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Hosting & Network
us-core.com runs on AS6939 (multi-homed across 2 networks), with email configured.
- Managed DNS
- Self-hosted / other
- Configured
- IPv6 (AAAA)
- Enabled
- CAA pinning
- Set
Sits alongside 4,999+ other sites on AS6939. Stable here since we started watching (Aug 2, 2026).
The apex and www are the same hosting — the apex via A records, www via a CNAME to us-core.com.
DNS Records for us-core.com
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| us-core.com | CAA | 0 | 0 issue letsencrypt.org | |
| us-core.com | NS | 0 | ns1.us-core.com | |
| us-core.com | NS | 0 | ns-global.kjsl.com | |
| us-core.com | NS | 0 | puck.nether.net | |
| us-core.com | A | 0 | 208.82.101.137 | |
| us-core.com | SOA | 3600 | ns1.us-core.com hostmaster.us-core.com 1785082357 43200 900 1209600 3600 | |
| us-core.com | TXT | 0 | v=spf1 a:submission.us-core.com a:wallace-server.us-core.com mx -all | |
| us-core.com | TXT | 0 | google-site-verification=oAA_jg_CNx7GXpOrncai1gYa_ojZuMQ7lpCojyUlDaE | |
| us-core.com | MX | 0 | 10 | sail-ipv4.us-core.com |
| us-core.com | AAAA | 0 | 2001:470:808d:0:3122:6f5d:9dcd:c717 | |
| www.us-core.com | SOA | 3600 | ns1.us-core.com hostmaster.us-core.com 1785082357 43200 900 1209600 3600 | |
| www.us-core.com | AAAA | 0 | 2001:470:808d:0:3122:6f5d:9dcd:c717 | |
| www.us-core.com | MX | 0 | 10 | sail-ipv4.us-core.com |
| www.us-core.com | TXT | 0 | google-site-verification=oAA_jg_CNx7GXpOrncai1gYa_ojZuMQ7lpCojyUlDaE | |
| www.us-core.com | TXT | 0 | v=spf1 a:submission.us-core.com a:wallace-server.us-core.com mx -all | |
| www.us-core.com | CNAME | 0 | us-core.com | |
| www.us-core.com | NS | 0 | puck.nether.net | |
| www.us-core.com | NS | 0 | ns-global.kjsl.com | |
| www.us-core.com | NS | 0 | ns1.us-core.com | |
| www.us-core.com | A | 0 | 208.82.101.137 | |
| www.us-core.com | CAA | 0 | 0 issue letsencrypt.org |
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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