Domain technical report
Be a Force for the Future | NRDC
nrdc.org
NRDC uses science, policy, law, and people power to confront the climate crisis, protect public health, and safeguard nature.
IPv41
IPv60
MX2
NS4
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78
Total
70
DNS
90
Email
100
Security
50
Network
60
Availability
Domainnrdc.org
IPv41
IPv60
MX records2
StatusActive
DiagnosticsMain findings and recommendations
IPv4 (A)30 / 30 pts · Dns
1 IPv4 address(es) detected.
IPv6 (AAAA)0 / 10 pts · Dns
0 IPv6 address(es) detected.
Name server redundancy20 / 20 pts · Dns
4 NS record(s); 2 or more required.
SOA record10 / 10 pts · Dns
Authoritative zone record.
DNSSEC chain0 / 15 pts · Dns
Both DS and DNSKEY are required.
CAA policy0 / 5 pts · Dns
Certificate authority restriction.
DNS propagation10 / 10 pts · Dns
Agreement between public resolvers.
MX records20 / 20 pts · Mail
2 MX record(s).
SPF25 / 25 pts · Mail
SPF policy published.
DMARC25 / 25 pts · Mail
DMARC policy published.
DKIM20 / 20 pts · Mail
A DKIM selector was verified.
MTA-STS0 / 5 pts · Mail
Mail transport policy.
TLS-RPT0 / 5 pts · Mail
TLS reporting policy.
Valid TLS certificate55 / 55 pts · Security
47 day(s) remaining.
Certificate lifetime10 / 10 pts · Security
Full points require at least 30 days remaining.
HTTP security headers35 / 35 pts · Security
9 of 9 evaluated headers detected.
PTR reverse DNS30 / 30 pts · Network
PTR: 172-104-26-72.ip.linodeusercontent.com
IPv4 diversity20 / 35 pts · Network
Two or more IPv4 addresses receive full points.
IPv6 connectivity0 / 35 pts · Network
AAAA availability.
DNS resolution40 / 40 pts · Availability
At least one address family must resolve.
HTTP response0 / 40 pts · Availability
HTTP/2 403
HTTPS final URL20 / 20 pts · Availability
Final URL uses HTTPS.
DNS and emailPublished records and email configuration
A
1 record(s)172.104.26.72
AAAA
0 record(s)—
Not configured
CNAME
0 record(s)—
Not configured
MX
2 record(s)10 mxb-0030d801.gslb.pphosted.com. 10 mxa-0030d801.gslb.pphosted.com.
TXT
9 record(s)"google-site-verification=zrhr9nQnHuMhostFkDekqBzebjI3L_0x7hcKLpbs0kw"
"pexip-ms-tenant-domain-verification=dc2c0cca-0666-451f-bbe0-001aa984617d"
"docusign=64d531ea-6334-42a0-9208-bbf4a8b0bf9a"
"ciscocidomainverification=616ed4ff71808abf72d6167da65a9e3df85155f6d1101adf7360fec0883883d2"
"apple-domain-verification=8MFTcrXRWQIWYOig"
"google-site-verification=gc_l4pkaXkT_GbFvYvA2z1TQs1LgMFaPFdJP-bqdfrY"
"v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all"
"795981589-23226688"
"g5/aA3/CpAYFd1PtcJMCh+/M0fex9tqF9UxJv7TMt608PM6c8Y+wTpd58rJxPvN50X4WpYSC7j1pl6uEGNgD2Q=="NS
4 record(s)ns1-02.azure-dns.com. ns4-02.azure-dns.info. ns2-02.azure-dns.net. ns3-02.azure-dns.org.
SOA
1 record(s)ns1-02.azure-dns.com. azuredns-hostmaster.microsoft.com. 1 3600 300 2419200 300
CAA
0 record(s)—
Not configured
DS
0 record(s)—
Not configured
DNSKEY
0 record(s)—
Not configured
RRSIG
0 record(s)—
Not configured
NSEC
0 record(s)—
Not configured
NSEC3
0 record(s)—
Not configured
SRV
0 record(s)—
Not configured
NAPTR
0 record(s)—
Not configured
TLSA
0 record(s)—
Not configured
SSHFP
0 record(s)—
Not configured
SPF
Configuredv=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~allDMARC
Configuredv=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com
DKIM
Selector selector1v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC3M6i21QgMJv+zFZkyxNGKsTZVQSFU1FRZZ0LzY1yNB8GSnIEgRSbV8e5BPZI8lzbf24d7+sPfjGRc608G5/yxTy/ZuqboMRdB4ADYwalbg4QNOnHjPGZ14O9Vd9HgigXNTIKIVB7TphOppvASElqK5xzxO+4rG7OaQv6mIcWFyQIDAQAB; n=1024,1448973760,1464784960
Analyzed webpageMetadata and HTTP response
Title and description
ExtractedTitle
Be a Force for the Future | NRDC
Description
NRDC uses science, policy, law, and people power to confront the climate crisis, protect public health, and safeguard nature.
Final URL
https://www.nrdc.org/
HTTP status
200
HTTP
Status
HTTP/2 403
Final URL
https://www.nrdc.org/
Version
3
Server
cloudflare
X-Powered-By
SSL and HTTP securityCertificate, protocol and security headers
SSL certificate
AvailableAvailable
Yes
Issuer
Let's Encrypt
CN
nrdc.org
Valid from
2026-06-27T17:43:56-05:00
Valid until
2026-09-25T17:43:55-05:00
Days remaining
47
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384
Security headers
9 activeHSTSImplemented
Content Security PolicyImplemented
X-Content-Type-OptionsImplemented
X-Frame-OptionsImplemented
Referrer PolicyImplemented
Permissions PolicyImplemented
Cross-Origin-Opener-PolicyImplemented
Cross-Origin-Embedder-PolicyImplemented
Cross-Origin-Resource-PolicyImplemented
DNS propagationComparison across public resolvers
Public resolver comparison
ConsistentConsistent propagation
5 public resolvers queried.
ResolverServerResultLatency
Google
8.8.8.8172.104.26.72
55,01 ms
Cloudflare
1.1.1.1172.104.26.72
63,56 ms
Quad9
9.9.9.9172.104.26.72
76,62 ms
OpenDNS
208.67.222.222172.104.26.72
73,35 ms
AdGuard
94.140.14.14172.104.26.72
125,33 ms
IP, geolocation and ASNAssociated network information
172.104.26.72
No datasuccess
No
country
region
city
asn
organization
isp
Visitor information
Visitorip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No
SMTPEmail port connectivity
mxb-0030d801.gslb.pphosted.com
Port 25: Closed/unreachable - 23.7 ms - Port 465: Closed/unreachable - 49.5 ms - Port 587: Closed/unreachable - 76.9 ms -