SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for 1-net.sg

Hostname mismatch
Issued by (CA)
DigiCert Inc
Subject
*.1-net.com.sg
Valid from
May 11, 2026
Valid until
Nov 25, 2026 (114 days remaining)
Public key
RSA 2048-bit
Serial
096872A7A07F46085BE85128C660F5B7
SHA-256 fingerprint
93:C4:4F:A4:5A:9C:1E:27:9F:F8:EF:76:C9:65:29:3B:A3:E1:80:1A:E8:95:56:DA:19:3E:EC:DF:C7:5A:08:F3
Chain
DigiCert Global G2 TLS RSA SHA256 2020 CA1 → DigiCert Global Root G2
Subject Alternative Names (7)
*.1-net.com.sg, 1-net.com.sg, 1nethexsmtp01.1-net.com.sg, autodiscover.1-net.com.sg, man.1-net.com.sg, portal.1-net.com.sg, webmail.1-net.com.sg

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by 1-net.sg's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch 1-net.sg continuously, notifying you the moment anything moves across all three signals:

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.