slmath.org

.org crawl

First seen 2026-04-13 · Last seen 2026-05-16 · ok HTTP/1.1 200 2265 ms crawled 2026-05-07

US · 52.53.255.1 · AS16509 Amazon.com, Inc.

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title: SLMath
Description: Independent non-profit mathematical sciences research institute founded in 1982 in Berkeley, CA, home of collaborative research programs and public outreach.
Language: en

Technology

Server: nginx

Analytics

Google Tag Manager

Fonts

Google Fonts

Third-party hosts loaded (6)

cdn.jsdelivr.net×2
fonts.googleapis.com×2
code.jquery.com×1
maps.googleapis.com×1
www.google.com×1
www.googletagmanager.com×1

Registration

Registrar

Amazon Registrar, Inc.

Created

2021-10-27

Expires

2026-10-27 161 days left

Updated

2025-09-27

Name servers

ns-1091.awsdns-08.org
ns-1688.awsdns-19.co.uk
ns-275.awsdns-34.com
ns-877.awsdns-45.net

DNS records live

NS

ns-1091.awsdns-08.org
ns-1688.awsdns-19.co.uk
ns-275.awsdns-34.com
ns-877.awsdns-45.net

MX

1 aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com

TXT

Show 5 TXT records

pardot685283=525f2fa1692c0caabd678318799588062f3f7cc75d1ffb6e20b5ac6e4957c73d
sending_domain685283=258094147fa89c1db5faf9f8891c235fe968576fd3b281ce1b448a980135c6a8
_w6tdv7w2fn6t7cjdw4e0moa6lwhw9u7
google-site-verification=amS9459df0fIfVRJ2zUZEZNuXfSwbCucixYv1ERucIE
google-site-verification=rGO2hn0b2aL-zJ5entZSnwGyrC35wx_Lz_nHp0pBp78

Email authentication strong

SPF

v=spf1 include:_spf.google.com ~all

softfail (~all)

DMARC

v=DMARC1; p=none; rua=mailto:itsupport@slmath.org

policy: none (monitoring only)

DKIM

Show 4 DKIM selectors

google: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCzFr1H3H7lCmp0nZYz1NYZNxnqR/5qXLls92B95KlfBOkHpf2OVxxPcR134fTcFUuY99FCYh0zpGa06yQ37r…
k2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA…
s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2Kt8gXH2OFWLb9X6x8hRTPEf+vSmyTrsArvFPBmwLl6SKFpDVxUi/N7T037rIZP63gckqOQN/zfHWkL1AI…
s2: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvrrH6WjRw3WsLupwi84XoOEPYGUrQ737H+N3hhrKb3ab7cdyRLqhY9sTZy8cknsLxlsE/GAxaN1QYQrIVM…

selectors probed

Certificate (current)

R13

from 2026-04-25 to 2026-07-24

Expires in 66 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.slmath.org/

findings

missing HSTS
missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy