mathopt.com

.com crawl

First seen 2026-04-11 · Last seen 2026-05-20 · ok HTTP/1.1 200 1431 ms crawled 2026-05-19

US · 68.66.226.69 · AS55293 A2 Hosting, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title: Large-Scale Convex Optimization: Algorithms & Analyses via Monotone Operators
Generator: jemdoc, see http://jemdoc.jaboc.net/

Technology

Server: Apache

Social

Registration

Registrar

NameCheap, Inc.

Created

2013-12-18

Expires

2026-12-18 211 days left

Updated

2025-11-18

Name servers

ns1.a2hosting.com
ns2.a2hosting.com
ns3.a2hosting.com
ns4.a2hosting.com

DNS records live

NS

ns1.a2hosting.com
ns2.a2hosting.com
ns3.a2hosting.com
ns4.a2hosting.com

MX

0 mail.mathopt.com

Email authentication weak

SPF

v=spf1 +a +mx +ip4:68.66.226.69 include:spf.a2hosting.com ~all

softfail (~all)

DMARC

not published

DKIM

default: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2tp4+dqM0sf+uXTNwDZVufSr4YQkfZTWoG2Uk2cVaBZcbdQd7qSdt2S3RRKT1rXFPECtiRV1e+GlTY…

selectors probed

Certificate (current)

R13

from 2026-05-18 to 2026-08-16

Expires in 88 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 70/100 Checked live page: https://large-scale-book.mathopt.com/

present

strict-transport-security
x-frame-options
x-content-type-options

findings

missing Content Security Policy
missing Referrer Policy
missing Permissions Policy

Header values

x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
strict-transport-security: max-age=63072000; includeSubDomains