`four51.com`

DNSSEC	⚠️ Not signed
A	209.134.131.131^{🇺🇸 VISI209.134.128.0/19 IAXS-BLK-1 VISI Incorporated 10290 West 70th Street Eden Prairie, MN 55344 US}
		PTR	`four51.com`
NS	`ns1-01.azure-dns.com` ⭐
		A	2603:1061:0:700::1^{🇺🇸 Microsoft2603:1000::/25 MICROSOFT}
			PTR	`ns1-01.azure-dns.com`
		A	13.107.236.1^{🇺🇸 Microsoft13.104.0.0/14 MICROSOFT}
			PTR	`ns1-01.azure-dns.com`
NS	`ns2-01.azure-dns.net`
		A	2620:1ec:8ec:700::1^{🇺🇸 Microsoft2620:1ec::/36 MICROSOFT}
			PTR	`ns2-01.azure-dns.net`
		A	150.171.21.1^{🇺🇸 Microsoft150.171.0.0/16 MICROSOFT}
			PTR	`ns2-01.azure-dns.net`
NS	`ns3-01.azure-dns.org`
		A	2a01:111:4000:700::1^{🇬🇧 Microsoft2a01:111:4000::/36}
			PTR	`ns3-01.azure-dns.org`
		A	204.14.183.1^{🇺🇸 Microsoft204.14.180.0/22}
			PTR	`ns3-01.azure-dns.org`
NS	`ns4-01.azure-dns.info`
		A	2620:1ec:bda:700::1^{🇺🇸 Microsoft2620:1ec::/36 MICROSOFT}
			PTR	`ns4-01.azure-dns.info`
		A	208.84.5.1^{🇺🇸 Microsoft208.84.0.0/21 MICROSOFT}
			PTR	`ns4-01.azure-dns.info`
MX	`four51-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::1^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00401.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::b^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-dbbpr03cu00103.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::c^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db9pr02cu00204.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::7^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am9pr04cu00107.inbound.protection.outlook.com`
		A	52.101.68.39^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00607.inbound.protection.outlook.com`
		A	52.101.73.8^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am0pr04cu00500.inbound.protection.outlook.com`
		A	52.101.73.12^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am4pr0401cu00104.inbound.protection.outlook.com`
		A	52.101.73.16^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as2pr05cu00100.inbound.protection.outlook.com`
TXT	`v=spf1 mx a ip4:209.134.131.132 ip4:209.134.131.133 ip4:209.134.131.148 ip4:2...`
TXT	`MS=ms28546981`
TXT	`_tglqxp223bd3g3gi69ym6m96bv8ntia`
SOA	`ns1-01.azure-dns.com`azuredns-hostmaster@microsoft.com serial=1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1771291435

rank #766604 globally
rank #348583 in the tld
WOT: SAFE (72/100)
📈 Tranco rank: #672,305

PTR for

131.131.134.209.in-addr.arpa

Up

status.four51.com

mail.four51.com

www.four51.com

Same first word

four51.lpages.co

four51.io

four51.com

Similar names

four15.com

15four.com

DNS History

15 records (6 active, 9 former)

○NSns.visi.com2015-06-05 → 2017-03-16 · 3 obs

● 2015-06-05 22:01:16
● 2017-03-16 12:07:36
○ 2026-02-25 20:56:00

●NSns1-01.azure-dns.com2026-02-25 → 2026-02-25 · 2 obs

○ 2017-03-16 12:07:36
● 2026-02-25 20:56:00

●NSns2-01.azure-dns.net2026-02-25 → 2026-02-25 · 2 obs

○ 2017-03-16 12:07:36
● 2026-02-25 20:56:00

○NSns2.visi.com2015-06-05 → 2017-03-16 · 3 obs

● 2015-06-05 22:01:16
● 2017-03-16 12:07:36
○ 2026-02-25 20:56:00

●NSns3-01.azure-dns.org2026-02-25 → 2026-02-25 · 2 obs

○ 2017-03-16 12:07:36
● 2026-02-25 20:56:00

●NSns4-01.azure-dns.info2026-02-25 → 2026-02-25 · 2 obs

○ 2017-03-16 12:07:36
● 2026-02-25 20:56:00

○MXalt1.aspmx.l.google.com2015-06-05 → 2017-03-16 · 3 obs

● 2015-06-05 22:01:16
● 2017-03-16 12:07:36
○ 2026-02-25 20:56:00

○MXalt2.aspmx.l.google.com2015-06-05 → 2017-03-16 · 3 obs

● 2015-06-05 22:01:16
● 2017-03-16 12:07:36
○ 2026-02-25 20:56:00

○MXaspmx.l.google.com2015-06-05 → 2017-03-16 · 3 obs

● 2015-06-05 22:01:16
● 2017-03-16 12:07:36
○ 2026-02-25 20:56:00

○MXaspmx2.googlemail.com2015-06-05 → 2017-03-16 · 3 obs

● 2015-06-05 22:01:16
● 2017-03-16 12:07:36
○ 2026-02-25 20:56:00

○MXaspmx3.googlemail.com2015-06-05 → 2017-03-16 · 3 obs

● 2015-06-05 22:01:16
● 2017-03-16 12:07:36
○ 2026-02-25 20:56:00

○MXaspmx4.googlemail.com2015-06-05 → 2017-03-16 · 3 obs

● 2015-06-05 22:01:16
● 2017-03-16 12:07:36
○ 2026-02-25 20:56:00

○MXaspmx5.googlemail.com2015-06-05 → 2017-03-16 · 3 obs

● 2015-06-05 22:01:16
● 2017-03-16 12:07:36
○ 2026-02-25 20:56:00

●MXfour51-com.mail.protection.outlook.com2026-02-25 → 2026-02-25 · 2 obs

○ 2017-03-16 12:07:36
● 2026-02-25 20:56:00

●A209.134.131.1312015-06-05 → 2026-02-25 · 2 obs

● 2015-06-05 22:01:16
● 2026-02-25 20:56:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, h.gtld-servers.net, f.gtld-servers.net, d.gtld-servers.net...	-
four51.com	ns1-01.azure-dns.com, ns2-01.azure-dns.net, ns3-01.azure-dns.org, ns4-01.azure-dns.info	2 records

✅ Authoritative Response

Server: 204.14.183.1

NS records: ns1-01.azure-dns.com, ns2-01.azure-dns.net, ns3-01.azure-dns.org, ns4-01.azure-dns.info

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for four51.com (unsigned zone)

⏱️ Timing

Total: 495ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`209.134.131.131`
NS	4	`ns1-01.azure-dns.com, ns2-01.azure-dns.net...`
MX	1	`four51-com.mail.protection.outlook.com (`
TXT	3	`v=spf1 mx a ip4:209.134.131.132 ip4:209., MS=ms28546981...`
SOA	1	`ns1-01.azure-dns.com azuredns-hostmaster`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1-01.azure-dns.com, ns1-01.azure-dns.com)

AI analysis

four51.com is a parent of status.four51.com, mail.four51.com and www.four51.com.

four51.com points to a single IP address: 209.134.131.131.

Other host names, for instance www.four51.com, share IP numbers with four51.com.

four51.com is delegated to four name servers: ns1-01.azure-dns.com, ns4-01.azure-dns.info, ns2-01.azure-dns.net and ns3-01.azure-dns.org.

At least part of the name servers for four51.com are shared with other domains, for instance 171.20.in-addr.arpa, navision.cz, sds4.net, semil.sp.gov.br and b2miningdata.com.