What technology does is-a.dev use?

We did not detect any specific technologies for is-a.dev in the latest scan.

Is is-a.dev secure (HTTPS)?

Yes. is-a.dev uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 21, 2026.

is-a.dev is hosted on Fastly, behind Fastly CDN.

What is is-a.dev's SEO score?

is-a.dev scored 65/100 for SEO in the latest analysis (fair).

What is is-a.dev's overall website score?

is-a.dev has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.

is-a.dev

is-a.dev - Free subdomains for developers

Last scanned Jul 27, 2026, 2:43 PM

Overall score

Fair

Summary

A service to allow developers to get free `.is-a.dev` subdomains. This website is hosted on Fastly. SEO is fair (65/100) and accessibility is good (80/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing canonical link.

A service to allow developers to get free `.is-a.dev` subdomains

United States

Hosted on Fastly

Top issues to fix

10 issues found · 3 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEO
Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.

+4 more issues — details in the sections below.

SEO

5 issue(s) found

100

Performance

229 ms

Security

HTTPS & header checks

Accessibility

2 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

A service to allow developers to get free `.is-a.dev` subdomains

Contact

Email, phone, and address published on this site's own pages.

Email: admin@is-a.dev

Meta tags

Title: is-a.dev - Free subdomains for developers
Description: A service to allow developers to get free `.is-a.dev` subdomains
Canonical
Language
Charset: utf-8
Viewport: width=device-width, initial-scale=1, shrink-to-fit=no
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: Fastly
CDN provider: Fastly
IP address: 185.199.110.153
ASN: AS54113 (FASTLY - Fastly, Inc., US)

DNS records

Type	Value
A	185.199.110.153 185.199.109.153 185.199.108.153 185.199.111.153
AAAA	2606:50c0:8002::153 2606:50c0:8003::153 2606:50c0:8000::153 2606:50c0:8001::153
MX	route2.mx.cloudflare.net route3.mx.cloudflare.net route1.mx.cloudflare.net
TXT	v=spf1 include:_spf.mx.cloudflare.net ~all
NS	ns1.is-a.dev ns3.is-a.dev ns4.is-a.dev ns2.is-a.dev
CAA	—
CNAME	—
IPv6 support	Yes

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: is-a.dev
Valid from: Jul 23, 2026
Valid to: Oct 21, 2026
Days until expiry: 85
SAN domains: is-a.dev

Security headers

Strict-Transport-SecurityMissing
Content-Security-PolicyMissing
X-Frame-OptionsMissing
X-Content-Type-OptionsMissing
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 5 · H3 1

Links

2 internal · 6 external · 0 broken

Images

2 total · 0 missing alt

Scripts / Styles

5 scripts · 3 stylesheets

JS / CSS size

63.3 KB · 5.1 KB

Page size

6.0 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Missing canonical link
No H1 heading found
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://is-a.dev
Final URL: https://is-a.dev
HTTP status: 200
HTTP version: HTTP/2
Response time: 229 ms
HTML size: 6.0 KB
Redirect chain: https://is-a.dev

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does is-a.dev use?: We did not detect any specific technologies for is-a.dev in the latest scan.
Is is-a.dev secure (HTTPS)?: Yes. is-a.dev uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 21, 2026.
Who hosts is-a.dev?: is-a.dev is hosted on Fastly, behind Fastly CDN.
What is is-a.dev's SEO score?: is-a.dev scored 65/100 for SEO in the latest analysis (fair).
What is is-a.dev's overall website score?: is-a.dev has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.

Top issues to fix

Organization

Contact

Meta tags

OpenGraph & Twitter Card

Technologies

Hosting & CDN

DNS records

TLS / SSL certificate

Security headers

Content & assets

Robots.txt & Sitemap

SEO issues

Accessibility issues

Scan details

Related websites

Frequently asked questions