AS14203 — JUNIPER-NETWORKS

AS14203 announces 14 IPv4 prefixes covering 6,920 addresses and 1 IPv6 prefixes.

About this network

It announces an eight-address prefix, smaller than most networks on the internet will accept.

What it's used for

• A router vendor's corporate network. 6,920 addresses across 14 IPv4 prefixes and 14 IPv6 prefixes, with 16 observed BGP neighbours.

Notable

• The smallest announcement is 165.254.24.16/29, eight addresses.
• Eight blocks carry the netname JUNIPER-NET; 12.0.126.0/23 carries JUNIPER-51-126 under a separate all-capitals registrant record.
• 67.91.204.0/23 carries XO-67-91-204-0 and 208.184.90.0/23 carries ABOVENET-6 registered to Zayo Bandwidth, both provider names rather than the announcer's.
• Three of eighteen sampled addresses returned names of the form net66-129-225.juniper.net.

Interesting

• Prefixes that small are filtered by most large networks, which stop at /24. Announcing one is either an experiment or a standing test of who still carries it, and a company that builds routers is unusually well placed to care about the answer.
• Two blocks are named after carriers, one of which no longer exists under that name. Address space handed out by a provider keeps the provider's label forever, even after the customer starts announcing it themselves.
• The reverse names identify a /24 rather than a host, so every address in a block answers with the same name. A vendor's corporate network revealing nothing per-machine is a choice, not an oversight.

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

Announced prefixes

• 12.0.126.0/23
• 66.129.224.0/22
• 66.129.232.0/22
• 66.129.237.0/24
• 66.129.238.0/23
• 66.129.240.0/22
• 66.129.244.0/23
• 66.129.246.0/24
• 66.129.250.0/24
• 67.91.204.0/23
• 165.254.24.16/29
• 198.186.160.0/24
• 207.17.137.0/24
• 208.184.90.0/23
• 2620:103:c000::/40

Upstream networks

• AS2914 NTT America, Inc.
• AS33650 Comcast Cable Communications, LLC
• AS33651 Comcast Cable Communications, LLC
• AS7018 AT&T Enterprises, LLC
• AS20055 Wholesail networks LLC
• AS6939 Hurricane Electric LLC
• AS7015 Comcast Cable Communications, LLC
• AS33667 Comcast Cable Communications, LLC
• AS209 CenturyLink Communications, LLC
• AS24482 SG.GS
• AS22773 Cox Communications Inc.

Adjacent networks

• AS2914 NTT America, Inc.
• AS33650 Comcast Cable Communications, LLC
• AS33651 Comcast Cable Communications, LLC
• AS7018 AT&T Enterprises, LLC
• AS20055 Wholesail networks LLC
• AS6939 Hurricane Electric LLC
• AS7015 Comcast Cable Communications, LLC
• AS33667 Comcast Cable Communications, LLC
• AS209 CenturyLink Communications, LLC
• AS24482 SG.GS
• AS22773 Cox Communications Inc.

Internet exchanges

• Equinix Internet Exchange San Jose (Bay Area) — San Jose, United States
• Equinix IBX Secaucus — Secaucus, United States