . wikidata.org.
  11. [12] ↑ . wikidata.org.
  12. [13] ↑ . wikidata.org.

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [14] ↑ . Wikidata sitelinks. wikidata.org.
  3. [15] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). second-level domain. Retrieved April 10, 2026, from https://4ort.xyz/entity/second-level-domain
MLA “second-level domain.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/second-level-domain.
BibTeX @misc{4ortxyz_second-level-domain_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{second-level domain}}, year = {2026}, url = {https://4ort.xyz/entity/second-level-domain}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): second-level domain — https://4ort.xyz/entity/second-level-domain (retrieved 2026-04-10)

Canonical URL: https://4ort.xyz/entity/second-level-domain · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 1d ago · Trivialist · 2026-05-23 view diff on Wikidata ↗
    Has part(s) → country code second-level domain
    Subclass of → —
    Has parts → —
    Follows → top-level domain
    + 9 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-references:1||1|1 */ [[Property:P910]]: [[Q8725663]], Cleanup: remove wikimedia refs ([[User:Difool/WikidataCleanup]])"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.