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Domain report

undercurrent.org

undercurrent.org ranks in the top 0.43% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 3 distinct hosts observed under it.

Explore undercurrent.org in the Web Graph

Connectivity

#578,955harmonic-centrality rank
Top percentile
0.43%
Hosts observed
3

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

HTTPS reachability

200HTTP status

https://undercurrent.org/ answered with HTTP 200.

Certificate until 2026-12-12C=US, O=Let's Encrypt, CN=YR1

DNS records

A
  • 199.167.131.28
AAAA
No records found.
MX
  • 1000 undercurrent.org.
  • 0 cloud3.spamtitan.com.
  • 0 cloud4.spamtitan.com.
NS
  • ns.scuba-divers.org.
  • ns2.scuba-divers.org.
AS
Server in network ESTRUXTURE-ON-19122, AS19122 · Canada199.167.131.0/24, which holds 199.167.131.28

Live preview

This is a live, sandboxed embed of undercurrent.org — not a copy. What it shows can change any time the site itself does.

Domain registration (WHOIS / RDAP)

Registrar
Squarespace Domains II LLC
Registered
1998-03-24
Expires
2027-03-23
Last changed
2026-08-12

Nameservers: ns.scuba-divers.org, ns2.scuba-divers.org

Status: client delete prohibited, client transfer prohibited

How to read WHOIS and RDAP data

SSL certificate

Common name
undercurrent.org
Issuer
C=US, O=Let's Encrypt, CN=YR1
Valid from
2026-09-13
Valid until
2026-12-12

Matches undercurrent.org exactly. Source: Certificate Transparency logs (crt.sh).

How to check when a certificate expires

HTTP & security headers

Response

Server
cloudflare
Content-Type
text/html; charset=ISO-8859-1
Cache-Control
Not sent
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
Not sent
X-Frame-Options
Not sent
X-Content-Type-Options
Not sent
Referrer-Policy
Not sent
Permissions-Policy
Not sent

What each security header does

Redirect chain

  1. 1.http://undercurrent.org/HTTP 301

    → https://undercurrent.org/

  2. 2.https://undercurrent.org/HTTP 301

    → https://www.undercurrent.org/

  3. 3.https://www.undercurrent.org/HTTP 200

Meta tags

Title
Scuba Diving Magazine, Undercurrent Reviews Liveaboards, Dive Resorts & Dive Gear
Description
Since 1975, Undercurrent, 'the Consumer Reports of diving' by Business Week, provides authoritative, unbiased reviews of liveaboards, dive resorts, and dive gear.
Canonical
https://www.undercurrent.org
Robots
Not set
Generator
Not set
Open Graph title
Undercurrent, Consumer Reporting for Serious Divers Since 1975
Open Graph description
Undercurrent, published since 1975, called 'the Consumer Reports of diving' by Business Week, provides authoritative, unbiased, well-organized reviews of scuba diving liveaboards, resorts, and dive gear. We're a dive magazine providing timely information as well as access to back issues and thousands of easy-to-find reports.
Open Graph image
//UCnow/images/magcover_lg.jpg
Open Graph type
website
Twitter card
Not set
Twitter title
Not set
Twitter image
Not set

robots.txt

Disallow rules (User-agent: *)
128
Disallow rules (other agents)
164

Sitemap declared:

  • https://www.undercurrent.org/sitemap.xml.gz

Technology detected

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

  • Cloudflarecdn

    Server: cloudflare

  • Google Analyticsanalytics

    Found "googletagmanager.com/gtag/js" in the page's HTML

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