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 w-swap.com

Valid
Issued by (CA)
Let's Encrypt
Subject
w-swap.com
Valid from
Sep 22, 2026
Valid until
Dec 21, 2026 (67 days remaining)
Public key
EC 256-bit
Serial
05B84D9604F5C67A78BCD5631E09027402E2
SHA-256 fingerprint
65:3A:AC:C6:C9:94:ED:25:72:24:DC:C9:6F:EA:6A:89:00:63:EA:A9:87:77:6E:88:17:2C:2B:4B:B4:A2:EF:4E
Chain
YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
*.w-swap.com, w-swap.com

Certificate Authority Authorization (CAA)

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

This certificate has been served since Sep 26, 2026.

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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.

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