sigops.org

https://sigops.org· First analyzed 14 May 2026· Updated 14 May 2026

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sigops.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

ns10.dnsmadeeasy.com.ns12.dnsmadeeasy.com.ns11.dnsmadeeasy.com.ns15.dnsmadeeasy.com.+2 more

Performance

Core Web Vitals

Weight

First Contentful Paint

730 ms10%

Speed Index

949 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

4.2 MB

60 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.8.5

cms

GeneratePressv3.6.0

by Tom Usborne

View Theme

Technology Stack

8 Technologies Detected

Libraries

Other

CSS Frameworks

Icon Libraries

Web Servers

Languages

Plugins

SEO Analysis

B75/100

Meta Tags13/15

Content8/12

Headings8/8

Technical21/25

E-E-A-T3/7

Images3/7

Links2/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

sigops.orgsigops.org

ACM SIGOPS – ACM Special interest Group in Operating Systems

SIGOPSThe ACM Special Interest Group in Operating Systems Join SIGOPS News & Noteworthy Events Recent Awards The SIGOPS B...

Description truncated.

Title Length60 chars

Recommended: 50-60 chars (~378px / 580px)

Description Length279 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (4/5) — critical for accessibility and SEO

7 issues found

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Crawlability

Sitemap

Type: index

7 URLs

7 sub-sitemaps

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

8/100

Poor

2 13 2

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

Sponsored

AI & LLM Readiness

D47/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

0/25

Citation

16/25

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:4%

Words:484

Token eff.:Optimal

Sections/1K:22.7

Depth:2/5

Structured Data

Microdata

Citation Readiness

Opening Summary28w

Descriptive Headingsavg 5.2w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

AI readiness recommendation preview...

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Sponsored

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.

86/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

17/20

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

13/15

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

ARIA & Roles

6/15

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

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.

43/100

431 mg

CO₂e / view

4.2 MB

Page Weight

15%

Cleaner Than

New Visitor

493 mg

Returning (cached)

247 mg

Annual (10K/mo)

51.8 kg

Emission Segments

Data Center

21 mg

Network

127 mg

Device

284 mg

Resource Breakdown

JavaScript

111.2 KB

Images

3.6 MB

CSS

497.1 KB

HTML

15.9 KB

Green Hosting Verified

A2 Hosting, Inc.

Provider Match

3 recommendations

•Carbon footprint recommendation preview...

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A+

Security Score

91%Excellent

Static / Informational

HTTPS

No WAF

87d

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

11.05.2026

Valid Until

09.08.2026

Subject Alternative Names (4)

*.sigops.hosting.acm.orgsigops.hosting.acm.orgsigops.orgwww.sigops.org

SHA-256 Fingerprint

98:A5:2C:50:2B:DF:22:34:AE:32:D2:71:D4:F1:F8:E4:17:0B:A2:54...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

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

content-encoding

⚡ Brotli(br)

content-length

15949

content-type

text/html; charset=UTF-8

date

Thu, 14 May 2026 05:25:57 GMT

etag

"1580-1778240597;br"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.mailroute.net

Domain Information

sigops.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.

77/100

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

Typography & Readability

Roboto

WCAG Partial

77/100

Readability

/30

25/30

16px · LH 1.70

Hierarchy

/20

16/20

2.5x ratio · ✓ H1→H6

WCAG

/25

17/25

1:1 min contrast

Performance

/25

19/25

System fonts

Heading Font

Roboto

Sans40px

Body Font

Roboto

Sans16px

Contrast Ratio

1:1

24 issues

Reading Comfort

~39 CPL

Narrow lines

40px

30px

21px

45px

16px

Minor Third

Scale

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

⚠️ Partial contrast: 24 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

✅ System fonts: Zero font loading delay — best possible LCP impact.

Color Palette

8 unique colors

3.26:1 AA Large Light

#ffffff

Background· 51.3%

#8e8d9b

Other· 5.5%

#000f1a

Primary· 22.699999999999996%

#7b3c58

Secondary· 5.8%

#132951

Accent· 5.7%

#420e3f

Accent· 3.2%

#f2e9e4

Secondary· 2.3%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

sigops.org(15)

Website Identity

sigops.org

27 years old

Location detected: 🇺🇸 United Statesvia ip

Network Solutions, LLCen-US

Social Profiles

X (Twitter)YouTube

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Last analyzed: 14 May 2026 at 05:26

Historical Analysis & Change Tracking