🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`f1s.org`

DNSSEC	⚠️ Not signed
A	104.17.69.73^{Cloudflare104.17.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns-31.awsdns-03.com` ⭐
		A	2600:9000:5300:1f00::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-31.awsdns-03.com`
		A	205.251.192.31^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-31.awsdns-03.com`
NS	`ns-1508.awsdns-60.org`
		A	2600:9000:5305:e400::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1508.awsdns-60.org`
		A	205.251.197.228^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1508.awsdns-60.org`
NS	`ns-1615.awsdns-09.co.uk`
		A	2600:9000:5306:4f00::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1615.awsdns-09.co.uk`
		A	205.251.198.79^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1615.awsdns-09.co.uk`
NS	`ns-631.awsdns-14.net`
		A	2600:9000:5302:7700::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-631.awsdns-14.net`
		A	205.251.194.119^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-631.awsdns-14.net`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c1d::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`ww-in-f26.1e100.net`
		A	172.253.115.26^{🇺🇸 Google172.253.115.0/24}
			PTR	`bg-in-f26.1e100.net`
MX	`smtp.google.com` ⭐
		A	2607:f8b0:4004:c17::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bl-in-f26.1e100.net`
		A	2607:f8b0:4004:c17::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bl-in-f27.1e100.net`
		A	2607:f8b0:4004:c1f::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`pd-in-f26.1e100.net`
		A	2607:f8b0:4004:c1f::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`pd-in-f27.1e100.net`
		A	64.233.180.26^{🇺🇸 Google64.233.180.0/24}
			PTR	`on-in-f26.1e100.net`
			PTR	`pe-in-f26.1e100.net`
		A	142.251.16.26^{🇺🇸 Google142.251.16.0/24}
			PTR	`bl-in-f26.1e100.net`
		A	142.251.16.27^{🇺🇸 Google142.251.16.0/24}
			PTR	`bl-in-f27.1e100.net`
		A	142.251.179.26^{🇺🇸 Google142.251.179.0/24}
			PTR	`pd-in-f26.1e100.net`
		A	142.251.179.27^{🇺🇸 Google142.251.179.0/24}
			PTR	`pd-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c14::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	192.178.234.26^{🇺🇸 Google192.178.0.0/15}
			PTR	`ncsclj-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`aspmx2.googlemail.com`⁽¹⁰⁾
		A	2800:3f0:4003:c14::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	192.178.234.26^{🇺🇸 Google192.178.0.0/15}
			PTR	`ncsclj-in-f26.1e100.net`
MX	`aspmx3.googlemail.com`⁽¹⁰⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
TXT	`MS=ms41436287`
TXT	`apple-domain-verification=NDWVykzASIIEhHEG`
TXT	`duo_sso_verification=viJ70zFqG2cse6UqnaDrFBmW0tzLqNKVDOLXsAJa2eiWLhISZOVISnBc...`
TXT	`google-site-verification=9cJtM1irCzwj-tS6lnzBr0xYuknNICrkiq6YZHH5_Vc`
TXT	`google-site-verification=C9sFNqLdzpamudXv2yahhl7zcok64(0x354558)iywfza_OoWw`
TXT	`google-site-verification=ruDmX9EUurErpxn__DSstOFtzyTJvemJkH5q9nVAidE`
TXT	`v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCIEVYd9vQbQ60pfjbmmpJ...`
TXT	`v=spf1 mx ip4:12.171.92.2 ip4:12.171.93.123 ip4:12.171.93.124 include:spf.sch...`
SOA	`ns-31.awsdns-03.com`awsdns-hostmaster@amazon.com serial=58

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1786910720

Previously MX for

f1s.org

Subdomains

www.f1s.org

Same first word

f1s.com

f1s.com.au

f1s.org

f1s.casino

f1s.us

f1s.org.ua

f1s.in.ua

f1s.ch

f1s.net

f1s.me

f1s.com.br

f1s.pro

f1s.cn

f1s.de

Similar names

sf1.net.br

s1f.nl

sf1.org

1fs.eu

1fs.co

fs1.net

fs1.co

1fs.homes

sf1.fr

fs1.me

sf1.nl

s1f.ru

fs1.tv

1sf.org

fs1.ro

sf1.me

fs1.casino

fs1.dk

sf1.com.cn

1sf.ru

fs1.org

sf1.de

1fs.com.au

1fs.com.cn

fs1.com

fs1.biz

fs1.ir

fs1.at

1fs.de

s1f.com

sf1.co

1fs.cn

1sf.ai

1sf.us

1sf.net

sf1.pl

fs1.pp.ru

1fs.jp

1sf.mobi

fs1.com.ua

sf1.ch

fs1.co.il

sf1.eu

sf1.co.uk

1sf.me

fs1.ru

1fs.nl

fs1.jp

fs1.vg

sf1.it

fs1.eu

fs1.no

sf1.solutions

s1f.cn

1sf.eu

fs1.digital

fs1.tube

1sf.de

fs1.pl

sf1.com

sf1.ru

fs1.lol

1sf.com

sf1.cn

fs1.co.uk

fs1.app

1fs.com

fs1.de

sf1.net

s1f.ren

1fs.net

s1f.top

fs1.hopto.org

1fs.shop

fs1.ch

DNS History

18 records (11 active, 7 former)

●NSns-1508.awsdns-60.org2026-03-05 → 2026-08-16 · 3 obs

○ 2016-12-22 23:53:56
● 2026-03-05 01:14:22
● 2026-08-16 20:42:12

●NSns-1615.awsdns-09.co.uk2026-03-05 → 2026-08-16 · 3 obs

○ 2016-12-22 23:53:56
● 2026-03-05 01:14:22
● 2026-08-16 20:42:12

●NSns-31.awsdns-03.com2026-03-05 → 2026-08-16 · 3 obs

○ 2016-12-22 23:53:56
● 2026-03-05 01:14:22
● 2026-08-16 20:42:12

●NSns-631.awsdns-14.net2026-03-05 → 2026-08-16 · 3 obs

○ 2016-12-22 23:53:56
● 2026-03-05 01:14:22
● 2026-08-16 20:42:12

○NSns1.above.com2016-12-22 → 2016-12-22 · 4 obs

○ 2016-04-24 20:41:52
● 2016-12-22 23:53:56
○ 2026-03-05 01:14:22
○ 2026-08-16 20:42:12

○NSns2.above.com2016-12-22 → 2016-12-22 · 4 obs

○ 2016-04-24 20:41:52
● 2016-12-22 23:53:56
○ 2026-03-05 01:14:22
○ 2026-08-16 20:42:12

○NSns7.websitewelcome.com2015-12-01 → 2016-04-24 · 4 obs

● 2015-12-01 22:10:16
● 2016-04-24 20:41:52
○ 2016-12-22 23:53:56
○ 2026-08-16 20:42:12

○NSns8.websitewelcome.com2015-12-01 → 2016-04-24 · 4 obs

● 2015-12-01 22:10:16
● 2016-04-24 20:41:52
○ 2016-12-22 23:53:56
○ 2026-08-16 20:42:12

●MXalt1.aspmx.l.google.com2026-03-05 → 2026-08-16 · 3 obs

○ 2016-12-22 23:53:56
● 2026-03-05 01:14:22
● 2026-08-16 20:42:12

●MXalt2.aspmx.l.google.com2026-03-05 → 2026-08-16 · 3 obs

○ 2016-12-22 23:53:56
● 2026-03-05 01:14:22
● 2026-08-16 20:42:12

●MXaspmx.l.google.com2026-03-05 → 2026-08-16 · 3 obs

○ 2016-12-22 23:53:56
● 2026-03-05 01:14:22
● 2026-08-16 20:42:12

●MXaspmx2.googlemail.com2026-03-05 → 2026-08-16 · 3 obs

○ 2016-12-22 23:53:56
● 2026-03-05 01:14:22
● 2026-08-16 20:42:12

●MXaspmx3.googlemail.com2026-03-05 → 2026-08-16 · 3 obs

○ 2016-12-22 23:53:56
● 2026-03-05 01:14:22
● 2026-08-16 20:42:12

○MXf1s.org2015-12-01 → 2016-04-24 · 4 obs

● 2015-12-01 22:10:16
● 2016-04-24 20:41:52
○ 2016-12-22 23:53:56
○ 2026-08-16 20:42:12

●MXsmtp.google.com2026-03-27 → 2026-08-16 · 3 obs

○ 2026-03-05 01:14:22
● 2026-03-27 19:33:48
● 2026-08-16 20:42:12

○A103.224.182.2502016-12-22 → 2016-12-22 · 4 obs

○ 2016-04-24 20:41:52
● 2016-12-22 23:53:56
○ 2026-03-05 01:14:22
○ 2026-08-16 20:42:12

●A104.17.69.732026-03-05 → 2026-08-16 · 3 obs

○ 2016-12-22 23:53:56
● 2026-03-05 01:14:22
● 2026-08-16 20:42:12

○A192.185.89.1712015-12-01 → 2016-04-24 · 4 obs

● 2015-12-01 22:10:16
● 2016-04-24 20:41:52
○ 2016-12-22 23:53:56
○ 2026-08-16 20:42:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
f1s.org	ns-1615.awsdns-09.co.uk, ns-31.awsdns-03.com, ns-631.awsdns-14.net, ns-1508.awsdns-60.org	2 records

✅ Authoritative Response

Server:205.251.197.228

NS records: ns-1615.awsdns-09.co.uk, ns-31.awsdns-03.com, ns-631.awsdns-14.net, ns-1508.awsdns-60.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for f1s.org (unsigned zone)

⏱️ Timing

Total: 470ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`104.17.69.73`
NS	4	`ns-1508.awsdns-60.org, ns-1615.awsdns-09.co.uk...`
MX	6	`aspmx.l.google.com (pri: 1), smtp.google.com (pri: 1)...`
TXT	8	`MS=ms41436287, apple-domain-verification=NDWVykzASIIEhH...`
SOA	1	`ns-31.awsdns-03.com awsdns-hostmaster.am`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-1508.awsdns-60.org, ns-1508.awsdns-60.org)

Analysis

Hierarchy

www.f1s.org is a subdomain of f1s.org.

IP Addresses

f1s.org has exactly one IP address — 104.17.69.73.

montessoriacademyofcolorado.org, pineesd.org, cm.edu.gt plus two other host names have IP numbers in common with f1s.org.

Name Servers

Four name servers handle the delegation for f1s.org: ns-31.awsdns-03.com, ns-631.awsdns-14.net, ns-1508.awsdns-60.org and ns-1615.awsdns-09.co.uk.

The name servers of f1s.org overlap at least partially with those of other domains — among them bande-kizuna31.com, d5mnarjz2gzfw.cloudfront.net, payfacto.cloud and two more.

Each of the four hosts ns-31.awsdns-03.com, ns-631.awsdns-14.net, ns-1508.awsdns-60.org and ns-1615.awsdns-09.co.uk has two IP addresses. ns-31.awsdns-03.com points to 205.251.192.31 and 2600:9000:5300:1f00::1. ns-631.awsdns-14.net points to 205.251.194.119 and 2600:9000:5302:7700::1. ns-1508.awsdns-60.org points to 205.251.197.228 and 2600:9000:5305:e400::1. ns-1615.awsdns-09.co.uk points to 205.251.198.79 and 2600:9000:5306:4f00::1.

Mail Servers

f1s.org has 6 mail servers — smtp.google.com, aspmx2.googlemail.com, aspmx3.googlemail.com plus 3 other.

At least some of the mail servers used by f1s.org are shared with other domains: granatstein.com, gannexplained.com, 14marketing.com and two others among them.

These mail servers are often deployed together with alt2.aspmx.l.google.com, aspmx.l.google.com, alt1.aspmx.l.google.com and 4 other mail servers.

Hosts with 9 IP addresses each:

smtp.google.com maps to 64.233.180.26, 142.251.16.26, 142.251.16.27 and 6 additional IP addresses.

Host names pointing to two IP addresses:

The A records for aspmx2.googlemail.com return 192.178.234.26 and 2800:3f0:4003:c14::1a.

The A records for aspmx3.googlemail.com return 172.253.116.27 and 2a00:1450:400b:c02::1a.

The A records for aspmx.l.google.com return 172.253.115.26 and 2607:f8b0:4004:c1d::1a.

The A records for alt1.aspmx.l.google.com return 192.178.234.26 and 2800:3f0:4003:c14::1b.

The A records for alt2.aspmx.l.google.com return 172.253.116.27 and 2a00:1450:400b:c02::1b.

aspmx2.googlemail.com and alt1.aspmx.l.google.com each have 192.178.234.26 IP addresses.

aspmx3.googlemail.com and alt2.aspmx.l.google.com each have 172.253.116.27 IP addresses.