visa.com

Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-190.akam.net: "41824.8"; a1-190.akam.net: "41824.4"; a10-64.akam.net: "48878.27"; a10-64.akam.net: "48878.26"; a2-65.akam.net: "48878.26"; a2-65.akam.net: "48878.31"; a9-64.akam.net: "41824.9"; a9-64.akam.net: "41824.11"; lloyd.ns.cloudflare.com: "2026.10.2"; melinda.ns.cloudflare.com: "2026.10.2". Hide or replace the version string.

SOA · The nameservers serve different versions of the zone: 2019112733 on a1-190.akam.net (193.108.91.190), a1-190.akam.net (2600:1401:2::be), a10-64.akam.net (96.7.50.64), a10-64.akam.net (2600:1480:d000::40), a2-65.akam.net (95.100.174.65), a2-65.akam.net (2600:1480:7000::41), a9-64.akam.net (184.85.248.64), a9-64.akam.net (2a02:26f0:117::40); 2418147659 on lloyd.ns.cloudflare.com (173.245.59.197), lloyd.ns.cloudflare.com (108.162.193.197), lloyd.ns.cloudflare.com (172.64.33.197), lloyd.ns.cloudflare.com (2a06:98c1:50::ac40:21c5), lloyd.ns.cloudflare.com (2606:4700:58::adf5:3bc5), lloyd.ns.cloudflare.com (2803:f800:50::6ca2:c1c5), melinda.ns.cloudflare.com (173.245.58.198), melinda.ns.cloudflare.com (108.162.192.198), melinda.ns.cloudflare.com (172.64.32.198), melinda.ns.cloudflare.com (2a06:98c1:50::ac40:20c6), melinda.ns.cloudflare.com (2803:f800:50::6ca2:c0c6), melinda.ns.cloudflare.com (2606:4700:50::adf5:3ac6). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.

DNSSEC · The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.

DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.

MX · The following MX hosts could not be resolved to IPv6 addresses: portal1i.visa.com, portal2i.visa.com, portal3i.visa.com, portal4i.visa.com

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: s2 (1024 bits). Rotate to a 2048-bit key.

TLS · MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.