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old-nameserver1.concentric.net checked at 2025-10-10T16:20:33.582Z 127ms 25/25/25 100% R:11

`old-nameserver1.concentric.net`

A	207.155.183.73^{🇺🇸 XO Communications}
		PTR	`marquette.concentric.net`
		PTR	`old-nameserver1.concentric.net`

rank #25321 globally
rank #889 in the tld

73.183.155.207.in-addr.arpa

old-nameserver1.concentric.net resolves to a single IP address: 207.155.183.73.

Other host names, for instance marquette.concentric.net, share IP numbers with old-nameserver1.concentric.net.

dbq