AS16563 NEXUM-ASN

The reverse-DNS domain is the initials of the operations centre listed as the block's contact.

What it's used for

• A security company's network. One IPv4 prefix announced from the United States, no IPv6, five hundred and twelve addresses, through three observed BGP neighbours.

Notable

• The AS handle is the company name with three more letters for an autonomous system number, which is redundant with the field it sits in.
• The netname is the same company name with the word for a network, and the registrant is the company again with its corporate suffix. Three fields, one name, three lengths.
• The block lists a second contact: an operations centre named in full, five words joining the company, its trade, networks, and the centre itself.
• Two of three queried addresses answered, each the address with hyphens on a five-letter domain.
• Those five letters are the initials of that spelled-out operations centre.

Interesting

• A registry contact written out at full length and a reverse zone written at minimum length are the same name at two ends of the same organisation. One field was filled in for people; the other was chosen for typing.
• Five hundred addresses behind three upstreams is more routing redundancy than most networks this size buy, which for a company selling network security is the demonstration that costs least.
• The whole record is internally consistent, which is rare enough to note. Nothing here belongs to anybody else, and every field says the same thing at a different volume.