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Total

DNS

Email

Security

Network

100

Availability

Domainnsf.gov

IPv41

IPv61

MX records4

StatusActive

Domain technical report

NSF - U.S. National Science Foundation

nsf.gov

NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. territories.

Generated: 2026-08-08T20:49:20-05:00 · Cached result

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IPv41

IPv61

MX4

NS3

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

1 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

3 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

✓

DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

4 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

163 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers12 / 35 pts · Security

3 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: www-legacy-f5.nsf.gov

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓

IPv6 connectivity35 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

128.150.221.244

AAAA

1 record(s)

2620:10f:6002:221::244

CNAME

0 record(s)

—

Not configured

MX

4 record(s)

10 primary.us.etp.fireeyegov.com.
30 alt2.us.etp.fireeyegov.com.
40 alt3.us.etp.fireeyegov.com.
20 alt1.us.etp.fireeyegov.com.

TXT

24 record(s)

"ZOOM_verify_vIOQy6f2SQWeZ2977lDjcQ"
"have-i-been-pwned-verification=4f69051491297bd79446011a4ad80df8"
"cloudflare_dashboard_sso=d35b2d9b7b4059e6dba0a1b67c7aa847"
"pardot392062=053f2d10e7f4c1b927a691aaad73b9b3e7907aa4c63f6eb1213ac7d56751e6f2"
"_lzfje4ty3ldoyjyctn0ynh388feixlo"
"ZOOM_verify_e-wubZa8RVevvUsuV9EDjg"
"amazonses:DamZDYghwrc36rQV5r31e65CG+IMCDnwWTHIYOBhJXw="
"v=spf1 ip4:128.150.5.20/26 ip4:66.77.7.161/32 ip4:66.77.15.226/32 ip4:15.200.32.0/24 ip4:65.123.16.240/28 ip4:65.127.216.64/27" " ip4:3.220.190.25 ip4:3.221.22.181 ip4:35.153.165.194 ip4:18.235.253.50  ip4:23.23.239.161 ip4:52.222.69.242 ip6:2620:10f:6001:5::20/121" " include:spf.constantcontact.com include:spf.protection.outlook.com include:_spf.salesforce.com include:app.aventri.com include:amazonses.com ~all"
"amazonses:WZKkPkyla+989ZOi22G9mHBRQ5+AFckOtwOzHCrGjw0="
"dtm-domain-verification=hhhDP2wLLViJtESmc7Ta3p4TebJnbXRN6QgO17iUa84"
"pardot392062=becfd95f24258e3fc13fcd1a1e1180d727c56b4be4d260083f9cd9b5c9b6c796"
"amazonses:Xen13otWmW+wYsvK3OOWVwVweAySkrZvw4bkN6B8DS0="
"jamf-site-verification=_ilsvY6K1PzATsYm5gIUdA"
"_xosz4nirm95jhg4vwddfa6ihnqvxb5y"
"pardot392062=05fbda79c7018dd8f27b04ea0fd2610c38a298a7f67d08e2ff95fa3c8942dbb2"
"ShNmcKFFVegkbrLv/ZWIayChihj/6ex8I90IpRSXQBkn1Tsx45u+8mCFusWDhJGae2kekkYKk9ufjRoo3NfcEg=="
"adobe-sign-verification=386fe6a5405fa717bbebc4eb4033172a5a3ae93031a11c51f4c2e96d5036dace"
"google-site-verification=vA4yjJZWJbPcVjZIBv-mY5xH88T2uNrEQTfsITLtt4s"
"amazonses:KT2VTwGZXoLetXUWN88a5yYAGXBROcTpc2ZnkOfLDJs="
"atlassian-domain-verification=ZxoQv8eEes8m9y/CQit7XinKIZ2stkuJYobPGxyfb2Vawpwx53WuHXUn1jXwbOSH"
"amazonses:CJeGepY8qu0s5Rvnp0WG10sbMjRq+6TZ7fiY6bMqpiI="
"cisco-ci-domain-verification=668a8a48d9102045865249e856890fb34daf8e2b743f21f0c47df1819f8c46db"
"<meta" "name=\"zoom-domain-verification\"" "content=\"ZOOM_verify_b3xjZjUUQx-tJoqy4aCUyg\">"
"cisco-ci-domain-verification=31282763ef63b65d7fbe70a761e5bb83dbb03877bd585e5d6f9ce91b988d419a"

NS

3 record(s)

ns3.nsf.gov.
ns2.nsf.gov.
ns1.nsf.gov.

SOA

1 record(s)

p-dns-i-gridmstr01.nsf.gov. postmaster.nsf.gov. 408711 10800 1080 2419200 900

CAA

0 record(s)

—

Not configured

DS

2 record(s)

29308 5 2 A3E853C43A03D99EB6E2073BB5FB9EF2F1F5F734F1A737F8478CEE3E A85195B8
12862 13 2 DA537582582747050AAF5092E518CA9BF61540BA6B85DC622088E04E 854216EC

DNSKEY

5 record(s)

257 3 5 AwEAAcgAdLvFYiVcJUiFfb5jZC6nvfPxqXcH/ahUNS5oW0pwTQVg+ZrW fQDCHxzRcjEtA8c2T9XEZWxRIPeWYDG6bOEFZNuiAPZc1EkLh7DPBzxf 7mSUJ+GVfBudqceYCP/ubNxM+kqlYSD79NT/6HUNKGxsjshH6idzC2mp l7BTxLyhllax/MbthTSzOuz/dSuCqr4BW2ZThFNd+lBKeicAym+fZ2hf yGm+ZjTvSh6t7yEiA5uX1rgK7tOJmkadOTaCDY5sUjrSZnrLCd00siXM 3dht6eAuaZ+Tf32MYC279RNykdI7zzG04U/v2Hh1lXjiF4csnvivHDwh boyrZ3Q69ps=
257 3 13 MA1Au2WPoTweRRvZK6dGOk24t+sTdgPHmYPpcmdS0hRvcLREz6OcYm8P J1by6zceF4u/lRPTXyXyU4LJazK2yA==
257 3 5 AwEAAeDQx5B0/08qTu1hN0oSiRili+VfZ17iGkTZACMArkYuSg7R8vAV pLqpStSp6K9LzBWv5Dn1okfqEZPgZS2hXWFodpfYGCGUMMEeW0TpJhd0 VmKq3egJXiAcMfc73QkLp/7SGrT/axT8MsjM84/eMWsZMBYzWWINjKQM JTuDQRUbS3NEvKUF6igcd9W0xL7gdl7v+FGmOuQJKK1yAwFtWHgvmy4e gQCNWHm4yzuH83ZGsdm7wNAa7WvsLdmbJGJlKKMwz0O1/2AZNFs1cCXH 8g4aZVq5ND1Qt5ljdf84AiFbaA0CAO03mWENna10kxrqt4ushUHWmeCO 7uQ+jRHz/qE=
256 3 5 AwEAAcD9RLk+33P4q9ObTZ6kAL+LRRXqmQBjVLhNxZ/ThCjvP4sNnpjV ek+r2JFb81tciujHQXdVlaragxwiqrWni8fIKYT/re+FZ1lkhBmciPAj PAodb8KzKUe02YdjNnUnnGqgOV2wr9/FZVNfdRSz4HtI6wCt8v8uZiMn PFXa4Dj5
256 3 13 iv8BobxgUUEwe/VrVKcfC72xOg1TgiaYWt0XNgpYsiKEtO2G1lWjDdB2 E3gZz4XEeY52nw3kGYNmHa2OJqUyqg==

RRSIG

10 record(s)

DNSKEY 5 2 172800 20260812233119 20260808232458 21628 nsf.gov. nH4wruTivZ/54S1PupgKthusc1pcZE1p1ZURVhVDDXbh3UvwMkGWhOOg ljrw4QCPHBPzDbo8Ov69dEA1iy2Komh3HsvK7+lcBaNjg4tbyU97tTfa w3UIxJpEgbMPePusTmbFGuw7mcgamIspYPeZZ4M5Nt/XUQU0vYLWqkOh TXw=
DNSKEY 5 2 172800 20260812233119 20260808232458 29308 nsf.gov. D3weE/OecmETRO1S4MqqIXsrWKEd3LIoGw/nttx4NeKox4GKzrg/AodP xS8obAq6jr2+j+2WcJNLiKSQSOSSh9yyMzX20BFZ5x7aQ0P5kvjjBYmB UhIftfuh1x6jrJ0/0qmOTNUrseQiWhRStqDIHazeLYeAE4pt2MRabWSe MEjG/1xO1sCxVsveFlWjw2nj5DAbncY8aK0VC+X8tuKZn7GIQhZyYyS4 Xd3yin+6GIS8+nZK///tgwfp/qlYBugFTQLMjRtfymvm8vt3T7KSlHQV pGFHpqgAOhH55/9ZFB4WOQmN4Hn58vfmUeZvKR4CusY6pScVkMSrjmNd lenG9w==
DNSKEY 5 2 172800 20260812233119 20260808232458 46627 nsf.gov. YOnzINrM0tnFFlR4rQ3rs1+SuNO6r4oyhpFuq9cZCqSVEYWArbE5nBCy RBnFK/jcUOtUGLl1JfVK3xHJuHAg/kqiB2BXiP39UbwBiwbBauqSjwc4 EMaNRlL8J1F4yFaR5CU4OE2/JQ6W2efEseyJqK/ylglG6CeGMfvFTior MpduIIfmbq3elLFAY29kZIIyv2PTzkbAXAlocrUuiCV1pfP9GG2i7apN aIvaguDXVLBQYP309HEcEjQXZ6x5pwaOrXXxnfuILs548GzSWopQOCCd bARNEG51iw8/ihKj4yHN7BU5h9PyTD/+/byHuK5bmsmPSItlgQXpmNyh PHK8JA==
DNSKEY 13 2 172800 20260812233119 20260808232458 12862 nsf.gov. qjAdFAo40VlHkfsPpYZL+8MHBw5K1GIgxwreoGiYWTLJPBdHXP+LKH/l IjmoxNuXFVXQ/3yiG/+IPir5dtvJXg==
DNSKEY 13 2 172800 20260812233119 20260808232458 52226 nsf.gov. PShNC/58I9+C/LLzZFWbrkp//P9dIwNNwvnuz+k9N0CZHVP1jiuV494n 0rSCWVf2qr59o/PJQ0Lf4GXyOW7U8w==
NS 5 2 10800 20260812111906 20260808111545 21628 nsf.gov. ruGx6nDRR6UnrIBbz0VKUGG+LeON093QpEnSSOiUJQ+EtakrmwqTgoRg C1ai2aay2MG79pXvWcgdDrMP+DQGMl5MFNUE5PturZTPrRKD93Gbnk2i aAZRFPd6EvlsmITg7QrG/8rWv4jdU05hHzQidyltnfd72hONRn9n9a5t Msk=
NS 13 2 10800 20260812111906 20260808111545 52226 nsf.gov. 79PSscCh7ZyIM+gdVJsPPctQkgINFsYe/gIsdkxB6SOppvCjmh7VHmmd Sqv7PafY6FULU5BexTmjS1Gcwh52DQ==
AAAA 5 2 10800 20260812135942 20260808131249 21628 nsf.gov. cXPSkfyzoYMZzWS7mX+gqzr6gFUWwHLsCCMKqt+vpPkqykNulW2HJ3lS 7/idoD33rAf+uq1Zfh9FgGR+ueVcGS/02EcMwWme3Rwb8coMvfIO44Tv /ZHknEp9n2VzDqwe0XlLHDaw7GqoOnPigMhmWZAdFBaz7vYLTpX5sCoT R6w=
AAAA 13 2 10800 20260812135942 20260808131249 52226 nsf.gov. 54Rxj+KSLnInmtuCAHQcOYimJmZphovO7jCwRyYGiXp9/ntpexw88Drr Hqas/PhBCWCcs8diAyeuTH1RvXHGdw==
DS 13 2 3600 20260810024909 20260808004909 35496 gov. aoYyK37LA5tqhCAKe/gybd/C0Vqr+wcn+umq86SPoKkV++RdCe37Do3R +atAL7YrSYFLodzuDEJAXQhOIyQLog==

NSEC

1 record(s)

848974123.nsf.gov. A NS SOA MX TXT AAAA RRSIG NSEC DNSKEY

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

Configured

v=spf1 ip4:128.150.5.20/26 ip4:66.77.7.161/32 ip4:66.77.15.226/32 ip4:15.200.32.0/24 ip4:65.123.16.240/28 ip4:65.127.216.64/27 ip4:3.220.190.25 ip4:3.221.22.181 ip4:35.153.165.194 ip4:18.235.253.50  ip4:23.23.239.161 ip4:52.222.69.242 ip6:2620:10f:6001:5::20/121 include:spf.constantcontact.com include:spf.protection.outlook.com include:_spf.salesforce.com include:app.aventri.com include:amazonses.com ~all

DMARC

Configured

v=DMARC1;p=reject; fo=1; pct=100;rua=mailto:dmarcemails@nsf.gov,mailto:reports@dmarc.cyber.dhs.gov; ruf=mailto:fremailsdmarc@nsf.gov,mailto:reports@dmarc.cyber.dhs.gov;

DKIM

Selector selector2

v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC8A8yxHWxI5CweyPWiwGORMNF3CLghPW01Z8cbjNvssFYxX6Egkcmh2WXLHfetF3QWUbKkN83bCo16lkw9ebGDJcI9uUxedVXaLkWbrgVeoa00FBYqpqMKt4Q0mgWbXg7RJQ/vEqlZISwqZRmV1ppaArlVlojgwu/BB9E7KpV88QIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

NSF - U.S. National Science Foundation

Description

NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. territories.

Final URL

https://www.nsf.gov/

HTTP status

200

HTTP

Status

HTTP/2 200

Final URL

https://www.nsf.gov/

Version

Server

Apache

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

DigiCert Inc

www-legacy-f5.nsf.gov

Valid from

2026-01-05T18:00:00-06:00

Valid until

2027-01-19T17:59:59-06:00

Days remaining

163

Protocol

TLSv1.2

Cipher

ECDHE-RSA-AES128-GCM-SHA256

Security headers

3 active

✓

HSTSImplemented

—

Content Security PolicyNot detected

✓

X-Content-Type-OptionsImplemented

✓

X-Frame-OptionsImplemented

—

Referrer PolicyNot detected

—

Permissions PolicyNot detected

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

128.150.221.244

84,66 ms

Cloudflare

1.1.1.1

128.150.221.244

74,35 ms

Quad9

9.9.9.9

128.150.221.244

92,52 ms

OpenDNS

208.67.222.222

128.150.221.244

55,00 ms

AdGuard

94.140.14.14

128.150.221.244

59,96 ms

IP, geolocation and ASNAssociated network information

128.150.221.244

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

primary.us.etp.fireeyegov.com

Port 25: Closed/unreachable - 8.5 ms - 
Port 465: Closed/unreachable - 4027.4 ms - 
Port 587: Closed/unreachable - 4015.4 ms -

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