WWW.RTSAK.COM - ns1.as4u.org

Search for IP or hostnames:

ns1.as4u.org checked at 2025-11-18T22:05:01.144Z 4734ms 115/115/115 100% R:18 allDone:true timedOut:false

`ns1.as4u.org`

CNAME	`as4u.org`
NS	`ns.as4u.cz`
		A	2a01:28:ca:72::100:250 ^{🇨🇿 SuperNetwork}
		A	88.86.100.250^{🇨🇿 SuperNetwork}
NS	`ns.district9.cz`
MX	`mx1.as4u.org`
		A	2620:101:2011:300::21 ^{🇺🇸 CISCO-2}
		A	2620:101:2012:300::20 ^{🇺🇸 CISCO-2}
		A	23.90.105.186^{🇺🇸 CISCO-2}
		A	23.90.110.118^{🇺🇸 CISCO-2}
MX	`mx2.as4u.org`
		A	2620:101:2011:300::21 ^{🇺🇸 CISCO-2}
		A	2620:101:2012:300::20 ^{🇺🇸 CISCO-2}
		A	23.90.105.186^{🇺🇸 CISCO-2}
		A	23.90.110.118^{🇺🇸 CISCO-2}
NS	`ns.as4u.org`
		A	2a01:28:ca:72::100:200 ^{🇨🇿 SuperNetwork}
			PTR	`ns-01.as4u.org`
			PTR	`ns.as4u.org`
		A	88.86.100.200^{🇨🇿 SuperNetwork}
A	2a01:28:ca:72::100:195 ^{🇨🇿 SuperNetwork}
		PTR	`lba.as4u.org`
A	88.86.100.195^{🇨🇿 SuperNetwork}

`as4u.org`

	NS	`ns.as4u.cz`
	NS	`ns.district9.cz`
	MX	`mx1.as4u.org`
	MX	`mx2.as4u.org`
	NS	`ns.as4u.org`
	A	2a01:28:ca:72::100:195 ^{🇨🇿 SuperNetwork}
	A	88.86.100.195^{🇨🇿 SuperNetwork}

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AI analysis

ns1.as4u.org points to two IPs: 2a01:28:ca:72::100:195 and 88.86.100.195.

Other host names including booking-system.eu, ns.mpb.cz, ip158.mpb.cz, sumperk.cz and kcbilina.cz share IP numbers with ns1.as4u.org.

ns1.as4u.org is delegated to three name servers: ns.as4u.cz, ns.district9.cz and ns.as4u.org.

ns1.as4u.org at least partially shares name servers with other domains, including zlatastezkaceskehoraje.cz, media-gallery.eu, zstyniste.cz, slivovice.eu and kraslicko.cz.

These name servers are often used together with ns.forpsi.net.

Host names with two IPs:

ns.as4u.cz points to: 2a01:28:ca:72::100:250 and 88.86.100.250

ns.as4u.org points to: 2a01:28:ca:72::100:200 and 88.86.100.200

ns1.as4u.org is handled by two mail servers: mx1.as4u.org and mx2.as4u.org.

ns1.as4u.org uses the same mail server setup as other domains, such as as4u.org.

Host names with four IP numbers:

mx1.as4u.org and mx2.as4u.org point to 2620:101:2011:300::21, 2620:101:2012:300::20, 23.90.105.186 and 23.90.110.118.

Host names that point to 2620:101:2011:300::21: mx1.as4u.org and mx2.as4u.org.

Host names that point to 2620:101:2012:300::20: mx1.as4u.org and mx2.as4u.org.

Host names that point to 23.90.105.186: mx1.as4u.org and mx2.as4u.org.

Host names that point to 23.90.110.118: mx1.as4u.org and mx2.as4u.org.

dbq