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o-s.de

DNS Records

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Hosting & Network

o-s.de runs on AS15540, with email configured.

Hosting network
AS15540AS15540
Managed DNS
Self-hosted / other
Email
Configured
IPv6 (AAAA)
Not enabled
CAA pinning
None

Sits alongside 2 other sites on AS15540. Stable here since we started watching (Aug 22, 2026).

The apex and www are the same hosting — the apex via A records, www via a CNAME to www.operational-services.de.

DNS Records for o-s.de

HostnameTypeTTLPriorityContent
o-s.deA0139.1.144.170
o-s.deMX0100mailin.ng.telekom.net
o-s.deSOA43200ns1.telekom-domains.de dns.telekom.de 2026061204 10800 3600 2419200 43200
o-s.deNS0ns2.telekom-domains.de
o-s.deNS0ns1.telekom-domains.de
o-s.deTXT0v=spf1 a:mx1.osnow.de ip4:139.1.147.20 ip4:139.1.154.36 ip4:139.1.154.85 include:spf.mailjet.com include:spf.protection.outlook.com include:_spft.telekom.com -all
o-s.deTXT0adobe-idp-site-verification=22f64faf827865075c1f3f1d814848b67f1e2ebe012796f5b958a206affdcbeb
o-s.deTXT0_telesec-domain-validation=349068_2025-05-09_KEHk01BOSFq81qa64AHNkPMruJPXrAAVDOAfaeOoRb0HHpPkGc
o-s.deTXT0cLxU19JBvEUOXXX58zK634zB3AnY+UkiyFIgXx6oxllMNB7u6+4gP5ohuOt+Kuo49gpPeX9h1IJvG01cJPvQ7A==
o-s.deTXT0google-site-verification=16bDs_zgvb63Ngjfhzhvkoc1PtbvI-2l-LfGAHmA1eE
o-s.deTXT0bw=xAQpzx72ByMeL37eDQOpmlTejncoLYVQgUwJzEKZmTDv
o-s.deTXT0_telesec-domain-validation=289752_2021-05-08_lT5jqUK0DinJ6CLLXFCjjm8aeRrM2FvxOzuc4BPFemyR27PZfv
o-s.deTXT0MS=ms94094627
o-s.deTXT0bw=mfR2TAVK6JQylVRXHDHeJu29DXzzTazX4po2aE4zXyCv
o-s.deTXT0_telesec-domain-validation=320049_2023-05-11_yvSeQruEsbiNzif00Y15qmn2mURSXDc63FVSkZnbHoAvaEAktj
o-s.deTXT0ciscocidomainverification=5f53d78f5f2430628b7fc8b5fc5916d1f352747b37a5b3e584a2d614905db833
o-s.deTXT0t7aqkTsZWnl0rX3q+iyh2/kD81TzObQOodtx4JH3nez6aKGTHDgPAeiAj2arEsZ5e+/npP7xXGfxEQHh4refUA==
o-s.deTXT0webexdomainverification.BSJE=ab8c860-3310-4f97-90b8-e73c2e845065
o-s.deTXT0_telesec-domain-validation=291971_2021-06-08_5a3ozzQnBtOLji4dHnKy3DQlsM1dUTGLPzHV1QxtDTexLdr61P
o-s.deTXT0google-gws-recovery-domain-verification=70967628
o-s.deTXT0figma-domain-verification=adbe2dd4629ce6cbaea3e01b0090004d9818ff36fcd87b26fd0e4eb906d730b8-1770801719
o-s.deTXT0bw=s8SvGxCiFXCpSrYscjEtAk0uVVgzorZjOvPvocOGYgZE
www.o-s.deCNAME0www.operational-services.de
www.o-s.deA0139.1.144.170
www.o-s.deTXT0_telesec-domain-validation=271462_2019-05-24_vId5g3PLOJPKFCAHBwtAuWzilnI70EV3pbpG6oPMVwch1RekuF

Get alerted the moment o-s.de's DNS changes

This page is today's snapshot. Turn on monitoring and we'll watch o-s.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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Answers use the live DNS records shown on this page. AI-generated — double-check anything important.

About DNS Records

DNS (Domain Name System) records are instructions that provide information about a domain, including its IP addresses, mail servers, and other services. Common record types include:

  • SOA (Start of Authority) - Contains administrative information about the zone
  • NS (Nameserver) - Specifies authoritative nameservers for the domain
  • A (Address) - Maps a domain to an IPv4 address
  • AAAA - Maps a domain to an IPv6 address
  • CNAME (Canonical Name) - Creates an alias pointing to another domain
  • MX (Mail Exchange) - Specifies mail servers for the domain