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 lac-bac.gc.ca

Valid
Issued by (CA)
Entrust Limited
Subject
*.library-archives.canada.ca
Valid from
May 20, 2026
Valid until
Dec 4, 2026 (117 days remaining)
Public key
RSA 2048-bit
Serial
B05A4994D006EBDB307BFA63CDB30B7F
SHA-256 fingerprint
B5:D4:34:B8:F7:A8:07:49:FE:13:CA:95:49:9D:9D:41:50:71:3E:71:97:2B:B1:F0:31:E2:A9:0F:A2:16:6D:19
Chain
Entrust OV TLS Issuing RSA CA 2 → Sectigo Public Server Authentication Root R46
Subject Alternative Names (33)
*.bac-lac.canada.ca, *.bac-lac.gc.ca, *.bibliotheque-archives.canada.ca, *.collectionscanada.ca, *.collectionscanada.gc.ca, *.dam-oclc-secure.bac-lac.gc.ca, *.data2.archives.ca, *.lac-bac.gc.ca, *.library-archives.canada.ca, *.marc21.ca, *.nlc-bnc.ca, *.nouvelle-france.org, bac-lac.canada.ca, bac-lac.gc.ca, bibliotheque-archives.canada.ca, collectionscanada.ca, collectionscanada.gc.ca, dam-oclc-secure.bac-lac.gc.ca, data2.archives.ca, lac-bac.gc.ca, library-archives.canada.ca, marc21.ca, nlc-bnc.ca, nouvelle-france.org, www.bac-lac.canada.ca, www.bac-lac.gc.ca, www.bibliotheque-archives.canada.ca, www.collectionscanada.ca, www.collectionscanada.gc.ca, www.dam-oclc-secure.bac-lac.gc.ca, www.data2.archives.ca, www.marc21.ca, www.nlc-bnc.ca

Certificate Authority Authorization (CAA)

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

Never get surprised by lac-bac.gc.ca's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch lac-bac.gc.ca 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.