DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
tcsos.us runs on AS2152, with email configured.
- Hosting network
- AS2152AS2152
- Managed DNS
- Self-hosted / other
- Configured
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- None
Sits alongside 294 other sites on AS2152. Stable here since we started watching (Jul 15, 2026).
The apex and www are the same hosting — the apex via A records, www via a CNAME to web1.tcsos.us.
DNS Records for tcsos.us
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| tcsos.us | A | 0 | 137.164.198.134 | |
| tcsos.us | MX | 0 | 10 | barracuda.tuolcoe.k12.ca.us |
| tcsos.us | MX | 0 | 20 | cuda.tuolcoe.k12.ca.us |
| tcsos.us | NS | 0 | dns.tcsos.us | |
| tcsos.us | NS | 0 | ns5.cenic.org | |
| tcsos.us | NS | 0 | ns4.cenic.org | |
| tcsos.us | SOA | 3600 | dns.tcsos.us hostmaster.tuolcoe.k12.ca.us 2026031807 3600 300 604800 3600 | |
| tcsos.us | TXT | 0 | v=spf1 ip4:137.164.184.221 ip4:137.164.198.131 ip4:137.164.198.3 ip4:204.129.11.43 include:spf.constantcontact.com include:sendgrid.net -all | |
| tcsos.us | TXT | 0 | MS=ms48096825 | |
| tcsos.us | TXT | 0 | openai-domain-verification=dv-I0z1n5el9CAbm5L64OGzJ7fD | |
| tcsos.us | TXT | 0 | adobe-idp-site-verification=42c9c8f9805a1339091b5cc0346807320b6e0145a877761f58a76a995b4c4b30 | |
| tcsos.us | TXT | 0 | google-site-verification=e4dE-dspS7ocpYASBiopIfCKSUt31Un-uC6ol4ESS-c | |
| www.tcsos.us | CNAME | 0 | web1.tcsos.us | |
| www.tcsos.us | A | 0 | 137.164.198.134 |
Get alerted the moment tcsos.us's DNS changes
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Uptime
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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
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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