`nsf.gov`

DNSSEC	⚠️ Not signed
A	2620:10f:6002:221::244^{🇺🇸 AS1022620:10f:6000::/40}
		PTR	`nsf.gov`
		PTR	`www-legacy-f5.nsf.gov`
A	128.150.221.244^{🇺🇸 AS102128.150.0.0/16}
NS	`p-dns-i-gridmstr01.nsf.gov` ⭐
		A	128.150.224.62^{🇺🇸 AS102128.150.0.0/16}
			PTR	`p-dns-i-gridmstr01.nsf.gov`
NS	`ns1.nsf.gov`
		A	2620:10f:6001:2::55^{🇺🇸 AS1022620:10f:6000::/40}
		A	128.150.2.55^{🇺🇸 AS102128.150.0.0/16}
			PTR	`ns1.nsf.gov`
NS	`ns2.nsf.gov`
		A	2620:10f:6001:2::56^{🇺🇸 AS1022620:10f:6000::/40}
			PTR	`ns2.nsf.gov`
			PTR	`p-dns-ext-l-02.nsf.gov`
		A	128.150.2.56^{🇺🇸 AS102128.150.0.0/16}
			PTR	`ns2.nsf.gov`
NS	`ns3.nsf.gov`
		A	2620:10f:6025:1::20^{🇺🇸 AS1022620:10f:6000::/40}
			PTR	`ns3.nsf.gov`
		A	128.150.1.20^{🇺🇸 AS102128.150.0.0/16}
			PTR	`ns3.nsf.gov`
MX	`primary.us.etp.fireeyegov.com` ⭐
		A	15.200.32.1^{🇺🇸 AWS-GOVCLOUD15.200.0.0/16 Amazon EC2 PDT prefix}
			PTR	`mta-eb5a4764c0c868e4da7e356bf7626da7.email.us.etp.fireeyegov.com`
		A	15.200.32.2^{🇺🇸 AWS-GOVCLOUD15.200.0.0/16 Amazon EC2 PDT prefix}
			PTR	`mta-d22407be4824bd60f6dd78c36abbbb59.email.us.etp.fireeyegov.com`
		A	15.200.32.3^{🇺🇸 AWS-GOVCLOUD15.200.0.0/16 Amazon EC2 PDT prefix}
			PTR	`mta-8e3f90e34cda6c74b513550245ca0a9f.email.us.etp.fireeyegov.com`
MX	`alt1.us.etp.fireeyegov.com`⁽²⁰⁾
		A	15.200.32.1^{🇺🇸 AWS-GOVCLOUD15.200.0.0/16 Amazon EC2 PDT prefix}
			PTR	`mta-eb5a4764c0c868e4da7e356bf7626da7.email.us.etp.fireeyegov.com`
		A	15.200.32.2^{🇺🇸 AWS-GOVCLOUD15.200.0.0/16 Amazon EC2 PDT prefix}
			PTR	`mta-d22407be4824bd60f6dd78c36abbbb59.email.us.etp.fireeyegov.com`
		A	15.200.32.3^{🇺🇸 AWS-GOVCLOUD15.200.0.0/16 Amazon EC2 PDT prefix}
			PTR	`mta-8e3f90e34cda6c74b513550245ca0a9f.email.us.etp.fireeyegov.com`
MX	`alt2.us.etp.fireeyegov.com`⁽³⁰⁾
		A	15.200.32.1^{🇺🇸 AWS-GOVCLOUD15.200.0.0/16 Amazon EC2 PDT prefix}
			PTR	`mta-eb5a4764c0c868e4da7e356bf7626da7.email.us.etp.fireeyegov.com`
		A	15.200.32.2^{🇺🇸 AWS-GOVCLOUD15.200.0.0/16 Amazon EC2 PDT prefix}
			PTR	`mta-d22407be4824bd60f6dd78c36abbbb59.email.us.etp.fireeyegov.com`
		A	15.200.32.3^{🇺🇸 AWS-GOVCLOUD15.200.0.0/16 Amazon EC2 PDT prefix}
			PTR	`mta-8e3f90e34cda6c74b513550245ca0a9f.email.us.etp.fireeyegov.com`
MX	`alt3.us.etp.fireeyegov.com`⁽⁴⁰⁾
		A	15.200.32.1^{🇺🇸 AWS-GOVCLOUD15.200.0.0/16 Amazon EC2 PDT prefix}
			PTR	`mta-eb5a4764c0c868e4da7e356bf7626da7.email.us.etp.fireeyegov.com`
		A	15.200.32.2^{🇺🇸 AWS-GOVCLOUD15.200.0.0/16 Amazon EC2 PDT prefix}
			PTR	`mta-d22407be4824bd60f6dd78c36abbbb59.email.us.etp.fireeyegov.com`
		A	15.200.32.3^{🇺🇸 AWS-GOVCLOUD15.200.0.0/16 Amazon EC2 PDT prefix}
			PTR	`mta-8e3f90e34cda6c74b513550245ca0a9f.email.us.etp.fireeyegov.com`
TXT	`ZOOM_verify_vIOQy6f2SQWeZ2977lDjcQ`
TXT	`ZOOM_verify_e-wubZa8RVevvUsuV9EDjg`
TXT	`pardot392062=05fbda79c7018dd8f27b04ea0fd2610c38a298a7f67d08e2ff95fa3c8942dbb2`
TXT	`pardot392062=becfd95f24258e3fc13fcd1a1e1180d727c56b4be4d260083f9cd9b5c9b6c796`
TXT	`pardot392062=053f2d10e7f4c1b927a691aaad73b9b3e7907aa4c63f6eb1213ac7d56751e6f2`
TXT	`amazonses:DamZDYghwrc36rQV5r31e65CG+IMCDnwWTHIYOBhJXw=`
TXT	`amazonses:KT2VTwGZXoLetXUWN88a5yYAGXBROcTpc2ZnkOfLDJs=`
TXT	`amazonses:CJeGepY8qu0s5Rvnp0WG10sbMjRq+6TZ7fiY6bMqpiI=`
TXT	`<metaname="zoom-domain-verification"content="ZOOM_verify_b3xjZjUUQx-tJoqy4aCU...`
TXT	`amazonses:Xen13otWmW+wYsvK3OOWVwVweAySkrZvw4bkN6B8DS0=`
TXT	`ShNmcKFFVegkbrLv/ZWIayChihj/6ex8I90IpRSXQBkn1Tsx45u+8mCFusWDhJGae2kekkYKk9ufj...`
TXT	`v=spf1 ip4:128.150.5.20/26 ip4:66.77.7.161/32 ip4:66.77.15.226/32 ip4:128.150...`
TXT	`_lzfje4ty3ldoyjyctn0ynh388feixlo`
TXT	`adobe-sign-verification=386fe6a5405fa717bbebc4eb4033172a5a3ae93031a11c51f4c2e...`
TXT	`_e2bgk5emxy2urhc02hbj3qdfio78rre`
TXT	`dtm-domain-verification=hhhDP2wLLViJtESmc7Ta3p4TebJnbXRN6QgO17iUa84`
TXT	`atlassian-domain-verification=ZxoQv8eEes8m9y/CQit7XinKIZ2stkuJYobPGxyfb2Vawpw...`
TXT	`cisco-ci-domain-verification=668a8a48d9102045865249e856890fb34daf8e2b743f21f0...`
TXT	`cisco-ci-domain-verification=31282763ef63b65d7fbe70a761e5bb83dbb03877bd585e5d...`
TXT	`google-site-verification=vA4yjJZWJbPcVjZIBv-mY5xH88T2uNrEQTfsITLtt4s`
TXT	`amazonses:WZKkPkyla+989ZOi22G9mHBRQ5+AFckOtwOzHCrGjw0=`
TXT	`have-i-been-pwned-verification=4f69051491297bd79446011a4ad80df8`
SOA	`p-dns-i-gridmstr01.nsf.gov`postmaster@nsf.gov serial=388768

`gov`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.ns.gov` ⭐ 🔒
	NS	`b.ns.gov` 🔒
	NS	`c.ns.gov` 🔒
	NS	`d.ns.gov` 🔒
	SOA	`a.ns.gov`dns@cloudflare.com serial=1771633805

rank #1242 globally
rank #62 in the tld
This domain name "nsf.gov" belongs to the National Science Foundation, an independent agency of the United States government that provides funding for approximately a quarter of all federally supported basic research conducted by America's colleges and universities. The NSF also supports research in non-medical fields of science and engineering.WOT: SAFE (94/100)
📈 Tranco rank: #4,679

PTR for

4.4.2.0.0.0.0.0.0.0.0.0.0.0.0.0.1.2.2.0.2.0.0.6.f.0.1.0.0.2.6.2.ip6.arpa

244.221.150.128.in-addr.arpa

Up

ns1.nsf.gov

www-legacy-f5.nsf.gov

etap.nsf.gov

p-dns-ext-l-01.nsf.gov

bear.nsf.gov

wolf.nsf.gov

www.nsf.gov

itr.nsf.gov

listserv.nsf.gov

p-smtp-l-rly03.nsf.gov

sr.nsf.gov

rptsql.nsf.gov

ncsesdata.nsf.gov

seedfund.nsf.gov

ns3.nsf.gov

oig.nsf.gov

dasstoreclus.nsf.gov

govdelivery.nsf.gov

p-dns-i-gridmstr01.nsf.gov

gamma.nsf.gov

atlas.nsf.gov

gmlob.nsf.gov

fastlane.nsf.gov

p-dns-ext-l-02.nsf.gov

flprod.nsf.gov

search.nsf.gov

coop.nsf.gov

cyclone.nsf.gov

p-smtp-l-relay01.nsf.gov

oos.nsf.gov

twister.nsf.gov

ns2.nsf.gov

p-smtp-l-relay02.nsf.gov

dragon.nsf.gov

sip.nsf.gov

remote.nsf.gov

nsf-mailrly-l-01.nsf.gov

cov.nsf.gov

p-smtp-l-rly02.nsf.gov

pool.nsf.gov

p-smtp-l-rly01.nsf.gov

access.nsf.gov

w655321.nsf.gov

extadfs2.nsf.gov

owa.nsf.gov

p-smtp-l-relay03.nsf.gov

Same first word

nsf.asia

nsf.co.nz

nsf.or.th

nsf.co

nsf.jp

nsf.ie

nsf.net

nsf.gov.ps

nsf.me

nsf.pl

nsf.gov

nsf.com

nsf.vn

nsf.info

nsf.community

nsf.sk

nsf.tax

nsf.partners

nsf.it

nsf.tv

nsf.org.cn

nsf.cz

nsf.dk

nsf.gov.lk

nsf.fi

nsf.se

nsf.ca

nsf.es

nsf.cn

nsf.be

nsf.co.za

nsf.cl

nsf.email

nsf.tc

nsf.ac.lk

nsf.mobi

nsf.ps

nsf.ch

nsf.legal

nsf.ro

nsf.com.au

nsf.education

nsf.com.br

nsf.de

nsf.no

nsf.services

nsf.in

nsf.at

nsf.ru

nsf.li

nsf.org

nsf.nl

nsf.agency

Similar names

sfn.com

snf.or.th

fsn.tv

fns.it

sfn.io

snf.me

nfs.in

fsn.tf

fns.pl

fns.com.ua

fns.us

fsn.at

fns.com.au

snf.com.br

nfs.at

snf.io

snf.company

snf.ru

snf.nu

nfs.guru

fns.su

nfs.ie

sfn.com.tw

nfs.su

sfn.email

fns.gouv.ci

fsn.us

fsn.by

nfs.lt

fns.co

nfs.com.ru

fns.deals

snf.jp

fsn.net

fsn.jp

fsn.cz

snf.se

sfn.tv

sfn.sg

sfn.im

nfs.nl

snf.co.za

fsn.hu

fns.no

nfs.com.pl

fns.es

fsn.rs

fsn.com.mx

snf.com

nfs.onl

snf.nl

fns.org

fns.me

snf.org

fns.is

snf.healthcare

snf.cn

nfs.co.nz

sfn.gr

nfs.lu

snf.at

nfs.lv

nfs.bm

fns.eu

nfs.me

snf.fi

nfs.academy

nfs.nfshost.com

snf.no

fns.global

sfn.es

nfs.be

sfn.cn

nfs.cz

nfs.ca

nfs.mobi

fns.org.uk

fns.com.br

DNS History

21 records (10 active, 11 former)

○NScyclone.nsf.gov2015-09-01 → 2016-12-01 · 5 obs

○ 2008-02-19 08:12:12
● 2015-09-01 10:22:46
● 2016-12-01 06:43:16
○ 2016-12-08 14:45:00
○ 2026-02-26 14:27:08

●NSns1.nsf.gov2016-12-08 → 2026-02-26 · 3 obs

○ 2016-12-01 06:43:16
● 2016-12-08 14:45:00
● 2026-02-26 14:27:08

●NSns2.nsf.gov2016-12-08 → 2026-02-26 · 3 obs

○ 2016-12-01 06:43:16
● 2016-12-08 14:45:00
● 2026-02-26 14:27:08

●NSns3.nsf.gov2016-12-08 → 2026-02-26 · 3 obs

○ 2016-12-01 06:43:16
● 2016-12-08 14:45:00
● 2026-02-26 14:27:08

●NSp-dns-i-gridmstr01.nsf.gov2016-12-08 → 2026-02-26 · 3 obs

○ 2016-12-01 06:43:16
● 2016-12-08 14:45:00
● 2026-02-26 14:27:08

○NSswirl.nsf.gov2015-09-01 → 2016-12-01 · 5 obs

○ 2008-02-19 08:12:12
● 2015-09-01 10:22:46
● 2016-12-01 06:43:16
○ 2016-12-08 14:45:00
○ 2026-02-26 14:27:08

○NStwister.nsf.gov2015-09-01 → 2016-12-01 · 5 obs

○ 2008-02-19 08:12:12
● 2015-09-01 10:22:46
● 2016-12-01 06:43:16
○ 2016-12-08 14:45:00
○ 2026-02-26 14:27:08

○NSwhirl.nsf.gov2015-09-01 → 2016-12-01 · 5 obs

○ 2008-02-19 08:12:12
● 2015-09-01 10:22:46
● 2016-12-01 06:43:16
○ 2016-12-08 14:45:00
○ 2026-02-26 14:27:08

○MXalt1.us.email.fireeyecloud.com2019-09-01 → 2020-09-20 · 5 obs

○ 2015-09-01 10:22:46
● 2019-09-01 06:38:06
● 2020-09-20 17:31:52
○ 2021-01-05 08:51:44
○ 2026-02-26 14:27:08

●MXalt1.us.etp.fireeyegov.com2021-01-05 → 2026-02-26 · 3 obs

○ 2020-09-20 17:31:52
● 2021-01-05 08:51:44
● 2026-02-26 14:27:08

○MXalt2.us.email.fireeyecloud.com2019-09-01 → 2020-09-20 · 5 obs

○ 2015-09-01 10:22:46
● 2019-09-01 06:38:06
● 2020-09-20 17:31:52
○ 2021-01-05 08:51:44
○ 2026-02-26 14:27:08

●MXalt2.us.etp.fireeyegov.com2021-01-05 → 2026-02-26 · 3 obs

○ 2020-09-20 17:31:52
● 2021-01-05 08:51:44
● 2026-02-26 14:27:08

○MXalt3.us.email.fireeyecloud.com2019-09-01 → 2020-09-20 · 5 obs

○ 2015-09-01 10:22:46
● 2019-09-01 06:38:06
● 2020-09-20 17:31:52
○ 2021-01-05 08:51:44
○ 2026-02-26 14:27:08

●MXalt3.us.etp.fireeyegov.com2021-01-05 → 2026-02-26 · 3 obs

○ 2020-09-20 17:31:52
● 2021-01-05 08:51:44
● 2026-02-26 14:27:08

○MXnsf-gov.mail.protection.outlook.com2015-09-01 → 2019-10-26 · 5 obs

○ 2008-02-19 08:12:12
● 2015-09-01 10:22:46
● 2019-10-26 13:25:02
○ 2020-02-22 03:34:50
○ 2026-02-26 14:27:08

○MXprimary.us.email.fireeyecloud.com2019-09-01 → 2020-09-20 · 5 obs

○ 2015-09-01 10:22:46
● 2019-09-01 06:38:06
● 2020-09-20 17:31:52
○ 2021-01-05 08:51:44
○ 2026-02-26 14:27:08

●MXprimary.us.etp.fireeyegov.com2021-01-05 → 2026-02-26 · 3 obs

○ 2020-09-20 17:31:52
● 2021-01-05 08:51:44
● 2026-02-26 14:27:08

●A128.150.221.2442026-02-14 → 2026-02-26 · 3 obs

○ 2022-01-07 20:59:32
● 2026-02-14 18:03:44
● 2026-02-26 14:27:08

○A128.150.4.1072008-02-19 → 2022-01-07 · 4 obs

● 2008-02-19 08:12:12
● 2022-01-07 20:59:32
○ 2026-02-14 18:03:44
○ 2026-02-26 14:27:08

○A2620:10f:6001:4::1072015-09-01 → 2022-01-07 · 5 obs

○ 2008-02-19 08:12:12
● 2015-09-01 10:22:46
● 2022-01-07 20:59:32
○ 2026-02-14 18:03:44
○ 2026-02-26 14:27:08

●A2620:10f:6002:221::2442026-02-14 → 2026-02-26 · 3 obs

○ 2022-01-07 20:59:32
● 2026-02-14 18:03:44
● 2026-02-26 14:27:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
gov	d.ns.gov, b.ns.gov, a.ns.gov, c.ns.gov	-
nsf.gov	ns1.nsf.gov, ns2.nsf.gov, ns3.nsf.gov	6 records

✅ Authoritative Response

Server: 128.150.2.55

NS records: ns1.nsf.gov, ns2.nsf.gov, ns3.nsf.gov

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 290ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`128.150.221.244`
AAAA	1	`2620:10f:6002:221::244`
NS	3	`ns1.nsf.gov, ns2.nsf.gov...`
MX	4	`alt1.us.etp.fireeyegov.com (pri: 20), primary.us.etp.fireeyegov.com (pri: 10)...`
TXT	22	`ZOOM_verify_vIOQy6f2SQWeZ2977lDjcQ, have-i-been-pwned-verification=4f6905149...`
SOA	1	`p-dns-i-gridmstr01.nsf.gov postmaster.ns`

📌 Glue Records Collected

Total: 6

In-bailiwick: 6 (ns1.nsf.gov, ns1.nsf.gov, ns2.nsf.gov...)

AI analysis

nsf.gov is a parent of ns1.nsf.gov, www-legacy-f5.nsf.gov, etap.nsf.gov, p-dns-ext-l-01.nsf.gov, bear.nsf.gov and several other host names.

nsf.gov resolves to two IPs: 2620:10f:6002:221::244 and 128.150.221.244.

Other host names, for instance www-legacy-f5.nsf.gov, share IP numbers with nsf.gov.

nsf.gov is delegated to four name servers: ns1.nsf.gov, ns2.nsf.gov, ns3.nsf.gov and p-dns-i-gridmstr01.nsf.gov.

nsf.gov at least partially shares name servers with other domains, for instance 2.150.128.in-addr.arpa, sr.nsf.gov, 224.150.128.in-addr.arpa, acpt.research.gov and govdelivery.nsf.gov.

Two IPs for hosts:

ns1.nsf.gov points to: 2620:10f:6001:2::55 and 128.150.2.55

ns2.nsf.gov points to: 2620:10f:6001:2::56 and 128.150.2.56

ns3.nsf.gov points to: 2620:10f:6025:1::20 and 128.150.1.20

One IP for a host:

p-dns-i-gridmstr01.nsf.gov points to: 128.150.224.62

Four mail servers handle nsf.gov: alt1.us.etp.fireeyegov.com, alt2.us.etp.fireeyegov.com, alt3.us.etp.fireeyegov.com and primary.us.etp.fireeyegov.com.

nsf.gov shares mail servers with other domains at least partially, including ees.hhs.gov, fatherhood.gov, cdc.gov, hiv.gov and simunition.com.