AS14143 — RSINET-1

AS14143 announces 3 IPv4 prefixes covering 1,792 addresses and 0 IPv6 prefixes.

About this network

One allocation, one netname, and three announcements that step down by half each time.

What it's used for

• A regional internet and telephone provider's network. 1,792 addresses across three IPv4 prefixes, with one observed BGP neighbour and no IPv6 announced.

Notable

• The blocks run 104.219.136.0/22, 104.219.140.0/23 and 104.219.142.0/24, each half the size of the one before and starting where the last one ended.
• All three carry the netname NETBLK1-RSI and the same registrant.
• Nine addresses were queried for reverse DNS and none returned a name.
• The AS first appeared in routing on 2000-08-18.

Interesting

• Those three pieces are one span of addresses described exactly. The span is not a power of two, so covering it takes a large block, then half of the remainder, then half of what is left. Every network that announces a range rather than an allocation produces this staircase.
• The registry sees one record and the routing table sees three, which is the whole cost of the arrangement and it falls on everyone else.
• The netname numbers itself first, so this is the provider's first and, so far, only allocation. Everything the company serves comes out of these 1,792 addresses.
• One upstream for a provider selling both internet and telephone service is the thin part. Voice traffic is the least forgiving thing to carry over a single path.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 104.219.136.0/22
• 104.219.140.0/23
• 104.219.142.0/24

Upstream networks

• AS17293 VTX Communications LLC

Adjacent networks

• AS17293 VTX Communications LLC