sigplan.org
SIGPLAN
Last scanned Aug 24, 2026, 1:23 PM
Overall score
Fair
Summary
This website uses jQuery hosted on A2HOSTING - A2 Hosting, Inc., US. SEO is fair (55/100) and accessibility is fair (60/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Missing meta description.
- United States
- Hosted on A2HOSTING - A2 Hosting, Inc., US
Top issues to fix
9 issues found · 4 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
+3 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
333 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- SIGPLAN
- Description
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- A2HOSTING - A2 Hosting, Inc., US
- CDN provider
- —
- IP address
- 190.92.158.4
- ASN
- AS55293 (A2HOSTING - A2 Hosting, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX |
|
| TXT |
|
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.2
- Issuer
- Let's Encrypt
- Subject
- www.sigplan-www.sigplan.hosting.acm.org
- Valid from
- Jul 14, 2026
- Valid to
- Oct 12, 2026
- Days until expiry
- 47
- SAN domains
- *.sigplan.hosting.acm.org, sigplan.hosting.acm.org, sigplan.org, www.sigplan-pages.sigplan.hosting.acm.org, www.sigplan-www.sigplan.hosting.acm.org, www.sigplan.org
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 0 · H3 5
Links
71 internal · 13 external · 1 broken
Images
1 total · 1 missing alt
Scripts / Styles
2 scripts · 2 stylesheets
JS / CSS size
118 KB · 102 KB
Page size
19.5 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing meta description
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
- No H1 heading found
Scan details
- Requested URL
- https://sigplan.org
- Final URL
- https://sigplan.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 333 ms
- HTML size
- 19.5 KB
- Redirect chain
- https://sigplan.org
See something wrong on this report? Request a correction
Related websites
Same technology stack
noc.org
CDN & WAF for Hosts and MSPs | NOC.org
rbj.net
Rochester Business Journal
datcom.com.au
Datcom Cloud: Managed IT & Cybersecurity Services Sydney
ip2whois.com
Free WHOIS - Domain WHOIS Lookup | IP2WHOIS.com
nzb.life
NZB.life - Usenet NZB Indexer and Search
rwang168.com
อาหวัง168
Same hosting provider
icarry.in
Shipping & Courier Aggregator Services/Solutions for Business | iCarry.in
nmcourts.gov
Home - New Mexico Courts
syncdocs.com
Syncdocs – The Best Google Drive App
sordum.org
Simplify Your computer Usage
twintech.co.ls
Twin Technologies - Instant Solution on Mouse Click
dataentryprojects.in
Under Construction Page
Frequently asked questions
- What technology does sigplan.org use?
- sigplan.org is built with Bootstrap, jQuery.
- Is sigplan.org secure (HTTPS)?
- Yes. sigplan.org uses TLS 1.2 with a certificate issued by Let's Encrypt, valid until Oct 12, 2026.
- Who hosts sigplan.org?
- sigplan.org is hosted on A2HOSTING - A2 Hosting, Inc., US.
- What is sigplan.org's SEO score?
- sigplan.org scored 55/100 for SEO in the latest analysis (fair).
- What is sigplan.org's overall website score?
- sigplan.org has an overall SiteGraph score of 76/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card