AS16236 — PSA

AS16236 announces 27 IPv4 prefixes covering 265,216 addresses and 1 IPv6 prefixes.

About this network

Four generations of carmaker branding in one record, and the netnames encode the address they cover.

What it's used for

• A carmaker's corporate network. Seventy-six prefixes announced from France, one of them IPv6, two hundred and sixty-five thousand two hundred and sixteen addresses, through five observed BGP neighbours.

Notable

• The AS handle is a three-letter group name. The holder field names the merged company that group became. The netnames carry a fourth-letter abbreviation of one predecessor and the full name of another. The reverse names use the second predecessor's domain.
• Every netname ends in a five-digit number that is the block's own address: the first octet, then the second, run together. Blocks sharing a first two octets share a netname, so one string covers as many as five separate registrations.
• All sampled blocks are registered to the current company and an abuse role, so the contacts were updated while the netnames were not.
• Nine of eighteen queried addresses answered, all of them the four numbers of the address with hyphens on the predecessor's domain, with no other label.
• The blocks are all cut from one legacy range, in sizes from a full sixty-five thousand addresses down to four thousand.

Interesting

• Encoding the address into the netname makes the registry self-indexing: given a block, its name is predictable without a lookup. It also freezes the name to the address, which is why a merger changes everything except these strings.

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

Announced prefixes

• 81.255.178.0/24
• 90.115.208.0/23
• 151.87.0.0/16
• 151.88.0.0/18
• 151.88.64.0/19
• 151.88.96.0/21
• 151.88.104.0/22
• 151.88.108.0/23
• 151.88.110.0/24
• 151.88.113.0/24
• 151.88.114.0/23
• 151.88.116.0/22
• 151.88.120.0/21
• 151.88.128.0/17
• 151.91.0.0/19
• 151.91.35.0/24
• 151.91.38.0/24
• 151.91.48.0/20
• 151.91.64.0/18
• 151.91.128.0/17
• 151.92.0.0/16
• 193.43.48.0/20
• 194.2.56.0/23
• 194.2.86.0/24
• 194.3.4.0/24
• 194.104.188.0/22
• 194.250.98.0/24
• 2a00:ec20::/32

Upstream networks

• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS3257 GTT Communications Inc.
• AS174 Cogent Communications, LLC
• AS3215 Orange S.A.

Adjacent networks

• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS3257 GTT Communications Inc.
• AS174 Cogent Communications, LLC
• AS3215 Orange S.A.

Routing security

• RPKI: 36 valid, 0 invalid and 0 not-found announcements; 43 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 51 route objects.
• Listed in as-sets: AS-CTBC-CUSTOMERS49, AS-GLOBEINTERNET-CLIENTS, AS-GLOBEINTERNET-CLIENTS, AS-GTTCUST, AS-GTTCUST6, AS-PSA-FOR-OV, AS-RAIN.