DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
caltech.edu runs on Amazon AWS, with DNS by Cloudflare and email configured.
- Hosting network
- Amazon AWSAS16509Amazon AWS
- Managed DNS
- Cloudflare
- Configured
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- None
Sits alongside 5,800,070 other sites on Amazon AWS. Stable here since we started watching (Oct 3, 2026).
DNS Records for caltech.edu
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| caltech.edu | SOA | 900 | ns0090.secondary.cloudflare.com hostmaster.caltech.edu 2022899843 10800 3600 2592000 900 | |
| caltech.edu | NS | 0 | ns0090.secondary.cloudflare.com | |
| caltech.edu | NS | 0 | ns0239.secondary.cloudflare.com | |
| caltech.edu | MX | 0 | 10 | mx1.caltech.iphmx.com |
| caltech.edu | MX | 0 | 10 | mx2.caltech.iphmx.com |
| caltech.edu | TXT | 0 | MS=ms43712753 | |
| caltech.edu | TXT | 0 | 1password-site-verification=VRLN67QMNNEPXIIREL6TDZABF4 | |
| caltech.edu | TXT | 0 | apple-domain-verification=KD7b3wNXe76BHRAV | |
| caltech.edu | TXT | 0 | Y84qDmmAIPozyUoBIRWmXsFltoU2Pl8b8WGKPlqgz+1t5Db4z9H5ngaaCTq3TTaOK+SCPYUsGVlGn0wUzXNdow== | |
| caltech.edu | TXT | 0 | v=spf1 ip4:131.215.0.0/16 ip4:134.4.0.0/16 ip4:192.100.16.0/24 ip4:198.129.208.0/23 ip4:208.69.128.0/22 ip4:199.188.184.0/22 ip4:198.202.125.128/25 ip4:74.122.104.0/22 ip4:72.10.184.102 ip4:72.10.184.103 ip4:72.10.182.15 ip4:72.10.182.16 include:spf.protection.outlook.com include:sendgrid.net include:mktomail.com include:spf.dynect.net include:cust-spf.cashnet.com include:amazonses.com include:_spf.createsend.com include:_spf01.mykronos.com include:_s0.caltech.edu ?all | |
| caltech.edu | TXT | 0 | openai-domain-verification=dv-fRmGl55vmrLnDqlIOcOoidYz | |
| caltech.edu | TXT | 0 | amazonses:CBaUu/J2wBFtHuO9isUzHAXTnIWcN5RyPUBvggu7SNE= | |
| caltech.edu | TXT | 0 | amazonses:X9y0RbFXXvxu3ft83xg2e+YV++OUePTUSeCOdB3Chjg= | |
| caltech.edu | TXT | 0 | autodesk-domain-verification=TtWEzwdFn86i9o8NX_8R | |
| caltech.edu | TXT | 0 | adobe-idp-site-verification=1e150df049a820e49156727d1b84c48a1ae11f66f87ad76d2cf30cb9d378acb6 | |
| caltech.edu | TXT | 0 | jk01vgvoojdefne9jihhtis667 | |
| caltech.edu | TXT | 0 | anthropic-domain-verification-rw8528=rFwrZAPawzCVNGD318e9zzavQ | |
| caltech.edu | TXT | 0 | ZOOM_verify_a-Gb5-aqQgygEiKsnho63w | |
| caltech.edu | TXT | 0 | iContact1389932 | |
| caltech.edu | A | 0 | 52.26.125.194 | |
| www.caltech.edu | A | 0 | 172.64.151.221 | |
| www.caltech.edu | A | 0 | 104.18.36.35 | |
| www.caltech.edu | AAAA | 0 | 2a06:98c1:3101::ac40:97dd | |
| www.caltech.edu | AAAA | 0 | 2a06:98c1:310d::6812:2423 | |
| www.caltech.edu | CNAME | 0 | www.caltech.edu.cdn.cloudflare.net |
Get alerted the moment caltech.edu's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch caltech.edu 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, CNAME, TXT 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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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