SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
as-office.de
SSL/TLS Certificate
SSL/TLS Certificate for as-office.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- as-office.de
- Valid from
- Jul 31, 2026
- Valid until
- Oct 29, 2026 (56 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 06D86C365E5FFF3B575374942F40458C0FAD
- SHA-256 fingerprint
- AC:0A:46:D1:A2:F7:E3:7B:03:0E:0C:8B:7C:C0:65:2F:57:AA:CD:5B:5A:DB:DA:AE:B1:5A:2B:21:FF:EC:35:1A
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by as-office.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch as-office.de 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.
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