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Method

hosts

The count of hosts that share one root domain and carry at least one detection. One metric of 71 in the registry, 64 of them measured on 12 Sept 2026.

Definition

A host is a distinct root domain and host pair in the crawl, and the root itself is one of them. A host is counted once at least one snapshot of it carries a detection.

Rule

A subdomain is counted on the page of its root and answered on its own page. Each host keeps its own verified date and the root never inherits one, so the freshness on a root page is the freshness of the hosts under it.

Denominator

The 191,888,955 hosts in the landed snapshot, over 169,380,989 root domains.

Caveat

11.9% of hosts are subdomains, and a root that has any averages 2.78 of them, with a median of 1 and a maximum of 1,892,597. The row cap on the domain answer is built for that maximum, not for the median.

Source

Column
Measured
hosts_total
191,888,955
root_domains_total
169,380,989
hosts_sub_share
11.9%
hosts_redirected_share
2.4%

count, measured by jobs/04on tech-domlanded 2026-09-12

The 2 other registry rows this rests on
Metric
What it counts
Share of hosts that are subdomains
Avg subdomains per root among roots with >=1 subdomain

Where it is used

Every metric on the pages you have seen

Metric
Used on
Measured
the domain answer
yes
hosts
the domain answer
yes
the home page
yes
the technology answer and the catalogue
yes
the catalogue
yes
the technology answer
yes
the segment answer
yes
the segment answer
yes
the segment answer
yes
the Grid
yes
the sector answer
yes

11 entries, resting on 23 of the 71 rows in the registry48 more in the registry, of which 41 are measuredregistry landed 12 Sept 2026

This page is built from two CSV files in the repository and calls nothing at request time. Every caption on the site links to an entry here.