HOW.IS
?

How is pnas.org?

Looks fine risk 0/100

Registered 31 years ago, on no blocklists we checked, valid HTTPS, the site answered 403 in 65 ms.

Why

02050100
finecarefulhigh risk
  • ·Nothing in the checks added risk.

Rule-based: domain age, blocklists, TLS. A heuristic, not a guarantee.

How pnas.org looks right now
The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.
Site
403
65 ms
HTTPS
45 d
left on a Google Trust Services certificate
Age
31 years
registered 1996-03-23
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records4 record types
A172.64.154.101
104.18.33.155
NSishaan.ns.cloudflare.com
saanvi.ns.cloudflare.com
TXTgoogle-site-verification=xzMG9SIQIFMkhMg-z1FoxTcDa1owuddQERNtSrl-NQc
v=spf1 ip4:65.156.0.0/23 include:sendgrid.net ~all
CAA{'type': 'CAA', 'issue': 'letsencrypt.org', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'letsencrypt.org'}
{'type': 'CAA', 'issue': 'digicert.com; cansignhttpexchanges=yes', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'comodoca.com'}
{'type': 'CAA', 'issue': 'comodoca.com', 'critical': 0}
{'type': 'CAA', 'issue': 'ssl.com', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'digicert.com; cansignhttpexchanges=yes'}
{'type': 'CAA', 'critical': 0, 'issuewild': 'pki.goog; cansignhttpexchanges=yes'}
{'type': 'CAA', 'issue': 'pki.goog; cansignhttpexchanges=yes', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'ssl.com'}
RegistrationNetwork Solutions, LLC
registrarNetwork Solutions, LLC
registered1996-03-23
expires2028-03-24
last changed2026-08-11
nameserversishaan.ns.cloudflare.com
saanvi.ns.cloudflare.com
statusclient transfer prohibited
registered 1996-03-23expires 2028-03-24
HTTPS certificate45 days left
validyes
issuerGoogle Trust Services
coverspnas.org
protocolTLSv1.3
issued 2026-09-17expires 2026-12-16
DNSSECinsecure

Domain is not signed with DNSSEC

. → org → pnas.org
Email authenticationpoor
SPFpass v=spf1 ip4:65.156.0.0/23 include:sendgrid.net ~all
DMARCwarning policy none
DKIMnone of 1 common selectors

Whether mail claiming to be from this domain can be checked as genuine.

Security scoregrade B · 153/205
Basic Security
10/40missing: DNSSEC Enabled, Nameserver Diversity
Record Security
38/45missing: DMARC Record, DKIM Presence
Advanced Security
10/25missing: Mail Server Configuration, IPv6 Support
Domain Reputation
50/50
Threat Detection
45/45missing: Domain Age Check
Blocklists0 listings · 8 lookups
SURBL MultidomainURIBL MultidomainSpamCop172.64.154.101Barracuda172.64.154.101UCEPROTECT Level 1172.64.154.101SpamCop104.18.33.155Barracuda104.18.33.155UCEPROTECT Level 1104.18.33.155

Green: clean. Red: listed. Grey: the list did not answer.

Ask it yourself

Agents get this as data. Bought through the API, the checks behind this page cost $0.070: profile $0.025 + trust $0.020 + screenshot $0.020 + site status $0.005.

curl "https://how.is/v1/domain/trust?domain=pnas.org" \ -H "Authorization: Bearer $HOWIS_KEY" # or pay per call in USDC (x402), no key: the 402 tells your agent the price curl -i "https://how.is/v1/domain/profile?domain=pnas.org"

MCP: add https://how.is/mcp to Claude, Codex or Cursor (one-line install) and ask for domain_trust on pnas.org. Reference: /llms.txt.

IPv6. IPv6 readiness grade for pnas.org Does pnas.org work over IPv6? See the live check on aaaa.bot — website, mail and nameservers, graded A–F.

Watch pnas.org. DNS read at the source every 5 minutes; certificate, blocklists and expiry every 6 hours. You get an email only when something changes.

Watch — $1 / 30 days