Domain report

o2.com

o2.com ranks in the top 0.52% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 24 distinct hosts observed under it.

Explore o2.com in the Web Graph

Connectivity

#688,085harmonic-centrality rank

Top percentile: 0.52%
Hosts observed: 24

From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means

HTTPS reachability

526HTTP status

https://o2.com/ answered with HTTP 526.

DNS records

A: 20.162.150.90
AAAA: No records found.
MX: 10 dmmlw-seg-01.o2.com.
10 dmmlw-seg-02.o2.com.
10 dmell-seg-03.o2.com.
10 dmell-seg-04.o2.com.
NS: n1.02.net.
n4.02.net.
n3.02.net.
n2.02.net.

Live preview

This site sends "X-Frame-Options: SAMEORIGIN", which blocks embedding it here.

Since o2.com can't be embedded live, this is a captured screenshot instead — a snapshot from whenever it was last rendered, not necessarily this exact moment.

Domain registration (WHOIS / RDAP)

RDAP lookup failed (HTTP 429).

How to read WHOIS and RDAP data

SSL certificate

Certificate Transparency lookup failed (HTTP 429).

How to check when a certificate expires

HTTP & security headers

Response

Server: cloudflare
Content-Type: text/plain; charset=UTF-8
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Content-Encoding: Not sent

Security

Content-Security-Policy: Not sent
Strict-Transport-Security: Not sent
X-Frame-Options: SAMEORIGIN
X-Content-Type-Options: Not sent
Referrer-Policy: same-origin
Permissions-Policy: Not sent

What each security header does

Redirect chain

1.http://o2.com/HTTP 301
→ https://www.o2.co.uk/
2.https://www.o2.co.uk/HTTP 200

robots.txt

robots.txt request failed (HTTP 526).

Technology detected

Best-effort, based on a small set of well-known signals — this may be incomplete.

Cloudflarecdn
Server: cloudflare

Similar connectivity

Domains ranked just above and below it in the same snapshot.