AS16224 FIFA-AS

Six netnames are just an address with the word reassign after it, and the address they name is not the block.

What it's used for

• A carrier-run enterprise network. Eight IPv4 prefixes announced from the United Kingdom, no IPv6, two thousand five hundred and sixty addresses, through one observed BGP neighbour.

Notable

• The AS handle is a four-letter acronym and the letters for an autonomous system. The holder field names a carrier instead, and the acronym belongs to its customer.
• Six blocks share two netnames, each built from four numbers with hyphens and the word for reassignment. Both name a parent range, so six separate registrations advertise the block they were cut from rather than themselves.
• Those six are registered to a three-letter handle that matches nothing else in the record.
• The last two blocks use a two-letter netname, an abbreviation of the carrier, and are registered to the acronym from the handle, so customer and carrier swap places between the two halves of the record.
• All eight sit inside one legacy range, scattered across it with gaps between them.
• Eighteen addresses were queried for reverse DNS and none returned a name.

Interesting

• Reassignment netnames are what a carrier writes when it hands a customer part of a larger allocation. The record describes the paperwork, not the network, which is why one string covers six blocks.
• An acronym in the handle and a carrier in the holder field is the signature of a managed network: the customer's name in routing, the carrier's name on the contract.