caltech.edu
The domain caltech.edu answers at IP address 52.26.125.194. The domain DNS is managed by Cloudflare, which decides where each subdomain points. Mail for caltech.edu goes through 2 servers; the highest priority one is mx1.caltech.iphmx.com. It also publishes 14 TXT records, used to verify domain ownership with external services and to configure mail security through SPF, DKIM and DMARC.
A A records
- 52.26.125.194 300s
MX MX records
- 10 mx1.caltech.iphmx.com 20055s
- 10 mx2.caltech.iphmx.com 20055s
NS NS records
TXT TXT records
- 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 3600s
- iContact1389932 3600s
- amazonses:CBaUu/J2wBFtHuO9isUzHAXTnIWcN5RyPUBvggu7SNE= 3600s
- MS=ms43712753 3600s
- jk01vgvoojdefne9jihhtis667 3600s
- ZOOM_verify_a-Gb5-aqQgygEiKsnho63w 3600s
- amazonses:X9y0RbFXXvxu3ft83xg2e+YV++OUePTUSeCOdB3Chjg= 3600s
- Y84qDmmAIPozyUoBIRWmXsFltoU2Pl8b8WGKPlqgz+1t5Db4z9H5ngaaCTq3TTaOK+SCPYUsGVlGn0wUzXNdow== 3600s
- adobe-idp-site-verification=1e150df049a820e49156727d1b84c48a1ae11f66f87ad76d2cf30cb9d378acb6 3600s
- anthropic-domain-verification-rw8528=rFwrZAPawzCVNGD318e9zzavQ 3600s
- apple-domain-verification=KD7b3wNXe76BHRAV 3600s
- 1password-site-verification=VRLN67QMNNEPXIIREL6TDZABF4 3600s
- autodesk-domain-verification=TtWEzwdFn86i9o8NX_8R 3600s
- openai-domain-verification=dv-fRmGl55vmrLnDqlIOcOoidYz 3600s
SOA SOA records
- ns0090.secondary.cloudflare.com 900s
What each record means
- A and AAAA: the server IP address, in IPv4 and IPv6.
- MX: the servers that receive the domain mail. The number is the priority; the lowest is tried first.
- NS: the name servers, which have the final say over the domain DNS.
- TXT: free text. Mostly used for SPF, DKIM and DMARC, and to verify ownership with third parties.
- TTL: how many seconds the record may be cached before asking again.
Checked 3 hours ago.