DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
tcsteel.us runs on Cloudflare, with DNS by Cloudflare and email via Microsoft 365.
- Hosting network
- CloudflareAS13335Cloudflare
- Managed DNS
- Cloudflare
- Microsoft 365
- IPv6 (AAAA)
- Enabled
- CAA pinning
- None
Sits alongside 4,999+ other sites on Cloudflare. Stable here since we started watching (Aug 10, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for tcsteel.us
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| tcsteel.us | MX | 0 | tcsteel-us.mail.protection.outlook.com | |
| tcsteel.us | SOA | 1800 | gloria.ns.cloudflare.com dns.cloudflare.com 2411194477 10000 2400 604800 1800 | |
| tcsteel.us | AAAA | 0 | 2606:4700:3035::ac43:a64b | |
| tcsteel.us | AAAA | 0 | 2606:4700:3036::6815:2ad1 | |
| tcsteel.us | NS | 0 | rustam.ns.cloudflare.com | |
| tcsteel.us | NS | 0 | gloria.ns.cloudflare.com | |
| tcsteel.us | TXT | 0 | v=spf1 include:8np0f0vuoa.powerspf.com -all | |
| tcsteel.us | A | 0 | 172.67.166.75 | |
| tcsteel.us | A | 0 | 104.21.42.209 | |
| www.tcsteel.us | A | 0 | 104.21.42.209 | |
| www.tcsteel.us | A | 0 | 172.67.166.75 | |
| www.tcsteel.us | AAAA | 0 | 2606:4700:3036::6815:2ad1 | |
| www.tcsteel.us | AAAA | 0 | 2606:4700:3035::ac43:a64b |
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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