concrete-sourcebook.com

.com crawl

First seen 2026-04-20 · Last seen 2026-05-13 · error crawled 2026-05-15 5 attempts

GB · 157.231.186.35 · AS31655 Gamma Telecom Holdings Ltd

Reputation 57/100 wrong cert crawl error no dmarc policy

ssl error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: Hostname mismatch, certificate is not valid for 'concrete-sourcebook.com'. (_ssl.c:1000)

Registration

Registrar

Name SRS AB

Created

2019-01-10

Expires

2027-01-10 235 days left

Updated

2025-12-18

Name servers

ns1.pickaweb.co.uk
ns2.pickaweb.co.uk

DNS records live

NS

ns1.pickaweb.co.uk
ns2.pickaweb.co.uk

MX

0 concrete-sourcebook.com

Email authentication weak

SPF

v=spf1 ip4:5.10.29.28 +a +mx +ip4:89.187.85.11 +ip4:89.187.85.80 +include:spf.ezhostingserver.co.uk +ip4:89.187.86.53 +a:spf.securespamfilter.com +include:relay.mailchannels.net -all

strict (-all)

DMARC

not published

DKIM

default: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA7bWCnsmvxLAZOEGR0E8lyzqKa44D3ReoXCvw1A/tQ8UrpL9JW5zg5bxnn+3iTwW2yuNhwi/yB/qy+G…

selectors probed

Certificate (current) wrong cert

R12

from 2026-05-11 to 2026-08-09

Expires in 81 days

Full certificate history on crt.sh ↗

Linked from (2)

concrete.org.uk×2
concrete-awards.org.uk×1

See all sites whose homepage links to concrete-sourcebook.com →