sigcse.org

https://sigcse.org· First analyzed 28 May 2026· Updated 28 May 2026

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sigcse.org

Mobile

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Hosting Provider

A2 Hosting, Inc.

IP Address

190.92.158.4

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Detroit, United States

ASN

AS55293

Organization

A2 Hosting, Inc.

Server

LiteSpeed

Nameservers

ns11.dnsmadeeasy.com.ns15.dnsmadeeasy.com.ns13.dnsmadeeasy.com.ns14.dnsmadeeasy.com.+2 more

Performance

Core Web Vitals

Weight

First Contentful Paint

833 ms10%

Speed Index

1.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1 MB

15 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

A2 Hosting, Inc.

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

CSS Frameworks

Libraries

Fonts

Web Servers

SEO Analysis

D55/100

Meta Tags8/15

Content9/12

Headings1/8

Technical13/25

E-E-A-T3/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

sigcse.orgsigcse.org

ACM SIGCSE

ACM SIGCSE based on Blog Template · Bootstrap v5.3 by Mark Otto, Jacob Thornton, and Bootstrap contributors

Title Length10 chars

Recommended: 50-60 chars (~65px / 580px)

Description Length107 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

9 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

3/100

Poor

1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F39/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

0/25

Citation

8/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

navheader/footer

Text ratio:11%

Words:422

Token eff.:Optimal

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary398w

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

76/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

13/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

4/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

61/100

107 mg

CO₂e / view

1.0 MB

Page Weight

70%

Cleaner Than

New Visitor

122 mg

Returning (cached)

61 mg

Annual (10K/mo)

12.8 kg

Emission Segments

Data Center

5 mg

Network

31 mg

Device

70 mg

Resource Breakdown

JavaScript

58.3 KB

Images

930.0 KB

CSS

61.3 KB

Fonts

832 B

HTML

5.8 KB

Green Hosting Verified

A2 Hosting, Inc.

Provider Match

4 recommendations

•Carbon footprint recommendation preview...

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A+

Security Score

91%Excellent

Static / Informational

HTTPS

No WAF

75d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2+H3

Valid From

14.05.2026

Valid Until

12.08.2026

Subject Alternative Names (4)

*.sigcse.hosting.acm.orgsigcse.orgwww.sigcse.orgwww.sigcse.sigcse.hosting.acm.org

SHA-256 Fingerprint

6E:32:9B:EE:56:C8:6A:1F:D4:E3:CE:4D:34:E5:3C:6E:7F:3B:69:DE...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

alt-svc

h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, h3-Q050=":4...

content-encoding

⚡ Brotli(br)

content-length

5589

content-type

text/html

date

Thu, 28 May 2026 13:26:04 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mail.mailroute.net

Domain Information

sigcse.org

Domain Age

27y 3m

Created

18.02.1999

Expires

18.02.2031

Last Updated

25.12.2025

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

75/100

Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Georgia + -apple-system

WCAG Partial

57/100

Readability

/30

22/30

16px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

12/25

3.42:1 min contrast

Performance

/25

15/25

System fonts

Heading Font

Georgia

Body Font

-apple-system

Sans16px

Contrast Ratio

3.42:1

8 issues

Reading Comfort

~43 CPL

Narrow lines

24px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 47/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 3.4:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

GGoogle Fonts Buy on MyFontsFlesch 47

Color Palette

11 unique colors

Light

#ffffff

Primary· 74.7%

#d1e1f7

Accent· 4.3%

#c3afa8

Secondary· 3.1%

#e7eef4

Secondary· 3%

#18110f

Secondary· 3%

#718fa5

Secondary· 2.6%

#806b69

Secondary· 2.6%

#2c4d64

Secondary· 1.5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

sigcse.org(4)code.jquery.com(1)

Website Identity

sigcse.org

27 years old

Location detected: 🇺🇸 United Statesvia ip

Network Solutions, LLCen

Social Profiles

X (Twitter)

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Last analyzed: 28 May 2026 at 13:26

Historical Analysis & Change Tracking