NSLIST.NET - 21stsystems.com

Search for IP or hostnames:

21stsystems.com checked at 2025-10-20T05:03:52.282Z 192ms 87/87/87 100% R:19

`21stsystems.com`

MX	`mail.21stsystems.com`
NS	`ns53.worldnic.com`
		A	162.159.26.165^Cloudflare
NS	`ns54.worldnic.com`
		A	162.159.27.8^Cloudflare
MX	`21stsystems-com.mail.protection.outlook.com`
		A	2a01:111:f403:c91d:: ^{🇺🇸 Microsoft}
			PTR	`mail-mw2pr04cu00100.inbound.protection.outlook.com`
		A	2a01:111:f403:c922::2 ^{🇺🇸 Microsoft}
			PTR	`mail-bl0pr02cu00702.inbound.protection.outlook.com`
		A	2a01:111:f403:f902::2 ^{🇺🇸 Microsoft}
			PTR	`mail-mn2pr02cu00202.inbound.protection.outlook.com`
		A	2a01:111:f403:f90a:: ^{🇺🇸 Microsoft}
			PTR	`mail-bn6pr02cu00300.inbound.protection.outlook.com`
		A	52.101.8.51^{🇺🇸 Microsoft}
			PTR	`mail-dm1pr04cu00203.inbound.protection.outlook.com`
		A	52.101.9.2^{🇺🇸 Microsoft}
			PTR	`mail-mn2pr02cu00202.inbound.protection.outlook.com`
		A	52.101.11.3^{🇺🇸 Microsoft}
			PTR	`mail-sn1pr0501cu00103.inbound.protection.outlook.com`
		A	52.101.41.26^{🇺🇸 Microsoft}
			PTR	`mail-sj0pr03cu01702.inbound.protection.outlook.com`
A	99.43.124.129^{🇺🇸 AT&T US - 7018}
		PTR	`mail.21stsystems.com`

vpnhost.21stsystems.com

21stsystems.com

21stsystems.com

The parent of vpnhost.21stsystems.com is 21stsystems.com.

21stsystems.com points to a single IP: 99.43.124.129.

Two name servers ns53.worldnic.com and ns54.worldnic.com handle delegation for 21stsystems.com.

21stsystems.com uses the same name server setup as other domains, for example niemuth.org, gulfsouthcustoms.com, jldgroupinc.com, ireko.com and bustersrepo.com.

Host names with one IP number: The host name ns53.worldnic.com points to 162.159.26.165 and the host name ns54.worldnic.com points to 162.159.27.8.

21stsystems.com is handled by two mail servers: mail.21stsystems.com and 21stsystems-com.mail.protection.outlook.com.

Eight IP numbers per host name: 21stsystems-com.mail.protection.outlook.com points to 2a01:111:f403:c91d::, 2a01:111:f403:c922::2, 2a01:111:f403:f902::2, 2a01:111:f403:f90a::, 52.101.8.51, 52.101.9.2, 52.101.11.3 and 52.101.41.26.

dbq